diff options
Diffstat (limited to 'builtin/apply.c')
| -rw-r--r-- | builtin/apply.c | 68 |
1 files changed, 43 insertions, 25 deletions
diff --git a/builtin/apply.c b/builtin/apply.c index 3bf71dc452..ca8695ad31 100644 --- a/builtin/apply.c +++ b/builtin/apply.c @@ -1095,15 +1095,23 @@ static int gitdiff_unrecognized(const char *line, struct patch *patch) return -1; } -static const char *stop_at_slash(const char *line, int llen) +/* + * Skip p_value leading components from "line"; as we do not accept + * absolute paths, return NULL in that case. + */ +static const char *skip_tree_prefix(const char *line, int llen) { - int nslash = p_value; + int nslash; int i; + if (!p_value) + return (llen && line[0] == '/') ? NULL : line; + + nslash = p_value; for (i = 0; i < llen; i++) { int ch = line[i]; if (ch == '/' && --nslash <= 0) - return &line[i]; + return (i == 0) ? NULL : &line[i + 1]; } return NULL; } @@ -1133,12 +1141,11 @@ static char *git_header_name(const char *line, int llen) if (unquote_c_style(&first, line, &second)) goto free_and_fail1; - /* advance to the first slash */ - cp = stop_at_slash(first.buf, first.len); - /* we do not accept absolute paths */ - if (!cp || cp == first.buf) + /* strip the a/b prefix including trailing slash */ + cp = skip_tree_prefix(first.buf, first.len); + if (!cp) goto free_and_fail1; - strbuf_remove(&first, 0, cp + 1 - first.buf); + strbuf_remove(&first, 0, cp - first.buf); /* * second points at one past closing dq of name. @@ -1152,22 +1159,21 @@ static char *git_header_name(const char *line, int llen) if (*second == '"') { if (unquote_c_style(&sp, second, NULL)) goto free_and_fail1; - cp = stop_at_slash(sp.buf, sp.len); - if (!cp || cp == sp.buf) + cp = skip_tree_prefix(sp.buf, sp.len); + if (!cp) goto free_and_fail1; /* They must match, otherwise ignore */ - if (strcmp(cp + 1, first.buf)) + if (strcmp(cp, first.buf)) goto free_and_fail1; strbuf_release(&sp); return strbuf_detach(&first, NULL); } /* unquoted second */ - cp = stop_at_slash(second, line + llen - second); - if (!cp || cp == second) + cp = skip_tree_prefix(second, line + llen - second); + if (!cp) goto free_and_fail1; - cp++; - if (line + llen - cp != first.len + 1 || + if (line + llen - cp != first.len || memcmp(first.buf, cp, first.len)) goto free_and_fail1; return strbuf_detach(&first, NULL); @@ -1179,10 +1185,9 @@ static char *git_header_name(const char *line, int llen) } /* unquoted first name */ - name = stop_at_slash(line, llen); - if (!name || name == line) + name = skip_tree_prefix(line, llen); + if (!name) return NULL; - name++; /* * since the first name is unquoted, a dq if exists must be @@ -1196,10 +1201,9 @@ static char *git_header_name(const char *line, int llen) if (unquote_c_style(&sp, second, NULL)) goto free_and_fail2; - np = stop_at_slash(sp.buf, sp.len); - if (!np || np == sp.buf) + np = skip_tree_prefix(sp.buf, sp.len); + if (!np) goto free_and_fail2; - np++; len = sp.buf + sp.len - np; if (len < second - name && @@ -1231,13 +1235,27 @@ static char *git_header_name(const char *line, int llen) case '\n': return NULL; case '\t': case ' ': - second = stop_at_slash(name + len, line_len - len); + /* + * Is this the separator between the preimage + * and the postimage pathname? Again, we are + * only interested in the case where there is + * no rename, as this is only to set def_name + * and a rename patch has the names elsewhere + * in an unambiguous form. + */ + if (!name[len + 1]) + return NULL; /* no postimage name */ + second = skip_tree_prefix(name + len + 1, + line_len - (len + 1)); if (!second) return NULL; - second++; - if (second[len] == '\n' && !strncmp(name, second, len)) { + /* + * Does len bytes starting at "name" and "second" + * (that are separated by one HT or SP we just + * found) exactly match? + */ + if (second[len] == '\n' && !strncmp(name, second, len)) return xmemdupz(name, len); - } } } } |