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/* dctrl-tools - Debian control file inspection tools
Copyright (C) 2003 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 "msg.h"
#include "paragraph.h"
void para_init(para_t * para, FSAF * fp, fieldtrie_t * trie)
{
para->fp = fp;
para->trie = trie;
para->start = 0;
para->end = 0;
para->eof = false;
para_parse_next(para);
}
void para_parse_next(para_t * para)
{
debug_message("para_parse_next", 0);
para->start = para->end;
fsaf_invalidate(para->fp, para->start);
register enum { START, FIELD_NAME, BODY, BODY_NEWLINE,
BODY_SKIPBLANKS, END } state = START;
register size_t pos = para->start;
register FSAF * fp = para->fp;
size_t field_start = 0;
struct field_data * field_data = 0;
while (state != END) {
int c = fsaf_getc(fp, pos++);
switch (state) {
case START:
switch (c) {
case -1:
para->eof = true;
state = END;
break;
case '\n':
para->start++;
break;
default:
field_start = --pos;
state = FIELD_NAME;
}
break;
case FIELD_NAME:
switch (c) {
case -1:
message(L_FATAL, "unexpected end of file", 0);
exit(EXIT_FAILURE);
case ':': {
size_t len = (pos-1) - field_start;
struct fsaf_read_rv r = fsaf_read(fp, field_start, len);
assert(r.len == len);
size_t inx = fieldtrie_lookup(para->trie, r.b, len);
if (inx == -1) {
field_data = 0;
} else {
assert(inx < MAX_FIELDS);
field_data = ¶->fields[inx];
field_data->start = pos;
}
state = BODY;
}
break;
case '\n':
message(L_FATAL, "unexpected end of line", 0);
exit(EXIT_FAILURE);
}
break;
case BODY:
switch (c) {
case -1:
message(L_FATAL, "unexpected end of file", 0);
exit(EXIT_FAILURE);
case '\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;
}
}
state = BODY_NEWLINE;
break;
}
break;
case BODY_NEWLINE:
switch (c) {
case -1:
para->eof = true;
/* pass through */
case '\n':
state = END;
break;
case ' ': case '\t':
state = BODY_SKIPBLANKS;
break;
default:
field_start = --pos;
state = FIELD_NAME;
}
break;
case BODY_SKIPBLANKS:
switch (c) {
case -1:
/* pass through */
case '\n':
state = END;
break;
case ' ': case '\t':
break;
default:
state = BODY;
}
break;
case END: assert(0);
}
}
para->end = pos-1;
}
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