X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/f0c20432f8c9dffd049c785f21cc85d98ff628fd..refs/heads/master:/lib/charset.c

diff --git a/lib/charset.c b/lib/charset.c
index fbcf275..b8af6e6 100644
--- a/lib/charset.c
+++ b/lib/charset.c
@@ -1,31 +1,31 @@
 /*
  * This file is part of DisOrder.
- * Copyright (C) 2004, 2005 Richard Kettlewell
+ * Copyright (C) 2004, 2005, 2007, 2008, 2013 Richard Kettlewell
  *
- * This program is free software; you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 /** @file lib/charset.c @brief Character set conversion */
 
-#include <config.h>
-#include "types.h"
+#include "common.h"
 
-#include <iconv.h>
-#include <string.h>
+#if HAVE_ICONV_H
+# include <iconv.h>
+#endif
 #include <errno.h>
-#include <langinfo.h>
+#if HAVE_LANGINFO_H
+# include <langinfo.h>
+#endif
 
 #include "mem.h"
 #include "log.h"
@@ -34,6 +34,17 @@
 #include "vector.h"
 #include "unicode.h"
 
+#if _WIN32
+// TODO WIN32 we assume UTF-8 here, which is *definitely wrong*
+char *mb2utf8(const char *mb) {
+  return xstrdup(mb);
+}
+
+char *utf82mb(const char *utf8) {
+  return xstrdup(utf8);
+}
+#else
+
 /** @brief Low-level converstion routine
  * @param from Source encoding
  * @param to Destination encoding
@@ -49,7 +60,7 @@ static void *convert(const char *from, const char *to,
   size_t bufsize = 0, sl, dl;
 
   if((i = iconv_open(to, from)) == (iconv_t)-1)
-    fatal(errno, "error calling iconv_open");
+    disorder_fatal(errno, "error calling iconv_open");
   do {
     bufsize = bufsize ? 2 * bufsize : 32;
     buf = xrealloc_noptr(buf, bufsize);
@@ -63,34 +74,53 @@ static void *convert(const char *from, const char *to,
   } while(len == (size_t)-1 && errno == E2BIG);
   iconv_close(i);
   if(len == (size_t)-1) {
-    error(errno, "error converting from %s to %s", from, to);
+    disorder_error(errno, "error converting from %s to %s", from, to);
     return 0;
   }
   return buf;
 }
 
-/** @brief Convert from the local multibyte encoding to UTF-8 */
+/** @brief Convert from the local multibyte encoding to UTF-8
+ * @param mb String in current locale's multibyte encoding
+ * @return Same string in UTF-8
+ */
 char *mb2utf8(const char *mb) {
   return convert(nl_langinfo(CODESET), "UTF-8", mb, strlen(mb) + 1);
 }
 
-/** @brief Convert from UTF-8 to the local multibyte encoding */
+/** @brief Convert from UTF-8 to the local multibyte encoding
+ * @param utf8 String in UTF-8
+ * @return Same string in current locale's multibyte encoding
+ */
 char *utf82mb(const char *utf8) {
   return convert("UTF-8", nl_langinfo(CODESET), utf8, strlen(utf8) + 1);
 }
 
-/** @brief Convert from encoding @p from to UTF-8 */
+/** @brief Convert from encoding @p from to UTF-8
+ * @param from Source encoding
+ * @param any String in encoding @p from
+ * @return @p any converted to UTF-8
+ */
 char *any2utf8(const char *from, const char *any) {
   return convert(from, "UTF-8", any, strlen(any) + 1);
 }
 
-/** @brief Convert from encoding @p from to the local multibyte encoding */
+/** @brief Convert from encoding @p from to the local multibyte encoding
+ * @param from Source encoding
+ * @param any String in encoding @p from
+ * @return @p any converted to current locale's multibyte encoding
+ */
 char *any2mb(const char *from, const char *any) {
   if(from) return convert(from, nl_langinfo(CODESET), any, strlen(any) + 1);
   else return xstrdup(any);
 }
 
-/** @brief Convert from encoding @p from to encoding @p to */
+/** @brief Convert from encoding @p from to encoding @p to
+ * @param from Source encoding
+ * @param to Destination encoding
+ * @param any String in encoding @p from
+ * @return @p any converted to encoding @p to
+ */
 char *any2any(const char *from,
 	      const char *to,
 	      const char *any) {
@@ -98,6 +128,8 @@ char *any2any(const char *from,
   else return xstrdup(any);
 }
 
+#endif
+
 /** @brief Truncate a string for display purposes
  * @param s Pointer to UTF-8 string
  * @param max Maximum number of columns
@@ -115,20 +147,22 @@ const char *truncate_for_display(const char *s, long max) {
   uint32_t *s32;
   size_t l32, cut;
   utf32_iterator it;
+  long graphemes;
 
   /* Convert to UTF-32 for processing */
   if(!(s32 = utf8_to_utf32(s, strlen(s), &l32)))
     return 0;
   it = utf32_iterator_new(s32, l32);
   cut = l32;
-  while(max && utf32_iterator_where(it) < l32) {
+  graphemes = 0;                        /* # of graphemes left of it */
+  while(graphemes <= max && utf32_iterator_where(it) < l32) {
+    if(graphemes == max - 1)
+      cut = utf32_iterator_where(it);
     utf32_iterator_advance(it, 1);
     if(utf32_iterator_grapheme_boundary(it))
-      --max;
-    if(max == 1)
-      cut = utf32_iterator_where(it);
+      ++graphemes;
   }
-  if(max == 0) {                        /* we need to cut */
+  if(graphemes > max) {                 /* we need to cut */
     s32[cut] = 0x2026;                  /* HORIZONTAL ELLIPSIS */
     l32 = cut + 1;
     s = utf32_to_utf8(s32, l32, 0);