1 files changed, 0 insertions, 569 deletions
diff --git a/third_party/git/streaming.c b/third_party/git/streaming.c
deleted file mode 100644
index 800f07a52cc8..000000000000
--- a/third_party/git/streaming.c
+++ /dev/null
@@ -1,569 +0,0 @@
-/*
- * Copyright (c) 2011, Google Inc.
- */
-#include "cache.h"
-#include "streaming.h"
-#include "repository.h"
-#include "object-store.h"
-#include "replace-object.h"
-#include "packfile.h"
-
-enum input_source {
-	stream_error = -1,
-	incore = 0,
-	loose = 1,
-	pack_non_delta = 2
-};
-
-typedef int (*open_istream_fn)(struct git_istream *,
-			       struct repository *,
-			       struct object_info *,
-			       const struct object_id *,
-			       enum object_type *);
-typedef int (*close_istream_fn)(struct git_istream *);
-typedef ssize_t (*read_istream_fn)(struct git_istream *, char *, size_t);
-
-struct stream_vtbl {
-	close_istream_fn close;
-	read_istream_fn read;
-};
-
-#define open_method_decl(name) \
-	int open_istream_ ##name \
-	(struct git_istream *st, struct repository *r, \
-	 struct object_info *oi, const struct object_id *oid, \
-	 enum object_type *type)
-
-#define close_method_decl(name) \
-	int close_istream_ ##name \
-	(struct git_istream *st)
-
-#define read_method_decl(name) \
-	ssize_t read_istream_ ##name \
-	(struct git_istream *st, char *buf, size_t sz)
-
-/* forward declaration */
-static open_method_decl(incore);
-static open_method_decl(loose);
-static open_method_decl(pack_non_delta);
-static struct git_istream *attach_stream_filter(struct git_istream *st,
-						struct stream_filter *filter);
-
-
-static open_istream_fn open_istream_tbl[] = {
-	open_istream_incore,
-	open_istream_loose,
-	open_istream_pack_non_delta,
-};
-
-#define FILTER_BUFFER (1024*16)
-
-struct filtered_istream {
-	struct git_istream *upstream;
-	struct stream_filter *filter;
-	char ibuf[FILTER_BUFFER];
-	char obuf[FILTER_BUFFER];
-	int i_end, i_ptr;
-	int o_end, o_ptr;
-	int input_finished;
-};
-
-struct git_istream {
-	const struct stream_vtbl *vtbl;
-	unsigned long size; /* inflated size of full object */
-	git_zstream z;
-	enum { z_unused, z_used, z_done, z_error } z_state;
-
-	union {
-		struct {
-			char *buf; /* from read_object() */
-			unsigned long read_ptr;
-		} incore;
-
-		struct {
-			void *mapped;
-			unsigned long mapsize;
-			char hdr[32];
-			int hdr_avail;
-			int hdr_used;
-		} loose;
-
-		struct {
-			struct packed_git *pack;
-			off_t pos;
-		} in_pack;
-
-		struct filtered_istream filtered;
-	} u;
-};
-
-int close_istream(struct git_istream *st)
-{
-	int r = st->vtbl->close(st);
-	free(st);
-	return r;
-}
-
-ssize_t read_istream(struct git_istream *st, void *buf, size_t sz)
-{
-	return st->vtbl->read(st, buf, sz);
-}
-
-static enum input_source istream_source(struct repository *r,
-					const struct object_id *oid,
-					enum object_type *type,
-					struct object_info *oi)
-{
-	unsigned long size;
-	int status;
-
-	oi->typep = type;
-	oi->sizep = &size;
-	status = oid_object_info_extended(r, oid, oi, 0);
-	if (status < 0)
-		return stream_error;
-
-	switch (oi->whence) {
-	case OI_LOOSE:
-		return loose;
-	case OI_PACKED:
-		if (!oi->u.packed.is_delta && big_file_threshold < size)
-			return pack_non_delta;
-		/* fallthru */
-	default:
-		return incore;
-	}
-}
-
-struct git_istream *open_istream(struct repository *r,
-				 const struct object_id *oid,
-				 enum object_type *type,
-				 unsigned long *size,
-				 struct stream_filter *filter)
-{
-	struct git_istream *st;
-	struct object_info oi = OBJECT_INFO_INIT;
-	const struct object_id *real = lookup_replace_object(r, oid);
-	enum input_source src = istream_source(r, real, type, &oi);
-
-	if (src < 0)
-		return NULL;
-
-	st = xmalloc(sizeof(*st));
-	if (open_istream_tbl[src](st, r, &oi, real, type)) {
-		if (open_istream_incore(st, r, &oi, real, type)) {
-			free(st);
-			return NULL;
-		}
-	}
-	if (filter) {
-		/* Add "&& !is_null_stream_filter(filter)" for performance */
-		struct git_istream *nst = attach_stream_filter(st, filter);
-		if (!nst) {
-			close_istream(st);
-			return NULL;
-		}
-		st = nst;
-	}
-
-	*size = st->size;
-	return st;
-}
-
-
-/*****************************************************************
- *
- * Common helpers
- *
- *****************************************************************/
-
-static void close_deflated_stream(struct git_istream *st)
-{
-	if (st->z_state == z_used)
-		git_inflate_end(&st->z);
-}
-
-
-/*****************************************************************
- *
- * Filtered stream
- *
- *****************************************************************/
-
-static close_method_decl(filtered)
-{
-	free_stream_filter(st->u.filtered.filter);
-	return close_istream(st->u.filtered.upstream);
-}
-
-static read_method_decl(filtered)
-{
-	struct filtered_istream *fs = &(st->u.filtered);
-	size_t filled = 0;
-
-	while (sz) {
-		/* do we already have filtered output? */
-		if (fs->o_ptr < fs->o_end) {
-			size_t to_move = fs->o_end - fs->o_ptr;
-			if (sz < to_move)
-				to_move = sz;
-			memcpy(buf + filled, fs->obuf + fs->o_ptr, to_move);
-			fs->o_ptr += to_move;
-			sz -= to_move;
-			filled += to_move;
-			continue;
-		}
-		fs->o_end = fs->o_ptr = 0;
-
-		/* do we have anything to feed the filter with? */
-		if (fs->i_ptr < fs->i_end) {
-			size_t to_feed = fs->i_end - fs->i_ptr;
-			size_t to_receive = FILTER_BUFFER;
-			if (stream_filter(fs->filter,
-					  fs->ibuf + fs->i_ptr, &to_feed,
-					  fs->obuf, &to_receive))
-				return -1;
-			fs->i_ptr = fs->i_end - to_feed;
-			fs->o_end = FILTER_BUFFER - to_receive;
-			continue;
-		}
-
-		/* tell the filter to drain upon no more input */
-		if (fs->input_finished) {
-			size_t to_receive = FILTER_BUFFER;
-			if (stream_filter(fs->filter,
-					  NULL, NULL,
-					  fs->obuf, &to_receive))
-				return -1;
-			fs->o_end = FILTER_BUFFER - to_receive;
-			if (!fs->o_end)
-				break;
-			continue;
-		}
-		fs->i_end = fs->i_ptr = 0;
-
-		/* refill the input from the upstream */
-		if (!fs->input_finished) {
-			fs->i_end = read_istream(fs->upstream, fs->ibuf, FILTER_BUFFER);
-			if (fs->i_end < 0)
-				return -1;
-			if (fs->i_end)
-				continue;
-		}
-		fs->input_finished = 1;
-	}
-	return filled;
-}
-
-static struct stream_vtbl filtered_vtbl = {
-	close_istream_filtered,
-	read_istream_filtered,
-};
-
-static struct git_istream *attach_stream_filter(struct git_istream *st,
-						struct stream_filter *filter)
-{
-	struct git_istream *ifs = xmalloc(sizeof(*ifs));
-	struct filtered_istream *fs = &(ifs->u.filtered);
-
-	ifs->vtbl = &filtered_vtbl;
-	fs->upstream = st;
-	fs->filter = filter;
-	fs->i_end = fs->i_ptr = 0;
-	fs->o_end = fs->o_ptr = 0;
-	fs->input_finished = 0;
-	ifs->size = -1; /* unknown */
-	return ifs;
-}
-
-/*****************************************************************
- *
- * Loose object stream
- *
- *****************************************************************/
-
-static read_method_decl(loose)
-{
-	size_t total_read = 0;
-
-	switch (st->z_state) {
-	case z_done:
-		return 0;
-	case z_error:
-		return -1;
-	default:
-		break;
-	}
-
-	if (st->u.loose.hdr_used < st->u.loose.hdr_avail) {
-		size_t to_copy = st->u.loose.hdr_avail - st->u.loose.hdr_used;
-		if (sz < to_copy)
-			to_copy = sz;
-		memcpy(buf, st->u.loose.hdr + st->u.loose.hdr_used, to_copy);
-		st->u.loose.hdr_used += to_copy;
-		total_read += to_copy;
-	}
-
-	while (total_read < sz) {
-		int status;
-
-		st->z.next_out = (unsigned char *)buf + total_read;
-		st->z.avail_out = sz - total_read;
-		status = git_inflate(&st->z, Z_FINISH);
-
-		total_read = st->z.next_out - (unsigned char *)buf;
-
-		if (status == Z_STREAM_END) {
-			git_inflate_end(&st->z);
-			st->z_state = z_done;
-			break;
-		}
-		if (status != Z_OK && (status != Z_BUF_ERROR || total_read < sz)) {
-			git_inflate_end(&st->z);
-			st->z_state = z_error;
-			return -1;
-		}
-	}
-	return total_read;
-}
-
-static close_method_decl(loose)
-{
-	close_deflated_stream(st);
-	munmap(st->u.loose.mapped, st->u.loose.mapsize);
-	return 0;
-}
-
-static struct stream_vtbl loose_vtbl = {
-	close_istream_loose,
-	read_istream_loose,
-};
-
-static open_method_decl(loose)
-{
-	st->u.loose.mapped = map_loose_object(r, oid, &st->u.loose.mapsize);
-	if (!st->u.loose.mapped)
-		return -1;
-	if ((unpack_loose_header(&st->z,
-				 st->u.loose.mapped,
-				 st->u.loose.mapsize,
-				 st->u.loose.hdr,
-				 sizeof(st->u.loose.hdr)) < 0) ||
-	    (parse_loose_header(st->u.loose.hdr, &st->size) < 0)) {
-		git_inflate_end(&st->z);
-		munmap(st->u.loose.mapped, st->u.loose.mapsize);
-		return -1;
-	}
-
-	st->u.loose.hdr_used = strlen(st->u.loose.hdr) + 1;
-	st->u.loose.hdr_avail = st->z.total_out;
-	st->z_state = z_used;
-
-	st->vtbl = &loose_vtbl;
-	return 0;
-}
-
-
-/*****************************************************************
- *
- * Non-delta packed object stream
- *
- *****************************************************************/
-
-static read_method_decl(pack_non_delta)
-{
-	size_t total_read = 0;
-
-	switch (st->z_state) {
-	case z_unused:
-		memset(&st->z, 0, sizeof(st->z));
-		git_inflate_init(&st->z);
-		st->z_state = z_used;
-		break;
-	case z_done:
-		return 0;
-	case z_error:
-		return -1;
-	case z_used:
-		break;
-	}
-
-	while (total_read < sz) {
-		int status;
-		struct pack_window *window = NULL;
-		unsigned char *mapped;
-
-		mapped = use_pack(st->u.in_pack.pack, &window,
-				  st->u.in_pack.pos, &st->z.avail_in);
-
-		st->z.next_out = (unsigned char *)buf + total_read;
-		st->z.avail_out = sz - total_read;
-		st->z.next_in = mapped;
-		status = git_inflate(&st->z, Z_FINISH);
-
-		st->u.in_pack.pos += st->z.next_in - mapped;
-		total_read = st->z.next_out - (unsigned char *)buf;
-		unuse_pack(&window);
-
-		if (status == Z_STREAM_END) {
-			git_inflate_end(&st->z);
-			st->z_state = z_done;
-			break;
-		}
-
-		/*
-		 * Unlike the loose object case, we do not have to worry here
-		 * about running out of input bytes and spinning infinitely. If
-		 * we get Z_BUF_ERROR due to too few input bytes, then we'll
-		 * replenish them in the next use_pack() call when we loop. If
-		 * we truly hit the end of the pack (i.e., because it's corrupt
-		 * or truncated), then use_pack() catches that and will die().
-		 */
-		if (status != Z_OK && status != Z_BUF_ERROR) {
-			git_inflate_end(&st->z);
-			st->z_state = z_error;
-			return -1;
-		}
-	}
-	return total_read;
-}
-
-static close_method_decl(pack_non_delta)
-{
-	close_deflated_stream(st);
-	return 0;
-}
-
-static struct stream_vtbl pack_non_delta_vtbl = {
-	close_istream_pack_non_delta,
-	read_istream_pack_non_delta,
-};
-
-static open_method_decl(pack_non_delta)
-{
-	struct pack_window *window;
-	enum object_type in_pack_type;
-
-	st->u.in_pack.pack = oi->u.packed.pack;
-	st->u.in_pack.pos = oi->u.packed.offset;
-	window = NULL;
-
-	in_pack_type = unpack_object_header(st->u.in_pack.pack,
-					    &window,
-					    &st->u.in_pack.pos,
-					    &st->size);
-	unuse_pack(&window);
-	switch (in_pack_type) {
-	default:
-		return -1; /* we do not do deltas for now */
-	case OBJ_COMMIT:
-	case OBJ_TREE:
-	case OBJ_BLOB:
-	case OBJ_TAG:
-		break;
-	}
-	st->z_state = z_unused;
-	st->vtbl = &pack_non_delta_vtbl;
-	return 0;
-}
-
-
-/*****************************************************************
- *
- * In-core stream
- *
- *****************************************************************/
-
-static close_method_decl(incore)
-{
-	free(st->u.incore.buf);
-	return 0;
-}
-
-static read_method_decl(incore)
-{
-	size_t read_size = sz;
-	size_t remainder = st->size - st->u.incore.read_ptr;
-
-	if (remainder <= read_size)
-		read_size = remainder;
-	if (read_size) {
-		memcpy(buf, st->u.incore.buf + st->u.incore.read_ptr, read_size);
-		st->u.incore.read_ptr += read_size;
-	}
-	return read_size;
-}
-
-static struct stream_vtbl incore_vtbl = {
-	close_istream_incore,
-	read_istream_incore,
-};
-
-static open_method_decl(incore)
-{
-	st->u.incore.buf = read_object_file_extended(r, oid, type, &st->size, 0);
-	st->u.incore.read_ptr = 0;
-	st->vtbl = &incore_vtbl;
-
-	return st->u.incore.buf ? 0 : -1;
-}
-
-
-/****************************************************************
- * Users of streaming interface
- ****************************************************************/
-
-int stream_blob_to_fd(int fd, const struct object_id *oid, struct stream_filter *filter,
-		      int can_seek)
-{
-	struct git_istream *st;
-	enum object_type type;
-	unsigned long sz;
-	ssize_t kept = 0;
-	int result = -1;
-
-	st = open_istream(the_repository, oid, &type, &sz, filter);
-	if (!st) {
-		if (filter)
-			free_stream_filter(filter);
-		return result;
-	}
-	if (type != OBJ_BLOB)
-		goto close_and_exit;
-	for (;;) {
-		char buf[1024 * 16];
-		ssize_t wrote, holeto;
-		ssize_t readlen = read_istream(st, buf, sizeof(buf));
-
-		if (readlen < 0)
-			goto close_and_exit;
-		if (!readlen)
-			break;
-		if (can_seek && sizeof(buf) == readlen) {
-			for (holeto = 0; holeto < readlen; holeto++)
-				if (buf[holeto])
-					break;
-			if (readlen == holeto) {
-				kept += holeto;
-				continue;
-			}
-		}
-
-		if (kept && lseek(fd, kept, SEEK_CUR) == (off_t) -1)
-			goto close_and_exit;
-		else
-			kept = 0;
-		wrote = write_in_full(fd, buf, readlen);
-
-		if (wrote < 0)
-			goto close_and_exit;
-	}
-	if (kept && (lseek(fd, kept - 1, SEEK_CUR) == (off_t) -1 ||
-		     xwrite(fd, "", 1) != 1))
-		goto close_and_exit;
-	result = 0;
-
- close_and_exit:
-	close_istream(st);
-	return result;
-}