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-rw-r--r--strbuf.c282
1 files changed, 254 insertions, 28 deletions
diff --git a/strbuf.c b/strbuf.c
index 4aed75265e..5135d5950d 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -1,4 +1,5 @@
#include "cache.h"
+#include "refs.h"
int prefixcmp(const char *str, const char *prefix)
{
@@ -9,6 +10,15 @@ 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
@@ -53,13 +63,29 @@ void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
void strbuf_grow(struct strbuf *sb, size_t extra)
{
- if (sb->len + extra + 1 <= sb->len)
+ int new_buf = !sb->alloc;
+ 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)
+ if (new_buf)
sb->buf = NULL;
ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
+ if (new_buf)
+ sb->buf[0] = '\0';
}
+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]))
@@ -67,22 +93,73 @@ void strbuf_rtrim(struct strbuf *sb)
sb->buf[sb->len] = '\0';
}
-int strbuf_cmp(struct strbuf *a, struct strbuf *b)
+void strbuf_ltrim(struct strbuf *sb)
{
- 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;
+ char *b = sb->buf;
+ while (sb->len > 0 && isspace(*b)) {
+ b++;
+ sb->len--;
}
+ memmove(sb->buf, b, sb->len);
+ sb->buf[sb->len] = '\0';
+}
+
+struct strbuf **strbuf_split_buf(const char *str, size_t slen, int delim, int max)
+{
+ int alloc = 2, pos = 0;
+ const char *n, *p;
+ struct strbuf **ret;
+ struct strbuf *t;
+
+ ret = xcalloc(alloc, sizeof(struct strbuf *));
+ p = n = str;
+ while (n < str + slen) {
+ int len;
+ if (max <= 0 || pos + 1 < max)
+ n = memchr(n, delim, slen - (n - str));
+ else
+ n = NULL;
+ if (pos + 1 >= alloc) {
+ alloc = alloc * 2;
+ ret = xrealloc(ret, sizeof(struct strbuf *) * alloc);
+ }
+ if (!n)
+ n = str + slen - 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 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");
@@ -124,24 +201,29 @@ void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
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);
}
@@ -159,6 +241,12 @@ void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
break;
format = percent + 1;
+ if (*format == '%') {
+ strbuf_addch(sb, '%');
+ format++;
+ continue;
+ }
+
consumed = fn(sb, format, context);
if (consumed)
format += consumed;
@@ -167,21 +255,51 @@ void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
}
}
+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 (;;) {
@@ -189,7 +307,10 @@ ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
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)
@@ -202,20 +323,49 @@ ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
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_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 == term)
+ break;
}
if (ch == EOF && sb->len == 0)
return EOF;
@@ -224,6 +374,31 @@ int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
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_getwholeline_fd(struct strbuf *sb, int fd, int term)
+{
+ strbuf_reset(sb);
+
+ while (1) {
+ char ch;
+ ssize_t len = xread(fd, &ch, 1);
+ if (len <= 0)
+ return EOF;
+ strbuf_addch(sb, ch);
+ if (ch == term)
+ break;
+ }
+ return 0;
+}
+
int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
{
int fd, len;
@@ -238,3 +413,54 @@ int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
return len;
}
+
+void strbuf_add_lines(struct strbuf *out, const char *prefix,
+ const char *buf, size_t size)
+{
+ while (size) {
+ const char *next = memchr(buf, '\n', size);
+ next = next ? (next + 1) : (buf + size);
+ strbuf_addstr(out, prefix);
+ strbuf_add(out, buf, next - buf);
+ size -= next - buf;
+ buf = next;
+ }
+ strbuf_complete_line(out);
+}
+
+static int is_rfc3986_reserved(char ch)
+{
+ switch (ch) {
+ case '!': case '*': case '\'': case '(': case ')': case ';':
+ case ':': case '@': case '&': case '=': case '+': case '$':
+ case ',': case '/': case '?': case '#': case '[': case ']':
+ return 1;
+ }
+ return 0;
+}
+
+static int is_rfc3986_unreserved(char ch)
+{
+ return isalnum(ch) ||
+ ch == '-' || ch == '_' || ch == '.' || ch == '~';
+}
+
+void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len,
+ int reserved)
+{
+ strbuf_grow(sb, len);
+ while (len--) {
+ char ch = *s++;
+ if (is_rfc3986_unreserved(ch) ||
+ (!reserved && is_rfc3986_reserved(ch)))
+ strbuf_addch(sb, ch);
+ else
+ strbuf_addf(sb, "%%%02x", ch);
+ }
+}
+
+void strbuf_addstr_urlencode(struct strbuf *sb, const char *s,
+ int reserved)
+{
+ strbuf_add_urlencode(sb, s, strlen(s), reserved);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-17 18:38:31 +0000