#include "cache.h"
+int prefixcmp(const char *str, const char *prefix)
+{
+ for (; ; str++, prefix++)
+ if (!*prefix)
+ return 0;
+ else if (*str != *prefix)
+ return (unsigned char)*prefix - (unsigned char)*str;
+}
+
+/*
+ * Used as the default ->buf value, so that people can always assume
+ * buf is non NULL and ->buf is NUL terminated even for a freshly
+ * initialized strbuf.
+ */
+char strbuf_slopbuf[1];
+
void strbuf_init(struct strbuf *sb, size_t hint)
{
- memset(sb, 0, sizeof(*sb));
+ sb->alloc = sb->len = 0;
+ sb->buf = strbuf_slopbuf;
if (hint)
strbuf_grow(sb, hint);
}
void strbuf_release(struct strbuf *sb)
{
- free(sb->buf);
- memset(sb, 0, sizeof(*sb));
-}
-
-void strbuf_reset(struct strbuf *sb)
-{
- if (sb->len)
- strbuf_setlen(sb, 0);
- sb->eof = 0;
+ if (sb->alloc) {
+ free(sb->buf);
+ strbuf_init(sb, 0);
+ }
}
-char *strbuf_detach(struct strbuf *sb)
+char *strbuf_detach(struct strbuf *sb, size_t *sz)
{
- char *res = sb->buf;
+ char *res = sb->alloc ? sb->buf : NULL;
+ if (sz)
+ *sz = sb->len;
strbuf_init(sb, 0);
return res;
}
{
if (sb->len + extra + 1 <= sb->len)
die("you want to use way too much memory");
+ if (!sb->alloc)
+ sb->buf = NULL;
ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
}
sb->buf[sb->len] = '\0';
}
-void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
+int strbuf_cmp(struct strbuf *a, struct strbuf *b)
{
- strbuf_grow(sb, len);
- if (pos > sb->len)
- die("`pos' is too far after the end of the buffer");
- memmove(sb->buf + pos + len, sb->buf + pos, sb->len - pos);
- memcpy(sb->buf + pos, data, len);
- strbuf_setlen(sb, sb->len + len);
+ int cmp;
+ if (a->len < b->len) {
+ cmp = memcmp(a->buf, b->buf, a->len);
+ return cmp ? cmp : -1;
+ } else {
+ cmp = memcmp(a->buf, b->buf, b->len);
+ return cmp ? cmp : a->len != b->len;
+ }
}
void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
strbuf_setlen(sb, sb->len + dlen - len);
}
+void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
+{
+ strbuf_splice(sb, pos, 0, data, len);
+}
+
+void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
+{
+ strbuf_splice(sb, pos, len, NULL, 0);
+}
+
void strbuf_add(struct strbuf *sb, const void *data, size_t len)
{
strbuf_grow(sb, len);
strbuf_setlen(sb, sb->len + len);
}
+void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
+{
+ strbuf_grow(sb, len);
+ memcpy(sb->buf + sb->len, sb->buf + pos, len);
+ strbuf_setlen(sb, sb->len + len);
+}
+
void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
{
int len;
va_list ap;
+ if (!strbuf_avail(sb))
+ strbuf_grow(sb, 64);
va_start(ap, fmt);
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
va_end(ap);
- if (len < 0) {
- len = 0;
- }
+ if (len < 0)
+ die("your vsnprintf is broken");
if (len > strbuf_avail(sb)) {
strbuf_grow(sb, len);
va_start(ap, fmt);
strbuf_setlen(sb, sb->len + len);
}
+void strbuf_expand(struct strbuf *sb, const char *format,
+ const char **placeholders, expand_fn_t fn, void *context)
+{
+ for (;;) {
+ const char *percent, **p;
+
+ percent = strchrnul(format, '%');
+ strbuf_add(sb, format, percent - format);
+ if (!*percent)
+ break;
+ format = percent + 1;
+
+ for (p = placeholders; *p; p++) {
+ if (!prefixcmp(format, *p))
+ break;
+ }
+ if (*p) {
+ fn(sb, *p, context);
+ format += strlen(*p);
+ } else
+ strbuf_addch(sb, '%');
+ }
+}
+
size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
{
size_t res;
return sb->len - oldlen;
}
-void read_line(struct strbuf *sb, FILE *fp, int term)
+int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
{
int ch;
- if (feof(fp)) {
- strbuf_release(sb);
- sb->eof = 1;
- return;
- }
+
+ strbuf_grow(sb, 0);
+ if (feof(fp))
+ return EOF;
strbuf_reset(sb);
while ((ch = fgetc(fp)) != EOF) {
strbuf_grow(sb, 1);
sb->buf[sb->len++] = ch;
}
- if (ch == EOF && sb->len == 0) {
- strbuf_release(sb);
- sb->eof = 1;
- }
+ if (ch == EOF && sb->len == 0)
+ return EOF;
- strbuf_grow(sb, 1);
sb->buf[sb->len] = '\0';
+ return 0;
+}
+
+int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
+{
+ int fd, len;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return -1;
+ len = strbuf_read(sb, fd, hint);
+ close(fd);
+ if (len < 0)
+ return -1;
+
+ return len;
}