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quote: implement "sq_dequote_many" to unwrap many args in one string 

The sq_dequote() function does not allow parsing a string with more than
one single-quoted parameter easily; use its code to implement a new API
sq_dequote_step() to allow the caller iterate through such a string to
parse them one-by-one.  The original sq_dequote() becomes a thin wrapper
around it.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Christian Couder 2009-03-29 11:44:44 +02:00 committed by Junio C Hamano
parent 89fbda2425
commit ebbc088e13
2 changed files with 24 additions and 2 deletions
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18
quote.c
View File

@ -72,7 +72,7 @@ void sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen)
}
}
char *sq_dequote(char *arg)
char *sq_dequote_step(char *arg, char **next)
{
char *dst = arg;
char *src = arg;
@ -92,6 +92,8 @@ char *sq_dequote(char *arg)
switch (*++src) {
case '\0':
*dst = 0;
if (next)
*next = NULL;
return arg;
case '\\':
c = *++src;
@ -101,11 +103,23 @@ char *sq_dequote(char *arg)
}
/* Fallthrough */
default:
return NULL;
if (!next || !isspace(*src))
return NULL;
do {
c = *++src;
} while (isspace(c));
*dst = 0;
*next = src;
return arg;
}
}
}
char *sq_dequote(char *arg)
{
return sq_dequote_step(arg, NULL);
}
/* 1 means: quote as octal
* 0 means: quote as octal if (quote_path_fully)
* -1 means: never quote

8
quote.h
View File

@ -39,6 +39,14 @@ extern void sq_quote_argv(struct strbuf *, const char **argv, size_t maxlen);
*/
extern char *sq_dequote(char *);
/*
* Same as the above, but can be used to unwrap many arguments in the
* same string separated by space. "next" is changed to point to the
* next argument that should be passed as first parameter. When there
* is no more argument to be dequoted, "next" is updated to point to NULL.
*/
extern char *sq_dequote_step(char *arg, char **next);
extern int unquote_c_style(struct strbuf *, const char *quoted, const char **endp);
extern size_t quote_c_style(const char *name, struct strbuf *, FILE *, int no_dq);
extern void quote_two_c_style(struct strbuf *, const char *, const char *, int);