diff options
Diffstat (limited to 'third_party/git/xdiff')
| -rw-r--r-- | third_party/git/xdiff/xdiff.h | 146 | ||||
| -rw-r--r-- | third_party/git/xdiff/xdiffi.c | 1043 | ||||
| -rw-r--r-- | third_party/git/xdiff/xdiffi.h | 64 | ||||
| -rw-r--r-- | third_party/git/xdiff/xemit.c | 312 | ||||
| -rw-r--r-- | third_party/git/xdiff/xemit.h | 36 | ||||
| -rw-r--r-- | third_party/git/xdiff/xhistogram.c | 384 | ||||
| -rw-r--r-- | third_party/git/xdiff/xinclude.h | 36 | ||||
| -rw-r--r-- | third_party/git/xdiff/xmacros.h | 54 | ||||
| -rw-r--r-- | third_party/git/xdiff/xmerge.c | 686 | ||||
| -rw-r--r-- | third_party/git/xdiff/xpatience.c | 388 | ||||
| -rw-r--r-- | third_party/git/xdiff/xprepare.c | 483 | ||||
| -rw-r--r-- | third_party/git/xdiff/xprepare.h | 34 | ||||
| -rw-r--r-- | third_party/git/xdiff/xtypes.h | 67 | ||||
| -rw-r--r-- | third_party/git/xdiff/xutils.c | 434 | ||||
| -rw-r--r-- | third_party/git/xdiff/xutils.h | 47 |
15 files changed, 0 insertions, 4214 deletions
diff --git a/third_party/git/xdiff/xdiff.h b/third_party/git/xdiff/xdiff.h deleted file mode 100644 index 032e3a9f41..0000000000 --- a/third_party/git/xdiff/xdiff.h +++ /dev/null @@ -1,146 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#if !defined(XDIFF_H) -#define XDIFF_H - -#ifdef __cplusplus -extern "C" { -#endif /* #ifdef __cplusplus */ - -/* xpparm_t.flags */ -#define XDF_NEED_MINIMAL (1 << 0) - -#define XDF_IGNORE_WHITESPACE (1 << 1) -#define XDF_IGNORE_WHITESPACE_CHANGE (1 << 2) -#define XDF_IGNORE_WHITESPACE_AT_EOL (1 << 3) -#define XDF_IGNORE_CR_AT_EOL (1 << 4) -#define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | \ - XDF_IGNORE_WHITESPACE_CHANGE | \ - XDF_IGNORE_WHITESPACE_AT_EOL | \ - XDF_IGNORE_CR_AT_EOL) - -#define XDF_IGNORE_BLANK_LINES (1 << 7) - -#define XDF_PATIENCE_DIFF (1 << 14) -#define XDF_HISTOGRAM_DIFF (1 << 15) -#define XDF_DIFF_ALGORITHM_MASK (XDF_PATIENCE_DIFF | XDF_HISTOGRAM_DIFF) -#define XDF_DIFF_ALG(x) ((x) & XDF_DIFF_ALGORITHM_MASK) - -#define XDF_INDENT_HEURISTIC (1 << 23) - -/* xdemitconf_t.flags */ -#define XDL_EMIT_FUNCNAMES (1 << 0) -#define XDL_EMIT_FUNCCONTEXT (1 << 2) - -/* merge simplification levels */ -#define XDL_MERGE_MINIMAL 0 -#define XDL_MERGE_EAGER 1 -#define XDL_MERGE_ZEALOUS 2 -#define XDL_MERGE_ZEALOUS_ALNUM 3 - -/* merge favor modes */ -#define XDL_MERGE_FAVOR_OURS 1 -#define XDL_MERGE_FAVOR_THEIRS 2 -#define XDL_MERGE_FAVOR_UNION 3 - -/* merge output styles */ -#define XDL_MERGE_DIFF3 1 - -typedef struct s_mmfile { - char *ptr; - long size; -} mmfile_t; - -typedef struct s_mmbuffer { - char *ptr; - long size; -} mmbuffer_t; - -typedef struct s_xpparam { - unsigned long flags; - - /* See Documentation/diff-options.txt. */ - char **anchors; - size_t anchors_nr; -} xpparam_t; - -typedef struct s_xdemitcb { - void *priv; - int (*out_hunk)(void *, - long old_begin, long old_nr, - long new_begin, long new_nr, - const char *func, long funclen); - int (*out_line)(void *, mmbuffer_t *, int); -} xdemitcb_t; - -typedef long (*find_func_t)(const char *line, long line_len, char *buffer, long buffer_size, void *priv); - -typedef int (*xdl_emit_hunk_consume_func_t)(long start_a, long count_a, - long start_b, long count_b, - void *cb_data); - -typedef struct s_xdemitconf { - long ctxlen; - long interhunkctxlen; - unsigned long flags; - find_func_t find_func; - void *find_func_priv; - xdl_emit_hunk_consume_func_t hunk_func; -} xdemitconf_t; - -typedef struct s_bdiffparam { - long bsize; -} bdiffparam_t; - - -#define xdl_malloc(x) xmalloc(x) -#define xdl_free(ptr) free(ptr) -#define xdl_realloc(ptr,x) xrealloc(ptr,x) - -void *xdl_mmfile_first(mmfile_t *mmf, long *size); -long xdl_mmfile_size(mmfile_t *mmf); - -int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, - xdemitconf_t const *xecfg, xdemitcb_t *ecb); - -typedef struct s_xmparam { - xpparam_t xpp; - int marker_size; - int level; - int favor; - int style; - const char *ancestor; /* label for orig */ - const char *file1; /* label for mf1 */ - const char *file2; /* label for mf2 */ -} xmparam_t; - -#define DEFAULT_CONFLICT_MARKER_SIZE 7 - -int xdl_merge(mmfile_t *orig, mmfile_t *mf1, mmfile_t *mf2, - xmparam_t const *xmp, mmbuffer_t *result); - -#ifdef __cplusplus -} -#endif /* #ifdef __cplusplus */ - -#endif /* #if !defined(XDIFF_H) */ diff --git a/third_party/git/xdiff/xdiffi.c b/third_party/git/xdiff/xdiffi.c deleted file mode 100644 index 1f1f4a3c78..0000000000 --- a/third_party/git/xdiff/xdiffi.c +++ /dev/null @@ -1,1043 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#include "xinclude.h" - -#define XDL_MAX_COST_MIN 256 -#define XDL_HEUR_MIN_COST 256 -#define XDL_LINE_MAX (long)((1UL << (CHAR_BIT * sizeof(long) - 1)) - 1) -#define XDL_SNAKE_CNT 20 -#define XDL_K_HEUR 4 - -typedef struct s_xdpsplit { - long i1, i2; - int min_lo, min_hi; -} xdpsplit_t; - -/* - * See "An O(ND) Difference Algorithm and its Variations", by Eugene Myers. - * Basically considers a "box" (off1, off2, lim1, lim2) and scan from both - * the forward diagonal starting from (off1, off2) and the backward diagonal - * starting from (lim1, lim2). If the K values on the same diagonal crosses - * returns the furthest point of reach. We might end up having to expensive - * cases using this algorithm is full, so a little bit of heuristic is needed - * to cut the search and to return a suboptimal point. - */ -static long xdl_split(unsigned long const *ha1, long off1, long lim1, - unsigned long const *ha2, long off2, long lim2, - long *kvdf, long *kvdb, int need_min, xdpsplit_t *spl, - xdalgoenv_t *xenv) { - long dmin = off1 - lim2, dmax = lim1 - off2; - long fmid = off1 - off2, bmid = lim1 - lim2; - long odd = (fmid - bmid) & 1; - long fmin = fmid, fmax = fmid; - long bmin = bmid, bmax = bmid; - long ec, d, i1, i2, prev1, best, dd, v, k; - - /* - * Set initial diagonal values for both forward and backward path. - */ - kvdf[fmid] = off1; - kvdb[bmid] = lim1; - - for (ec = 1;; ec++) { - int got_snake = 0; - - /* - * We need to extent the diagonal "domain" by one. If the next - * values exits the box boundaries we need to change it in the - * opposite direction because (max - min) must be a power of two. - * Also we initialize the external K value to -1 so that we can - * avoid extra conditions check inside the core loop. - */ - if (fmin > dmin) - kvdf[--fmin - 1] = -1; - else - ++fmin; - if (fmax < dmax) - kvdf[++fmax + 1] = -1; - else - --fmax; - - for (d = fmax; d >= fmin; d -= 2) { - if (kvdf[d - 1] >= kvdf[d + 1]) - i1 = kvdf[d - 1] + 1; - else - i1 = kvdf[d + 1]; - prev1 = i1; - i2 = i1 - d; - for (; i1 < lim1 && i2 < lim2 && ha1[i1] == ha2[i2]; i1++, i2++); - if (i1 - prev1 > xenv->snake_cnt) - got_snake = 1; - kvdf[d] = i1; - if (odd && bmin <= d && d <= bmax && kvdb[d] <= i1) { - spl->i1 = i1; - spl->i2 = i2; - spl->min_lo = spl->min_hi = 1; - return ec; - } - } - - /* - * We need to extent the diagonal "domain" by one. If the next - * values exits the box boundaries we need to change it in the - * opposite direction because (max - min) must be a power of two. - * Also we initialize the external K value to -1 so that we can - * avoid extra conditions check inside the core loop. - */ - if (bmin > dmin) - kvdb[--bmin - 1] = XDL_LINE_MAX; - else - ++bmin; - if (bmax < dmax) - kvdb[++bmax + 1] = XDL_LINE_MAX; - else - --bmax; - - for (d = bmax; d >= bmin; d -= 2) { - if (kvdb[d - 1] < kvdb[d + 1]) - i1 = kvdb[d - 1]; - else - i1 = kvdb[d + 1] - 1; - prev1 = i1; - i2 = i1 - d; - for (; i1 > off1 && i2 > off2 && ha1[i1 - 1] == ha2[i2 - 1]; i1--, i2--); - if (prev1 - i1 > xenv->snake_cnt) - got_snake = 1; - kvdb[d] = i1; - if (!odd && fmin <= d && d <= fmax && i1 <= kvdf[d]) { - spl->i1 = i1; - spl->i2 = i2; - spl->min_lo = spl->min_hi = 1; - return ec; - } - } - - if (need_min) - continue; - - /* - * If the edit cost is above the heuristic trigger and if - * we got a good snake, we sample current diagonals to see - * if some of the, have reached an "interesting" path. Our - * measure is a function of the distance from the diagonal - * corner (i1 + i2) penalized with the distance from the - * mid diagonal itself. If this value is above the current - * edit cost times a magic factor (XDL_K_HEUR) we consider - * it interesting. - */ - if (got_snake && ec > xenv->heur_min) { - for (best = 0, d = fmax; d >= fmin; d -= 2) { - dd = d > fmid ? d - fmid: fmid - d; - i1 = kvdf[d]; - i2 = i1 - d; - v = (i1 - off1) + (i2 - off2) - dd; - - if (v > XDL_K_HEUR * ec && v > best && - off1 + xenv->snake_cnt <= i1 && i1 < lim1 && - off2 + xenv->snake_cnt <= i2 && i2 < lim2) { - for (k = 1; ha1[i1 - k] == ha2[i2 - k]; k++) - if (k == xenv->snake_cnt) { - best = v; - spl->i1 = i1; - spl->i2 = i2; - break; - } - } - } - if (best > 0) { - spl->min_lo = 1; - spl->min_hi = 0; - return ec; - } - - for (best = 0, d = bmax; d >= bmin; d -= 2) { - dd = d > bmid ? d - bmid: bmid - d; - i1 = kvdb[d]; - i2 = i1 - d; - v = (lim1 - i1) + (lim2 - i2) - dd; - - if (v > XDL_K_HEUR * ec && v > best && - off1 < i1 && i1 <= lim1 - xenv->snake_cnt && - off2 < i2 && i2 <= lim2 - xenv->snake_cnt) { - for (k = 0; ha1[i1 + k] == ha2[i2 + k]; k++) - if (k == xenv->snake_cnt - 1) { - best = v; - spl->i1 = i1; - spl->i2 = i2; - break; - } - } - } - if (best > 0) { - spl->min_lo = 0; - spl->min_hi = 1; - return ec; - } - } - - /* - * Enough is enough. We spent too much time here and now we collect - * the furthest reaching path using the (i1 + i2) measure. - */ - if (ec >= xenv->mxcost) { - long fbest, fbest1, bbest, bbest1; - - fbest = fbest1 = -1; - for (d = fmax; d >= fmin; d -= 2) { - i1 = XDL_MIN(kvdf[d], lim1); - i2 = i1 - d; - if (lim2 < i2) - i1 = lim2 + d, i2 = lim2; - if (fbest < i1 + i2) { - fbest = i1 + i2; - fbest1 = i1; - } - } - - bbest = bbest1 = XDL_LINE_MAX; - for (d = bmax; d >= bmin; d -= 2) { - i1 = XDL_MAX(off1, kvdb[d]); - i2 = i1 - d; - if (i2 < off2) - i1 = off2 + d, i2 = off2; - if (i1 + i2 < bbest) { - bbest = i1 + i2; - bbest1 = i1; - } - } - - if ((lim1 + lim2) - bbest < fbest - (off1 + off2)) { - spl->i1 = fbest1; - spl->i2 = fbest - fbest1; - spl->min_lo = 1; - spl->min_hi = 0; - } else { - spl->i1 = bbest1; - spl->i2 = bbest - bbest1; - spl->min_lo = 0; - spl->min_hi = 1; - } - return ec; - } - } -} - - -/* - * Rule: "Divide et Impera". Recursively split the box in sub-boxes by calling - * the box splitting function. Note that the real job (marking changed lines) - * is done in the two boundary reaching checks. - */ -int xdl_recs_cmp(diffdata_t *dd1, long off1, long lim1, - diffdata_t *dd2, long off2, long lim2, - long *kvdf, long *kvdb, int need_min, xdalgoenv_t *xenv) { - unsigned long const *ha1 = dd1->ha, *ha2 = dd2->ha; - - /* - * Shrink the box by walking through each diagonal snake (SW and NE). - */ - for (; off1 < lim1 && off2 < lim2 && ha1[off1] == ha2[off2]; off1++, off2++); - for (; off1 < lim1 && off2 < lim2 && ha1[lim1 - 1] == ha2[lim2 - 1]; lim1--, lim2--); - - /* - * If one dimension is empty, then all records on the other one must - * be obviously changed. - */ - if (off1 == lim1) { - char *rchg2 = dd2->rchg; - long *rindex2 = dd2->rindex; - - for (; off2 < lim2; off2++) - rchg2[rindex2[off2]] = 1; - } else if (off2 == lim2) { - char *rchg1 = dd1->rchg; - long *rindex1 = dd1->rindex; - - for (; off1 < lim1; off1++) - rchg1[rindex1[off1]] = 1; - } else { - xdpsplit_t spl; - spl.i1 = spl.i2 = 0; - - /* - * Divide ... - */ - if (xdl_split(ha1, off1, lim1, ha2, off2, lim2, kvdf, kvdb, - need_min, &spl, xenv) < 0) { - - return -1; - } - - /* - * ... et Impera. - */ - if (xdl_recs_cmp(dd1, off1, spl.i1, dd2, off2, spl.i2, - kvdf, kvdb, spl.min_lo, xenv) < 0 || - xdl_recs_cmp(dd1, spl.i1, lim1, dd2, spl.i2, lim2, - kvdf, kvdb, spl.min_hi, xenv) < 0) { - - return -1; - } - } - - return 0; -} - - -int xdl_do_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, - xdfenv_t *xe) { - long ndiags; - long *kvd, *kvdf, *kvdb; - xdalgoenv_t xenv; - diffdata_t dd1, dd2; - - if (XDF_DIFF_ALG(xpp->flags) == XDF_PATIENCE_DIFF) - return xdl_do_patience_diff(mf1, mf2, xpp, xe); - - if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF) - return xdl_do_histogram_diff(mf1, mf2, xpp, xe); - - if (xdl_prepare_env(mf1, mf2, xpp, xe) < 0) { - - return -1; - } - - /* - * Allocate and setup K vectors to be used by the differential algorithm. - * One is to store the forward path and one to store the backward path. - */ - ndiags = xe->xdf1.nreff + xe->xdf2.nreff + 3; - if (!(kvd = (long *) xdl_malloc((2 * ndiags + 2) * sizeof(long)))) { - - xdl_free_env(xe); - return -1; - } - kvdf = kvd; - kvdb = kvdf + ndiags; - kvdf += xe->xdf2.nreff + 1; - kvdb += xe->xdf2.nreff + 1; - - xenv.mxcost = xdl_bogosqrt(ndiags); - if (xenv.mxcost < XDL_MAX_COST_MIN) - xenv.mxcost = XDL_MAX_COST_MIN; - xenv.snake_cnt = XDL_SNAKE_CNT; - xenv.heur_min = XDL_HEUR_MIN_COST; - - dd1.nrec = xe->xdf1.nreff; - dd1.ha = xe->xdf1.ha; - dd1.rchg = xe->xdf1.rchg; - dd1.rindex = xe->xdf1.rindex; - dd2.nrec = xe->xdf2.nreff; - dd2.ha = xe->xdf2.ha; - dd2.rchg = xe->xdf2.rchg; - dd2.rindex = xe->xdf2.rindex; - - if (xdl_recs_cmp(&dd1, 0, dd1.nrec, &dd2, 0, dd2.nrec, - kvdf, kvdb, (xpp->flags & XDF_NEED_MINIMAL) != 0, &xenv) < 0) { - - xdl_free(kvd); - xdl_free_env(xe); - return -1; - } - - xdl_free(kvd); - - return 0; -} - - -static xdchange_t *xdl_add_change(xdchange_t *xscr, long i1, long i2, long chg1, long chg2) { - xdchange_t *xch; - - if (!(xch = (xdchange_t *) xdl_malloc(sizeof(xdchange_t)))) - return NULL; - - xch->next = xscr; - xch->i1 = i1; - xch->i2 = i2; - xch->chg1 = chg1; - xch->chg2 = chg2; - xch->ignore = 0; - - return xch; -} - - -static int recs_match(xrecord_t *rec1, xrecord_t *rec2, long flags) -{ - return (rec1->ha == rec2->ha && - xdl_recmatch(rec1->ptr, rec1->size, - rec2->ptr, rec2->size, - flags)); -} - -/* - * If a line is indented more than this, get_indent() just returns this value. - * This avoids having to do absurd amounts of work for data that are not - * human-readable text, and also ensures that the output of get_indent fits within - * an int. - */ -#define MAX_INDENT 200 - -/* - * Return the amount of indentation of the specified line, treating TAB as 8 - * columns. Return -1 if line is empty or contains only whitespace. Clamp the - * output value at MAX_INDENT. - */ -static int get_indent(xrecord_t *rec) -{ - long i; - int ret = 0; - - for (i = 0; i < rec->size; i++) { - char c = rec->ptr[i]; - - if (!XDL_ISSPACE(c)) - return ret; - else if (c == ' ') - ret += 1; - else if (c == '\t') - ret += 8 - ret % 8; - /* ignore other whitespace characters */ - - if (ret >= MAX_INDENT) - return MAX_INDENT; - } - - /* The line contains only whitespace. */ - return -1; -} - -/* - * If more than this number of consecutive blank rows are found, just return this - * value. This avoids requiring O(N^2) work for pathological cases, and also - * ensures that the output of score_split fits in an int. - */ -#define MAX_BLANKS 20 - -/* Characteristics measured about a hypothetical split position. */ -struct split_measurement { - /* - * Is the split at the end of the file (aside from any blank lines)? - */ - int end_of_file; - - /* - * How much is the line immediately following the split indented (or -1 if - * the line is blank): - */ - int indent; - - /* - * How many consecutive lines above the split are blank? - */ - int pre_blank; - - /* - * How much is the nearest non-blank line above the split indented (or -1 - * if there is no such line)? - */ - int pre_indent; - - /* - * How many lines after the line following the split are blank? - */ - int post_blank; - - /* - * How much is the nearest non-blank line after the line following the - * split indented (or -1 if there is no such line)? - */ - int post_indent; -}; - -struct split_score { - /* The effective indent of this split (smaller is preferred). */ - int effective_indent; - - /* Penalty for this split (smaller is preferred). */ - int penalty; -}; - -/* - * Fill m with information about a hypothetical split of xdf above line split. - */ -static void measure_split(const xdfile_t *xdf, long split, - struct split_measurement *m) -{ - long i; - - if (split >= xdf->nrec) { - m->end_of_file = 1; - m->indent = -1; - } else { - m->end_of_file = 0; - m->indent = get_indent(xdf->recs[split]); - } - - m->pre_blank = 0; - m->pre_indent = -1; - for (i = split - 1; i >= 0; i--) { - m->pre_indent = get_indent(xdf->recs[i]); - if (m->pre_indent != -1) - break; - m->pre_blank += 1; - if (m->pre_blank == MAX_BLANKS) { - m->pre_indent = 0; - break; - } - } - - m->post_blank = 0; - m->post_indent = -1; - for (i = split + 1; i < xdf->nrec; i++) { - m->post_indent = get_indent(xdf->recs[i]); - if (m->post_indent != -1) - break; - m->post_blank += 1; - if (m->post_blank == MAX_BLANKS) { - m->post_indent = 0; - break; - } - } -} - -/* - * The empirically-determined weight factors used by score_split() below. - * Larger values means that the position is a less favorable place to split. - * - * Note that scores are only ever compared against each other, so multiplying - * all of these weight/penalty values by the same factor wouldn't change the - * heuristic's behavior. Still, we need to set that arbitrary scale *somehow*. - * In practice, these numbers are chosen to be large enough that they can be - * adjusted relative to each other with sufficient precision despite using - * integer math. - */ - -/* Penalty if there are no non-blank lines before the split */ -#define START_OF_FILE_PENALTY 1 - -/* Penalty if there are no non-blank lines after the split */ -#define END_OF_FILE_PENALTY 21 - -/* Multiplier for the number of blank lines around the split */ -#define TOTAL_BLANK_WEIGHT (-30) - -/* Multiplier for the number of blank lines after the split */ -#define POST_BLANK_WEIGHT 6 - -/* - * Penalties applied if the line is indented more than its predecessor - */ -#define RELATIVE_INDENT_PENALTY (-4) -#define RELATIVE_INDENT_WITH_BLANK_PENALTY 10 - -/* - * Penalties applied if the line is indented less than both its predecessor and - * its successor - */ -#define RELATIVE_OUTDENT_PENALTY 24 -#define RELATIVE_OUTDENT_WITH_BLANK_PENALTY 17 - -/* - * Penalties applied if the line is indented less than its predecessor but not - * less than its successor - */ -#define RELATIVE_DEDENT_PENALTY 23 -#define RELATIVE_DEDENT_WITH_BLANK_PENALTY 17 - -/* - * We only consider whether the sum of the effective indents for splits are - * less than (-1), equal to (0), or greater than (+1) each other. The resulting - * value is multiplied by the following weight and combined with the penalty to - * determine the better of two scores. - */ -#define INDENT_WEIGHT 60 - -/* - * How far do we slide a hunk at most? - */ -#define INDENT_HEURISTIC_MAX_SLIDING 100 - -/* - * Compute a badness score for the hypothetical split whose measurements are - * stored in m. The weight factors were determined empirically using the tools and - * corpus described in - * - * https://github.com/mhagger/diff-slider-tools - * - * Also see that project if you want to improve the weights based on, for example, - * a larger or more diverse corpus. - */ -static void score_add_split(const struct split_measurement *m, struct split_score *s) -{ - /* - * A place to accumulate penalty factors (positive makes this index more - * favored): - */ - int post_blank, total_blank, indent, any_blanks; - - if (m->pre_indent == -1 && m->pre_blank == 0) - s->penalty += START_OF_FILE_PENALTY; - - if (m->end_of_file) - s->penalty += END_OF_FILE_PENALTY; - - /* - * Set post_blank to the number of blank lines following the split, - * including the line immediately after the split: - */ - post_blank = (m->indent == -1) ? 1 + m->post_blank : 0; - total_blank = m->pre_blank + post_blank; - - /* Penalties based on nearby blank lines: */ - s->penalty += TOTAL_BLANK_WEIGHT * total_blank; - s->penalty += POST_BLANK_WEIGHT * post_blank; - - if (m->indent != -1) - indent = m->indent; - else - indent = m->post_indent; - - any_blanks = (total_blank != 0); - - /* Note that the effective indent is -1 at the end of the file: */ - s->effective_indent += indent; - - if (indent == -1) { - /* No additional adjustments needed. */ - } else if (m->pre_indent == -1) { - /* No additional adjustments needed. */ - } else if (indent > m->pre_indent) { - /* - * The line is indented more than its predecessor. - */ - s->penalty += any_blanks ? - RELATIVE_INDENT_WITH_BLANK_PENALTY : - RELATIVE_INDENT_PENALTY; - } else if (indent == m->pre_indent) { - /* - * The line has the same indentation level as its predecessor. - * No additional adjustments needed. - */ - } else { - /* - * The line is indented less than its predecessor. It could be - * the block terminator of the previous block, but it could - * also be the start of a new block (e.g., an "else" block, or - * maybe the previous block didn't have a block terminator). - * Try to distinguish those cases based on what comes next: - */ - if (m->post_indent != -1 && m->post_indent > indent) { - /* - * The following line is indented more. So it is likely - * that this line is the start of a block. - */ - s->penalty += any_blanks ? - RELATIVE_OUTDENT_WITH_BLANK_PENALTY : - RELATIVE_OUTDENT_PENALTY; - } else { - /* - * That was probably the end of a block. - */ - s->penalty += any_blanks ? - RELATIVE_DEDENT_WITH_BLANK_PENALTY : - RELATIVE_DEDENT_PENALTY; - } - } -} - -static int score_cmp(struct split_score *s1, struct split_score *s2) -{ - /* -1 if s1.effective_indent < s2->effective_indent, etc. */ - int cmp_indents = ((s1->effective_indent > s2->effective_indent) - - (s1->effective_indent < s2->effective_indent)); - - return INDENT_WEIGHT * cmp_indents + (s1->penalty - s2->penalty); -} - -/* - * Represent a group of changed lines in an xdfile_t (i.e., a contiguous group - * of lines that was inserted or deleted from the corresponding version of the - * file). We consider there to be such a group at the beginning of the file, at - * the end of the file, and between any two unchanged lines, though most such - * groups will usually be empty. - * - * If the first line in a group is equal to the line following the group, then - * the group can be slid down. Similarly, if the last line in a group is equal - * to the line preceding the group, then the group can be slid up. See - * group_slide_down() and group_slide_up(). - * - * Note that loops that are testing for changed lines in xdf->rchg do not need - * index bounding since the array is prepared with a zero at position -1 and N. - */ -struct xdlgroup { - /* - * The index of the first changed line in the group, or the index of - * the unchanged line above which the (empty) group is located. - */ - long start; - - /* - * The index of the first unchanged line after the group. For an empty - * group, end is equal to start. - */ - long end; -}; - -/* - * Initialize g to point at the first group in xdf. - */ -static void group_init(xdfile_t *xdf, struct xdlgroup *g) -{ - g->start = g->end = 0; - while (xdf->rchg[g->end]) - g->end++; -} - -/* - * Move g to describe the next (possibly empty) group in xdf and return 0. If g - * is already at the end of the file, do nothing and return -1. - */ -static inline int group_next(xdfile_t *xdf, struct xdlgroup *g) -{ - if (g->end == xdf->nrec) - return -1; - - g->start = g->end + 1; - for (g->end = g->start; xdf->rchg[g->end]; g->end++) - ; - - return 0; -} - -/* - * Move g to describe the previous (possibly empty) group in xdf and return 0. - * If g is already at the beginning of the file, do nothing and return -1. - */ -static inline int group_previous(xdfile_t *xdf, struct xdlgroup *g) -{ - if (g->start == 0) - return -1; - - g->end = g->start - 1; - for (g->start = g->end; xdf->rchg[g->start - 1]; g->start--) - ; - - return 0; -} - -/* - * If g can be slid toward the end of the file, do so, and if it bumps into a - * following group, expand this group to include it. Return 0 on success or -1 - * if g cannot be slid down. - */ -static int group_slide_down(xdfile_t *xdf, struct xdlgroup *g, long flags) -{ - if (g->end < xdf->nrec && - recs_match(xdf->recs[g->start], xdf->recs[g->end], flags)) { - xdf->rchg[g->start++] = 0; - xdf->rchg[g->end++] = 1; - - while (xdf->rchg[g->end]) - g->end++; - - return 0; - } else { - return -1; - } -} - -/* - * If g can be slid toward the beginning of the file, do so, and if it bumps - * into a previous group, expand this group to include it. Return 0 on success - * or -1 if g cannot be slid up. - */ -static int group_slide_up(xdfile_t *xdf, struct xdlgroup *g, long flags) -{ - if (g->start > 0 && - recs_match(xdf->recs[g->start - 1], xdf->recs[g->end - 1], flags)) { - xdf->rchg[--g->start] = 1; - xdf->rchg[--g->end] = 0; - - while (xdf->rchg[g->start - 1]) - g->start--; - - return 0; - } else { - return -1; - } -} - -static void xdl_bug(const char *msg) -{ - fprintf(stderr, "BUG: %s\n", msg); - exit(1); -} - -/* - * Move back and forward change groups for a consistent and pretty diff output. - * This also helps in finding joinable change groups and reducing the diff - * size. - */ -int xdl_change_compact(xdfile_t *xdf, xdfile_t *xdfo, long flags) { - struct xdlgroup g, go; - long earliest_end, end_matching_other; - long groupsize; - - group_init(xdf, &g); - group_init(xdfo, &go); - - while (1) { - /* If the group is empty in the to-be-compacted file, skip it: */ - if (g.end == g.start) - goto next; - - /* - * Now shift the change up and then down as far as possible in - * each direction. If it bumps into any other changes, merge them. - */ - do { - groupsize = g.end - g.start; - - /* - * Keep track of the last "end" index that causes this - * group to align with a group of changed lines in the - * other file. -1 indicates that we haven't found such - * a match yet: - */ - end_matching_other = -1; - - /* Shift the group backward as much as possible: */ - while (!group_slide_up(xdf, &g, flags)) - if (group_previous(xdfo, &go)) - xdl_bug("group sync broken sliding up"); - - /* - * This is this highest that this group can be shifted. - * Record its end index: - */ - earliest_end = g.end; - - if (go.end > go.start) - end_matching_other = g.end; - - /* Now shift the group forward as far as possible: */ - while (1) { - if (group_slide_down(xdf, &g, flags)) - break; - if (group_next(xdfo, &go)) - xdl_bug("group sync broken sliding down"); - - if (go.end > go.start) - end_matching_other = g.end; - } - } while (groupsize != g.end - g.start); - - /* - * If the group can be shifted, then we can possibly use this - * freedom to produce a more intuitive diff. - * - * The group is currently shifted as far down as possible, so the - * heuristics below only have to handle upwards shifts. - */ - - if (g.end == earliest_end) { - /* no shifting was possible */ - } else if (end_matching_other != -1) { - /* - * Move the possibly merged group of changes back to line - * up with the last group of changes from the other file - * that it can align with. - */ - while (go.end == go.start) { - if (group_slide_up(xdf, &g, flags)) - xdl_bug("match disappeared"); - if (group_previous(xdfo, &go)) - xdl_bug("group sync broken sliding to match"); - } - } else if (flags & XDF_INDENT_HEURISTIC) { - /* - * Indent heuristic: a group of pure add/delete lines - * implies two splits, one between the end of the "before" - * context and the start of the group, and another between - * the end of the group and the beginning of the "after" - * context. Some splits are aesthetically better and some - * are worse. We compute a badness "score" for each split, - * and add the scores for the two splits to define a - * "score" for each position that the group can be shifted - * to. Then we pick the shift with the lowest score. - */ - long shift, best_shift = -1; - struct split_score best_score; - - shift = earliest_end; - if (g.end - groupsize - 1 > shift) - shift = g.end - groupsize - 1; - if (g.end - INDENT_HEURISTIC_MAX_SLIDING > shift) - shift = g.end - INDENT_HEURISTIC_MAX_SLIDING; - for (; shift <= g.end; shift++) { - struct split_measurement m; - struct split_score score = {0, 0}; - - measure_split(xdf, shift, &m); - score_add_split(&m, &score); - measure_split(xdf, shift - groupsize, &m); - score_add_split(&m, &score); - if (best_shift == -1 || - score_cmp(&score, &best_score) <= 0) { - best_score.effective_indent = score.effective_indent; - best_score.penalty = score.penalty; - best_shift = shift; - } - } - - while (g.end > best_shift) { - if (group_slide_up(xdf, &g, flags)) - xdl_bug("best shift unreached"); - if (group_previous(xdfo, &go)) - xdl_bug("group sync broken sliding to blank line"); - } - } - - next: - /* Move past the just-processed group: */ - if (group_next(xdf, &g)) - break; - if (group_next(xdfo, &go)) - xdl_bug("group sync broken moving to next group"); - } - - if (!group_next(xdfo, &go)) - xdl_bug("group sync broken at end of file"); - - return 0; -} - - -int xdl_build_script(xdfenv_t *xe, xdchange_t **xscr) { - xdchange_t *cscr = NULL, *xch; - char *rchg1 = xe->xdf1.rchg, *rchg2 = xe->xdf2.rchg; - long i1, i2, l1, l2; - - /* - * Trivial. Collects "groups" of changes and creates an edit script. - */ - for (i1 = xe->xdf1.nrec, i2 = xe->xdf2.nrec; i1 >= 0 || i2 >= 0; i1--, i2--) - if (rchg1[i1 - 1] || rchg2[i2 - 1]) { - for (l1 = i1; rchg1[i1 - 1]; i1--); - for (l2 = i2; rchg2[i2 - 1]; i2--); - - if (!(xch = xdl_add_change(cscr, i1, i2, l1 - i1, l2 - i2))) { - xdl_free_script(cscr); - return -1; - } - cscr = xch; - } - - *xscr = cscr; - - return 0; -} - - -void xdl_free_script(xdchange_t *xscr) { - xdchange_t *xch; - - while ((xch = xscr) != NULL) { - xscr = xscr->next; - xdl_free(xch); - } -} - -static int xdl_call_hunk_func(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, - xdemitconf_t const *xecfg) -{ - xdchange_t *xch, *xche; - - for (xch = xscr; xch; xch = xche->next) { - xche = xdl_get_hunk(&xch, xecfg); - if (!xch) - break; - if (xecfg->hunk_func(xch->i1, xche->i1 + xche->chg1 - xch->i1, - xch->i2, xche->i2 + xche->chg2 - xch->i2, - ecb->priv) < 0) - return -1; - } - return 0; -} - -static void xdl_mark_ignorable(xdchange_t *xscr, xdfenv_t *xe, long flags) -{ - xdchange_t *xch; - - for (xch = xscr; xch; xch = xch->next) { - int ignore = 1; - xrecord_t **rec; - long i; - - rec = &xe->xdf1.recs[xch->i1]; - for (i = 0; i < xch->chg1 && ignore; i++) - ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags); - - rec = &xe->xdf2.recs[xch->i2]; - for (i = 0; i < xch->chg2 && ignore; i++) - ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags); - - xch->ignore = ignore; - } -} - -int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, - xdemitconf_t const *xecfg, xdemitcb_t *ecb) { - xdchange_t *xscr; - xdfenv_t xe; - emit_func_t ef = xecfg->hunk_func ? xdl_call_hunk_func : xdl_emit_diff; - - if (xdl_do_diff(mf1, mf2, xpp, &xe) < 0) { - - return -1; - } - if (xdl_change_compact(&xe.xdf1, &xe.xdf2, xpp->flags) < 0 || - xdl_change_compact(&xe.xdf2, &xe.xdf1, xpp->flags) < 0 || - xdl_build_script(&xe, &xscr) < 0) { - - xdl_free_env(&xe); - return -1; - } - if (xscr) { - if (xpp->flags & XDF_IGNORE_BLANK_LINES) - xdl_mark_ignorable(xscr, &xe, xpp->flags); - - if (ef(&xe, xscr, ecb, xecfg) < 0) { - - xdl_free_script(xscr); - xdl_free_env(&xe); - return -1; - } - xdl_free_script(xscr); - } - xdl_free_env(&xe); - - return 0; -} diff --git a/third_party/git/xdiff/xdiffi.h b/third_party/git/xdiff/xdiffi.h deleted file mode 100644 index 8f1c7c8b04..0000000000 --- a/third_party/git/xdiff/xdiffi.h +++ /dev/null @@ -1,64 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#if !defined(XDIFFI_H) -#define XDIFFI_H - - -typedef struct s_diffdata { - long nrec; - unsigned long const *ha; - long *rindex; - char *rchg; -} diffdata_t; - -typedef struct s_xdalgoenv { - long mxcost; - long snake_cnt; - long heur_min; -} xdalgoenv_t; - -typedef struct s_xdchange { - struct s_xdchange *next; - long i1, i2; - long chg1, chg2; - int ignore; -} xdchange_t; - - - -int xdl_recs_cmp(diffdata_t *dd1, long off1, long lim1, - diffdata_t *dd2, long off2, long lim2, - long *kvdf, long *kvdb, int need_min, xdalgoenv_t *xenv); -int xdl_do_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, - xdfenv_t *xe); -int xdl_change_compact(xdfile_t *xdf, xdfile_t *xdfo, long flags); -int xdl_build_script(xdfenv_t *xe, xdchange_t **xscr); -void xdl_free_script(xdchange_t *xscr); -int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, - xdemitconf_t const *xecfg); -int xdl_do_patience_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, - xdfenv_t *env); -int xdl_do_histogram_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, - xdfenv_t *env); - -#endif /* #if !defined(XDIFFI_H) */ diff --git a/third_party/git/xdiff/xemit.c b/third_party/git/xdiff/xemit.c deleted file mode 100644 index 30713ae9a9..0000000000 --- a/third_party/git/xdiff/xemit.c +++ /dev/null @@ -1,312 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#include "xinclude.h" - -static long xdl_get_rec(xdfile_t *xdf, long ri, char const **rec) { - - *rec = xdf->recs[ri]->ptr; - - return xdf->recs[ri]->size; -} - - -static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t *ecb) { - long size, psize = strlen(pre); - char const *rec; - - size = xdl_get_rec(xdf, ri, &rec); - if (xdl_emit_diffrec(rec, size, pre, psize, ecb) < 0) { - - return -1; - } - - return 0; -} - - -/* - * Starting at the passed change atom, find the latest change atom to be included - * inside the differential hunk according to the specified configuration. - * Also advance xscr if the first changes must be discarded. - */ -xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg) -{ - xdchange_t *xch, *xchp, *lxch; - long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen; - long max_ignorable = xecfg->ctxlen; - unsigned long ignored = 0; /* number of ignored blank lines */ - - /* remove ignorable changes that are too far before other changes */ - for (xchp = *xscr; xchp && xchp->ignore; xchp = xchp->next) { - xch = xchp->next; - - if (xch == NULL || - xch->i1 - (xchp->i1 + xchp->chg1) >= max_ignorable) - *xscr = xch; - } - - if (*xscr == NULL) - return NULL; - - lxch = *xscr; - - for (xchp = *xscr, xch = xchp->next; xch; xchp = xch, xch = xch->next) { - long distance = xch->i1 - (xchp->i1 + xchp->chg1); - if (distance > max_common) - break; - - if (distance < max_ignorable && (!xch->ignore || lxch == xchp)) { - lxch = xch; - ignored = 0; - } else if (distance < max_ignorable && xch->ignore) { - ignored += xch->chg2; - } else if (lxch != xchp && - xch->i1 + ignored - (lxch->i1 + lxch->chg1) > max_common) { - break; - } else if (!xch->ignore) { - lxch = xch; - ignored = 0; - } else { - ignored += xch->chg2; - } - } - - return lxch; -} - - -static long def_ff(const char *rec, long len, char *buf, long sz, void *priv) -{ - if (len > 0 && - (isalpha((unsigned char)*rec) || /* identifier? */ - *rec == '_' || /* also identifier? */ - *rec == '$')) { /* identifiers from VMS and other esoterico */ - if (len > sz) - len = sz; - while (0 < len && isspace((unsigned char)rec[len - 1])) - len--; - memcpy(buf, rec, len); - return len; - } - return -1; -} - -static long match_func_rec(xdfile_t *xdf, xdemitconf_t const *xecfg, long ri, - char *buf, long sz) -{ - const char *rec; - long len = xdl_get_rec(xdf, ri, &rec); - if (!xecfg->find_func) - return def_ff(rec, len, buf, sz, xecfg->find_func_priv); - return xecfg->find_func(rec, len, buf, sz, xecfg->find_func_priv); -} - -static int is_func_rec(xdfile_t *xdf, xdemitconf_t const *xecfg, long ri) -{ - char dummy[1]; - return match_func_rec(xdf, xecfg, ri, dummy, sizeof(dummy)) >= 0; -} - -struct func_line { - long len; - char buf[80]; -}; - -static long get_func_line(xdfenv_t *xe, xdemitconf_t const *xecfg, - struct func_line *func_line, long start, long limit) -{ - long l, size, step = (start > limit) ? -1 : 1; - char *buf, dummy[1]; - - buf = func_line ? func_line->buf : dummy; - size = func_line ? sizeof(func_line->buf) : sizeof(dummy); - - for (l = start; l != limit && 0 <= l && l < xe->xdf1.nrec; l += step) { - long len = match_func_rec(&xe->xdf1, xecfg, l, buf, size); - if (len >= 0) { - if (func_line) - func_line->len = len; - return l; - } - } - return -1; -} - -static int is_empty_rec(xdfile_t *xdf, long ri) -{ - const char *rec; - long len = xdl_get_rec(xdf, ri, &rec); - - while (len > 0 && XDL_ISSPACE(*rec)) { - rec++; - len--; - } - return !len; -} - -int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, - xdemitconf_t const *xecfg) { - long s1, s2, e1, e2, lctx; - xdchange_t *xch, *xche; - long funclineprev = -1; - struct func_line func_line = { 0 }; - - for (xch = xscr; xch; xch = xche->next) { - xche = xdl_get_hunk(&xch, xecfg); - if (!xch) - break; - - s1 = XDL_MAX(xch->i1 - xecfg->ctxlen, 0); - s2 = XDL_MAX(xch->i2 - xecfg->ctxlen, 0); - - if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) { - long fs1, i1 = xch->i1; - - /* Appended chunk? */ - if (i1 >= xe->xdf1.nrec) { - long i2 = xch->i2; - - /* - * We don't need additional context if - * a whole function was added. - */ - while (i2 < xe->xdf2.nrec) { - if (is_func_rec(&xe->xdf2, xecfg, i2)) - goto post_context_calculation; - i2++; - } - - /* - * Otherwise get more context from the - * pre-image. - */ - i1 = xe->xdf1.nrec - 1; - } - - fs1 = get_func_line(xe, xecfg, NULL, i1, -1); - while (fs1 > 0 && !is_empty_rec(&xe->xdf1, fs1 - 1) && - !is_func_rec(&xe->xdf1, xecfg, fs1 - 1)) - fs1--; - if (fs1 < 0) - fs1 = 0; - if (fs1 < s1) { - s2 = XDL_MAX(s2 - (s1 - fs1), 0); - s1 = fs1; - } - } - - post_context_calculation: - lctx = xecfg->ctxlen; - lctx = XDL_MIN(lctx, xe->xdf1.nrec - (xche->i1 + xche->chg1)); - lctx = XDL_MIN(lctx, xe->xdf2.nrec - (xche->i2 + xche->chg2)); - - e1 = xche->i1 + xche->chg1 + lctx; - e2 = xche->i2 + xche->chg2 + lctx; - - if (xecfg->flags & XDL_EMIT_FUNCCONTEXT) { - long fe1 = get_func_line(xe, xecfg, NULL, - xche->i1 + xche->chg1, - xe->xdf1.nrec); - while (fe1 > 0 && is_empty_rec(&xe->xdf1, fe1 - 1)) - fe1--; - if (fe1 < 0) - fe1 = xe->xdf1.nrec; - if (fe1 > e1) { - e2 = XDL_MIN(e2 + (fe1 - e1), xe->xdf2.nrec); - e1 = fe1; - } - - /* - * Overlap with next change? Then include it - * in the current hunk and start over to find - * its new end. - */ - if (xche->next) { - long l = XDL_MIN(xche->next->i1, - xe->xdf1.nrec - 1); - if (l - xecfg->ctxlen <= e1 || - get_func_line(xe, xecfg, NULL, l, e1) < 0) { - xche = xche->next; - goto post_context_calculation; - } - } - } - - /* - * Emit current hunk header. - */ - - if (xecfg->flags & XDL_EMIT_FUNCNAMES) { - get_func_line(xe, xecfg, &func_line, - s1 - 1, funclineprev); - funclineprev = s1 - 1; - } - if (xdl_emit_hunk_hdr(s1 + 1, e1 - s1, s2 + 1, e2 - s2, - func_line.buf, func_line.len, ecb) < 0) - return -1; - - /* - * Emit pre-context. - */ - for (; s2 < xch->i2; s2++) - if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0) - return -1; - - for (s1 = xch->i1, s2 = xch->i2;; xch = xch->next) { - /* - * Merge previous with current change atom. - */ - for (; s1 < xch->i1 && s2 < xch->i2; s1++, s2++) - if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0) - return -1; - - /* - * Removes lines from the first file. - */ - for (s1 = xch->i1; s1 < xch->i1 + xch->chg1; s1++) - if (xdl_emit_record(&xe->xdf1, s1, "-", ecb) < 0) - return -1; - - /* - * Adds lines from the second file. - */ - for (s2 = xch->i2; s2 < xch->i2 + xch->chg2; s2++) - if (xdl_emit_record(&xe->xdf2, s2, "+", ecb) < 0) - return -1; - - if (xch == xche) - break; - s1 = xch->i1 + xch->chg1; - s2 = xch->i2 + xch->chg2; - } - - /* - * Emit post-context. - */ - for (s2 = xche->i2 + xche->chg2; s2 < e2; s2++) - if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0) - return -1; - } - - return 0; -} diff --git a/third_party/git/xdiff/xemit.h b/third_party/git/xdiff/xemit.h deleted file mode 100644 index 1b9887e670..0000000000 --- a/third_party/git/xdiff/xemit.h +++ /dev/null @@ -1,36 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#if !defined(XEMIT_H) -#define XEMIT_H - - -typedef int (*emit_func_t)(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, - xdemitconf_t const *xecfg); - -xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg); -int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, - xdemitconf_t const *xecfg); - - - -#endif /* #if !defined(XEMIT_H) */ diff --git a/third_party/git/xdiff/xhistogram.c b/third_party/git/xdiff/xhistogram.c deleted file mode 100644 index c7b35a9667..0000000000 --- a/third_party/git/xdiff/xhistogram.c +++ /dev/null @@ -1,384 +0,0 @@ -/* - * Copyright (C) 2010, Google Inc. - * and other copyright owners as documented in JGit's IP log. - * - * This program and the accompanying materials are made available - * under the terms of the Eclipse Distribution License v1.0 which - * accompanies this distribution, is reproduced below, and is - * available at http://www.eclipse.org/org/documents/edl-v10.php - * - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or - * without modification, are permitted provided that the following - * conditions are met: - * - * - Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * - Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials provided - * with the distribution. - * - * - Neither the name of the Eclipse Foundation, Inc. nor the - * names of its contributors may be used to endorse or promote - * products derived from this software without specific prior - * written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND - * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, - * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER - * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF - * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "xinclude.h" - -#define MAX_PTR UINT_MAX -#define MAX_CNT UINT_MAX - -#define LINE_END(n) (line##n + count##n - 1) -#define LINE_END_PTR(n) (*line##n + *count##n - 1) - -struct histindex { - struct record { - unsigned int ptr, cnt; - struct record *next; - } **records, /* an occurrence */ - **line_map; /* map of line to record chain */ - chastore_t rcha; - unsigned int *next_ptrs; - unsigned int table_bits, - records_size, - line_map_size; - - unsigned int max_chain_length, - key_shift, - ptr_shift; - - unsigned int cnt, - has_common; - - xdfenv_t *env; - xpparam_t const *xpp; -}; - -struct region { - unsigned int begin1, end1; - unsigned int begin2, end2; -}; - -#define LINE_MAP(i, a) (i->line_map[(a) - i->ptr_shift]) - -#define NEXT_PTR(index, ptr) \ - (index->next_ptrs[(ptr) - index->ptr_shift]) - -#define CNT(index, ptr) \ - ((LINE_MAP(index, ptr))->cnt) - -#define REC(env, s, l) \ - (env->xdf##s.recs[l - 1]) - -static int cmp_recs(xpparam_t const *xpp, - xrecord_t *r1, xrecord_t *r2) -{ - return r1->ha == r2->ha && - xdl_recmatch(r1->ptr, r1->size, r2->ptr, r2->size, - xpp->flags); -} - -#define CMP_ENV(xpp, env, s1, l1, s2, l2) \ - (cmp_recs(xpp, REC(env, s1, l1), REC(env, s2, l2))) - -#define CMP(i, s1, l1, s2, l2) \ - (cmp_recs(i->xpp, REC(i->env, s1, l1), REC(i->env, s2, l2))) - -#define TABLE_HASH(index, side, line) \ - XDL_HASHLONG((REC(index->env, side, line))->ha, index->table_bits) - -static int scanA(struct histindex *index, int line1, int count1) -{ - unsigned int ptr, tbl_idx; - unsigned int chain_len; - struct record **rec_chain, *rec; - - for (ptr = LINE_END(1); line1 <= ptr; ptr--) { - tbl_idx = TABLE_HASH(index, 1, ptr); - rec_chain = index->records + tbl_idx; - rec = *rec_chain; - - chain_len = 0; - while (rec) { - if (CMP(index, 1, rec->ptr, 1, ptr)) { - /* - * ptr is identical to another element. Insert - * it onto the front of the existing element - * chain. - */ - NEXT_PTR(index, ptr) = rec->ptr; - rec->ptr = ptr; - /* cap rec->cnt at MAX_CNT */ - rec->cnt = XDL_MIN(MAX_CNT, rec->cnt + 1); - LINE_MAP(index, ptr) = rec; - goto continue_scan; - } - - rec = rec->next; - chain_len++; - } - - if (chain_len == index->max_chain_length) - return -1; - - /* - * This is the first time we have ever seen this particular - * element in the sequence. Construct a new chain for it. - */ - if (!(rec = xdl_cha_alloc(&index->rcha))) - return -1; - rec->ptr = ptr; - rec->cnt = 1; - rec->next = *rec_chain; - *rec_chain = rec; - LINE_MAP(index, ptr) = rec; - -continue_scan: - ; /* no op */ - } - - return 0; -} - -static int try_lcs(struct histindex *index, struct region *lcs, int b_ptr, - int line1, int count1, int line2, int count2) -{ - unsigned int b_next = b_ptr + 1; - struct record *rec = index->records[TABLE_HASH(index, 2, b_ptr)]; - unsigned int as, ae, bs, be, np, rc; - int should_break; - - for (; rec; rec = rec->next) { - if (rec->cnt > index->cnt) { - if (!index->has_common) - index->has_common = CMP(index, 1, rec->ptr, 2, b_ptr); - continue; - } - - as = rec->ptr; - if (!CMP(index, 1, as, 2, b_ptr)) - continue; - - index->has_common = 1; - for (;;) { - should_break = 0; - np = NEXT_PTR(index, as); - bs = b_ptr; - ae = as; - be = bs; - rc = rec->cnt; - - while (line1 < as && line2 < bs - && CMP(index, 1, as - 1, 2, bs - 1)) { - as--; - bs--; - if (1 < rc) - rc = XDL_MIN(rc, CNT(index, as)); - } - while (ae < LINE_END(1) && be < LINE_END(2) - && CMP(index, 1, ae + 1, 2, be + 1)) { - ae++; - be++; - if (1 < rc) - rc = XDL_MIN(rc, CNT(index, ae)); - } - - if (b_next <= be) - b_next = be + 1; - if (lcs->end1 - lcs->begin1 < ae - as || rc < index->cnt) { - lcs->begin1 = as; - lcs->begin2 = bs; - lcs->end1 = ae; - lcs->end2 = be; - index->cnt = rc; - } - - if (np == 0) - break; - - while (np <= ae) { - np = NEXT_PTR(index, np); - if (np == 0) { - should_break = 1; - break; - } - } - - if (should_break) - break; - - as = np; - } - } - return b_next; -} - -static int fall_back_to_classic_diff(xpparam_t const *xpp, xdfenv_t *env, - int line1, int count1, int line2, int count2) -{ - xpparam_t xpparam; - xpparam.flags = xpp->flags & ~XDF_DIFF_ALGORITHM_MASK; - - return xdl_fall_back_diff(env, &xpparam, - line1, count1, line2, count2); -} - -static inline void free_index(struct histindex *index) -{ - xdl_free(index->records); - xdl_free(index->line_map); - xdl_free(index->next_ptrs); - xdl_cha_free(&index->rcha); -} - -static int find_lcs(xpparam_t const *xpp, xdfenv_t *env, - struct region *lcs, - int line1, int count1, int line2, int count2) -{ - int b_ptr; - int sz, ret = -1; - struct histindex index; - - memset(&index, 0, sizeof(index)); - - index.env = env; - index.xpp = xpp; - - index.records = NULL; - index.line_map = NULL; - /* in case of early xdl_cha_free() */ - index.rcha.head = NULL; - - index.table_bits = xdl_hashbits(count1); - sz = index.records_size = 1 << index.table_bits; - sz *= sizeof(struct record *); - if (!(index.records = (struct record **) xdl_malloc(sz))) - goto cleanup; - memset(index.records, 0, sz); - - sz = index.line_map_size = count1; - sz *= sizeof(struct record *); - if (!(index.line_map = (struct record **) xdl_malloc(sz))) - goto cleanup; - memset(index.line_map, 0, sz); - - sz = index.line_map_size; - sz *= sizeof(unsigned int); - if (!(index.next_ptrs = (unsigned int *) xdl_malloc(sz))) - goto cleanup; - memset(index.next_ptrs, 0, sz); - - /* lines / 4 + 1 comes from xprepare.c:xdl_prepare_ctx() */ - if (xdl_cha_init(&index.rcha, sizeof(struct record), count1 / 4 + 1) < 0) - goto cleanup; - - index.ptr_shift = line1; - index.max_chain_length = 64; - - if (scanA(&index, line1, count1)) - goto cleanup; - - index.cnt = index.max_chain_length + 1; - - for (b_ptr = line2; b_ptr <= LINE_END(2); ) - b_ptr = try_lcs(&index, lcs, b_ptr, line1, count1, line2, count2); - - if (index.has_common && index.max_chain_length < index.cnt) - ret = 1; - else - ret = 0; - -cleanup: - free_index(&index); - return ret; -} - -static int histogram_diff(xpparam_t const *xpp, xdfenv_t *env, - int line1, int count1, int line2, int count2) -{ - struct region lcs; - int lcs_found; - int result; -redo: - result = -1; - - if (count1 <= 0 && count2 <= 0) - return 0; - - if (LINE_END(1) >= MAX_PTR) - return -1; - - if (!count1) { - while(count2--) - env->xdf2.rchg[line2++ - 1] = 1; - return 0; - } else if (!count2) { - while(count1--) - env->xdf1.rchg[line1++ - 1] = 1; - return 0; - } - - memset(&lcs, 0, sizeof(lcs)); - lcs_found = find_lcs(xpp, env, &lcs, line1, count1, line2, count2); - if (lcs_found < 0) - goto out; - else if (lcs_found) - result = fall_back_to_classic_diff(xpp, env, line1, count1, line2, count2); - else { - if (lcs.begin1 == 0 && lcs.begin2 == 0) { - while (count1--) - env->xdf1.rchg[line1++ - 1] = 1; - while (count2--) - env->xdf2.rchg[line2++ - 1] = 1; - result = 0; - } else { - result = histogram_diff(xpp, env, - line1, lcs.begin1 - line1, - line2, lcs.begin2 - line2); - if (result) - goto out; - /* - * result = histogram_diff(xpp, env, - * lcs.end1 + 1, LINE_END(1) - lcs.end1, - * lcs.end2 + 1, LINE_END(2) - lcs.end2); - * but let's optimize tail recursion ourself: - */ - count1 = LINE_END(1) - lcs.end1; - line1 = lcs.end1 + 1; - count2 = LINE_END(2) - lcs.end2; - line2 = lcs.end2 + 1; - goto redo; - } - } -out: - return result; -} - -int xdl_do_histogram_diff(mmfile_t *file1, mmfile_t *file2, - xpparam_t const *xpp, xdfenv_t *env) -{ - if (xdl_prepare_env(file1, file2, xpp, env) < 0) - return -1; - - return histogram_diff(xpp, env, - env->xdf1.dstart + 1, env->xdf1.dend - env->xdf1.dstart + 1, - env->xdf2.dstart + 1, env->xdf2.dend - env->xdf2.dstart + 1); -} diff --git a/third_party/git/xdiff/xinclude.h b/third_party/git/xdiff/xinclude.h deleted file mode 100644 index a4285ac0eb..0000000000 --- a/third_party/git/xdiff/xinclude.h +++ /dev/null @@ -1,36 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#if !defined(XINCLUDE_H) -#define XINCLUDE_H - -#include "git-compat-util.h" -#include "xmacros.h" -#include "xdiff.h" -#include "xtypes.h" -#include "xutils.h" -#include "xprepare.h" -#include "xdiffi.h" -#include "xemit.h" - - -#endif /* #if !defined(XINCLUDE_H) */ diff --git a/third_party/git/xdiff/xmacros.h b/third_party/git/xdiff/xmacros.h deleted file mode 100644 index 2809a28ca9..0000000000 --- a/third_party/git/xdiff/xmacros.h +++ /dev/null @@ -1,54 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#if !defined(XMACROS_H) -#define XMACROS_H - - - - -#define XDL_MIN(a, b) ((a) < (b) ? (a): (b)) -#define XDL_MAX(a, b) ((a) > (b) ? (a): (b)) -#define XDL_ABS(v) ((v) >= 0 ? (v): -(v)) -#define XDL_ISDIGIT(c) ((c) >= '0' && (c) <= '9') -#define XDL_ISSPACE(c) (isspace((unsigned char)(c))) -#define XDL_ADDBITS(v,b) ((v) + ((v) >> (b))) -#define XDL_MASKBITS(b) ((1UL << (b)) - 1) -#define XDL_HASHLONG(v,b) (XDL_ADDBITS((unsigned long)(v), b) & XDL_MASKBITS(b)) -#define XDL_PTRFREE(p) do { if (p) { xdl_free(p); (p) = NULL; } } while (0) -#define XDL_LE32_PUT(p, v) \ -do { \ - unsigned char *__p = (unsigned char *) (p); \ - *__p++ = (unsigned char) (v); \ - *__p++ = (unsigned char) ((v) >> 8); \ - *__p++ = (unsigned char) ((v) >> 16); \ - *__p = (unsigned char) ((v) >> 24); \ -} while (0) -#define XDL_LE32_GET(p, v) \ -do { \ - unsigned char const *__p = (unsigned char const *) (p); \ - (v) = (unsigned long) __p[0] | ((unsigned long) __p[1]) << 8 | \ - ((unsigned long) __p[2]) << 16 | ((unsigned long) __p[3]) << 24; \ -} while (0) - - -#endif /* #if !defined(XMACROS_H) */ diff --git a/third_party/git/xdiff/xmerge.c b/third_party/git/xdiff/xmerge.c deleted file mode 100644 index 1659edb453..0000000000 --- a/third_party/git/xdiff/xmerge.c +++ /dev/null @@ -1,686 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003-2006 Davide Libenzi, Johannes E. Schindelin - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#include "xinclude.h" - -typedef struct s_xdmerge { - struct s_xdmerge *next; - /* - * 0 = conflict, - * 1 = no conflict, take first, - * 2 = no conflict, take second. - * 3 = no conflict, take both. - */ - int mode; - /* - * These point at the respective postimages. E.g. <i1,chg1> is - * how side #1 wants to change the common ancestor; if there is no - * overlap, lines before i1 in the postimage of side #1 appear - * in the merge result as a region touched by neither side. - */ - long i1, i2; - long chg1, chg2; - /* - * These point at the preimage; of course there is just one - * preimage, that is from the shared common ancestor. - */ - long i0; - long chg0; -} xdmerge_t; - -static int xdl_append_merge(xdmerge_t **merge, int mode, - long i0, long chg0, - long i1, long chg1, - long i2, long chg2) -{ - xdmerge_t *m = *merge; - if (m && (i1 <= m->i1 + m->chg1 || i2 <= m->i2 + m->chg2)) { - if (mode != m->mode) - m->mode = 0; - m->chg0 = i0 + chg0 - m->i0; - m->chg1 = i1 + chg1 - m->i1; - m->chg2 = i2 + chg2 - m->i2; - } else { - m = xdl_malloc(sizeof(xdmerge_t)); - if (!m) - return -1; - m->next = NULL; - m->mode = mode; - m->i0 = i0; - m->chg0 = chg0; - m->i1 = i1; - m->chg1 = chg1; - m->i2 = i2; - m->chg2 = chg2; - if (*merge) - (*merge)->next = m; - *merge = m; - } - return 0; -} - -static int xdl_cleanup_merge(xdmerge_t *c) -{ - int count = 0; - xdmerge_t *next_c; - - /* were there conflicts? */ - for (; c; c = next_c) { - if (c->mode == 0) - count++; - next_c = c->next; - free(c); - } - return count; -} - -static int xdl_merge_cmp_lines(xdfenv_t *xe1, int i1, xdfenv_t *xe2, int i2, - int line_count, long flags) -{ - int i; - xrecord_t **rec1 = xe1->xdf2.recs + i1; - xrecord_t **rec2 = xe2->xdf2.recs + i2; - - for (i = 0; i < line_count; i++) { - int result = xdl_recmatch(rec1[i]->ptr, rec1[i]->size, - rec2[i]->ptr, rec2[i]->size, flags); - if (!result) - return -1; - } - return 0; -} - -static int xdl_recs_copy_0(int use_orig, xdfenv_t *xe, int i, int count, int needs_cr, int add_nl, char *dest) -{ - xrecord_t **recs; - int size = 0; - - recs = (use_orig ? xe->xdf1.recs : xe->xdf2.recs) + i; - - if (count < 1) - return 0; - - for (i = 0; i < count; size += recs[i++]->size) - if (dest) - memcpy(dest + size, recs[i]->ptr, recs[i]->size); - if (add_nl) { - i = recs[count - 1]->size; - if (i == 0 || recs[count - 1]->ptr[i - 1] != '\n') { - if (needs_cr) { - if (dest) - dest[size] = '\r'; - size++; - } - - if (dest) - dest[size] = '\n'; - size++; - } - } - return size; -} - -static int xdl_recs_copy(xdfenv_t *xe, int i, int count, int needs_cr, int add_nl, char *dest) -{ - return xdl_recs_copy_0(0, xe, i, count, needs_cr, add_nl, dest); -} - -static int xdl_orig_copy(xdfenv_t *xe, int i, int count, int needs_cr, int add_nl, char *dest) -{ - return xdl_recs_copy_0(1, xe, i, count, needs_cr, add_nl, dest); -} - -/* - * Returns 1 if the i'th line ends in CR/LF (if it is the last line and - * has no eol, the preceding line, if any), 0 if it ends in LF-only, and - * -1 if the line ending cannot be determined. - */ -static int is_eol_crlf(xdfile_t *file, int i) -{ - long size; - - if (i < file->nrec - 1) - /* All lines before the last *must* end in LF */ - return (size = file->recs[i]->size) > 1 && - file->recs[i]->ptr[size - 2] == '\r'; - if (!file->nrec) - /* Cannot determine eol style from empty file */ - return -1; - if ((size = file->recs[i]->size) && - file->recs[i]->ptr[size - 1] == '\n') - /* Last line; ends in LF; Is it CR/LF? */ - return size > 1 && - file->recs[i]->ptr[size - 2] == '\r'; - if (!i) - /* The only line has no eol */ - return -1; - /* Determine eol from second-to-last line */ - return (size = file->recs[i - 1]->size) > 1 && - file->recs[i - 1]->ptr[size - 2] == '\r'; -} - -static int is_cr_needed(xdfenv_t *xe1, xdfenv_t *xe2, xdmerge_t *m) -{ - int needs_cr; - - /* Match post-images' preceding, or first, lines' end-of-line style */ - needs_cr = is_eol_crlf(&xe1->xdf2, m->i1 ? m->i1 - 1 : 0); - if (needs_cr) - needs_cr = is_eol_crlf(&xe2->xdf2, m->i2 ? m->i2 - 1 : 0); - /* Look at pre-image's first line, unless we already settled on LF */ - if (needs_cr) - needs_cr = is_eol_crlf(&xe1->xdf1, 0); - /* If still undecided, use LF-only */ - return needs_cr < 0 ? 0 : needs_cr; -} - -static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1, - xdfenv_t *xe2, const char *name2, - const char *name3, - int size, int i, int style, - xdmerge_t *m, char *dest, int marker_size) -{ - int marker1_size = (name1 ? strlen(name1) + 1 : 0); - int marker2_size = (name2 ? strlen(name2) + 1 : 0); - int marker3_size = (name3 ? strlen(name3) + 1 : 0); - int needs_cr = is_cr_needed(xe1, xe2, m); - - if (marker_size <= 0) - marker_size = DEFAULT_CONFLICT_MARKER_SIZE; - - /* Before conflicting part */ - size += xdl_recs_copy(xe1, i, m->i1 - i, 0, 0, - dest ? dest + size : NULL); - - if (!dest) { - size += marker_size + 1 + needs_cr + marker1_size; - } else { - memset(dest + size, '<', marker_size); - size += marker_size; - if (marker1_size) { - dest[size] = ' '; - memcpy(dest + size + 1, name1, marker1_size - 1); - size += marker1_size; - } - if (needs_cr) - dest[size++] = '\r'; - dest[size++] = '\n'; - } - - /* Postimage from side #1 */ - size += xdl_recs_copy(xe1, m->i1, m->chg1, needs_cr, 1, - dest ? dest + size : NULL); - - if (style == XDL_MERGE_DIFF3) { - /* Shared preimage */ - if (!dest) { - size += marker_size + 1 + needs_cr + marker3_size; - } else { - memset(dest + size, '|', marker_size); - size += marker_size; - if (marker3_size) { - dest[size] = ' '; - memcpy(dest + size + 1, name3, marker3_size - 1); - size += marker3_size; - } - if (needs_cr) - dest[size++] = '\r'; - dest[size++] = '\n'; - } - size += xdl_orig_copy(xe1, m->i0, m->chg0, needs_cr, 1, - dest ? dest + size : NULL); - } - - if (!dest) { - size += marker_size + 1 + needs_cr; - } else { - memset(dest + size, '=', marker_size); - size += marker_size; - if (needs_cr) - dest[size++] = '\r'; - dest[size++] = '\n'; - } - - /* Postimage from side #2 */ - size += xdl_recs_copy(xe2, m->i2, m->chg2, needs_cr, 1, - dest ? dest + size : NULL); - if (!dest) { - size += marker_size + 1 + needs_cr + marker2_size; - } else { - memset(dest + size, '>', marker_size); - size += marker_size; - if (marker2_size) { - dest[size] = ' '; - memcpy(dest + size + 1, name2, marker2_size - 1); - size += marker2_size; - } - if (needs_cr) - dest[size++] = '\r'; - dest[size++] = '\n'; - } - return size; -} - -static int xdl_fill_merge_buffer(xdfenv_t *xe1, const char *name1, - xdfenv_t *xe2, const char *name2, - const char *ancestor_name, - int favor, - xdmerge_t *m, char *dest, int style, - int marker_size) -{ - int size, i; - - for (size = i = 0; m; m = m->next) { - if (favor && !m->mode) - m->mode = favor; - - if (m->mode == 0) - size = fill_conflict_hunk(xe1, name1, xe2, name2, - ancestor_name, - size, i, style, m, dest, - marker_size); - else if (m->mode & 3) { - /* Before conflicting part */ - size += xdl_recs_copy(xe1, i, m->i1 - i, 0, 0, - dest ? dest + size : NULL); - /* Postimage from side #1 */ - if (m->mode & 1) { - int needs_cr = is_cr_needed(xe1, xe2, m); - - size += xdl_recs_copy(xe1, m->i1, m->chg1, needs_cr, (m->mode & 2), - dest ? dest + size : NULL); - } - /* Postimage from side #2 */ - if (m->mode & 2) - size += xdl_recs_copy(xe2, m->i2, m->chg2, 0, 0, - dest ? dest + size : NULL); - } else - continue; - i = m->i1 + m->chg1; - } - size += xdl_recs_copy(xe1, i, xe1->xdf2.nrec - i, 0, 0, - dest ? dest + size : NULL); - return size; -} - -/* - * Sometimes, changes are not quite identical, but differ in only a few - * lines. Try hard to show only these few lines as conflicting. - */ -static int xdl_refine_conflicts(xdfenv_t *xe1, xdfenv_t *xe2, xdmerge_t *m, - xpparam_t const *xpp) -{ - for (; m; m = m->next) { - mmfile_t t1, t2; - xdfenv_t xe; - xdchange_t *xscr, *x; - int i1 = m->i1, i2 = m->i2; - - /* let's handle just the conflicts */ - if (m->mode) - continue; - - /* no sense refining a conflict when one side is empty */ - if (m->chg1 == 0 || m->chg2 == 0) - continue; - - /* - * This probably does not work outside git, since - * we have a very simple mmfile structure. - */ - t1.ptr = (char *)xe1->xdf2.recs[m->i1]->ptr; - t1.size = xe1->xdf2.recs[m->i1 + m->chg1 - 1]->ptr - + xe1->xdf2.recs[m->i1 + m->chg1 - 1]->size - t1.ptr; - t2.ptr = (char *)xe2->xdf2.recs[m->i2]->ptr; - t2.size = xe2->xdf2.recs[m->i2 + m->chg2 - 1]->ptr - + xe2->xdf2.recs[m->i2 + m->chg2 - 1]->size - t2.ptr; - if (xdl_do_diff(&t1, &t2, xpp, &xe) < 0) - return -1; - if (xdl_change_compact(&xe.xdf1, &xe.xdf2, xpp->flags) < 0 || - xdl_change_compact(&xe.xdf2, &xe.xdf1, xpp->flags) < 0 || - xdl_build_script(&xe, &xscr) < 0) { - xdl_free_env(&xe); - return -1; - } - if (!xscr) { - /* If this happens, the changes are identical. */ - xdl_free_env(&xe); - m->mode = 4; - continue; - } - x = xscr; - m->i1 = xscr->i1 + i1; - m->chg1 = xscr->chg1; - m->i2 = xscr->i2 + i2; - m->chg2 = xscr->chg2; - while (xscr->next) { - xdmerge_t *m2 = xdl_malloc(sizeof(xdmerge_t)); - if (!m2) { - xdl_free_env(&xe); - xdl_free_script(x); - return -1; - } - xscr = xscr->next; - m2->next = m->next; - m->next = m2; - m = m2; - m->mode = 0; - m->i1 = xscr->i1 + i1; - m->chg1 = xscr->chg1; - m->i2 = xscr->i2 + i2; - m->chg2 = xscr->chg2; - } - xdl_free_env(&xe); - xdl_free_script(x); - } - return 0; -} - -static int line_contains_alnum(const char *ptr, long size) -{ - while (size--) - if (isalnum((unsigned char)*(ptr++))) - return 1; - return 0; -} - -static int lines_contain_alnum(xdfenv_t *xe, int i, int chg) -{ - for (; chg; chg--, i++) - if (line_contains_alnum(xe->xdf2.recs[i]->ptr, - xe->xdf2.recs[i]->size)) - return 1; - return 0; -} - -/* - * This function merges m and m->next, marking everything between those hunks - * as conflicting, too. - */ -static void xdl_merge_two_conflicts(xdmerge_t *m) -{ - xdmerge_t *next_m = m->next; - m->chg1 = next_m->i1 + next_m->chg1 - m->i1; - m->chg2 = next_m->i2 + next_m->chg2 - m->i2; - m->next = next_m->next; - free(next_m); -} - -/* - * If there are less than 3 non-conflicting lines between conflicts, - * it appears simpler -- because it takes up less (or as many) lines -- - * if the lines are moved into the conflicts. - */ -static int xdl_simplify_non_conflicts(xdfenv_t *xe1, xdmerge_t *m, - int simplify_if_no_alnum) -{ - int result = 0; - - if (!m) - return result; - for (;;) { - xdmerge_t *next_m = m->next; - int begin, end; - - if (!next_m) - return result; - - begin = m->i1 + m->chg1; - end = next_m->i1; - - if (m->mode != 0 || next_m->mode != 0 || - (end - begin > 3 && - (!simplify_if_no_alnum || - lines_contain_alnum(xe1, begin, end - begin)))) { - m = next_m; - } else { - result++; - xdl_merge_two_conflicts(m); - } - } -} - -/* - * level == 0: mark all overlapping changes as conflict - * level == 1: mark overlapping changes as conflict only if not identical - * level == 2: analyze non-identical changes for minimal conflict set - * level == 3: analyze non-identical changes for minimal conflict set, but - * treat hunks not containing any letter or number as conflicting - * - * returns < 0 on error, == 0 for no conflicts, else number of conflicts - */ -static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1, - xdfenv_t *xe2, xdchange_t *xscr2, - xmparam_t const *xmp, mmbuffer_t *result) -{ - xdmerge_t *changes, *c; - xpparam_t const *xpp = &xmp->xpp; - const char *const ancestor_name = xmp->ancestor; - const char *const name1 = xmp->file1; - const char *const name2 = xmp->file2; - int i0, i1, i2, chg0, chg1, chg2; - int level = xmp->level; - int style = xmp->style; - int favor = xmp->favor; - - if (style == XDL_MERGE_DIFF3) { - /* - * "diff3 -m" output does not make sense for anything - * more aggressive than XDL_MERGE_EAGER. - */ - if (XDL_MERGE_EAGER < level) - level = XDL_MERGE_EAGER; - } - - c = changes = NULL; - - while (xscr1 && xscr2) { - if (!changes) - changes = c; - if (xscr1->i1 + xscr1->chg1 < xscr2->i1) { - i0 = xscr1->i1; - i1 = xscr1->i2; - i2 = xscr2->i2 - xscr2->i1 + xscr1->i1; - chg0 = xscr1->chg1; - chg1 = xscr1->chg2; - chg2 = xscr1->chg1; - if (xdl_append_merge(&c, 1, - i0, chg0, i1, chg1, i2, chg2)) { - xdl_cleanup_merge(changes); - return -1; - } - xscr1 = xscr1->next; - continue; - } - if (xscr2->i1 + xscr2->chg1 < xscr1->i1) { - i0 = xscr2->i1; - i1 = xscr1->i2 - xscr1->i1 + xscr2->i1; - i2 = xscr2->i2; - chg0 = xscr2->chg1; - chg1 = xscr2->chg1; - chg2 = xscr2->chg2; - if (xdl_append_merge(&c, 2, - i0, chg0, i1, chg1, i2, chg2)) { - xdl_cleanup_merge(changes); - return -1; - } - xscr2 = xscr2->next; - continue; - } - if (level == XDL_MERGE_MINIMAL || xscr1->i1 != xscr2->i1 || - xscr1->chg1 != xscr2->chg1 || - xscr1->chg2 != xscr2->chg2 || - xdl_merge_cmp_lines(xe1, xscr1->i2, - xe2, xscr2->i2, - xscr1->chg2, xpp->flags)) { - /* conflict */ - int off = xscr1->i1 - xscr2->i1; - int ffo = off + xscr1->chg1 - xscr2->chg1; - - i0 = xscr1->i1; - i1 = xscr1->i2; - i2 = xscr2->i2; - if (off > 0) { - i0 -= off; - i1 -= off; - } - else - i2 += off; - chg0 = xscr1->i1 + xscr1->chg1 - i0; - chg1 = xscr1->i2 + xscr1->chg2 - i1; - chg2 = xscr2->i2 + xscr2->chg2 - i2; - if (ffo < 0) { - chg0 -= ffo; - chg1 -= ffo; - } else - chg2 += ffo; - if (xdl_append_merge(&c, 0, - i0, chg0, i1, chg1, i2, chg2)) { - xdl_cleanup_merge(changes); - return -1; - } - } - - i1 = xscr1->i1 + xscr1->chg1; - i2 = xscr2->i1 + xscr2->chg1; - - if (i1 >= i2) - xscr2 = xscr2->next; - if (i2 >= i1) - xscr1 = xscr1->next; - } - while (xscr1) { - if (!changes) - changes = c; - i0 = xscr1->i1; - i1 = xscr1->i2; - i2 = xscr1->i1 + xe2->xdf2.nrec - xe2->xdf1.nrec; - chg0 = xscr1->chg1; - chg1 = xscr1->chg2; - chg2 = xscr1->chg1; - if (xdl_append_merge(&c, 1, - i0, chg0, i1, chg1, i2, chg2)) { - xdl_cleanup_merge(changes); - return -1; - } - xscr1 = xscr1->next; - } - while (xscr2) { - if (!changes) - changes = c; - i0 = xscr2->i1; - i1 = xscr2->i1 + xe1->xdf2.nrec - xe1->xdf1.nrec; - i2 = xscr2->i2; - chg0 = xscr2->chg1; - chg1 = xscr2->chg1; - chg2 = xscr2->chg2; - if (xdl_append_merge(&c, 2, - i0, chg0, i1, chg1, i2, chg2)) { - xdl_cleanup_merge(changes); - return -1; - } - xscr2 = xscr2->next; - } - if (!changes) - changes = c; - /* refine conflicts */ - if (XDL_MERGE_ZEALOUS <= level && - (xdl_refine_conflicts(xe1, xe2, changes, xpp) < 0 || - xdl_simplify_non_conflicts(xe1, changes, - XDL_MERGE_ZEALOUS < level) < 0)) { - xdl_cleanup_merge(changes); - return -1; - } - /* output */ - if (result) { - int marker_size = xmp->marker_size; - int size = xdl_fill_merge_buffer(xe1, name1, xe2, name2, - ancestor_name, - favor, changes, NULL, style, - marker_size); - result->ptr = xdl_malloc(size); - if (!result->ptr) { - xdl_cleanup_merge(changes); - return -1; - } - result->size = size; - xdl_fill_merge_buffer(xe1, name1, xe2, name2, - ancestor_name, favor, changes, - result->ptr, style, marker_size); - } - return xdl_cleanup_merge(changes); -} - -int xdl_merge(mmfile_t *orig, mmfile_t *mf1, mmfile_t *mf2, - xmparam_t const *xmp, mmbuffer_t *result) -{ - xdchange_t *xscr1, *xscr2; - xdfenv_t xe1, xe2; - int status; - xpparam_t const *xpp = &xmp->xpp; - - result->ptr = NULL; - result->size = 0; - - if (xdl_do_diff(orig, mf1, xpp, &xe1) < 0) { - return -1; - } - if (xdl_do_diff(orig, mf2, xpp, &xe2) < 0) { - xdl_free_env(&xe1); - return -1; - } - if (xdl_change_compact(&xe1.xdf1, &xe1.xdf2, xpp->flags) < 0 || - xdl_change_compact(&xe1.xdf2, &xe1.xdf1, xpp->flags) < 0 || - xdl_build_script(&xe1, &xscr1) < 0) { - xdl_free_env(&xe1); - return -1; - } - if (xdl_change_compact(&xe2.xdf1, &xe2.xdf2, xpp->flags) < 0 || - xdl_change_compact(&xe2.xdf2, &xe2.xdf1, xpp->flags) < 0 || - xdl_build_script(&xe2, &xscr2) < 0) { - xdl_free_script(xscr1); - xdl_free_env(&xe1); - xdl_free_env(&xe2); - return -1; - } - status = 0; - if (!xscr1) { - result->ptr = xdl_malloc(mf2->size); - memcpy(result->ptr, mf2->ptr, mf2->size); - result->size = mf2->size; - } else if (!xscr2) { - result->ptr = xdl_malloc(mf1->size); - memcpy(result->ptr, mf1->ptr, mf1->size); - result->size = mf1->size; - } else { - status = xdl_do_merge(&xe1, xscr1, - &xe2, xscr2, - xmp, result); - } - xdl_free_script(xscr1); - xdl_free_script(xscr2); - - xdl_free_env(&xe1); - xdl_free_env(&xe2); - - return status; -} diff --git a/third_party/git/xdiff/xpatience.c b/third_party/git/xdiff/xpatience.c deleted file mode 100644 index 3c5601b602..0000000000 --- a/third_party/git/xdiff/xpatience.c +++ /dev/null @@ -1,388 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003-2016 Davide Libenzi, Johannes E. Schindelin - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ -#include "xinclude.h" - -/* - * The basic idea of patience diff is to find lines that are unique in - * both files. These are intuitively the ones that we want to see as - * common lines. - * - * The maximal ordered sequence of such line pairs (where ordered means - * that the order in the sequence agrees with the order of the lines in - * both files) naturally defines an initial set of common lines. - * - * Now, the algorithm tries to extend the set of common lines by growing - * the line ranges where the files have identical lines. - * - * Between those common lines, the patience diff algorithm is applied - * recursively, until no unique line pairs can be found; these line ranges - * are handled by the well-known Myers algorithm. - */ - -#define NON_UNIQUE ULONG_MAX - -/* - * This is a hash mapping from line hash to line numbers in the first and - * second file. - */ -struct hashmap { - int nr, alloc; - struct entry { - unsigned long hash; - /* - * 0 = unused entry, 1 = first line, 2 = second, etc. - * line2 is NON_UNIQUE if the line is not unique - * in either the first or the second file. - */ - unsigned long line1, line2; - /* - * "next" & "previous" are used for the longest common - * sequence; - * initially, "next" reflects only the order in file1. - */ - struct entry *next, *previous; - - /* - * If 1, this entry can serve as an anchor. See - * Documentation/diff-options.txt for more information. - */ - unsigned anchor : 1; - } *entries, *first, *last; - /* were common records found? */ - unsigned long has_matches; - mmfile_t *file1, *file2; - xdfenv_t *env; - xpparam_t const *xpp; -}; - -static int is_anchor(xpparam_t const *xpp, const char *line) -{ - int i; - for (i = 0; i < xpp->anchors_nr; i++) { - if (!strncmp(line, xpp->anchors[i], strlen(xpp->anchors[i]))) - return 1; - } - return 0; -} - -/* The argument "pass" is 1 for the first file, 2 for the second. */ -static void insert_record(xpparam_t const *xpp, int line, struct hashmap *map, - int pass) -{ - xrecord_t **records = pass == 1 ? - map->env->xdf1.recs : map->env->xdf2.recs; - xrecord_t *record = records[line - 1], *other; - /* - * After xdl_prepare_env() (or more precisely, due to - * xdl_classify_record()), the "ha" member of the records (AKA lines) - * is _not_ the hash anymore, but a linearized version of it. In - * other words, the "ha" member is guaranteed to start with 0 and - * the second record's ha can only be 0 or 1, etc. - * - * So we multiply ha by 2 in the hope that the hashing was - * "unique enough". - */ - int index = (int)((record->ha << 1) % map->alloc); - - while (map->entries[index].line1) { - other = map->env->xdf1.recs[map->entries[index].line1 - 1]; - if (map->entries[index].hash != record->ha || - !xdl_recmatch(record->ptr, record->size, - other->ptr, other->size, - map->xpp->flags)) { - if (++index >= map->alloc) - index = 0; - continue; - } - if (pass == 2) - map->has_matches = 1; - if (pass == 1 || map->entries[index].line2) - map->entries[index].line2 = NON_UNIQUE; - else - map->entries[index].line2 = line; - return; - } - if (pass == 2) - return; - map->entries[index].line1 = line; - map->entries[index].hash = record->ha; - map->entries[index].anchor = is_anchor(xpp, map->env->xdf1.recs[line - 1]->ptr); - if (!map->first) - map->first = map->entries + index; - if (map->last) { - map->last->next = map->entries + index; - map->entries[index].previous = map->last; - } - map->last = map->entries + index; - map->nr++; -} - -/* - * This function has to be called for each recursion into the inter-hunk - * parts, as previously non-unique lines can become unique when being - * restricted to a smaller part of the files. - * - * It is assumed that env has been prepared using xdl_prepare(). - */ -static int fill_hashmap(mmfile_t *file1, mmfile_t *file2, - xpparam_t const *xpp, xdfenv_t *env, - struct hashmap *result, - int line1, int count1, int line2, int count2) -{ - result->file1 = file1; - result->file2 = file2; - result->xpp = xpp; - result->env = env; - - /* We know exactly how large we want the hash map */ - result->alloc = count1 * 2; - result->entries = (struct entry *) - xdl_malloc(result->alloc * sizeof(struct entry)); - if (!result->entries) - return -1; - memset(result->entries, 0, result->alloc * sizeof(struct entry)); - - /* First, fill with entries from the first file */ - while (count1--) - insert_record(xpp, line1++, result, 1); - - /* Then search for matches in the second file */ - while (count2--) - insert_record(xpp, line2++, result, 2); - - return 0; -} - -/* - * Find the longest sequence with a smaller last element (meaning a smaller - * line2, as we construct the sequence with entries ordered by line1). - */ -static int binary_search(struct entry **sequence, int longest, - struct entry *entry) -{ - int left = -1, right = longest; - - while (left + 1 < right) { - int middle = left + (right - left) / 2; - /* by construction, no two entries can be equal */ - if (sequence[middle]->line2 > entry->line2) - right = middle; - else - left = middle; - } - /* return the index in "sequence", _not_ the sequence length */ - return left; -} - -/* - * The idea is to start with the list of common unique lines sorted by - * the order in file1. For each of these pairs, the longest (partial) - * sequence whose last element's line2 is smaller is determined. - * - * For efficiency, the sequences are kept in a list containing exactly one - * item per sequence length: the sequence with the smallest last - * element (in terms of line2). - */ -static struct entry *find_longest_common_sequence(struct hashmap *map) -{ - struct entry **sequence = xdl_malloc(map->nr * sizeof(struct entry *)); - int longest = 0, i; - struct entry *entry; - - /* - * If not -1, this entry in sequence must never be overridden. - * Therefore, overriding entries before this has no effect, so - * do not do that either. - */ - int anchor_i = -1; - - for (entry = map->first; entry; entry = entry->next) { - if (!entry->line2 || entry->line2 == NON_UNIQUE) - continue; - i = binary_search(sequence, longest, entry); - entry->previous = i < 0 ? NULL : sequence[i]; - ++i; - if (i <= anchor_i) - continue; - sequence[i] = entry; - if (entry->anchor) { - anchor_i = i; - longest = anchor_i + 1; - } else if (i == longest) { - longest++; - } - } - - /* No common unique lines were found */ - if (!longest) { - xdl_free(sequence); - return NULL; - } - - /* Iterate starting at the last element, adjusting the "next" members */ - entry = sequence[longest - 1]; - entry->next = NULL; - while (entry->previous) { - entry->previous->next = entry; - entry = entry->previous; - } - xdl_free(sequence); - return entry; -} - -static int match(struct hashmap *map, int line1, int line2) -{ - xrecord_t *record1 = map->env->xdf1.recs[line1 - 1]; - xrecord_t *record2 = map->env->xdf2.recs[line2 - 1]; - return xdl_recmatch(record1->ptr, record1->size, - record2->ptr, record2->size, map->xpp->flags); -} - -static int patience_diff(mmfile_t *file1, mmfile_t *file2, - xpparam_t const *xpp, xdfenv_t *env, - int line1, int count1, int line2, int count2); - -static int walk_common_sequence(struct hashmap *map, struct entry *first, - int line1, int count1, int line2, int count2) -{ - int end1 = line1 + count1, end2 = line2 + count2; - int next1, next2; - - for (;;) { - /* Try to grow the line ranges of common lines */ - if (first) { - next1 = first->line1; - next2 = first->line2; - while (next1 > line1 && next2 > line2 && - match(map, next1 - 1, next2 - 1)) { - next1--; - next2--; - } - } else { - next1 = end1; - next2 = end2; - } - while (line1 < next1 && line2 < next2 && - match(map, line1, line2)) { - line1++; - line2++; - } - - /* Recurse */ - if (next1 > line1 || next2 > line2) { - struct hashmap submap; - - memset(&submap, 0, sizeof(submap)); - if (patience_diff(map->file1, map->file2, - map->xpp, map->env, - line1, next1 - line1, - line2, next2 - line2)) - return -1; - } - - if (!first) - return 0; - - while (first->next && - first->next->line1 == first->line1 + 1 && - first->next->line2 == first->line2 + 1) - first = first->next; - - line1 = first->line1 + 1; - line2 = first->line2 + 1; - - first = first->next; - } -} - -static int fall_back_to_classic_diff(struct hashmap *map, - int line1, int count1, int line2, int count2) -{ - xpparam_t xpp; - xpp.flags = map->xpp->flags & ~XDF_DIFF_ALGORITHM_MASK; - - return xdl_fall_back_diff(map->env, &xpp, - line1, count1, line2, count2); -} - -/* - * Recursively find the longest common sequence of unique lines, - * and if none was found, ask xdl_do_diff() to do the job. - * - * This function assumes that env was prepared with xdl_prepare_env(). - */ -static int patience_diff(mmfile_t *file1, mmfile_t *file2, - xpparam_t const *xpp, xdfenv_t *env, - int line1, int count1, int line2, int count2) -{ - struct hashmap map; - struct entry *first; - int result = 0; - - /* trivial case: one side is empty */ - if (!count1) { - while(count2--) - env->xdf2.rchg[line2++ - 1] = 1; - return 0; - } else if (!count2) { - while(count1--) - env->xdf1.rchg[line1++ - 1] = 1; - return 0; - } - - memset(&map, 0, sizeof(map)); - if (fill_hashmap(file1, file2, xpp, env, &map, - line1, count1, line2, count2)) - return -1; - - /* are there any matching lines at all? */ - if (!map.has_matches) { - while(count1--) - env->xdf1.rchg[line1++ - 1] = 1; - while(count2--) - env->xdf2.rchg[line2++ - 1] = 1; - xdl_free(map.entries); - return 0; - } - - first = find_longest_common_sequence(&map); - if (first) - result = walk_common_sequence(&map, first, - line1, count1, line2, count2); - else - result = fall_back_to_classic_diff(&map, - line1, count1, line2, count2); - - xdl_free(map.entries); - return result; -} - -int xdl_do_patience_diff(mmfile_t *file1, mmfile_t *file2, - xpparam_t const *xpp, xdfenv_t *env) -{ - if (xdl_prepare_env(file1, file2, xpp, env) < 0) - return -1; - - /* environment is cleaned up in xdl_diff() */ - return patience_diff(file1, file2, xpp, env, - 1, env->xdf1.nrec, 1, env->xdf2.nrec); -} diff --git a/third_party/git/xdiff/xprepare.c b/third_party/git/xdiff/xprepare.c deleted file mode 100644 index abeb8fb84e..0000000000 --- a/third_party/git/xdiff/xprepare.c +++ /dev/null @@ -1,483 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#include "xinclude.h" - - -#define XDL_KPDIS_RUN 4 -#define XDL_MAX_EQLIMIT 1024 -#define XDL_SIMSCAN_WINDOW 100 -#define XDL_GUESS_NLINES1 256 -#define XDL_GUESS_NLINES2 20 - - -typedef struct s_xdlclass { - struct s_xdlclass *next; - unsigned long ha; - char const *line; - long size; - long idx; - long len1, len2; -} xdlclass_t; - -typedef struct s_xdlclassifier { - unsigned int hbits; - long hsize; - xdlclass_t **rchash; - chastore_t ncha; - xdlclass_t **rcrecs; - long alloc; - long count; - long flags; -} xdlclassifier_t; - - - - -static int xdl_init_classifier(xdlclassifier_t *cf, long size, long flags); -static void xdl_free_classifier(xdlclassifier_t *cf); -static int xdl_classify_record(unsigned int pass, xdlclassifier_t *cf, xrecord_t **rhash, - unsigned int hbits, xrecord_t *rec); -static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_t const *xpp, - xdlclassifier_t *cf, xdfile_t *xdf); -static void xdl_free_ctx(xdfile_t *xdf); -static int xdl_clean_mmatch(char const *dis, long i, long s, long e); -static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2); -static int xdl_trim_ends(xdfile_t *xdf1, xdfile_t *xdf2); -static int xdl_optimize_ctxs(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2); - - - - -static int xdl_init_classifier(xdlclassifier_t *cf, long size, long flags) { - cf->flags = flags; - - cf->hbits = xdl_hashbits((unsigned int) size); - cf->hsize = 1 << cf->hbits; - - if (xdl_cha_init(&cf->ncha, sizeof(xdlclass_t), size / 4 + 1) < 0) { - - return -1; - } - if (!(cf->rchash = (xdlclass_t **) xdl_malloc(cf->hsize * sizeof(xdlclass_t *)))) { - - xdl_cha_free(&cf->ncha); - return -1; - } - memset(cf->rchash, 0, cf->hsize * sizeof(xdlclass_t *)); - - cf->alloc = size; - if (!(cf->rcrecs = (xdlclass_t **) xdl_malloc(cf->alloc * sizeof(xdlclass_t *)))) { - - xdl_free(cf->rchash); - xdl_cha_free(&cf->ncha); - return -1; - } - - cf->count = 0; - - return 0; -} - - -static void xdl_free_classifier(xdlclassifier_t *cf) { - - xdl_free(cf->rcrecs); - xdl_free(cf->rchash); - xdl_cha_free(&cf->ncha); -} - - -static int xdl_classify_record(unsigned int pass, xdlclassifier_t *cf, xrecord_t **rhash, - unsigned int hbits, xrecord_t *rec) { - long hi; - char const *line; - xdlclass_t *rcrec; - xdlclass_t **rcrecs; - - line = rec->ptr; - hi = (long) XDL_HASHLONG(rec->ha, cf->hbits); - for (rcrec = cf->rchash[hi]; rcrec; rcrec = rcrec->next) - if (rcrec->ha == rec->ha && - xdl_recmatch(rcrec->line, rcrec->size, - rec->ptr, rec->size, cf->flags)) - break; - - if (!rcrec) { - if (!(rcrec = xdl_cha_alloc(&cf->ncha))) { - - return -1; - } - rcrec->idx = cf->count++; - if (cf->count > cf->alloc) { - cf->alloc *= 2; - if (!(rcrecs = (xdlclass_t **) xdl_realloc(cf->rcrecs, cf->alloc * sizeof(xdlclass_t *)))) { - - return -1; - } - cf->rcrecs = rcrecs; - } - cf->rcrecs[rcrec->idx] = rcrec; - rcrec->line = line; - rcrec->size = rec->size; - rcrec->ha = rec->ha; - rcrec->len1 = rcrec->len2 = 0; - rcrec->next = cf->rchash[hi]; - cf->rchash[hi] = rcrec; - } - - (pass == 1) ? rcrec->len1++ : rcrec->len2++; - - rec->ha = (unsigned long) rcrec->idx; - - hi = (long) XDL_HASHLONG(rec->ha, hbits); - rec->next = rhash[hi]; - rhash[hi] = rec; - - return 0; -} - - -static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_t const *xpp, - xdlclassifier_t *cf, xdfile_t *xdf) { - unsigned int hbits; - long nrec, hsize, bsize; - unsigned long hav; - char const *blk, *cur, *top, *prev; - xrecord_t *crec; - xrecord_t **recs, **rrecs; - xrecord_t **rhash; - unsigned long *ha; - char *rchg; - long *rindex; - - ha = NULL; - rindex = NULL; - rchg = NULL; - rhash = NULL; - recs = NULL; - - if (xdl_cha_init(&xdf->rcha, sizeof(xrecord_t), narec / 4 + 1) < 0) - goto abort; - if (!(recs = (xrecord_t **) xdl_malloc(narec * sizeof(xrecord_t *)))) - goto abort; - - if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF) - hbits = hsize = 0; - else { - hbits = xdl_hashbits((unsigned int) narec); - hsize = 1 << hbits; - if (!(rhash = (xrecord_t **) xdl_malloc(hsize * sizeof(xrecord_t *)))) - goto abort; - memset(rhash, 0, hsize * sizeof(xrecord_t *)); - } - - nrec = 0; - if ((cur = blk = xdl_mmfile_first(mf, &bsize)) != NULL) { - for (top = blk + bsize; cur < top; ) { - prev = cur; - hav = xdl_hash_record(&cur, top, xpp->flags); - if (nrec >= narec) { - narec *= 2; - if (!(rrecs = (xrecord_t **) xdl_realloc(recs, narec * sizeof(xrecord_t *)))) - goto abort; - recs = rrecs; - } - if (!(crec = xdl_cha_alloc(&xdf->rcha))) - goto abort; - crec->ptr = prev; - crec->size = (long) (cur - prev); - crec->ha = hav; - recs[nrec++] = crec; - - if ((XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) && - xdl_classify_record(pass, cf, rhash, hbits, crec) < 0) - goto abort; - } - } - - if (!(rchg = (char *) xdl_malloc((nrec + 2) * sizeof(char)))) - goto abort; - memset(rchg, 0, (nrec + 2) * sizeof(char)); - - if (!(rindex = (long *) xdl_malloc((nrec + 1) * sizeof(long)))) - goto abort; - if (!(ha = (unsigned long *) xdl_malloc((nrec + 1) * sizeof(unsigned long)))) - goto abort; - - xdf->nrec = nrec; - xdf->recs = recs; - xdf->hbits = hbits; - xdf->rhash = rhash; - xdf->rchg = rchg + 1; - xdf->rindex = rindex; - xdf->nreff = 0; - xdf->ha = ha; - xdf->dstart = 0; - xdf->dend = nrec - 1; - - return 0; - -abort: - xdl_free(ha); - xdl_free(rindex); - xdl_free(rchg); - xdl_free(rhash); - xdl_free(recs); - xdl_cha_free(&xdf->rcha); - return -1; -} - - -static void xdl_free_ctx(xdfile_t *xdf) { - - xdl_free(xdf->rhash); - xdl_free(xdf->rindex); - xdl_free(xdf->rchg - 1); - xdl_free(xdf->ha); - xdl_free(xdf->recs); - xdl_cha_free(&xdf->rcha); -} - - -int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, - xdfenv_t *xe) { - long enl1, enl2, sample; - xdlclassifier_t cf; - - memset(&cf, 0, sizeof(cf)); - - /* - * For histogram diff, we can afford a smaller sample size and - * thus a poorer estimate of the number of lines, as the hash - * table (rhash) won't be filled up/grown. The number of lines - * (nrecs) will be updated correctly anyway by - * xdl_prepare_ctx(). - */ - sample = (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF - ? XDL_GUESS_NLINES2 : XDL_GUESS_NLINES1); - - enl1 = xdl_guess_lines(mf1, sample) + 1; - enl2 = xdl_guess_lines(mf2, sample) + 1; - - if (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF && - xdl_init_classifier(&cf, enl1 + enl2 + 1, xpp->flags) < 0) - return -1; - - if (xdl_prepare_ctx(1, mf1, enl1, xpp, &cf, &xe->xdf1) < 0) { - - xdl_free_classifier(&cf); - return -1; - } - if (xdl_prepare_ctx(2, mf2, enl2, xpp, &cf, &xe->xdf2) < 0) { - - xdl_free_ctx(&xe->xdf1); - xdl_free_classifier(&cf); - return -1; - } - - if ((XDF_DIFF_ALG(xpp->flags) != XDF_PATIENCE_DIFF) && - (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) && - xdl_optimize_ctxs(&cf, &xe->xdf1, &xe->xdf2) < 0) { - - xdl_free_ctx(&xe->xdf2); - xdl_free_ctx(&xe->xdf1); - xdl_free_classifier(&cf); - return -1; - } - - if (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) - xdl_free_classifier(&cf); - - return 0; -} - - -void xdl_free_env(xdfenv_t *xe) { - - xdl_free_ctx(&xe->xdf2); - xdl_free_ctx(&xe->xdf1); -} - - -static int xdl_clean_mmatch(char const *dis, long i, long s, long e) { - long r, rdis0, rpdis0, rdis1, rpdis1; - - /* - * Limits the window the is examined during the similar-lines - * scan. The loops below stops when dis[i - r] == 1 (line that - * has no match), but there are corner cases where the loop - * proceed all the way to the extremities by causing huge - * performance penalties in case of big files. - */ - if (i - s > XDL_SIMSCAN_WINDOW) - s = i - XDL_SIMSCAN_WINDOW; - if (e - i > XDL_SIMSCAN_WINDOW) - e = i + XDL_SIMSCAN_WINDOW; - - /* - * Scans the lines before 'i' to find a run of lines that either - * have no match (dis[j] == 0) or have multiple matches (dis[j] > 1). - * Note that we always call this function with dis[i] > 1, so the - * current line (i) is already a multimatch line. - */ - for (r = 1, rdis0 = 0, rpdis0 = 1; (i - r) >= s; r++) { - if (!dis[i - r]) - rdis0++; - else if (dis[i - r] == 2) - rpdis0++; - else - break; - } - /* - * If the run before the line 'i' found only multimatch lines, we - * return 0 and hence we don't make the current line (i) discarded. - * We want to discard multimatch lines only when they appear in the - * middle of runs with nomatch lines (dis[j] == 0). - */ - if (rdis0 == 0) - return 0; - for (r = 1, rdis1 = 0, rpdis1 = 1; (i + r) <= e; r++) { - if (!dis[i + r]) - rdis1++; - else if (dis[i + r] == 2) - rpdis1++; - else - break; - } - /* - * If the run after the line 'i' found only multimatch lines, we - * return 0 and hence we don't make the current line (i) discarded. - */ - if (rdis1 == 0) - return 0; - rdis1 += rdis0; - rpdis1 += rpdis0; - - return rpdis1 * XDL_KPDIS_RUN < (rpdis1 + rdis1); -} - - -/* - * Try to reduce the problem complexity, discard records that have no - * matches on the other file. Also, lines that have multiple matches - * might be potentially discarded if they happear in a run of discardable. - */ -static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2) { - long i, nm, nreff, mlim; - xrecord_t **recs; - xdlclass_t *rcrec; - char *dis, *dis1, *dis2; - - if (!(dis = (char *) xdl_malloc(xdf1->nrec + xdf2->nrec + 2))) { - - return -1; - } - memset(dis, 0, xdf1->nrec + xdf2->nrec + 2); - dis1 = dis; - dis2 = dis1 + xdf1->nrec + 1; - - if ((mlim = xdl_bogosqrt(xdf1->nrec)) > XDL_MAX_EQLIMIT) - mlim = XDL_MAX_EQLIMIT; - for (i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart]; i <= xdf1->dend; i++, recs++) { - rcrec = cf->rcrecs[(*recs)->ha]; - nm = rcrec ? rcrec->len2 : 0; - dis1[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1; - } - - if ((mlim = xdl_bogosqrt(xdf2->nrec)) > XDL_MAX_EQLIMIT) - mlim = XDL_MAX_EQLIMIT; - for (i = xdf2->dstart, recs = &xdf2->recs[xdf2->dstart]; i <= xdf2->dend; i++, recs++) { - rcrec = cf->rcrecs[(*recs)->ha]; - nm = rcrec ? rcrec->len1 : 0; - dis2[i] = (nm == 0) ? 0: (nm >= mlim) ? 2: 1; - } - - for (nreff = 0, i = xdf1->dstart, recs = &xdf1->recs[xdf1->dstart]; - i <= xdf1->dend; i++, recs++) { - if (dis1[i] == 1 || - (dis1[i] == 2 && !xdl_clean_mmatch(dis1, i, xdf1->dstart, xdf1->dend))) { - xdf1->rindex[nreff] = i; - xdf1->ha[nreff] = (*recs)->ha; - nreff++; - } else - xdf1->rchg[i] = 1; - } - xdf1->nreff = nreff; - - for (nreff = 0, i = xdf2->dstart, recs = &xdf2->recs[xdf2->dstart]; - i <= xdf2->dend; i++, recs++) { - if (dis2[i] == 1 || - (dis2[i] == 2 && !xdl_clean_mmatch(dis2, i, xdf2->dstart, xdf2->dend))) { - xdf2->rindex[nreff] = i; - xdf2->ha[nreff] = (*recs)->ha; - nreff++; - } else - xdf2->rchg[i] = 1; - } - xdf2->nreff = nreff; - - xdl_free(dis); - - return 0; -} - - -/* - * Early trim initial and terminal matching records. - */ -static int xdl_trim_ends(xdfile_t *xdf1, xdfile_t *xdf2) { - long i, lim; - xrecord_t **recs1, **recs2; - - recs1 = xdf1->recs; - recs2 = xdf2->recs; - for (i = 0, lim = XDL_MIN(xdf1->nrec, xdf2->nrec); i < lim; - i++, recs1++, recs2++) - if ((*recs1)->ha != (*recs2)->ha) - break; - - xdf1->dstart = xdf2->dstart = i; - - recs1 = xdf1->recs + xdf1->nrec - 1; - recs2 = xdf2->recs + xdf2->nrec - 1; - for (lim -= i, i = 0; i < lim; i++, recs1--, recs2--) - if ((*recs1)->ha != (*recs2)->ha) - break; - - xdf1->dend = xdf1->nrec - i - 1; - xdf2->dend = xdf2->nrec - i - 1; - - return 0; -} - - -static int xdl_optimize_ctxs(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xdf2) { - - if (xdl_trim_ends(xdf1, xdf2) < 0 || - xdl_cleanup_records(cf, xdf1, xdf2) < 0) { - - return -1; - } - - return 0; -} diff --git a/third_party/git/xdiff/xprepare.h b/third_party/git/xdiff/xprepare.h deleted file mode 100644 index 947d9fc1bb..0000000000 --- a/third_party/git/xdiff/xprepare.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#if !defined(XPREPARE_H) -#define XPREPARE_H - - - -int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, - xdfenv_t *xe); -void xdl_free_env(xdfenv_t *xe); - - - -#endif /* #if !defined(XPREPARE_H) */ diff --git a/third_party/git/xdiff/xtypes.h b/third_party/git/xdiff/xtypes.h deleted file mode 100644 index 8442bd436e..0000000000 --- a/third_party/git/xdiff/xtypes.h +++ /dev/null @@ -1,67 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#if !defined(XTYPES_H) -#define XTYPES_H - - - -typedef struct s_chanode { - struct s_chanode *next; - long icurr; -} chanode_t; - -typedef struct s_chastore { - chanode_t *head, *tail; - long isize, nsize; - chanode_t *ancur; - chanode_t *sncur; - long scurr; -} chastore_t; - -typedef struct s_xrecord { - struct s_xrecord *next; - char const *ptr; - long size; - unsigned long ha; -} xrecord_t; - -typedef struct s_xdfile { - chastore_t rcha; - long nrec; - unsigned int hbits; - xrecord_t **rhash; - long dstart, dend; - xrecord_t **recs; - char *rchg; - long *rindex; - long nreff; - unsigned long *ha; -} xdfile_t; - -typedef struct s_xdfenv { - xdfile_t xdf1, xdf2; -} xdfenv_t; - - - -#endif /* #if !defined(XTYPES_H) */ diff --git a/third_party/git/xdiff/xutils.c b/third_party/git/xdiff/xutils.c deleted file mode 100644 index cfa6e2220f..0000000000 --- a/third_party/git/xdiff/xutils.c +++ /dev/null @@ -1,434 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#include "xinclude.h" - - -long xdl_bogosqrt(long n) { - long i; - - /* - * Classical integer square root approximation using shifts. - */ - for (i = 1; n > 0; n >>= 2) - i <<= 1; - - return i; -} - - -int xdl_emit_diffrec(char const *rec, long size, char const *pre, long psize, - xdemitcb_t *ecb) { - int i = 2; - mmbuffer_t mb[3]; - - mb[0].ptr = (char *) pre; - mb[0].size = psize; - mb[1].ptr = (char *) rec; - mb[1].size = size; - if (size > 0 && rec[size - 1] != '\n') { - mb[2].ptr = (char *) "\n\\ No newline at end of file\n"; - mb[2].size = strlen(mb[2].ptr); - i++; - } - if (ecb->out_line(ecb->priv, mb, i) < 0) { - - return -1; - } - - return 0; -} - -void *xdl_mmfile_first(mmfile_t *mmf, long *size) -{ - *size = mmf->size; - return mmf->ptr; -} - - -long xdl_mmfile_size(mmfile_t *mmf) -{ - return mmf->size; -} - - -int xdl_cha_init(chastore_t *cha, long isize, long icount) { - - cha->head = cha->tail = NULL; - cha->isize = isize; - cha->nsize = icount * isize; - cha->ancur = cha->sncur = NULL; - cha->scurr = 0; - - return 0; -} - - -void xdl_cha_free(chastore_t *cha) { - chanode_t *cur, *tmp; - - for (cur = cha->head; (tmp = cur) != NULL;) { - cur = cur->next; - xdl_free(tmp); - } -} - - -void *xdl_cha_alloc(chastore_t *cha) { - chanode_t *ancur; - void *data; - - if (!(ancur = cha->ancur) || ancur->icurr == cha->nsize) { - if (!(ancur = (chanode_t *) xdl_malloc(sizeof(chanode_t) + cha->nsize))) { - - return NULL; - } - ancur->icurr = 0; - ancur->next = NULL; - if (cha->tail) - cha->tail->next = ancur; - if (!cha->head) - cha->head = ancur; - cha->tail = ancur; - cha->ancur = ancur; - } - - data = (char *) ancur + sizeof(chanode_t) + ancur->icurr; - ancur->icurr += cha->isize; - - return data; -} - -long xdl_guess_lines(mmfile_t *mf, long sample) { - long nl = 0, size, tsize = 0; - char const *data, *cur, *top; - - if ((cur = data = xdl_mmfile_first(mf, &size)) != NULL) { - for (top = data + size; nl < sample && cur < top; ) { - nl++; - if (!(cur = memchr(cur, '\n', top - cur))) - cur = top; - else - cur++; - } - tsize += (long) (cur - data); - } - - if (nl && tsize) - nl = xdl_mmfile_size(mf) / (tsize / nl); - - return nl + 1; -} - -int xdl_blankline(const char *line, long size, long flags) -{ - long i; - - if (!(flags & XDF_WHITESPACE_FLAGS)) - return (size <= 1); - - for (i = 0; i < size && XDL_ISSPACE(line[i]); i++) - ; - - return (i == size); -} - -/* - * Have we eaten everything on the line, except for an optional - * CR at the very end? - */ -static int ends_with_optional_cr(const char *l, long s, long i) -{ - int complete = s && l[s-1] == '\n'; - - if (complete) - s--; - if (s == i) - return 1; - /* do not ignore CR at the end of an incomplete line */ - if (complete && s == i + 1 && l[i] == '\r') - return 1; - return 0; -} - -int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags) -{ - int i1, i2; - - if (s1 == s2 && !memcmp(l1, l2, s1)) - return 1; - if (!(flags & XDF_WHITESPACE_FLAGS)) - return 0; - - i1 = 0; - i2 = 0; - - /* - * -w matches everything that matches with -b, and -b in turn - * matches everything that matches with --ignore-space-at-eol, - * which in turn matches everything that matches with --ignore-cr-at-eol. - * - * Each flavor of ignoring needs different logic to skip whitespaces - * while we have both sides to compare. - */ - if (flags & XDF_IGNORE_WHITESPACE) { - goto skip_ws; - while (i1 < s1 && i2 < s2) { - if (l1[i1++] != l2[i2++]) - return 0; - skip_ws: - while (i1 < s1 && XDL_ISSPACE(l1[i1])) - i1++; - while (i2 < s2 && XDL_ISSPACE(l2[i2])) - i2++; - } - } else if (flags & XDF_IGNORE_WHITESPACE_CHANGE) { - while (i1 < s1 && i2 < s2) { - if (XDL_ISSPACE(l1[i1]) && XDL_ISSPACE(l2[i2])) { - /* Skip matching spaces and try again */ - while (i1 < s1 && XDL_ISSPACE(l1[i1])) - i1++; - while (i2 < s2 && XDL_ISSPACE(l2[i2])) - i2++; - continue; - } - if (l1[i1++] != l2[i2++]) - return 0; - } - } else if (flags & XDF_IGNORE_WHITESPACE_AT_EOL) { - while (i1 < s1 && i2 < s2 && l1[i1] == l2[i2]) { - i1++; - i2++; - } - } else if (flags & XDF_IGNORE_CR_AT_EOL) { - /* Find the first difference and see how the line ends */ - while (i1 < s1 && i2 < s2 && l1[i1] == l2[i2]) { - i1++; - i2++; - } - return (ends_with_optional_cr(l1, s1, i1) && - ends_with_optional_cr(l2, s2, i2)); - } - - /* - * After running out of one side, the remaining side must have - * nothing but whitespace for the lines to match. Note that - * ignore-whitespace-at-eol case may break out of the loop - * while there still are characters remaining on both lines. - */ - if (i1 < s1) { - while (i1 < s1 && XDL_ISSPACE(l1[i1])) - i1++; - if (s1 != i1) - return 0; - } - if (i2 < s2) { - while (i2 < s2 && XDL_ISSPACE(l2[i2])) - i2++; - return (s2 == i2); - } - return 1; -} - -static unsigned long xdl_hash_record_with_whitespace(char const **data, - char const *top, long flags) { - unsigned long ha = 5381; - char const *ptr = *data; - int cr_at_eol_only = (flags & XDF_WHITESPACE_FLAGS) == XDF_IGNORE_CR_AT_EOL; - - for (; ptr < top && *ptr != '\n'; ptr++) { - if (cr_at_eol_only) { - /* do not ignore CR at the end of an incomplete line */ - if (*ptr == '\r' && - (ptr + 1 < top && ptr[1] == '\n')) - continue; - } - else if (XDL_ISSPACE(*ptr)) { - const char *ptr2 = ptr; - int at_eol; - while (ptr + 1 < top && XDL_ISSPACE(ptr[1]) - && ptr[1] != '\n') - ptr++; - at_eol = (top <= ptr + 1 || ptr[1] == '\n'); - if (flags & XDF_IGNORE_WHITESPACE) - ; /* already handled */ - else if (flags & XDF_IGNORE_WHITESPACE_CHANGE - && !at_eol) { - ha += (ha << 5); - ha ^= (unsigned long) ' '; - } - else if (flags & XDF_IGNORE_WHITESPACE_AT_EOL - && !at_eol) { - while (ptr2 != ptr + 1) { - ha += (ha << 5); - ha ^= (unsigned long) *ptr2; - ptr2++; - } - } - continue; - } - ha += (ha << 5); - ha ^= (unsigned long) *ptr; - } - *data = ptr < top ? ptr + 1: ptr; - - return ha; -} - -unsigned long xdl_hash_record(char const **data, char const *top, long flags) { - unsigned long ha = 5381; - char const *ptr = *data; - - if (flags & XDF_WHITESPACE_FLAGS) - return xdl_hash_record_with_whitespace(data, top, flags); - - for (; ptr < top && *ptr != '\n'; ptr++) { - ha += (ha << 5); - ha ^= (unsigned long) *ptr; - } - *data = ptr < top ? ptr + 1: ptr; - - return ha; -} - -unsigned int xdl_hashbits(unsigned int size) { - unsigned int val = 1, bits = 0; - - for (; val < size && bits < CHAR_BIT * sizeof(unsigned int); val <<= 1, bits++); - return bits ? bits: 1; -} - - -int xdl_num_out(char *out, long val) { - char *ptr, *str = out; - char buf[32]; - - ptr = buf + sizeof(buf) - 1; - *ptr = '\0'; - if (val < 0) { - *--ptr = '-'; - val = -val; - } - for (; val && ptr > buf; val /= 10) - *--ptr = "0123456789"[val % 10]; - if (*ptr) - for (; *ptr; ptr++, str++) - *str = *ptr; - else - *str++ = '0'; - *str = '\0'; - - return str - out; -} - -static int xdl_format_hunk_hdr(long s1, long c1, long s2, long c2, - const char *func, long funclen, - xdemitcb_t *ecb) { - int nb = 0; - mmbuffer_t mb; - char buf[128]; - - memcpy(buf, "@@ -", 4); - nb += 4; - - nb += xdl_num_out(buf + nb, c1 ? s1: s1 - 1); - - if (c1 != 1) { - memcpy(buf + nb, ",", 1); - nb += 1; - - nb += xdl_num_out(buf + nb, c1); - } - - memcpy(buf + nb, " +", 2); - nb += 2; - - nb += xdl_num_out(buf + nb, c2 ? s2: s2 - 1); - - if (c2 != 1) { - memcpy(buf + nb, ",", 1); - nb += 1; - - nb += xdl_num_out(buf + nb, c2); - } - - memcpy(buf + nb, " @@", 3); - nb += 3; - if (func && funclen) { - buf[nb++] = ' '; - if (funclen > sizeof(buf) - nb - 1) - funclen = sizeof(buf) - nb - 1; - memcpy(buf + nb, func, funclen); - nb += funclen; - } - buf[nb++] = '\n'; - - mb.ptr = buf; - mb.size = nb; - if (ecb->out_line(ecb->priv, &mb, 1) < 0) - return -1; - return 0; -} - -int xdl_emit_hunk_hdr(long s1, long c1, long s2, long c2, - const char *func, long funclen, - xdemitcb_t *ecb) { - if (!ecb->out_hunk) - return xdl_format_hunk_hdr(s1, c1, s2, c2, func, funclen, ecb); - if (ecb->out_hunk(ecb->priv, - c1 ? s1 : s1 - 1, c1, - c2 ? s2 : s2 - 1, c2, - func, funclen) < 0) - return -1; - return 0; -} - -int xdl_fall_back_diff(xdfenv_t *diff_env, xpparam_t const *xpp, - int line1, int count1, int line2, int count2) -{ - /* - * This probably does not work outside Git, since - * we have a very simple mmfile structure. - * - * Note: ideally, we would reuse the prepared environment, but - * the libxdiff interface does not (yet) allow for diffing only - * ranges of lines instead of the whole files. - */ - mmfile_t subfile1, subfile2; - xdfenv_t env; - - subfile1.ptr = (char *)diff_env->xdf1.recs[line1 - 1]->ptr; - subfile1.size = diff_env->xdf1.recs[line1 + count1 - 2]->ptr + - diff_env->xdf1.recs[line1 + count1 - 2]->size - subfile1.ptr; - subfile2.ptr = (char *)diff_env->xdf2.recs[line2 - 1]->ptr; - subfile2.size = diff_env->xdf2.recs[line2 + count2 - 2]->ptr + - diff_env->xdf2.recs[line2 + count2 - 2]->size - subfile2.ptr; - if (xdl_do_diff(&subfile1, &subfile2, xpp, &env) < 0) - return -1; - - memcpy(diff_env->xdf1.rchg + line1 - 1, env.xdf1.rchg, count1); - memcpy(diff_env->xdf2.rchg + line2 - 1, env.xdf2.rchg, count2); - - xdl_free_env(&env); - - return 0; -} diff --git a/third_party/git/xdiff/xutils.h b/third_party/git/xdiff/xutils.h deleted file mode 100644 index fba7bae03c..0000000000 --- a/third_party/git/xdiff/xutils.h +++ /dev/null @@ -1,47 +0,0 @@ -/* - * LibXDiff by Davide Libenzi ( File Differential Library ) - * Copyright (C) 2003 Davide Libenzi - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - * - * Davide Libenzi <davidel@xmailserver.org> - * - */ - -#if !defined(XUTILS_H) -#define XUTILS_H - - - -long xdl_bogosqrt(long n); -int xdl_emit_diffrec(char const *rec, long size, char const *pre, long psize, - xdemitcb_t *ecb); -int xdl_cha_init(chastore_t *cha, long isize, long icount); -void xdl_cha_free(chastore_t *cha); -void *xdl_cha_alloc(chastore_t *cha); -long xdl_guess_lines(mmfile_t *mf, long sample); -int xdl_blankline(const char *line, long size, long flags); -int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags); -unsigned long xdl_hash_record(char const **data, char const *top, long flags); -unsigned int xdl_hashbits(unsigned int size); -int xdl_num_out(char *out, long val); -int xdl_emit_hunk_hdr(long s1, long c1, long s2, long c2, - const char *func, long funclen, xdemitcb_t *ecb); -int xdl_fall_back_diff(xdfenv_t *diff_env, xpparam_t const *xpp, - int line1, int count1, int line2, int count2); - - - -#endif /* #if !defined(XUTILS_H) */ |