mergetool: Add support for vimdiff.

diff --git a/utf8.c b/utf8.c
index 1eedd8b61aeed9867366df0b70ac849cdef985b9..a2965c9c1106b7e772d9b53c8885d86320d18f07 100644 (file)
--- a/utf8.c
+++ b/utf8.c
@@ -3,13 +3,15 @@
 
 /* This code is originally from http://www.cl.cam.ac.uk/~mgk25/ucs/ */
 
+typedef unsigned int ucs_char_t;  /* assuming 32bit int */
+
 struct interval {
   int first;
   int last;
 };
 
 /* auxiliary function for binary search in interval table */
-static int bisearch(wchar_t ucs, const struct interval *table, int max) {
+static int bisearch(ucs_char_t ucs, const struct interval *table, int max) {
        int min = 0;
        int mid;
 
@@ -56,11 +58,11 @@ static int bisearch(wchar_t ucs, const struct interval *table, int max) {
  *      ISO 8859-1 and WGL4 characters, Unicode control characters,
  *      etc.) have a column width of 1.
  *
- * This implementation assumes that wchar_t characters are encoded
+ * This implementation assumes that ucs_char_t characters are encoded
  * in ISO 10646.
  */
 
-static int wcwidth(wchar_t ch)
+static int wcwidth(ucs_char_t ch)
 {
        /*
         * Sorted list of non-overlapping intervals of non-spacing characters,
@@ -157,7 +159,7 @@ static int wcwidth(wchar_t ch)
 int utf8_width(const char **start)
 {
        unsigned char *s = (unsigned char *)*start;
-       wchar_t ch;
+       ucs_char_t ch;
 
        if (*s < 0x80) {
                /* 0xxxxxxx */
@@ -235,12 +237,19 @@ static void print_spaces(int count)
 /*
  * Wrap the text, if necessary. The variable indent is the indent for the
  * first line, indent2 is the indent for all other lines.
+ * If indent is negative, assume that already -indent columns have been
+ * consumed (and no extra indent is necessary for the first line).
  */
-void print_wrapped_text(const char *text, int indent, int indent2, int width)
+int print_wrapped_text(const char *text, int indent, int indent2, int width)
 {
        int w = indent, assume_utf8 = is_utf8(text);
        const char *bol = text, *space = NULL;
 
+       if (indent < 0) {
+               w = -indent;
+               space = text;
+       }
+
        for (;;) {
                char c = *text;
                if (!c || isspace(c)) {
@@ -251,10 +260,9 @@ void print_wrapped_text(const char *text, int indent, int indent2, int width)
                                else
                                        print_spaces(indent);
                                fwrite(start, text - start, 1, stdout);
-                               if (!c) {
-                                       putchar('\n');
-                                       return;
-                               } else if (c == '\t')
+                               if (!c)
+                                       return w;
+                               else if (c == '\t')
                                        w |= 0x07;
                                space = text;
                                w++;
@@ -262,7 +270,7 @@ void print_wrapped_text(const char *text, int indent, int indent2, int width)
                        }
                        else {
                                putchar('\n');
-                               text = bol = space + 1;
+                               text = bol = space + isspace(*space);
                                space = NULL;
                                w = indent = indent2;
                        }
@@ -275,6 +283,16 @@ void print_wrapped_text(const char *text, int indent, int indent2, int width)
                        text++;
                }
        }
+       return w;
+}
+
+int is_encoding_utf8(const char *name)
+{
+       if (!name)
+               return 1;
+       if (!strcasecmp(name, "utf-8") || !strcasecmp(name, "utf8"))
+               return 1;
+       return 0;
 }
 
 /*
@@ -282,11 +300,17 @@ void print_wrapped_text(const char *text, int indent, int indent2, int width)
  * with iconv.  If the conversion fails, returns NULL.
  */
 #ifndef NO_ICONV
+#ifdef OLD_ICONV
+       typedef const char * iconv_ibp;
+#else
+       typedef char * iconv_ibp;
+#endif
 char *reencode_string(const char *in, const char *out_encoding, const char *in_encoding)
 {
        iconv_t conv;
        size_t insz, outsz, outalloc;
-       char *out, *outpos, *cp;
+       char *out, *outpos;
+       iconv_ibp cp;
 
        if (!in_encoding)
                return NULL;
@@ -298,7 +322,7 @@ char *reencode_string(const char *in, const char *out_encoding, const char *in_e
        outalloc = outsz + 1; /* for terminating NUL */
        out = xmalloc(outalloc);
        outpos = out;
-       cp = (char *)in;
+       cp = (iconv_ibp)in;
 
        while (1) {
                size_t cnt = iconv(conv, &cp, &insz, &outpos, &outsz);