[PATCH] Introduce diff-tree-helper.
[git/git.git] / strbuf.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include "strbuf.h"
4
5 void strbuf_init(struct strbuf *sb) {
6 sb->buf = 0;
7 sb->eof = sb->alloc = sb->len = 0;
8 }
9
10 static void strbuf_begin(struct strbuf *sb) {
11 free(sb->buf);
12 strbuf_init(sb);
13 }
14
15 static void inline strbuf_add(struct strbuf *sb, int ch) {
16 if (sb->alloc <= sb->len) {
17 sb->alloc = sb->alloc * 3 / 2 + 16;
18 sb->buf = realloc(sb->buf, sb->alloc);
19 }
20 sb->buf[sb->len++] = ch;
21 }
22
23 static void strbuf_end(struct strbuf *sb) {
24 strbuf_add(sb, 0);
25 }
26
27 void read_line(struct strbuf *sb, FILE *fp, int term) {
28 int ch;
29 strbuf_begin(sb);
30 if (feof(fp)) {
31 sb->eof = 1;
32 return;
33 }
34 while ((ch = fgetc(fp)) != EOF) {
35 if (ch == term)
36 break;
37 strbuf_add(sb, ch);
38 }
39 if (sb->len == 0)
40 sb->eof = 1;
41 strbuf_end(sb);
42 }
43