mirror of
https://github.com/git/git.git
synced 2024-11-13 20:53:02 +01:00
eacd6dc594
Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <gitster@pobox.com>
310 lines
6.1 KiB
C
310 lines
6.1 KiB
C
#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)
|
|
{
|
|
sb->alloc = sb->len = 0;
|
|
sb->buf = strbuf_slopbuf;
|
|
if (hint)
|
|
strbuf_grow(sb, hint);
|
|
}
|
|
|
|
void strbuf_release(struct strbuf *sb)
|
|
{
|
|
if (sb->alloc) {
|
|
free(sb->buf);
|
|
strbuf_init(sb, 0);
|
|
}
|
|
}
|
|
|
|
char *strbuf_detach(struct strbuf *sb, size_t *sz)
|
|
{
|
|
char *res = sb->alloc ? sb->buf : NULL;
|
|
if (sz)
|
|
*sz = sb->len;
|
|
strbuf_init(sb, 0);
|
|
return res;
|
|
}
|
|
|
|
void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
|
|
{
|
|
strbuf_release(sb);
|
|
sb->buf = buf;
|
|
sb->len = len;
|
|
sb->alloc = alloc;
|
|
strbuf_grow(sb, 0);
|
|
sb->buf[sb->len] = '\0';
|
|
}
|
|
|
|
void strbuf_grow(struct strbuf *sb, size_t extra)
|
|
{
|
|
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);
|
|
}
|
|
|
|
void strbuf_trim(struct strbuf *sb)
|
|
{
|
|
char *b = sb->buf;
|
|
while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
|
|
sb->len--;
|
|
while (sb->len > 0 && isspace(*b)) {
|
|
b++;
|
|
sb->len--;
|
|
}
|
|
memmove(sb->buf, b, sb->len);
|
|
sb->buf[sb->len] = '\0';
|
|
}
|
|
void strbuf_rtrim(struct strbuf *sb)
|
|
{
|
|
while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
|
|
sb->len--;
|
|
sb->buf[sb->len] = '\0';
|
|
}
|
|
|
|
void strbuf_ltrim(struct strbuf *sb)
|
|
{
|
|
char *b = sb->buf;
|
|
while (sb->len > 0 && isspace(*b)) {
|
|
b++;
|
|
sb->len--;
|
|
}
|
|
memmove(sb->buf, b, sb->len);
|
|
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;
|
|
char *n, *p;
|
|
struct strbuf **ret;
|
|
struct strbuf *t;
|
|
|
|
ret = xcalloc(alloc, sizeof(struct strbuf *));
|
|
p = n = sb->buf;
|
|
while (n < sb->buf + sb->len) {
|
|
int len;
|
|
n = memchr(n, delim, sb->len - (n - sb->buf));
|
|
if (pos + 1 >= alloc) {
|
|
alloc = alloc * 2;
|
|
ret = xrealloc(ret, sizeof(struct strbuf *) * alloc);
|
|
}
|
|
if (!n)
|
|
n = sb->buf + sb->len - 1;
|
|
len = n - p + 1;
|
|
t = xmalloc(sizeof(struct strbuf));
|
|
strbuf_init(t, len);
|
|
strbuf_add(t, p, len);
|
|
ret[pos] = t;
|
|
ret[++pos] = NULL;
|
|
p = ++n;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void strbuf_list_free(struct strbuf **sbs)
|
|
{
|
|
struct strbuf **s = sbs;
|
|
|
|
while (*s) {
|
|
strbuf_release(*s);
|
|
free(*s++);
|
|
}
|
|
free(sbs);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
|
|
const void *data, size_t dlen)
|
|
{
|
|
if (pos + len < pos)
|
|
die("you want to use way too much memory");
|
|
if (pos > sb->len)
|
|
die("`pos' is too far after the end of the buffer");
|
|
if (pos + len > sb->len)
|
|
die("`pos + len' is too far after the end of the buffer");
|
|
|
|
if (dlen >= len)
|
|
strbuf_grow(sb, dlen - len);
|
|
memmove(sb->buf + pos + dlen,
|
|
sb->buf + pos + len,
|
|
sb->len - pos - len);
|
|
memcpy(sb->buf + pos, data, dlen);
|
|
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);
|
|
memcpy(sb->buf + sb->len, data, 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)
|
|
die("your vsnprintf is broken");
|
|
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");
|
|
}
|
|
}
|
|
strbuf_setlen(sb, sb->len + len);
|
|
}
|
|
|
|
void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
|
|
void *context)
|
|
{
|
|
for (;;) {
|
|
const char *percent;
|
|
size_t consumed;
|
|
|
|
percent = strchrnul(format, '%');
|
|
strbuf_add(sb, format, percent - format);
|
|
if (!*percent)
|
|
break;
|
|
format = percent + 1;
|
|
|
|
consumed = fn(sb, format, context);
|
|
if (consumed)
|
|
format += consumed;
|
|
else
|
|
strbuf_addch(sb, '%');
|
|
}
|
|
}
|
|
|
|
size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
|
|
{
|
|
size_t res;
|
|
|
|
strbuf_grow(sb, size);
|
|
res = fread(sb->buf + sb->len, 1, size, f);
|
|
if (res > 0) {
|
|
strbuf_setlen(sb, sb->len + res);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
|
|
{
|
|
size_t oldlen = sb->len;
|
|
|
|
strbuf_grow(sb, hint ? hint : 8192);
|
|
for (;;) {
|
|
ssize_t cnt;
|
|
|
|
cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
|
|
if (cnt < 0) {
|
|
strbuf_setlen(sb, oldlen);
|
|
return -1;
|
|
}
|
|
if (!cnt)
|
|
break;
|
|
sb->len += cnt;
|
|
strbuf_grow(sb, 8192);
|
|
}
|
|
|
|
sb->buf[sb->len] = '\0';
|
|
return sb->len - oldlen;
|
|
}
|
|
|
|
int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
|
|
{
|
|
int ch;
|
|
|
|
strbuf_grow(sb, 0);
|
|
if (feof(fp))
|
|
return EOF;
|
|
|
|
strbuf_reset(sb);
|
|
while ((ch = fgetc(fp)) != EOF) {
|
|
if (ch == term)
|
|
break;
|
|
strbuf_grow(sb, 1);
|
|
sb->buf[sb->len++] = ch;
|
|
}
|
|
if (ch == EOF && sb->len == 0)
|
|
return EOF;
|
|
|
|
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;
|
|
}
|