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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>
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1 parent 89fbda2 commit ebbc088e13e1bf0dbf8eb08b00519602c176f864 @chriscool chriscool committed with gitster Mar 29, 2009
Showing with 24 additions and 2 deletions.
  1. +16 −2 quote.c
  2. +8 −0 quote.h
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18 quote.c
@@ -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
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@@ -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);

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