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/* aewm - a minimalist X11 window mananager. vim:noet:sw=4:ts=4
* Copyright 1998-2001 Decklin Foster <decklin@red-bean.com>
* This program is free software; see LICENSE for details. */
#include "parser.h"
#include <string.h>
#include <ctype.h>
/* Our crappy parser. A token is either a whitespace-delimited word,
* or a bunch or words in double quotes. Inside "", \" may be used.
* src points to somewhere in a buffer -- the caller must save the
* location of this buffer, because we update src to point past all
* the tokens found so far. If we find a token, we write it into dest
* (caller is responsible for allocating storage) and return 1.
* Otherwise return 0. */
int get_token(char **src, char *dest)
{
char *tok_start, *tok_end, *p;
int quoted, nchars = 0;
/* skip initial spaces */
while (**src && isspace(**src)) (*src)++;
if (*src[0] == '"') {
quoted = 1;
tok_start = *src+1;
tok_end = strchr(tok_start, '"');
if (!tok_end) return 0; /* unterminated quote */
while (*(tok_end-1) == '\\')
tok_end = strchr(tok_end+1, '"');
} else {
quoted = 0;
tok_start = *src;
tok_end = strpbrk(*src, " \t\n");
}
p = tok_start;
while (tok_end ? p < tok_end : *p) {
if (quoted && *p == '\\' && *(p+1) == '"') {
p++;
} else {
nchars++;
*dest++ = *p++;
}
}
*dest = '\0';
*src = ++tok_end;
return nchars || quoted;
}
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