Add special string comparer for gracefully parsing ~/.tigrc identifiers

diff --git a/tig.c b/tig.c
index 3bf5a25313d89a5a60075486147b5a6ddd78868b..626fcd5fd1ca49e8dfc89d1ae29c09f5a0e10edd 100644 (file)
--- a/tig.c
+++ b/tig.c
@@ -178,6 +178,28 @@ string_nformat(char *buf, size_t bufsize, int *bufpos, const char *fmt, ...)
 #define string_format_from(buf, from, fmt, args...) \
        string_nformat(buf, sizeof(buf), from, fmt, args)
 
+static int
+string_enum_compare(const char *str1, const char *str2, int len)
+{
+       size_t i;
+
+#define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
+
+       /* Diff-Header == DIFF_HEADER */
+       for (i = 0; i < len; i++) {
+               if (toupper(str1[i]) == toupper(str2[i]))
+                       continue;
+
+               if (string_enum_sep(str1[i]) &&
+                   string_enum_sep(str2[i]))
+                       continue;
+
+               return str1[i] - str2[i];
+       }
+
+       return 0;
+}
+
 /* Shell quoting
  *
  * NOTE: The following is a slightly modified copy of the git project's shell
@@ -552,19 +574,10 @@ static struct line_info *
 get_line_info(char *name, int namelen)
 {
        enum line_type type;
-       int i;
-
-       /* Diff-Header -> DIFF_HEADER */
-       for (i = 0; i < namelen; i++) {
-               if (name[i] == '-')
-                       name[i] = '_';
-               else if (name[i] == '.')
-                       name[i] = '_';
-       }
 
        for (type = 0; type < ARRAY_SIZE(line_info); type++)
                if (namelen == line_info[type].namelen &&
-                   !strncasecmp(line_info[type].name, name, namelen))
+                   !string_enum_compare(line_info[type].name, name, namelen))
                        return &line_info[type];
 
        return NULL;