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/* dctrl-tools - Debian control file inspection tools
Copyright © 2003, 2004, 2005, 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.
*/
#ifndef PARAGRAPH_H
#define PARAGRAPH_H
#define MAX_FIELDS 100
#include <stddef.h>
#include "fsaf.h"
#include "fieldtrie.h"
struct field_data {
_Bool present;
size_t line;
size_t start, end; /* offsets to the file; [start,end) is the body */
size_t name_start, name_end; /* as start and end, but for the name */
};
struct paragraph_parser {
bool eof;
bool invalidate_p;
FSAF * fp;
size_t loc;
size_t line;
bool ignore_broken_paras;
bool register_unknown_fields;
};
struct paragraph {
size_t line;
struct paragraph_parser * common;
size_t start, end; /* offsets to the file; [start,end) is the paragraph */
size_t nfields, maxfields;
struct field_data * fields;
};
typedef struct paragraph_parser para_parser_t;
typedef struct paragraph para_t;
/* Initialize the given para_parser_t, associating with it the given FSAF. */
void para_parser_init(para_parser_t *, FSAF *,
bool invalidate_p, bool ignore_broken_paras,
bool register_unknown_fields);
/* Initialize the given para_t for the given parser. */
void para_init(para_parser_t *, para_t *);
void para_parse_next(para_t *);
static inline
struct fsaf_read_rv get_whole_para(para_t * p)
{
return fsaf_read(p->common->fp, p->start, p->end - p->start);
}
static inline
struct field_data * find_field(const para_t *p, size_t fld_inx)
{
struct field_data * fd = fld_inx < p->nfields
? &p->fields[fld_inx]
: NULL;
if (fd != NULL && !fd->present) fd = NULL;
return fd;
}
static inline
struct field_data *find_field_wr(const para_t *p,
size_t fld_inx,
size_t repl_inx)
{
struct field_data * fd = find_field(p, fld_inx);
if ((fd == NULL || fd->start == fd->end) && repl_inx != (size_t)(-1)) {
fd = find_field(p, repl_inx);
}
return fd;
}
static inline
struct fsaf_read_rv get_field(para_t * p, size_t fld_inx, size_t repl_inx)
{
struct field_data *fd = find_field_wr(p, fld_inx, repl_inx);
if (fd == NULL) {
const struct fsaf_read_rv fail = {
.b = NULL,
.len = 0
};
return fail;
}
return fsaf_read(p->common->fp, fd->start, fd->end - fd->start);
}
static inline
char * get_field_as(const para_t * p, size_t fld_inx)
{
struct field_data * fd = find_field(p, fld_inx);
if (fd == NULL) return strdup("");
return fsaf_getas(p->common->fp, fd->start, fd->end - fd->start);
}
static inline
bool para_eof(para_parser_t * para) { return para->eof; }
#endif /* PARAGRAPH_H */
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