diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 42 |
1 files changed, 38 insertions, 4 deletions
@@ -1364,6 +1364,32 @@ static struct sha1_size_cache *locate_size_cache(unsigned char *sha1, return e; } +static int populate_from_stdin(struct diff_filespec *s) +{ +#define INCREMENT 1024 + char *buf; + unsigned long size; + int got; + + size = 0; + buf = NULL; + while (1) { + buf = xrealloc(buf, size + INCREMENT); + got = xread(0, buf + size, INCREMENT); + if (!got) + break; /* EOF */ + if (got < 0) + return error("error while reading from stdin %s", + strerror(errno)); + size += got; + } + s->should_munmap = 0; + s->data = buf; + s->size = size; + s->should_free = 1; + return 0; +} + /* * While doing rename detection and pickaxe operation, we may need to * grab the data for the blob (or file) for our own in-core comparison. @@ -1389,6 +1415,9 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only) char *buf; unsigned long size; + if (!strcmp(s->path, "-")) + return populate_from_stdin(s); + if (lstat(s->path, &st) < 0) { if (errno == ENOENT) { err_empty: @@ -1399,7 +1428,7 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only) return err; } } - s->size = st.st_size; + s->size = xsize_t(st.st_size); if (!s->size) goto empty; if (size_only) @@ -1515,12 +1544,13 @@ static void prepare_temp_file(const char *name, if (S_ISLNK(st.st_mode)) { int ret; char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */ + size_t sz = xsize_t(st.st_size); if (sizeof(buf) <= st.st_size) die("symlink too long: %s", name); - ret = readlink(name, buf, st.st_size); + ret = readlink(name, buf, sz); if (ret < 0) die("readlink(%s)", name); - prep_temp_blob(temp, buf, st.st_size, + prep_temp_blob(temp, buf, sz, (one->sha1_valid ? one->sha1 : null_sha1), (one->sha1_valid ? @@ -1689,6 +1719,10 @@ static void diff_fill_sha1_info(struct diff_filespec *one) if (DIFF_FILE_VALID(one)) { if (!one->sha1_valid) { struct stat st; + if (!strcmp(one->path, "-")) { + hashcpy(one->sha1, null_sha1); + return; + } if (lstat(one->path, &st) < 0) die("stat %s", one->path); if (index_path(one->sha1, one->path, &st, 0)) @@ -2138,7 +2172,7 @@ static int parse_num(const char **cp_p) /* user says num divided by scale and we say internally that * is MAX_SCORE * num / scale. */ - return (num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale); + return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); } int diff_scoreopt_parse(const char *opt) |