X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=xdiff%2Fxutils.c;h=3653864e4bf704c024453df8d9abf26d89b4778d;hb=20f50f1670c18173d74a34527b0c538c3fbbfde3;hp=f91b4034751df72996afbe6b4b04a9f05638d322;hpb=69d830d1a3a1236036bd0f84dd9794d7c8d34b3f;p=git.git

diff --git a/xdiff/xutils.c b/xdiff/xutils.c
index f91b40347..3653864e4 100644
--- a/xdiff/xutils.c
+++ b/xdiff/xutils.c
@@ -186,12 +186,81 @@ long xdl_guess_lines(mmfile_t *mf) {
 	return nl + 1;
 }
 
+int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags)
+{
+	int i1, i2;
+
+	if (flags & XDF_IGNORE_WHITESPACE) {
+		for (i1 = i2 = 0; i1 < s1 && i2 < s2; ) {
+			if (isspace(l1[i1]))
+				while (isspace(l1[i1]) && i1 < s1)
+					i1++;
+			if (isspace(l2[i2]))
+				while (isspace(l2[i2]) && i2 < s2)
+					i2++;
+			if (i1 < s1 && i2 < s2 && l1[i1++] != l2[i2++])
+				return 0;
+		}
+		return (i1 >= s1 && i2 >= s2);
+	} else if (flags & XDF_IGNORE_WHITESPACE_CHANGE) {
+		for (i1 = i2 = 0; i1 < s1 && i2 < s2; ) {
+			if (isspace(l1[i1])) {
+				if (!isspace(l2[i2]))
+					return 0;
+				while (isspace(l1[i1]) && i1 < s1)
+					i1++;
+				while (isspace(l2[i2]) && i2 < s2)
+					i2++;
+			} else if (l1[i1++] != l2[i2++])
+				return 0;
+		}
+		return (i1 >= s1 && i2 >= s2);
+	} else if (flags & XDF_IGNORE_WHITESPACE_AT_EOL) {
+		for (i1 = i2 = 0; i1 < s1 && i2 < s2; ) {
+			if (l1[i1] != l2[i2]) {
+				while (i1 < s1 && isspace(l1[i1]))
+					i1++;
+				while (i2 < s2 && isspace(l2[i2]))
+					i2++;
+				if (i1 < s1 || i2 < s2)
+					return 0;
+				return 1;
+			}
+			i1++;
+			i2++;
+		}
+		return i1 >= s1 && i2 >= s2;
+	} else
+		return s1 == s2 && !memcmp(l1, l2, s1);
 
-unsigned long xdl_hash_record(char const **data, char const *top) {
+	return 0;
+}
+
+unsigned long xdl_hash_record(char const **data, char const *top, long flags) {
 	unsigned long ha = 5381;
 	char const *ptr = *data;
 
 	for (; ptr < top && *ptr != '\n'; ptr++) {
+		if (isspace(*ptr) && (flags & XDF_WHITESPACE_FLAGS)) {
+			const char *ptr2 = ptr;
+			while (ptr + 1 < top && isspace(ptr[1])
+					&& ptr[1] != '\n')
+				ptr++;
+			if (flags & XDF_IGNORE_WHITESPACE_CHANGE
+					&& ptr[1] != '\n') {
+				ha += (ha << 5);
+				ha ^= (unsigned long) ' ';
+			}
+			if (flags & XDF_IGNORE_WHITESPACE_AT_EOL
+					&& ptr[1] != '\n') {
+				while (ptr2 != ptr + 1) {
+					ha += (ha << 5);
+					ha ^= (unsigned long) *ptr2;
+					ptr2++;
+				}
+			}
+			continue;
+		}
 		ha += (ha << 5);
 		ha ^= (unsigned long) *ptr;
 	}