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diff --git a/strbuf.c b/strbuf.c
index 720737d856b694bc5239f0c18af372959c99e744..09c43ae59a7d4715c26f13d72ca37bc759d1c76d 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
#include "cache.h"
+#include "refs.h"
int prefixcmp(const char *str, const char *prefix)
{
return (unsigned char)*prefix - (unsigned char)*str;
}
+int suffixcmp(const char *str, const char *suffix)
+{
+ int len = strlen(str), suflen = strlen(suffix);
+ if (len < suflen)
+ return -1;
+ else
+ return strcmp(str + len - suflen, suffix);
+}
+
/*
* 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
{
sb->alloc = sb->len = 0;
sb->buf = strbuf_slopbuf;
- if (hint)
+ if (hint) {
strbuf_grow(sb, hint);
+ sb->buf[0] = '\0';
+ }
}
void strbuf_release(struct strbuf *sb)
void strbuf_grow(struct strbuf *sb, size_t extra)
{
- if (sb->len + extra + 1 <= sb->len)
+ if (unsigned_add_overflows(extra, 1) ||
+ unsigned_add_overflows(sb->len, extra + 1))
die("you want to use way too much memory");
if (!sb->alloc)
sb->buf = NULL;
sb->buf[sb->len] = '\0';
}
-void strbuf_tolower(struct strbuf *sb)
-{
- int i;
- for (i = 0; i < sb->len; i++)
- sb->buf[i] = tolower(sb->buf[i]);
-}
-
struct strbuf **strbuf_split(const struct strbuf *sb, int delim)
{
int alloc = 2, pos = 0;
int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
{
- 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;
- }
+ int len = a->len < b->len ? a->len: b->len;
+ int cmp = memcmp(a->buf, b->buf, len);
+ if (cmp)
+ return cmp;
+ return a->len < b->len ? -1: a->len != b->len;
}
void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
const void *data, size_t dlen)
{
- if (pos + len < pos)
+ if (unsigned_add_overflows(pos, len))
die("you want to use way too much memory");
if (pos > sb->len)
die("`pos' is too far after the end of the buffer");
void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
{
- int len;
va_list ap;
+ va_start(ap, fmt);
+ strbuf_vaddf(sb, fmt, ap);
+ va_end(ap);
+}
+
+void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
+{
+ int len;
+ va_list cp;
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);
+ va_copy(cp, ap);
+ len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
+ va_end(cp);
if (len < 0)
- die("your vsnprintf is broken");
+ die("BUG: your vsnprintf is broken (returned %d)", len);
if (len > strbuf_avail(sb)) {
strbuf_grow(sb, len);
- va_start(ap, fmt);
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
- va_end(ap);
- if (len > strbuf_avail(sb)) {
- die("this should not happen, your snprintf is broken");
- }
+ if (len > strbuf_avail(sb))
+ die("BUG: your vsnprintf is broken (insatiable)");
}
strbuf_setlen(sb, sb->len + len);
}
break;
format = percent + 1;
+ if (*format == '%') {
+ strbuf_addch(sb, '%');
+ format++;
+ continue;
+ }
+
consumed = fn(sb, format, context);
if (consumed)
format += consumed;
}
}
+size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
+ void *context)
+{
+ struct strbuf_expand_dict_entry *e = context;
+ size_t len;
+
+ for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
+ if (!strncmp(placeholder, e->placeholder, len)) {
+ if (e->value)
+ strbuf_addstr(sb, e->value);
+ return len;
+ }
+ }
+ return 0;
+}
+
+void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
+{
+ int i, len = src->len;
+
+ for (i = 0; i < len; i++) {
+ if (src->buf[i] == '%')
+ strbuf_addch(dst, '%');
+ strbuf_addch(dst, src->buf[i]);
+ }
+}
+
size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
{
size_t res;
+ size_t oldalloc = sb->alloc;
strbuf_grow(sb, size);
res = fread(sb->buf + sb->len, 1, size, f);
- if (res > 0) {
+ if (res > 0)
strbuf_setlen(sb, sb->len + res);
- }
+ else if (oldalloc == 0)
+ strbuf_release(sb);
return res;
}
ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
{
size_t oldlen = sb->len;
+ size_t oldalloc = sb->alloc;
strbuf_grow(sb, hint ? hint : 8192);
for (;;) {
cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
if (cnt < 0) {
- strbuf_setlen(sb, oldlen);
+ if (oldalloc == 0)
+ strbuf_release(sb);
+ else
+ strbuf_setlen(sb, oldlen);
return -1;
}
if (!cnt)
return sb->len - oldlen;
}
-int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
+#define STRBUF_MAXLINK (2*PATH_MAX)
+
+int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
+{
+ size_t oldalloc = sb->alloc;
+
+ if (hint < 32)
+ hint = 32;
+
+ while (hint < STRBUF_MAXLINK) {
+ int len;
+
+ strbuf_grow(sb, hint);
+ len = readlink(path, sb->buf, hint);
+ if (len < 0) {
+ if (errno != ERANGE)
+ break;
+ } else if (len < hint) {
+ strbuf_setlen(sb, len);
+ return 0;
+ }
+
+ /* .. the buffer was too small - try again */
+ hint *= 2;
+ }
+ if (oldalloc == 0)
+ strbuf_release(sb);
+ return -1;
+}
+
+int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
{
int ch;
strbuf_reset(sb);
while ((ch = fgetc(fp)) != EOF) {
- if (ch == term)
- break;
strbuf_grow(sb, 1);
sb->buf[sb->len++] = ch;
+ if (ch == term)
+ break;
}
if (ch == EOF && sb->len == 0)
return EOF;
return 0;
}
+int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
+{
+ if (strbuf_getwholeline(sb, fp, term))
+ return EOF;
+ if (sb->buf[sb->len-1] == term)
+ strbuf_setlen(sb, sb->len-1);
+ return 0;
+}
+
int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
{
int fd, len;