t1308: relax the test verifying that empty alias values are disallowed

diff --git a/diff.c b/diff.c
index 58cb72d7e72a85bad9ae9fe8a198fef1cb1b15f8..74283d9001fbc48d11ba5c449ea7c16692791c88 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -398,7 +398,7 @@ static struct diff_tempfile {
         */
        const char *name;
 
-       char hex[GIT_SHA1_HEXSZ + 1];
+       char hex[GIT_MAX_HEXSZ + 1];
        char mode[10];
 
        /*
@@ -911,7 +911,7 @@ static int fn_out_diff_words_write_helper(FILE *fp,
 /*
  * '--color-words' algorithm can be described as:
  *
- *   1. collect a the minus/plus lines of a diff hunk, divided into
+ *   1. collect the minus/plus lines of a diff hunk, divided into
  *      minus-lines and plus-lines;
  *
  *   2. break both minus-lines and plus-lines into words and
@@ -4219,7 +4219,7 @@ const char *diff_aligned_abbrev(const struct object_id *oid, int len)
         * uniqueness across all objects (statistically speaking).
         */
        if (abblen < GIT_SHA1_HEXSZ - 3) {
-               static char hex[GIT_SHA1_HEXSZ + 1];
+               static char hex[GIT_MAX_HEXSZ + 1];
                if (len < abblen && abblen <= len + 2)
                        xsnprintf(hex, sizeof(hex), "%s%.*s", abbrev, len+3-abblen, "..");
                else
@@ -4570,6 +4570,19 @@ static void patch_id_consume(void *priv, char *line, unsigned long len)
        data->patchlen += new_len;
 }
 
+static void patch_id_add_string(git_SHA_CTX *ctx, const char *str)
+{
+       git_SHA1_Update(ctx, str, strlen(str));
+}
+
+static void patch_id_add_mode(git_SHA_CTX *ctx, unsigned mode)
+{
+       /* large enough for 2^32 in octal */
+       char buf[12];
+       int len = xsnprintf(buf, sizeof(buf), "%06o", mode);
+       git_SHA1_Update(ctx, buf, len);
+}
+
 /* returns 0 upon success, and writes result into sha1 */
 static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1, int diff_header_only)
 {
@@ -4577,7 +4590,6 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1,
        int i;
        git_SHA_CTX ctx;
        struct patch_id_t data;
-       char buffer[PATH_MAX * 4 + 20];
 
        git_SHA1_Init(&ctx);
        memset(&data, 0, sizeof(struct patch_id_t));
@@ -4609,36 +4621,30 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1,
 
                len1 = remove_space(p->one->path, strlen(p->one->path));
                len2 = remove_space(p->two->path, strlen(p->two->path));
-               if (p->one->mode == 0)
-                       len1 = snprintf(buffer, sizeof(buffer),
-                                       "diff--gita/%.*sb/%.*s"
-                                       "newfilemode%06o"
-                                       "---/dev/null"
-                                       "+++b/%.*s",
-                                       len1, p->one->path,
-                                       len2, p->two->path,
-                                       p->two->mode,
-                                       len2, p->two->path);
-               else if (p->two->mode == 0)
-                       len1 = snprintf(buffer, sizeof(buffer),
-                                       "diff--gita/%.*sb/%.*s"
-                                       "deletedfilemode%06o"
-                                       "---a/%.*s"
-                                       "+++/dev/null",
-                                       len1, p->one->path,
-                                       len2, p->two->path,
-                                       p->one->mode,
-                                       len1, p->one->path);
-               else
-                       len1 = snprintf(buffer, sizeof(buffer),
-                                       "diff--gita/%.*sb/%.*s"
-                                       "---a/%.*s"
-                                       "+++b/%.*s",
-                                       len1, p->one->path,
-                                       len2, p->two->path,
-                                       len1, p->one->path,
-                                       len2, p->two->path);
-               git_SHA1_Update(&ctx, buffer, len1);
+               patch_id_add_string(&ctx, "diff--git");
+               patch_id_add_string(&ctx, "a/");
+               git_SHA1_Update(&ctx, p->one->path, len1);
+               patch_id_add_string(&ctx, "b/");
+               git_SHA1_Update(&ctx, p->two->path, len2);
+
+               if (p->one->mode == 0) {
+                       patch_id_add_string(&ctx, "newfilemode");
+                       patch_id_add_mode(&ctx, p->two->mode);
+                       patch_id_add_string(&ctx, "---/dev/null");
+                       patch_id_add_string(&ctx, "+++b/");
+                       git_SHA1_Update(&ctx, p->two->path, len2);
+               } else if (p->two->mode == 0) {
+                       patch_id_add_string(&ctx, "deletedfilemode");
+                       patch_id_add_mode(&ctx, p->one->mode);
+                       patch_id_add_string(&ctx, "---a/");
+                       git_SHA1_Update(&ctx, p->one->path, len1);
+                       patch_id_add_string(&ctx, "+++/dev/null");
+               } else {
+                       patch_id_add_string(&ctx, "---a/");
+                       git_SHA1_Update(&ctx, p->one->path, len1);
+                       patch_id_add_string(&ctx, "+++b/");
+                       git_SHA1_Update(&ctx, p->two->path, len2);
+               }
 
                if (diff_header_only)
                        continue;