static int git_xdiff_scan_int(const char **str, int *value)
{
const char *scan = *str;
int v = 0, digits = 0;
/* find next digit */
for (scan = *str; *scan && !git__isdigit(*scan); scan++);
/* parse next number */
for (; git__isdigit(*scan); scan++, digits++)
v = (v * 10) + (*scan - '0');
*str = scan;
*value = v;
return (digits > 0) ? 0 : -1;
}
static int extract_how_many(int *n, const char *spec, size_t *pos)
{
const char *end_ptr;
int parsed, accumulated;
char kind = spec[*pos];
assert(spec[*pos] == '^' || spec[*pos] == '~');
accumulated = 0;
do {
do {
(*pos)++;
accumulated++;
} while (spec[(*pos)] == kind && kind == '~');
if (git__isdigit(spec[*pos])) {
if (git__strtol32(&parsed, spec + *pos, &end_ptr, 10) < 0)
return GIT_EINVALIDSPEC;
accumulated += (parsed - 1);
*pos = end_ptr - spec;
}
} while (spec[(*pos)] == kind && kind == '~');
*n = accumulated;
return 0;
}
static int parse_number(git_off_t *out, git_patch_parse_ctx *ctx)
{
const char *end;
int64_t num;
if (!git__isdigit(ctx->parse_ctx.line[0]))
return -1;
if (git__strntol64(&num, ctx->parse_ctx.line, ctx->parse_ctx.line_len, &end, 10) < 0)
return -1;
if (num < 0)
return -1;
*out = num;
git_parse_advance_chars(&ctx->parse_ctx, (end - ctx->parse_ctx.line));
return 0;
}
static int parse_header_percent(uint16_t *out, git_patch_parse_ctx *ctx)
{
int32_t val;
const char *end;
if (ctx->line_len < 1 || !git__isdigit(ctx->line[0]) ||
git__strntol32(&val, ctx->line, ctx->line_len, &end, 10) < 0)
return -1;
parse_advance_chars(ctx, (end - ctx->line));
if (parse_advance_expected_s(ctx, "%") < 0)
return -1;
if (val > 100)
return -1;
*out = val;
return 0;
}
static int parse_header_mode(uint16_t *mode, git_patch_parse_ctx *ctx)
{
const char *end;
int32_t m;
int ret;
if (ctx->line_len < 1 || !git__isdigit(ctx->line[0]))
return parse_err("invalid file mode at line %d", ctx->line_num);
if ((ret = git__strntol32(&m, ctx->line, ctx->line_len, &end, 8)) < 0)
return ret;
if (m > UINT16_MAX)
return -1;
*mode = (uint16_t)m;
parse_advance_chars(ctx, (end - ctx->line));
return ret;
}
static int commit_quick_parse(git_revwalk *walk, git_commit_list_node *commit, git_rawobj *raw)
{
const size_t parent_len = strlen("parent ") + GIT_OID_HEXSZ + 1;
unsigned char *buffer = raw->data;
unsigned char *buffer_end = buffer + raw->len;
unsigned char *parents_start, *committer_start;
int i, parents = 0;
int commit_time;
buffer += strlen("tree ") + GIT_OID_HEXSZ + 1;
parents_start = buffer;
while (buffer + parent_len < buffer_end && memcmp(buffer, "parent ", strlen("parent ")) == 0) {
parents++;
buffer += parent_len;
}
commit->parents = alloc_parents(walk, commit, parents);
GITERR_CHECK_ALLOC(commit->parents);
buffer = parents_start;
for (i = 0; i < parents; ++i) {
git_oid oid;
if (git_oid_fromstr(&oid, (char *)buffer + strlen("parent ")) < 0)
return -1;
commit->parents[i] = git_revwalk__commit_lookup(walk, &oid);
if (commit->parents[i] == NULL)
return -1;
buffer += parent_len;
}
commit->out_degree = (unsigned short)parents;
if ((committer_start = buffer = memchr(buffer, '\n', buffer_end - buffer)) == NULL)
return commit_error(commit, "object is corrupted");
buffer++;
if ((buffer = memchr(buffer, '\n', buffer_end - buffer)) == NULL)
return commit_error(commit, "object is corrupted");
/* Skip trailing spaces */
while (buffer > committer_start && git__isspace(*buffer))
buffer--;
/* Seek for the begining of the pack of digits */
while (buffer > committer_start && git__isdigit(*buffer))
buffer--;
/* Skip potential timezone offset */
if ((buffer > committer_start) && (*buffer == '+' || *buffer == '-')) {
buffer--;
while (buffer > committer_start && git__isspace(*buffer))
buffer--;
while (buffer > committer_start && git__isdigit(*buffer))
buffer--;
}
if ((buffer == committer_start) || (git__strtol32(&commit_time, (char *)(buffer + 1), NULL, 10) < 0))
return commit_error(commit, "cannot parse commit time");
commit->time = (time_t)commit_time;
commit->parsed = 1;
return 0;
}
