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/* dctrl-tools - Debian control file inspection tools
Copyright © 2003, 2004, 2008 Antti-Juhani Kaijanaho
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include "msg.h"
#include "paragraph.h"
#include "strutil.h"
void para_parser_init(para_parser_t * pp, FSAF * fp,
bool invalidate_p, bool ignore_failing_paras,
bool register_unknown_fields)
{
pp->fp = fp;
pp->eof = false;
pp->loc = 0;
pp->line = 1;
pp->invalidate_p = invalidate_p;
pp->ignore_broken_paras = ignore_failing_paras;
pp->register_unknown_fields = register_unknown_fields;
}
void para_init(para_parser_t * pp, para_t * para)
{
para->common = pp;
para->line = pp->line;
para->start = 0;
para->end = 0;
para->fields = 0;
para->nfields = 0;
para->nfields = fieldtrie_count();
para->fields = malloc(para->nfields * sizeof *para->fields);
if (para->fields == 0) fatal_enomem(0);
}
void para_finalize(para_t * para)
{
para->common = 0;
para->start = 0;
para->end = 0;
if (para->fields != 0) {
free(para->fields);
}
para->nfields = 0;
para->fields = 0;
}
static struct field_data * register_field(para_t * para,
char const * s, size_t slen)
{
size_t inx = fieldtrie_insert_n(s, slen)->inx;
if (inx >= para->nfields) {
assert(para->nfields > 0);
para->nfields = para->nfields * 2;
para->fields = realloc(para->fields,
para->nfields * sizeof(para->fields[0])
);
if (para->fields == 0) fatal_enomem(0);
}
struct field_data *field_data = ¶->fields[inx];
return field_data;
}
void para_parse_next(para_t * para)
{
redo:
assert(para != 0);
para_parser_t * pp = para->common;
para->start = pp->loc;
para->line = pp->line;
for (size_t i = 0; i < para->nfields; i++) {
para->fields[i].start = 0;
para->fields[i].end = 0;
}
if (pp->invalidate_p) {
fsaf_invalidate(pp->fp, para->start);
}
register size_t pos = para->start;
register size_t line = para->line;
register FSAF * fp = pp->fp;
size_t field_start = 0;
struct field_data * field_data = 0;
#define GETC (c = fsaf_getc(fp, pos++), c == '\n' ? line++ : line)
int c;
START:
GETC;
switch (c) {
case -1:
pp->eof = true;
goto END;
case '\n':
para->start++;
goto START;
case '#':
para->start++;
goto START_SKIPCOMMENT;
default:
field_start = --pos;
goto FIELD_NAME;
}
assert(0);
START_SKIPCOMMENT:
GETC;
switch (c) {
case -1:
pp->eof = true;
goto END;
case '\n':
para->start++;
goto START;
default:
para->start++;
goto START_SKIPCOMMENT;
}
FIELD_NAME:
GETC;
switch (c) {
case '\n': case -1:
if (pp->ignore_broken_paras) {
line_message(L_IMPORTANT, fp->fname,
c == '\n' ?line-1:line,
_("warning: expected a colon"));
goto FAIL;
} else {
line_message(L_FATAL, fp->fname,
c == '\n' ?line-1:line,
_("expected a colon"));
fail();
}
break;
case ':': {
size_t len = (pos-1) - field_start;
struct fsaf_read_rv r = fsaf_read(fp,
field_start,
len);
assert(r.len == len);
struct field_attr *attr =
fieldtrie_lookup(r.b, len);
if (attr == NULL) {
if (para->common->
register_unknown_fields) {
field_data =
register_field(para,
r.b,
len);
} else {
field_data = 0;
}
} else {
assert(attr->inx < para->nfields);
field_data = ¶->fields[attr->inx];
}
if (field_data != NULL) {
field_data->start = pos;
field_data->line = line;
}
goto BODY;
}
default:
goto FIELD_NAME;
}
assert(0);
BODY:
GETC;
if (c == -1 || c == '\n') {
if (field_data != 0) {
field_data->end = pos-1;
while (field_data->start < field_data->end
&& fsaf_getc(fp, field_data->start)
== ' ') {
++field_data->start;
}
}
goto BODY_NEWLINE;
}
if (c != -1) goto BODY; else goto BODY_NEWLINE;
assert(0);
BODY_NEWLINE:
GETC;
switch (c) {
case -1:
//para->eof = true;
/* pass through */
case '\n':
goto END;
case ' ': case '\t':
goto BODY_SKIPBLANKS;
case '#':
goto BODY_SKIPCOMMENT;
default:
field_start = --pos;
goto FIELD_NAME;
}
assert(0);
BODY_SKIPBLANKS:
GETC;
switch (c) {
case -1:
/* pass through */
case '\n':
goto END;
break;
case ' ': case '\t':
goto BODY_SKIPBLANKS;
default:
goto BODY;
}
assert(0);
BODY_SKIPCOMMENT:
GETC;
switch (c) {
case -1:
/* pass through */
case '\n':
goto BODY_NEWLINE;
default:
goto BODY_SKIPCOMMENT;
}
#undef GETC
FAIL:
do {
c = fsaf_getc(fp, pp->loc++);
if (c == '\n') pp->line++;
} while (c != -1 && c != '\n');
goto redo;
END:
para->end = pos-2;
pp->loc = para->end;
pp->line = fsaf_getc(fp, pp->loc) == '\n' ? line-1 : line;
}
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