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/* dctrl-tools - Debian control file inspection tools
Copyright © 2003, 2004, 2008, 2010, 2011 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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 = 0;
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->nfields = fieldtrie_count();
para->maxfields = para->nfields;
if (para->nfields > 0) {
para->fields = malloc(para->nfields * sizeof *para->fields);
if (para->fields == 0) fatal_enomem(0);
for (size_t i = 0; i < para->nfields; i++) {
para->fields[i].first = 0;
para->fields[i].last = 0;
}
} else {
para->fields = NULL;
}
}
void para_finalize(para_t * para)
{
para->common = 0;
para->start = 0;
para->end = 0;
if (para->fields != 0) {
for (size_t i = 0; i < para->nfields; i++) {
struct field_datum *fp = para->fields[i].first;
while (fp != 0) {
struct field_datum *tmp = fp;
fp = fp->next;
free(tmp);
}
}
free(para->fields);
}
para->maxfields = 0;
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->maxfields) {
if (para->maxfields == 0) para->maxfields = 2;
while (inx >= para->maxfields) {
para->maxfields = para->maxfields * 2;
}
para->fields = realloc(para->fields,
para->maxfields *
sizeof(para->fields[0]));
if (para->fields == 0) fatal_enomem(0);
}
if (inx >= para->nfields) {
para->nfields = inx + 1;
para->fields[inx].first = 0;
para->fields[inx].last = 0;
}
assert(para->nfields <= para->maxfields);
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++) {
struct field_datum *fp = para->fields[i].first;
while (fp != 0) {
struct field_datum *tmp = fp;
fp = fp->next;
free(tmp);
}
para->fields[i].first = 0;
para->fields[i].last = 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_datum * field_datum = 0;
#define GETC (c = fsaf_getc(fp, pos++), c == '\n' ? line++ : line)
#define UNGETC (fsaf_getc(fp, --pos) == '\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:
UNGETC;
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) {
register_field(para, r.b, len);
}
}
attr = fieldtrie_lookup(r.b, len);
if (attr == NULL) {
field_datum = 0;
} else {
assert(attr->inx < para->nfields);
struct field_data * fds = ¶->fields[attr->inx];
assert((fds->first == 0) == (fds->last == 0));
field_datum = malloc(sizeof *field_datum);
if (field_datum == 0) enomem(0);
field_datum->start = pos;
field_datum->line = line;
field_datum->name_start = field_start;
field_datum->name_end = pos-1;
field_datum->next = 0;
field_datum->prev = fds->last;
if (fds->last != 0) fds->last->next = field_datum;
fds->last = field_datum;
if (fds->first == 0) fds->first = field_datum;
}
goto BODY;
}
default:
goto FIELD_NAME;
}
assert(0);
BODY:
GETC;
if (c == -1 || c == '\n') {
if (field_datum != 0) {
field_datum->end = pos-1;
while (field_datum->start < field_datum->end
&& fsaf_getc(fp, field_datum->start)
== ' ') {
++field_datum->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:
UNGETC;
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:
UNGETC;
UNGETC;
para->end = pos;
pp->loc = para->end;
pp->line = line;
}
|
