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/* catdvi - get text from DVI files
Copyright (C) 2001 Bjoern Brill <brill@fs.math.uni-frankfurt.de>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef PAGEREF_H
#define PAGEREF_H
#include "bytesex.h"
enum pageref_flavour_t {
PRF_INVALID = 0,
PRF_PHYSICAL,
PRF_COUNT0,
PRF_COUNT0_CHAPTER,
PRF_COMPLETE
};
typedef enum pageref_flavour_t pageref_flavour_t;
typedef struct pageref_t {
sint32 physical;
sint32 count0;
sint32 chapter;
enum pageref_flavour_t flavour;
} pageref_t;
/* Make up a pageref_t from a string (syntax documented in catdvi manpage).
* Return flavour (!= 0 if no error).
* If an error occurs, we return PRF_INVALID (== 0) and do NOT modify *this.
*/
pageref_flavour_t pageref_parse(pageref_t * this, const char * pagespec);
/* \count0 usually holds the TeX page number. Plain TeX uses negative count0
* values for roman-numbered frontmatter (preface, toc, etc.) so we have
* the integers ordered like -1 < -2 < -3 < ... < 0 < 1 < 2 < 3 < ...
* (0 shouldn't appear as page number though).
*
* Compare two count0 values wrt this ordering. Return value like strcmp.
*/
int pageref_count0_cmp(sint32 a, sint32 b);
/* Compare two page references, given their flavours are compatible.
* Return value like strcmp.
*/
int pageref_cmp(const struct pageref_t * a, const struct pageref_t * b);
void pageref_print(pageref_t * this, FILE * f);
#endif /* PAGEREF_H */
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