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/* This file is part of GNU Dico
Copyright (C) 2008, 2010 Sergey Poznyakoff
GNU Dico is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Dico is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Dico. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <xdico.h>
#include <xalloc.h>
#define obstack_chunk_alloc malloc
#define obstack_chunk_free free
#include <obstack.h>
struct xdico_input {
struct obstack stk;
char *rootptr;
int argc;
char **argv;
};
#define ISWS(c) ((c) == ' ' || (c) == '\t')
#define ISQUOTE(c) ((c) == '"' || (c) == '\'')
static char quote_transtab[] = "\\\\\"\"a\ab\bf\fn\nr\rt\t";
int
xdico_unquote_char(int c)
{
char *p;
for (p = quote_transtab; *p; p += 2) {
if (*p == c)
return p[1];
}
return 0;
}
int
xdico_quote_char(int c)
{
char *p;
for (p = quote_transtab; *p; p += 2) {
if (p[1] == c)
return p[0];
}
return 0;
}
xdico_input_t
xdico_tokenize_begin()
{
return xzalloc(sizeof(struct xdico_input));
}
void
xdico_tokenize_end(xdico_input_t *pin)
{
xdico_input_t in = *pin;
obstack_free(&in->stk, NULL);
free(in);
*pin = NULL;
}
int
xdico_tokenize_input(xdico_input_t in, char *str, int *pargc, char ***pargv)
{
struct utf8_iterator itr;
int i, argc = 0;
if (!in->rootptr)
obstack_init(&in->stk);
else
obstack_free(&in->stk, in->rootptr);
utf8_iter_first(&itr, str);
while (1) {
int quote;
for (; !utf8_iter_end_p(&itr)
&& utf8_iter_isascii(itr) && ISWS(*itr.curptr);
utf8_iter_next(&itr))
;
if (utf8_iter_end_p(&itr))
break;
if (utf8_iter_isascii(itr) && ISQUOTE(*itr.curptr)) {
quote = *itr.curptr;
utf8_iter_next(&itr);
} else
quote = 0;
for (; !utf8_iter_end_p(&itr)
&& !(utf8_iter_isascii(itr) && (quote ? 0 : ISWS(*itr.curptr)));
utf8_iter_next(&itr)) {
if (utf8_iter_isascii(itr)) {
if (*itr.curptr == quote) {
utf8_iter_next(&itr);
break;
} else if (*itr.curptr == '\\') {
utf8_iter_next(&itr);
if (utf8_iter_isascii(itr)) {
obstack_1grow(&in->stk, xdico_quote_char(*itr.curptr));
} else {
obstack_1grow(&in->stk, '\\');
obstack_grow(&in->stk, itr.curptr, itr.curwidth);
}
continue;
}
}
obstack_grow(&in->stk, itr.curptr, itr.curwidth);
}
obstack_1grow(&in->stk, 0);
argc++;
}
in->rootptr = obstack_finish(&in->stk);
in->argc = argc;
in->argv = obstack_alloc(&in->stk, (argc + 1) * sizeof(in->argv[0]));
for (i = 0; i < argc; i++) {
in->argv[i] = in->rootptr;
in->rootptr += strlen(in->rootptr) + 1;
}
in->argv[i] = NULL;
*pargc = in->argc;
*pargv = in->argv;
return argc;
}
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