git/quote.h
Junio C Hamano 4f6fbcdcf9 Functions to quote and unquote pathnames in C-style.
Following the list discussion, define two functions, quote_c_style and
unquote_c_style, to help adopting the proposed way for quoting funny
pathname letters for GNU patch.  The rule is described in:

    http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2

Currently we do not support the leading '!', but we probably should
barf upon seeing it.  Rule B4. is interpreted to require always 3
octal digits in \XYZ notation.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-10-17 17:41:54 -07:00

41 lines
1.3 KiB
C

#ifndef QUOTE_H
#define QUOTE_H
#include <stddef.h>
#include <stdio.h>
/* Help to copy the thing properly quoted for the shell safety.
* any single quote is replaced with '\'', any exclamation point
* is replaced with '\!', and the whole thing is enclosed in a
* single quote pair.
*
* For example, if you are passing the result to system() as an
* argument:
*
* sprintf(cmd, "foobar %s %s", sq_quote(arg0), sq_quote(arg1))
*
* would be appropriate. If the system() is going to call ssh to
* run the command on the other side:
*
* sprintf(cmd, "git-diff-tree %s %s", sq_quote(arg0), sq_quote(arg1));
* sprintf(rcmd, "ssh %s %s", sq_quote(host), sq_quote(cmd));
*
* Note that the above examples leak memory! Remember to free result from
* sq_quote() in a real application.
*
* sq_quote_buf() writes to an existing buffer of specified size; it
* will return the number of characters that would have been written
* excluding the final null regardless of the buffer size.
*/
extern char *sq_quote(const char *src);
extern size_t sq_quote_buf(char *dst, size_t n, const char *src);
extern int quote_c_style(const char *name, char *outbuf, FILE *outfp,
int nodq);
extern char *unquote_c_style(const char *quoted, const char **endp);
extern void write_name_quoted(const char *prefix, const char *name,
int quote, FILE *out);
#endif