strbuf.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include "strbuf.h"
   4 #include "cache.h"
   5
   6 void strbuf_init(struct strbuf *sb) {
   7         sb->buf = NULL;
   8         sb->eof = sb->alloc = sb->len = 0;
   9 }
  10
  11 static void strbuf_begin(struct strbuf *sb) {
  12         free(sb->buf);
  13         strbuf_init(sb);
  14 }
  15
  16 static void inline strbuf_add(struct strbuf *sb, int ch) {
  17         if (sb->alloc <= sb->len) {
  18                 sb->alloc = sb->alloc * 3 / 2 + 16;
  19                 sb->buf = xrealloc(sb->buf, sb->alloc);
  20         }
  21         sb->buf[sb->len++] = ch;
  22 }
  23
  24 static void strbuf_end(struct strbuf *sb) {
  25         strbuf_add(sb, 0);
  26 }
  27
  28 void read_line(struct strbuf *sb, FILE *fp, int term) {
  29         int ch;
  30         strbuf_begin(sb);
  31         if (feof(fp)) {
  32                 sb->eof = 1;
  33                 return;
  34         }
  35         while ((ch = fgetc(fp)) != EOF) {
  36                 if (ch == term)
  37                         break;
  38                 strbuf_add(sb, ch);
  39         }
  40         if (ch == EOF && sb->len == 0)
  41                 sb->eof = 1;
  42         strbuf_end(sb);
  43 }
  44