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-rw-r--r--strbuf.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/strbuf.c b/strbuf.c
new file mode 100644
index 0000000000..dac945c7c8
--- /dev/null
+++ b/strbuf.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "strbuf.h"
+
+void strbuf_init(struct strbuf *sb) {
+ sb->buf = 0;
+ sb->eof = sb->alloc = sb->len = 0;
+}
+
+static void strbuf_begin(struct strbuf *sb) {
+ free(sb->buf);
+ strbuf_init(sb);
+}
+
+static void inline strbuf_add(struct strbuf *sb, int ch) {
+ if (sb->alloc <= sb->len) {
+ sb->alloc = sb->alloc * 3 / 2 + 16;
+ sb->buf = realloc(sb->buf, sb->alloc);
+ }
+ sb->buf[sb->len++] = ch;
+}
+
+static void strbuf_end(struct strbuf *sb) {
+ strbuf_add(sb, 0);
+}
+
+void read_line(struct strbuf *sb, FILE *fp, int term) {
+ int ch;
+ strbuf_begin(sb);
+ if (feof(fp)) {
+ sb->eof = 1;
+ return;
+ }
+ while ((ch = fgetc(fp)) != EOF) {
+ if (ch == term)
+ break;
+ strbuf_add(sb, ch);
+ }
+ if (sb->len == 0)
+ sb->eof = 1;
+ strbuf_end(sb);
+}
+