Add strbuf_add_wrapped_text() to utf8.[ch]

[thirdparty/git.git] / utf8.c

diff --git a/utf8.c b/utf8.c
index db706ac4ed6f033091cfaeb7b23c07ca7fd71675..da996695ccf06315f10f9c837d62784f1c34ed05 100644 (file)
--- a/utf8.c
+++ b/utf8.c
@@ -1,4 +1,5 @@
 #include "git-compat-util.h"
+#include "strbuf.h"
 #include "utf8.h"
 
 /* This code is originally from http://www.cl.cam.ac.uk/~mgk25/ucs/ */
@@ -279,14 +280,22 @@ int is_utf8(const char *text)
        return 1;
 }
 
-static void print_spaces(int count)
+static inline void strbuf_write(struct strbuf *sb, const char *buf, int len)
+{
+       if (sb)
+               strbuf_insert(sb, sb->len, buf, len);
+       else
+               fwrite(buf, len, 1, stdout);
+}
+
+static void print_spaces(struct strbuf *buf, int count)
 {
        static const char s[] = "                    ";
        while (count >= sizeof(s)) {
-               fwrite(s, sizeof(s) - 1, 1, stdout);
+               strbuf_write(buf, s, sizeof(s) - 1);
                count -= sizeof(s) - 1;
        }
-       fwrite(s, count, 1, stdout);
+       strbuf_write(buf, s, count);
 }
 
 /*
@@ -295,7 +304,8 @@ static void print_spaces(int count)
  * If indent is negative, assume that already -indent columns have been
  * consumed (and no extra indent is necessary for the first line).
  */
-int print_wrapped_text(const char *text, int indent, int indent2, int width)
+int strbuf_add_wrapped_text(struct strbuf *buf,
+               const char *text, int indent, int indent2, int width)
 {
        int w = indent, assume_utf8 = is_utf8(text);
        const char *bol = text, *space = NULL;
@@ -310,21 +320,35 @@ int print_wrapped_text(const char *text, int indent, int indent2, int width)
                if (!c || isspace(c)) {
                        if (w < width || !space) {
                                const char *start = bol;
+                               if (!c && text == start)
+                                       return w;
                                if (space)
                                        start = space;
                                else
-                                       print_spaces(indent);
-                               fwrite(start, text - start, 1, stdout);
+                                       print_spaces(buf, indent);
+                               strbuf_write(buf, start, text - start);
                                if (!c)
                                        return w;
-                               else if (c == '\t')
-                                       w |= 0x07;
                                space = text;
+                               if (c == '\t')
+                                       w |= 0x07;
+                               else if (c == '\n') {
+                                       space++;
+                                       if (*space == '\n') {
+                                               strbuf_write(buf, "\n", 1);
+                                               goto new_line;
+                                       }
+                                       else if (!isalnum(*space))
+                                               goto new_line;
+                                       else
+                                               strbuf_write(buf, " ", 1);
+                               }
                                w++;
                                text++;
                        }
                        else {
-                               putchar('\n');
+new_line:
+                               strbuf_write(buf, "\n", 1);
                                text = bol = space + isspace(*space);
                                space = NULL;
                                w = indent = indent2;
@@ -340,6 +364,11 @@ int 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)
+{
+       return strbuf_add_wrapped_text(NULL, text, indent, indent2, width);
+}
+
 int is_encoding_utf8(const char *name)
 {
        if (!name)