1 files changed, 33 insertions, 32 deletions

diff --git a/lib/libalpm/delta.c b/lib/libalpm/delta.c
index 6315a851..726f03c0 100644
--- a/lib/libalpm/delta.c
+++ b/lib/libalpm/delta.c
@@ -18,8 +18,6 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "config.h"
-
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h> /* intmax_t */
@@ -275,51 +273,54 @@ alpm_list_t SYMEXPORT *alpm_pkg_unused_deltas(alpm_pkg_t *pkg)
  * This function assumes that the string is in the correct format.
  * This format is as follows:
  * $deltafile $deltamd5 $deltasize $oldfile $newfile
+ * @param handle the context handle
  * @param line the string to parse
  * @return A pointer to the new alpm_delta_t object
  */
-/* TODO this does not really belong here, but in a parsing lib */
-alpm_delta_t *_alpm_delta_parse(char *line)
+alpm_delta_t *_alpm_delta_parse(alpm_handle_t *handle, const char *line)
 {
 	alpm_delta_t *delta;
-	char *tmp = line, *tmp2;
-	regex_t reg;
-
-	regcomp(&reg,
-			"^[^[:space:]]* [[:xdigit:]]{32} [[:digit:]]*"
-			" [^[:space:]]* [^[:space:]]*$",
-			REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
-	if(regexec(&reg, line, 0, 0, 0) != 0) {
+	const int num_matches = 6;
+	size_t len;
+	regmatch_t pmatch[num_matches];
+	char filesize[32];
+
+	/* this is so we only have to compile the pattern once */
+	if(!handle->delta_regex_compiled) {
+		/* $deltafile $deltamd5 $deltasize $oldfile $newfile*/
+		regcomp(&handle->delta_regex,
+				"^([^[:space:]]+) ([[:xdigit:]]{32}) ([[:digit:]]+)"
+				" ([^[:space:]]+) ([^[:space:]]+)$",
+				REG_EXTENDED | REG_NEWLINE);
+		handle->delta_regex_compiled = 1;
+	}
+
+	if(regexec(&handle->delta_regex, line, num_matches, pmatch, 0) != 0) {
 		/* delta line is invalid, return NULL */
-		regfree(&reg);
 		return NULL;
 	}
-	regfree(&reg);
 
 	CALLOC(delta, 1, sizeof(alpm_delta_t), return NULL);
 
-	tmp2 = tmp;
-	tmp = strchr(tmp, ' ');
-	*(tmp++) = '\0';
-	STRDUP(delta->delta, tmp2, return NULL);
+	/* start at index 1 -- match 0 is the entire match */
+	len = pmatch[1].rm_eo - pmatch[1].rm_so;
+	STRNDUP(delta->delta, &line[pmatch[1].rm_so], len, return NULL);
 
-	tmp2 = tmp;
-	tmp = strchr(tmp, ' ');
-	*(tmp++) = '\0';
-	STRDUP(delta->delta_md5, tmp2, return NULL);
+	len = pmatch[2].rm_eo - pmatch[2].rm_so;
+	STRNDUP(delta->delta_md5, &line[pmatch[2].rm_so], len, return NULL);
 
-	tmp2 = tmp;
-	tmp = strchr(tmp, ' ');
-	*(tmp++) = '\0';
-	delta->delta_size = _alpm_strtoofft(tmp2);
+	len = pmatch[3].rm_eo - pmatch[3].rm_so;
+	if(len < sizeof(filesize)) {
+		strncpy(filesize, &line[pmatch[3].rm_so], len);
+		filesize[len] = '\0';
+		delta->delta_size = _alpm_strtoofft(filesize);
+	}
 
-	tmp2 = tmp;
-	tmp = strchr(tmp, ' ');
-	*(tmp++) = '\0';
-	STRDUP(delta->from, tmp2, return NULL);
+	len = pmatch[4].rm_eo - pmatch[4].rm_so;
+	STRNDUP(delta->from, &line[pmatch[4].rm_so], len, return NULL);
 
-	tmp2 = tmp;
-	STRDUP(delta->to, tmp2, return NULL);
+	len = pmatch[5].rm_eo - pmatch[5].rm_so;
+	STRNDUP(delta->to, &line[pmatch[5].rm_so], len, return NULL);
 
 	return delta;
 }