Squashed 'third_party/git/' content from commit cb71568594

git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7

quote.h

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+#ifndef QUOTE_H
+#define QUOTE_H
+
+struct strbuf;
+
+/* 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.
+ *
+ * sq_quotef() quotes the entire formatted string as a single result.
+ */
+
+void sq_quote_buf(struct strbuf *, const char *src);
+void sq_quote_argv(struct strbuf *, const char **argv);
+void sq_quotef(struct strbuf *, const char *fmt, ...);
+
+/*
+ * These match their non-pretty variants, except that they avoid
+ * quoting when there are no exotic characters. These should only be used for
+ * human-readable output, as sq_dequote() is not smart enough to dequote it.
+ */
+void sq_quote_buf_pretty(struct strbuf *, const char *src);
+void sq_quote_argv_pretty(struct strbuf *, const char **argv);
+
+/* This unwraps what sq_quote() produces in place, but returns
+ * NULL if the input does not look like what sq_quote would have
+ * produced.
+ */
+char *sq_dequote(char *);
+
+/*
+ * Same as the above, but can be used to unwrap many arguments in the
+ * same string separated by space. Like sq_quote, it works in place,
+ * modifying arg and appending pointers into it to argv.
+ */
+int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc);
+
+/*
+ * Same as above, but store the unquoted strings in an argv_array. We will
+ * still modify arg in place, but unlike sq_dequote_to_argv, the argv_array
+ * will duplicate and take ownership of the strings.
+ */
+struct argv_array;
+int sq_dequote_to_argv_array(char *arg, struct argv_array *);
+
+int unquote_c_style(struct strbuf *, const char *quoted, const char **endp);
+size_t quote_c_style(const char *name, struct strbuf *, FILE *, int no_dq);
+void quote_two_c_style(struct strbuf *, const char *, const char *, int);
+
+void write_name_quoted(const char *name, FILE *, int terminator);
+void write_name_quoted_relative(const char *name, const char *prefix,
+				FILE *fp, int terminator);
+
+/* quote path as relative to the given prefix */
+char *quote_path_relative(const char *in, const char *prefix,
+			  struct strbuf *out);
+
+/* quoting as a string literal for other languages */
+void perl_quote_buf(struct strbuf *sb, const char *src);
+void python_quote_buf(struct strbuf *sb, const char *src);
+void tcl_quote_buf(struct strbuf *sb, const char *src);
+void basic_regex_quote_buf(struct strbuf *sb, const char *src);
+
+#endif