refactor userdiff textconv code

diff --git a/alias.c b/alias.c
index 116cac87c37eea27b9fc7aa41c5889fbf66057a5..ccb1108c94436035d0da8b1d6f08f859b68294a3 100644 (file)
--- a/alias.c
+++ b/alias.c
@@ -2,7 +2,8 @@
 
 static const char *alias_key;
 static char *alias_val;
-static int alias_lookup_cb(const char *k, const char *v)
+
+static int alias_lookup_cb(const char *k, const char *v, void *cb)
 {
        if (!prefixcmp(k, "alias.") && !strcmp(k+6, alias_key)) {
                if (!v)
@@ -17,6 +18,60 @@ char *alias_lookup(const char *alias)
 {
        alias_key = alias;
        alias_val = NULL;
-       git_config(alias_lookup_cb);
+       git_config(alias_lookup_cb, NULL);
        return alias_val;
 }
+
+int split_cmdline(char *cmdline, const char ***argv)
+{
+       int src, dst, count = 0, size = 16;
+       char quoted = 0;
+
+       *argv = xmalloc(sizeof(char*) * size);
+
+       /* split alias_string */
+       (*argv)[count++] = cmdline;
+       for (src = dst = 0; cmdline[src];) {
+               char c = cmdline[src];
+               if (!quoted && isspace(c)) {
+                       cmdline[dst++] = 0;
+                       while (cmdline[++src]
+                                       && isspace(cmdline[src]))
+                               ; /* skip */
+                       if (count >= size) {
+                               size += 16;
+                               *argv = xrealloc(*argv, sizeof(char*) * size);
+                       }
+                       (*argv)[count++] = cmdline + dst;
+               } else if (!quoted && (c == '\'' || c == '"')) {
+                       quoted = c;
+                       src++;
+               } else if (c == quoted) {
+                       quoted = 0;
+                       src++;
+               } else {
+                       if (c == '\\' && quoted != '\'') {
+                               src++;
+                               c = cmdline[src];
+                               if (!c) {
+                                       free(*argv);
+                                       *argv = NULL;
+                                       return error("cmdline ends with \\");
+                               }
+                       }
+                       cmdline[dst++] = c;
+                       src++;
+               }
+       }
+
+       cmdline[dst] = 0;
+
+       if (quoted) {
+               free(*argv);
+               *argv = NULL;
+               return error("unclosed quote");
+       }
+
+       return count;
+}
+