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5558e55c06
Love it or hate it, some people actually still program in Tcl. Some of those programs are meant for interfacing with Git. Programs such as gitk and git-gui. It may be useful to have Tcl-safe output available from for-each-ref, just like shell, Perl and Python already enjoy. Thanks to Sergey Vlasov for pointing out the horrible flaws in the first and second version of this patch, and steering me in the right direction for Tcl value quoting. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
#ifndef QUOTE_H
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#define QUOTE_H
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#include <stddef.h>
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#include <stdio.h>
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/* Help to copy the thing properly quoted for the shell safety.
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* any single quote is replaced with '\'', any exclamation point
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* is replaced with '\!', and the whole thing is enclosed in a
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* single quote pair.
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*
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* For example, if you are passing the result to system() as an
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* argument:
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*
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* sprintf(cmd, "foobar %s %s", sq_quote(arg0), sq_quote(arg1))
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*
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* would be appropriate. If the system() is going to call ssh to
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* run the command on the other side:
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*
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* sprintf(cmd, "git-diff-tree %s %s", sq_quote(arg0), sq_quote(arg1));
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* sprintf(rcmd, "ssh %s %s", sq_quote(host), sq_quote(cmd));
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*
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* Note that the above examples leak memory! Remember to free result from
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* sq_quote() in a real application.
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*
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* sq_quote_buf() writes to an existing buffer of specified size; it
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* will return the number of characters that would have been written
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* excluding the final null regardless of the buffer size.
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*/
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extern char *sq_quote(const char *src);
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extern void sq_quote_print(FILE *stream, const char *src);
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extern size_t sq_quote_buf(char *dst, size_t n, const char *src);
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extern char *sq_quote_argv(const char** argv, int count);
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/*
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* Append a string to a string buffer, with or without shell quoting.
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* Return true if the buffer overflowed.
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*/
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extern int add_to_string(char **ptrp, int *sizep, const char *str, int quote);
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/* This unwraps what sq_quote() produces in place, but returns
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* NULL if the input does not look like what sq_quote would have
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* produced.
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*/
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extern char *sq_dequote(char *);
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extern int quote_c_style(const char *name, char *outbuf, FILE *outfp,
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int nodq);
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extern char *unquote_c_style(const char *quoted, const char **endp);
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extern void write_name_quoted(const char *prefix, int prefix_len,
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const char *name, int quote, FILE *out);
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/* quoting as a string literal for other languages */
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extern void perl_quote_print(FILE *stream, const char *src);
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extern void python_quote_print(FILE *stream, const char *src);
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extern void tcl_quote_print(FILE *stream, const char *src);
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#endif
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