strbuf.c

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