Add test case for git-config-set

[git.git] / quote.c

diff --git a/quote.c b/quote.c
index 009e694..e662a7d 100644 (file)
--- a/quote.c
+++ b/quote.c
@@ -15,6 +15,11 @@
 #undef EMIT
 #define EMIT(x) ( (++len < n) && (*bp++ = (x)) )
 
+static inline int need_bs_quote(char c)
+{
+       return (c == '\'' || c == '!');
+}
+
 size_t sq_quote_buf(char *dst, size_t n, const char *src)
 {
        char c;
@@ -23,7 +28,7 @@ size_t sq_quote_buf(char *dst, size_t n, const char *src)
 
        EMIT('\'');
        while ((c = *src++)) {
-               if (c == '\'' || c == '!') {
+               if (need_bs_quote(c)) {
                        EMIT('\'');
                        EMIT('\\');
                        EMIT(c);
@@ -52,6 +57,40 @@ char *sq_quote(const char *src)
        return buf;
 }
 
+char *sq_dequote(char *arg)
+{
+       char *dst = arg;
+       char *src = arg;
+       char c;
+
+       if (*src != '\'')
+               return NULL;
+       for (;;) {
+               c = *++src;
+               if (!c)
+                       return NULL;
+               if (c != '\'') {
+                       *dst++ = c;
+                       continue;
+               }
+               /* We stepped out of sq */
+               switch (*++src) {
+               case '\0':
+                       *dst = 0;
+                       return arg;
+               case '\\':
+                       c = *++src;
+                       if (need_bs_quote(c) && *++src == '\'') {
+                               *dst++ = c;
+                               continue;
+                       }
+               /* Fallthrough */
+               default:
+                       return NULL;
+               }
+       }
+}
+
 /*
  * C-style name quoting.
  *