xdiff/xhistogram: move index allocation into find_lcs

diff --git a/strbuf.c b/strbuf.c
index 2c08dbb15381351ede663c1d41ebf3b6838a0c12..b839be491b74a034cf848d2dd043aba7d75b7b92 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -187,7 +187,7 @@ void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
 
 void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
 {
-       strbuf_splice(sb, pos, len, NULL, 0);
+       strbuf_splice(sb, pos, len, "", 0);
 }
 
 void strbuf_add(struct strbuf *sb, const void *data, size_t len)
@@ -197,6 +197,13 @@ void strbuf_add(struct strbuf *sb, const void *data, size_t len)
        strbuf_setlen(sb, sb->len + len);
 }
 
+void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2)
+{
+       strbuf_grow(sb, sb2->len);
+       memcpy(sb->buf + sb->len, sb2->buf, sb2->len);
+       strbuf_setlen(sb, sb->len + sb2->len);
+}
+
 void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
 {
        strbuf_grow(sb, len);
@@ -395,6 +402,12 @@ ssize_t strbuf_read_once(struct strbuf *sb, int fd, size_t hint)
        return cnt;
 }
 
+ssize_t strbuf_write(struct strbuf *sb, FILE *f)
+{
+       return sb->len ? fwrite(sb->buf, 1, sb->len, f) : 0;
+}
+
+
 #define STRBUF_MAXLINK (2*PATH_MAX)
 
 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)