blame: show "previous" information in --porcelain/--incremental format

diff --git a/strbuf.c b/strbuf.c
index 4aed75265e945d7b8dfafb36913006376768b4d3..720737d856b694bc5239f0c18af372959c99e744 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -60,6 +60,18 @@ void strbuf_grow(struct strbuf *sb, size_t extra)
        ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
 }
 
+void strbuf_trim(struct strbuf *sb)
+{
+       char *b = sb->buf;
+       while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
+               sb->len--;
+       while (sb->len > 0 && isspace(*b)) {
+               b++;
+               sb->len--;
+       }
+       memmove(sb->buf, b, sb->len);
+       sb->buf[sb->len] = '\0';
+}
 void strbuf_rtrim(struct strbuf *sb)
 {
        while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
@@ -67,7 +79,65 @@ void strbuf_rtrim(struct strbuf *sb)
        sb->buf[sb->len] = '\0';
 }
 
-int strbuf_cmp(struct strbuf *a, struct strbuf *b)
+void strbuf_ltrim(struct strbuf *sb)
+{
+       char *b = sb->buf;
+       while (sb->len > 0 && isspace(*b)) {
+               b++;
+               sb->len--;
+       }
+       memmove(sb->buf, b, sb->len);
+       sb->buf[sb->len] = '\0';
+}
+
+void strbuf_tolower(struct strbuf *sb)
+{
+       int i;
+       for (i = 0; i < sb->len; i++)
+               sb->buf[i] = tolower(sb->buf[i]);
+}
+
+struct strbuf **strbuf_split(const struct strbuf *sb, int delim)
+{
+       int alloc = 2, pos = 0;
+       char *n, *p;
+       struct strbuf **ret;
+       struct strbuf *t;
+
+       ret = xcalloc(alloc, sizeof(struct strbuf *));
+       p = n = sb->buf;
+       while (n < sb->buf + sb->len) {
+               int len;
+               n = memchr(n, delim, sb->len - (n - sb->buf));
+               if (pos + 1 >= alloc) {
+                       alloc = alloc * 2;
+                       ret = xrealloc(ret, sizeof(struct strbuf *) * alloc);
+               }
+               if (!n)
+                       n = sb->buf + sb->len - 1;
+               len = n - p + 1;
+               t = xmalloc(sizeof(struct strbuf));
+               strbuf_init(t, len);
+               strbuf_add(t, p, len);
+               ret[pos] = t;
+               ret[++pos] = NULL;
+               p = ++n;
+       }
+       return ret;
+}
+
+void strbuf_list_free(struct strbuf **sbs)
+{
+       struct strbuf **s = sbs;
+
+       while (*s) {
+               strbuf_release(*s);
+               free(*s++);
+       }
+       free(sbs);
+}
+
+int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
 {
        int cmp;
        if (a->len < b->len) {