Add iconv_msg function.

1 files changed, 58 insertions, 0 deletions

@@ -6,6 +6,8 @@
  *   (see COPYING for full license text)
  */
 
+#include <iconv.h>
+
 #include "cgit.h"
 
 int next_char(FILE *f)
@@ -176,6 +178,62 @@ void cgit_parse_url(const char *url)
         }
 }
 
+static char *iconv_msg(char *msg, const char *encoding)
+{
+        iconv_t msg_conv = iconv_open(PAGE_ENCODING, encoding);
+        size_t inlen = strlen(msg);
+        char *in;
+        char *out;
+        size_t inleft;
+        size_t outleft;
+        char *buf;
+        char *ret;
+        size_t buf_sz;
+        int again, fail;
+
+        if(msg_conv == (iconv_t)-1)
+                return NULL;
+
+        buf_sz = inlen * 2;
+        buf = xmalloc(buf_sz+1);
+        do {
+                in = msg;
+                inleft = inlen;
+
+                out = buf;
+                outleft = buf_sz;
+                iconv(msg_conv, &in, &inleft, &out, &outleft);
+
+                if(inleft == 0) {
+                        fail = 0;
+                        again = 0;
+                } else if(inleft != 0 && errno == E2BIG) {
+                        fail = 0;
+                        again = 1;
+
+                        buf_sz *= 2;
+                        free(buf);
+                        buf = xmalloc(buf_sz+1);
+                } else {
+                        fail = 1;
+                        again = 0;
+                }
+        } while(again && !fail);
+
+        if(fail) {
+                free(buf);
+                ret = NULL;
+        } else {
+                buf = xrealloc(buf, out - buf);
+                *out = 0;
+                ret = buf;
+        }
+
+        iconv_close(msg_conv);
+
+        return ret;
+}
+
 char *substr(const char *head, const char *tail)
 {
         char *buf;