X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=xdiff-interface.c;h=10816e95a07c23dda7554c102c306d7e9beca606;hb=40250af411f33afa0c39a5d461829b676453ce3b;hp=0a66ded9533009a8efb840db5377f0abf5fccb1b;hpb=d9ea73e0564c7db8d791fe6b03c976ce57c9b079;p=git.git

diff --git a/xdiff-interface.c b/xdiff-interface.c
index 0a66ded95..10816e95a 100644
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -1,6 +1,52 @@
 #include "cache.h"
 #include "xdiff-interface.h"
 
+static int parse_num(char **cp_p, int *num_p)
+{
+	char *cp = *cp_p;
+	int num = 0;
+	int read_some;
+
+	while ('0' <= *cp && *cp <= '9')
+		num = num * 10 + *cp++ - '0';
+	if (!(read_some = cp - *cp_p))
+		return -1;
+	*cp_p = cp;
+	*num_p = num;
+	return 0;
+}
+
+int parse_hunk_header(char *line, int len,
+		      int *ob, int *on,
+		      int *nb, int *nn)
+{
+	char *cp;
+	cp = line + 4;
+	if (parse_num(&cp, ob)) {
+	bad_line:
+		return error("malformed diff output: %s", line);
+	}
+	if (*cp == ',') {
+		cp++;
+		if (parse_num(&cp, on))
+			goto bad_line;
+	}
+	else
+		*on = 1;
+	if (*cp++ != ' ' || *cp++ != '+')
+		goto bad_line;
+	if (parse_num(&cp, nb))
+		goto bad_line;
+	if (*cp == ',') {
+		cp++;
+		if (parse_num(&cp, nn))
+			goto bad_line;
+	}
+	else
+		*nn = 1;
+	return -!!memcmp(cp, " @@", 3);
+}
+
 static void consume_one(void *priv_, char *s, unsigned long size)
 {
 	struct xdiff_emit_state *priv = priv_;
@@ -23,9 +69,9 @@ int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf)
 	for (i = 0; i < nbuf; i++) {
 		if (mb[i].ptr[mb[i].size-1] != '\n') {
 			/* Incomplete line */
-			priv->remainder = realloc(priv->remainder,
-						  priv->remainder_size +
-						  mb[i].size);
+			priv->remainder = xrealloc(priv->remainder,
+						   priv->remainder_size +
+						   mb[i].size);
 			memcpy(priv->remainder + priv->remainder_size,
 			       mb[i].ptr, mb[i].size);
 			priv->remainder_size += mb[i].size;
@@ -37,9 +83,9 @@ int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf)
 			consume_one(priv, mb[i].ptr, mb[i].size);
 			continue;
 		}
-		priv->remainder = realloc(priv->remainder,
-					  priv->remainder_size +
-					  mb[i].size);
+		priv->remainder = xrealloc(priv->remainder,
+					   priv->remainder_size +
+					   mb[i].size);
 		memcpy(priv->remainder + priv->remainder_size,
 		       mb[i].ptr, mb[i].size);
 		consume_one(priv, priv->remainder,
@@ -56,3 +102,24 @@ int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf)
 	}
 	return 0;
 }
+
+int read_mmfile(mmfile_t *ptr, const char *filename)
+{
+	struct stat st;
+	FILE *f;
+	size_t sz;
+
+	if (stat(filename, &st))
+		return error("Could not stat %s", filename);
+	if ((f = fopen(filename, "rb")) == NULL)
+		return error("Could not open %s", filename);
+	sz = xsize_t(st.st_size);
+	ptr->ptr = xmalloc(sz);
+	if (fread(ptr->ptr, sz, 1, f) != 1)
+		return error("Could not read %s", filename);
+	fclose(f);
+	ptr->size = sz;
+	return 0;
+}
+
+