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sq_quote_argv and add_to_string rework with strbuf's.

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* sq_quote_buf is made public, and works on a strbuf.
* sq_quote_argv also works on a strbuf.
* make sq_quote_argv take a "maxlen" argument to check the buffer won't grow
  too big.

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Pierre Habouzit
2007-09-20 00:42:13 +02:00
committed by Junio C Hamano
parent 663af3422a
commit 7a33bcbe80
6 changed files with 86 additions and 137 deletions
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92
quote.c
View File

@ -12,37 +12,31 @@
* a'b ==> a'\''b ==> 'a'\''b'
* a!b ==> a'\!'b ==> 'a'\!'b'
*/
#undef EMIT
#define EMIT(x) do { if (++len < n) *bp++ = (x); } while(0)
static inline int need_bs_quote(char c)
{
return (c == '\'' || c == '!');
}
static size_t sq_quote_buf(char *dst, size_t n, const char *src)
void sq_quote_buf(struct strbuf *dst, const char *src)
{
char c;
char *bp = dst;
size_t len = 0;
char *to_free = NULL;
EMIT('\'');
while ((c = *src++)) {
if (need_bs_quote(c)) {
EMIT('\'');
EMIT('\\');
EMIT(c);
EMIT('\'');
} else {
EMIT(c);
if (dst->buf == src)
to_free = strbuf_detach(dst);
strbuf_addch(dst, '\'');
while (*src) {
size_t len = strcspn(src, "'\\");
strbuf_add(dst, src, len);
src += len;
while (need_bs_quote(*src)) {
strbuf_addstr(dst, "'\\");
strbuf_addch(dst, *src++);
strbuf_addch(dst, '\'');
}
}
EMIT('\'');
if ( n )
*bp = 0;
return len;
strbuf_addch(dst, '\'');
free(to_free);
}
void sq_quote_print(FILE *stream, const char *src)
@ -62,11 +56,10 @@ void sq_quote_print(FILE *stream, const char *src)
fputc('\'', stream);
}
char *sq_quote_argv(const char** argv, int count)
void sq_quote_argv(struct strbuf *dst, const char** argv, int count,
size_t maxlen)
{
char *buf, *to;
int i;
size_t len = 0;
/* Count argv if needed. */
if (count < 0) {
@ -74,53 +67,14 @@ char *sq_quote_argv(const char** argv, int count)
; /* just counting */
}
/* Special case: no argv. */
if (!count)
return xcalloc(1,1);
/* Get destination buffer length. */
for (i = 0; i < count; i++)
len += sq_quote_buf(NULL, 0, argv[i]) + 1;
/* Alloc destination buffer. */
to = buf = xmalloc(len + 1);
/* Copy into destination buffer. */
strbuf_grow(dst, 32 * count);
for (i = 0; i < count; ++i) {
*to++ = ' ';
to += sq_quote_buf(to, len, argv[i]);
strbuf_addch(dst, ' ');
sq_quote_buf(dst, argv[i]);
if (maxlen && dst->len > maxlen)
die("Too many or long arguments");
}
return buf;
}
/*
* Append a string to a string buffer, with or without shell quoting.
* Return true if the buffer overflowed.
*/
int add_to_string(char **ptrp, int *sizep, const char *str, int quote)
{
char *p = *ptrp;
int size = *sizep;
int oc;
int err = 0;
if (quote)
oc = sq_quote_buf(p, size, str);
else {
oc = strlen(str);
memcpy(p, str, (size <= oc) ? size - 1 : oc);
}
if (size <= oc) {
err = 1;
oc = size - 1;
}
*ptrp += oc;
**ptrp = '\0';
*sizep -= oc;
return err;
}
char *sq_dequote(char *arg)