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/* This file is part of GNU Dico
Copyright (C) 2008-2024 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/>. */
#include <config.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <dico.h>
#define ISWS(c) ((c) == ' ' || (c) == '\t')
#define ISQUOTE(c) ((c) == '"' || (c) == '\'')
static char quote_transtab[] = "\\\\\"\"a\ab\bf\fn\nr\rt\t";
int
dico_unquote_char(int c)
{
char *p;
for (p = quote_transtab; *p; p += 2) {
if (*p == c)
return p[1];
}
return 0;
}
int
dico_quote_char(int c)
{
char *p;
for (p = quote_transtab; *p; p += 2) {
if (p[1] == c)
return p[0];
}
return 0;
}
void
dico_tokenize_begin(struct dico_tokbuf *tb)
{
memset(tb, 0, sizeof(*tb));
}
void
dico_tokenize_end(struct dico_tokbuf *tb)
{
free (tb->tb_base);
free (tb->tb_tokv);
}
void
dico_tokenize_clear(struct dico_tokbuf *tb)
{
tb->tb_level = 0;
tb->tb_tokc = 0;
}
static int
_dico_tkn_grow(struct dico_tokbuf *tb, char *str, size_t len)
{
if (tb->tb_level + len > tb->tb_size) {
size_t newsize = ((tb->tb_level + len + TKNBLOCKSIZ - 1) /
TKNBLOCKSIZ) * TKNBLOCKSIZ;
char *newbase = realloc(tb->tb_base, newsize);
if (!newbase)
return ENOMEM;
tb->tb_base = newbase;
tb->tb_size = newsize;
}
memcpy(tb->tb_base + tb->tb_level, str, len);
tb->tb_level += len;
return 0;
}
static int
_dico_tkn_1grow(struct dico_tokbuf *tb, int ch)
{
char c = ch;
return _dico_tkn_grow(tb, &c, 1);
}
int
dico_tokenize_string(struct dico_tokbuf *tb, char *str)
{
struct utf8_iterator itr;
int i, argc = 0;
int rc;
size_t start_level;
char *p;
utf8_iter_first(&itr, str);
start_level = tb->tb_level;
for (rc = 0; rc == 0;) {
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)) {
rc = _dico_tkn_1grow(tb, dico_quote_char(*itr.curptr));
} else {
rc = _dico_tkn_1grow(tb, '\\');
if (rc == 0)
rc = _dico_tkn_grow(tb, itr.curptr, itr.curwidth);
}
continue;
}
}
rc = _dico_tkn_grow(tb, itr.curptr, itr.curwidth);
}
if (rc == 0)
rc = _dico_tkn_1grow(tb, 0);
argc++;
}
if (rc)
return rc;
if (tb->tb_tokc + argc + 1 > tb->tb_tokm) {
size_t nmax = tb->tb_tokc + argc + 1;
char **nargv = realloc(tb->tb_tokv, sizeof(tb->tb_tokv[0]) * nmax);
if (!nargv)
return ENOMEM;
tb->tb_tokv = nargv;
tb->tb_tokm = nmax;
}
for (i = 0, p = tb->tb_base + start_level; i < argc; i++) {
tb->tb_tokv[tb->tb_tokc++] = p;
p += strlen(p) + 1;
}
tb->tb_tokv[tb->tb_tokc] = NULL;
return 0;
}
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