diff options
Diffstat (limited to 'third_party/git/ws.c')
| -rw-r--r-- | third_party/git/ws.c | 383 |
1 files changed, 0 insertions, 383 deletions
diff --git a/third_party/git/ws.c b/third_party/git/ws.c deleted file mode 100644 index 6e69877f25..0000000000 --- a/third_party/git/ws.c +++ /dev/null @@ -1,383 +0,0 @@ -/* - * Whitespace rules - * - * Copyright (c) 2007 Junio C Hamano - */ -#include "cache.h" -#include "attr.h" - -static struct whitespace_rule { - const char *rule_name; - unsigned rule_bits; - unsigned loosens_error:1, - exclude_default:1; -} whitespace_rule_names[] = { - { "trailing-space", WS_TRAILING_SPACE, 0 }, - { "space-before-tab", WS_SPACE_BEFORE_TAB, 0 }, - { "indent-with-non-tab", WS_INDENT_WITH_NON_TAB, 0 }, - { "cr-at-eol", WS_CR_AT_EOL, 1 }, - { "blank-at-eol", WS_BLANK_AT_EOL, 0 }, - { "blank-at-eof", WS_BLANK_AT_EOF, 0 }, - { "tab-in-indent", WS_TAB_IN_INDENT, 0, 1 }, -}; - -unsigned parse_whitespace_rule(const char *string) -{ - unsigned rule = WS_DEFAULT_RULE; - - while (string) { - int i; - size_t len; - const char *ep; - int negated = 0; - - string = string + strspn(string, ", \t\n\r"); - ep = strchrnul(string, ','); - len = ep - string; - - if (*string == '-') { - negated = 1; - string++; - len--; - } - if (!len) - break; - for (i = 0; i < ARRAY_SIZE(whitespace_rule_names); i++) { - if (strncmp(whitespace_rule_names[i].rule_name, - string, len)) - continue; - if (negated) - rule &= ~whitespace_rule_names[i].rule_bits; - else - rule |= whitespace_rule_names[i].rule_bits; - break; - } - if (strncmp(string, "tabwidth=", 9) == 0) { - unsigned tabwidth = atoi(string + 9); - if (0 < tabwidth && tabwidth < 0100) { - rule &= ~WS_TAB_WIDTH_MASK; - rule |= tabwidth; - } - else - warning("tabwidth %.*s out of range", - (int)(len - 9), string + 9); - } - string = ep; - } - - if (rule & WS_TAB_IN_INDENT && rule & WS_INDENT_WITH_NON_TAB) - die("cannot enforce both tab-in-indent and indent-with-non-tab"); - return rule; -} - -unsigned whitespace_rule(struct index_state *istate, const char *pathname) -{ - static struct attr_check *attr_whitespace_rule; - const char *value; - - if (!attr_whitespace_rule) - attr_whitespace_rule = attr_check_initl("whitespace", NULL); - - git_check_attr(istate, pathname, attr_whitespace_rule); - value = attr_whitespace_rule->items[0].value; - if (ATTR_TRUE(value)) { - /* true (whitespace) */ - unsigned all_rule = ws_tab_width(whitespace_rule_cfg); - int i; - for (i = 0; i < ARRAY_SIZE(whitespace_rule_names); i++) - if (!whitespace_rule_names[i].loosens_error && - !whitespace_rule_names[i].exclude_default) - all_rule |= whitespace_rule_names[i].rule_bits; - return all_rule; - } else if (ATTR_FALSE(value)) { - /* false (-whitespace) */ - return ws_tab_width(whitespace_rule_cfg); - } else if (ATTR_UNSET(value)) { - /* reset to default (!whitespace) */ - return whitespace_rule_cfg; - } else { - /* string */ - return parse_whitespace_rule(value); - } -} - -/* The returned string should be freed by the caller. */ -char *whitespace_error_string(unsigned ws) -{ - struct strbuf err = STRBUF_INIT; - if ((ws & WS_TRAILING_SPACE) == WS_TRAILING_SPACE) - strbuf_addstr(&err, "trailing whitespace"); - else { - if (ws & WS_BLANK_AT_EOL) - strbuf_addstr(&err, "trailing whitespace"); - if (ws & WS_BLANK_AT_EOF) { - if (err.len) - strbuf_addstr(&err, ", "); - strbuf_addstr(&err, "new blank line at EOF"); - } - } - if (ws & WS_SPACE_BEFORE_TAB) { - if (err.len) - strbuf_addstr(&err, ", "); - strbuf_addstr(&err, "space before tab in indent"); - } - if (ws & WS_INDENT_WITH_NON_TAB) { - if (err.len) - strbuf_addstr(&err, ", "); - strbuf_addstr(&err, "indent with spaces"); - } - if (ws & WS_TAB_IN_INDENT) { - if (err.len) - strbuf_addstr(&err, ", "); - strbuf_addstr(&err, "tab in indent"); - } - return strbuf_detach(&err, NULL); -} - -/* If stream is non-NULL, emits the line after checking. */ -static unsigned ws_check_emit_1(const char *line, int len, unsigned ws_rule, - FILE *stream, const char *set, - const char *reset, const char *ws) -{ - unsigned result = 0; - int written = 0; - int trailing_whitespace = -1; - int trailing_newline = 0; - int trailing_carriage_return = 0; - int i; - - /* Logic is simpler if we temporarily ignore the trailing newline. */ - if (len > 0 && line[len - 1] == '\n') { - trailing_newline = 1; - len--; - } - if ((ws_rule & WS_CR_AT_EOL) && - len > 0 && line[len - 1] == '\r') { - trailing_carriage_return = 1; - len--; - } - - /* Check for trailing whitespace. */ - if (ws_rule & WS_BLANK_AT_EOL) { - for (i = len - 1; i >= 0; i--) { - if (isspace(line[i])) { - trailing_whitespace = i; - result |= WS_BLANK_AT_EOL; - } - else - break; - } - } - - if (trailing_whitespace == -1) - trailing_whitespace = len; - - /* Check indentation */ - for (i = 0; i < trailing_whitespace; i++) { - if (line[i] == ' ') - continue; - if (line[i] != '\t') - break; - if ((ws_rule & WS_SPACE_BEFORE_TAB) && written < i) { - result |= WS_SPACE_BEFORE_TAB; - if (stream) { - fputs(ws, stream); - fwrite(line + written, i - written, 1, stream); - fputs(reset, stream); - fwrite(line + i, 1, 1, stream); - } - } else if (ws_rule & WS_TAB_IN_INDENT) { - result |= WS_TAB_IN_INDENT; - if (stream) { - fwrite(line + written, i - written, 1, stream); - fputs(ws, stream); - fwrite(line + i, 1, 1, stream); - fputs(reset, stream); - } - } else if (stream) { - fwrite(line + written, i - written + 1, 1, stream); - } - written = i + 1; - } - - /* Check for indent using non-tab. */ - if ((ws_rule & WS_INDENT_WITH_NON_TAB) && i - written >= ws_tab_width(ws_rule)) { - result |= WS_INDENT_WITH_NON_TAB; - if (stream) { - fputs(ws, stream); - fwrite(line + written, i - written, 1, stream); - fputs(reset, stream); - } - written = i; - } - - if (stream) { - /* - * Now the rest of the line starts at "written". - * The non-highlighted part ends at "trailing_whitespace". - */ - - /* Emit non-highlighted (middle) segment. */ - if (trailing_whitespace - written > 0) { - fputs(set, stream); - fwrite(line + written, - trailing_whitespace - written, 1, stream); - fputs(reset, stream); - } - - /* Highlight errors in trailing whitespace. */ - if (trailing_whitespace != len) { - fputs(ws, stream); - fwrite(line + trailing_whitespace, - len - trailing_whitespace, 1, stream); - fputs(reset, stream); - } - if (trailing_carriage_return) - fputc('\r', stream); - if (trailing_newline) - fputc('\n', stream); - } - return result; -} - -void ws_check_emit(const char *line, int len, unsigned ws_rule, - FILE *stream, const char *set, - const char *reset, const char *ws) -{ - (void)ws_check_emit_1(line, len, ws_rule, stream, set, reset, ws); -} - -unsigned ws_check(const char *line, int len, unsigned ws_rule) -{ - return ws_check_emit_1(line, len, ws_rule, NULL, NULL, NULL, NULL); -} - -int ws_blank_line(const char *line, int len, unsigned ws_rule) -{ - /* - * We _might_ want to treat CR differently from other - * whitespace characters when ws_rule has WS_CR_AT_EOL, but - * for now we just use this stupid definition. - */ - while (len-- > 0) { - if (!isspace(*line)) - return 0; - line++; - } - return 1; -} - -/* Copy the line onto the end of the strbuf while fixing whitespaces */ -void ws_fix_copy(struct strbuf *dst, const char *src, int len, unsigned ws_rule, int *error_count) -{ - /* - * len is number of bytes to be copied from src, starting - * at src. Typically src[len-1] is '\n', unless this is - * the incomplete last line. - */ - int i; - int add_nl_to_tail = 0; - int add_cr_to_tail = 0; - int fixed = 0; - int last_tab_in_indent = -1; - int last_space_in_indent = -1; - int need_fix_leading_space = 0; - - /* - * Strip trailing whitespace - */ - if (ws_rule & WS_BLANK_AT_EOL) { - if (0 < len && src[len - 1] == '\n') { - add_nl_to_tail = 1; - len--; - if (0 < len && src[len - 1] == '\r') { - add_cr_to_tail = !!(ws_rule & WS_CR_AT_EOL); - len--; - } - } - if (0 < len && isspace(src[len - 1])) { - while (0 < len && isspace(src[len-1])) - len--; - fixed = 1; - } - } - - /* - * Check leading whitespaces (indent) - */ - for (i = 0; i < len; i++) { - char ch = src[i]; - if (ch == '\t') { - last_tab_in_indent = i; - if ((ws_rule & WS_SPACE_BEFORE_TAB) && - 0 <= last_space_in_indent) - need_fix_leading_space = 1; - } else if (ch == ' ') { - last_space_in_indent = i; - if ((ws_rule & WS_INDENT_WITH_NON_TAB) && - ws_tab_width(ws_rule) <= i - last_tab_in_indent) - need_fix_leading_space = 1; - } else - break; - } - - if (need_fix_leading_space) { - /* Process indent ourselves */ - int consecutive_spaces = 0; - int last = last_tab_in_indent + 1; - - if (ws_rule & WS_INDENT_WITH_NON_TAB) { - /* have "last" point at one past the indent */ - if (last_tab_in_indent < last_space_in_indent) - last = last_space_in_indent + 1; - else - last = last_tab_in_indent + 1; - } - - /* - * between src[0..last-1], strip the funny spaces, - * updating them to tab as needed. - */ - for (i = 0; i < last; i++) { - char ch = src[i]; - if (ch != ' ') { - consecutive_spaces = 0; - strbuf_addch(dst, ch); - } else { - consecutive_spaces++; - if (consecutive_spaces == ws_tab_width(ws_rule)) { - strbuf_addch(dst, '\t'); - consecutive_spaces = 0; - } - } - } - while (0 < consecutive_spaces--) - strbuf_addch(dst, ' '); - len -= last; - src += last; - fixed = 1; - } else if ((ws_rule & WS_TAB_IN_INDENT) && last_tab_in_indent >= 0) { - /* Expand tabs into spaces */ - int start = dst->len; - int last = last_tab_in_indent + 1; - for (i = 0; i < last; i++) { - if (src[i] == '\t') - do { - strbuf_addch(dst, ' '); - } while ((dst->len - start) % ws_tab_width(ws_rule)); - else - strbuf_addch(dst, src[i]); - } - len -= last; - src += last; - fixed = 1; - } - - strbuf_add(dst, src, len); - if (add_cr_to_tail) - strbuf_addch(dst, '\r'); - if (add_nl_to_tail) - strbuf_addch(dst, '\n'); - if (fixed && error_count) - (*error_count)++; -} |