config: Give error message when not changing a multivar
[git/dscho.git] / quote.h
blob024e21d80ceaa37ec1f893acc907a62092560d21
1 #ifndef QUOTE_H
2 #define QUOTE_H
4 struct strbuf;
6 /* Help to copy the thing properly quoted for the shell safety.
7 * any single quote is replaced with '\'', any exclamation point
8 * is replaced with '\!', and the whole thing is enclosed in a
9 * single quote pair.
11 * For example, if you are passing the result to system() as an
12 * argument:
14 * sprintf(cmd, "foobar %s %s", sq_quote(arg0), sq_quote(arg1))
16 * would be appropriate. If the system() is going to call ssh to
17 * run the command on the other side:
19 * sprintf(cmd, "git-diff-tree %s %s", sq_quote(arg0), sq_quote(arg1));
20 * sprintf(rcmd, "ssh %s %s", sq_quote(host), sq_quote(cmd));
22 * Note that the above examples leak memory! Remember to free result from
23 * sq_quote() in a real application.
25 * sq_quote_buf() writes to an existing buffer of specified size; it
26 * will return the number of characters that would have been written
27 * excluding the final null regardless of the buffer size.
30 extern void sq_quote_print(FILE *stream, const char *src);
32 extern void sq_quote_buf(struct strbuf *, const char *src);
33 extern void sq_quote_argv(struct strbuf *, const char **argv, size_t maxlen);
35 /* This unwraps what sq_quote() produces in place, but returns
36 * NULL if the input does not look like what sq_quote would have
37 * produced.
39 extern char *sq_dequote(char *);
42 * Same as the above, but can be used to unwrap many arguments in the
43 * same string separated by space. "next" is changed to point to the
44 * next argument that should be passed as first parameter. When there
45 * is no more argument to be dequoted, "next" is updated to point to NULL.
47 extern int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc);
49 extern int unquote_c_style(struct strbuf *, const char *quoted, const char **endp);
50 extern size_t quote_c_style(const char *name, struct strbuf *, FILE *, int no_dq);
51 extern void quote_two_c_style(struct strbuf *, const char *, const char *, int);
53 extern void write_name_quoted(const char *name, FILE *, int terminator);
54 extern void write_name_quotedpfx(const char *pfx, size_t pfxlen,
55 const char *name, FILE *, int terminator);
56 extern void write_name_quoted_relative(const char *name, size_t len,
57 const char *prefix, size_t prefix_len,
58 FILE *fp, int terminator);
60 /* quote path as relative to the given prefix */
61 extern char *quote_path_relative(const char *in, int len,
62 struct strbuf *out, const char *prefix);
64 /* quoting as a string literal for other languages */
65 extern void perl_quote_print(FILE *stream, const char *src);
66 extern void python_quote_print(FILE *stream, const char *src);
67 extern void tcl_quote_print(FILE *stream, const char *src);
69 #endif