Support 'diff=pgm' attribute

diff --git a/quote.c b/quote.c
index e3a4d4aef3478148ff89aebeba23e1cbf4202ba1..fb9e4ca253ea9bcadbcb55dcdd62be614c66758f 100644 (file)
--- a/quote.c
+++ b/quote.c
@@ -209,7 +209,7 @@ static int quote_c_style_counted(const char *name, int namelen,
                if (!ch)
                        break;
                if ((ch < ' ') || (ch == '"') || (ch == '\\') ||
-                   (ch == 0177)) {
+                   (ch >= 0177)) {
                        needquote = 1;
                        switch (ch) {
                        case '\a': EMITQ(); ch = 'a'; break;
@@ -349,3 +349,75 @@ void write_name_quoted(const char *prefix, int prefix_len,
        else
                goto no_quote;
 }
+
+/* quoting as a string literal for other languages */
+
+void perl_quote_print(FILE *stream, const char *src)
+{
+       const char sq = '\'';
+       const char bq = '\\';
+       char c;
+
+       fputc(sq, stream);
+       while ((c = *src++)) {
+               if (c == sq || c == bq)
+                       fputc(bq, stream);
+               fputc(c, stream);
+       }
+       fputc(sq, stream);
+}
+
+void python_quote_print(FILE *stream, const char *src)
+{
+       const char sq = '\'';
+       const char bq = '\\';
+       const char nl = '\n';
+       char c;
+
+       fputc(sq, stream);
+       while ((c = *src++)) {
+               if (c == nl) {
+                       fputc(bq, stream);
+                       fputc('n', stream);
+                       continue;
+               }
+               if (c == sq || c == bq)
+                       fputc(bq, stream);
+               fputc(c, stream);
+       }
+       fputc(sq, stream);
+}
+
+void tcl_quote_print(FILE *stream, const char *src)
+{
+       char c;
+
+       fputc('"', stream);
+       while ((c = *src++)) {
+               switch (c) {
+               case '[': case ']':
+               case '{': case '}':
+               case '$': case '\\': case '"':
+                       fputc('\\', stream);
+               default:
+                       fputc(c, stream);
+                       break;
+               case '\f':
+                       fputs("\\f", stream);
+                       break;
+               case '\r':
+                       fputs("\\r", stream);
+                       break;
+               case '\n':
+                       fputs("\\n", stream);
+                       break;
+               case '\t':
+                       fputs("\\t", stream);
+                       break;
+               case '\v':
+                       fputs("\\v", stream);
+                       break;
+               }
+       }
+       fputc('"', stream);
+}