* This is to extract the same name that appears on "diff --git" * line. We do not find and return anything if it is a rename * patch, and it is OK because we will find the name elsewhere. * We need to reliably find name only when it is mode-change only, * creation or deletion of an empty file. In any of these cases, * both sides are the same name under a/ and b/ respectively. */
| 1183 | * both sides are the same name under a/ and b/ respectively. |
| 1184 | */ |
| 1185 | static char *git_header_name(int p_value, |
| 1186 | const char *line, |
| 1187 | int llen) |
| 1188 | { |
| 1189 | const char *name; |
| 1190 | const char *second = NULL; |
| 1191 | size_t len, line_len; |
| 1192 | |
| 1193 | line += strlen("diff --git "); |
| 1194 | llen -= strlen("diff --git "); |
| 1195 | |
| 1196 | if (*line == '"') { |
| 1197 | const char *cp; |
| 1198 | struct strbuf first = STRBUF_INIT; |
| 1199 | struct strbuf sp = STRBUF_INIT; |
| 1200 | |
| 1201 | if (unquote_c_style(&first, line, &second)) |
| 1202 | goto free_and_fail1; |
| 1203 | |
| 1204 | /* strip the a/b prefix including trailing slash */ |
| 1205 | cp = skip_tree_prefix(p_value, first.buf, first.len); |
| 1206 | if (!cp) |
| 1207 | goto free_and_fail1; |
| 1208 | strbuf_remove(&first, 0, cp - first.buf); |
| 1209 | |
| 1210 | /* |
| 1211 | * second points at one past closing dq of name. |
| 1212 | * find the second name. |
| 1213 | */ |
| 1214 | while ((second < line + llen) && isspace(*second)) |
| 1215 | second++; |
| 1216 | |
| 1217 | if (line + llen <= second) |
| 1218 | goto free_and_fail1; |
| 1219 | if (*second == '"') { |
| 1220 | if (unquote_c_style(&sp, second, NULL)) |
| 1221 | goto free_and_fail1; |
| 1222 | cp = skip_tree_prefix(p_value, sp.buf, sp.len); |
| 1223 | if (!cp) |
| 1224 | goto free_and_fail1; |
| 1225 | /* They must match, otherwise ignore */ |
| 1226 | if (strcmp(cp, first.buf)) |
| 1227 | goto free_and_fail1; |
| 1228 | strbuf_release(&sp); |
| 1229 | return strbuf_detach(&first, NULL); |
| 1230 | } |
| 1231 | |
| 1232 | /* unquoted second */ |
| 1233 | cp = skip_tree_prefix(p_value, second, line + llen - second); |
| 1234 | if (!cp) |
| 1235 | goto free_and_fail1; |
| 1236 | if (line + llen - cp != first.len || |
| 1237 | memcmp(first.buf, cp, first.len)) |
| 1238 | goto free_and_fail1; |
| 1239 | return strbuf_detach(&first, NULL); |
| 1240 | |
| 1241 | free_and_fail1: |
| 1242 | strbuf_release(&first); |
no test coverage detected