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- /* pbmplus.h - header file for PBM, PGM, PPM, and PNM
- **
- ** Copyright (C) 1988, 1989, 1991 by Jef Poskanzer.
- **
- ** Permission to use, copy, modify, and distribute this software and its
- ** documentation for any purpose and without fee is hereby granted, provided
- ** that the above copyright notice appear in all copies and that both that
- ** copyright notice and this permission notice appear in supporting
- ** documentation. This software is provided "as is" without express or
- ** implied warranty.
- */
-
- #ifndef _PBMPLUS_H_
- #define _PBMPLUS_H_
-
- #include <sys/types.h>
- #include <ctype.h>
- #include <stdio.h>
-
- #if defined(USG) || defined(SVR4)
- #define SYSV
- #endif
- #if ! ( defined(BSD) || defined(SYSV) || defined(MSDOS) )
- /* CONFIGURE: If your system is >= 4.2BSD, set the BSD option; if you're a
- ** System V site, set the SYSV option; and if you're IBM-compatible, set
- ** MSDOS. If your compiler is ANSI C, you're probably better off setting
- ** SYSV - all it affects is string handling.
- */
- #define BSD
- /* #define SYSV */
- /* #define MSDOS */
- #endif
-
- /* CONFIGURE: If you want to enable writing "raw" files, set this option.
- ** "Raw" files are smaller, and much faster to read and write, but you
- ** must have a filesystem that allows all 256 ASCII characters to be read
- ** and written. You will no longer be able to mail P?M files without
- ** using uuencode or the equivalent, or running the files through pnmnoraw.
- ** Note that reading "raw" files works whether writing is enabled or not.
- */
- #define PBMPLUS_RAWBITS
-
- /* CONFIGURE: PGM can store gray values as either bytes or shorts. For most
- ** applications, bytes will be big enough, and the memory savings can be
- ** substantial. However, if you need more than 8 bits of grayscale resolution,
- ** then define this symbol.
- */
- /* #define PGM_BIGGRAYS */
-
- /* CONFIGURE: Normally, PPM handles a pixel as a struct of three grays.
- ** If grays are stored in bytes, that's 24 bits per color pixel; if
- ** grays are stored as shorts, that's 48 bits per color pixel. PPM
- ** can also be configured to pack the three grays into a single longword,
- ** 10 bits each, 30 bits per pixel.
- **
- ** If you have configured PGM with the PGM_BIGGRAYS option, AND you don't
- ** need more than 10 bits for each color component, AND you care more about
- ** memory use than speed, then this option might be a win. Under these
- ** circumstances it will make some of the programs use 1.5 times less space,
- ** but all of the programs will run about 1.4 times slower.
- **
- ** If you are not using PGM_BIGGRAYS, then this option is useless -- it
- ** doesn't save any space, but it still slows things down.
- */
- /* #define PPM_PACKCOLORS */
-
- /* CONFIGURE: uncomment this to enable debugging checks. */
- /* #define DEBUG */
-
- #ifndef _SCO_DS
- #ifdef SYSV
-
- #include <string.h>
- #define index(s,c) strchr(s,c)
- #define rindex(s,c) strrchr(s,c)
- #define srandom(s) srand(s)
- #define random rand
- #define bzero(dst,len) memset(dst,0,len)
- #define bcopy(src,dst,len) memcpy(dst,src,len)
- #define bcmp memcmp
- extern void srand();
- extern int rand();
-
- #else /*SYSV*/
-
- #include <strings.h>
- extern void srandom();
- extern long random();
-
- #endif /*SYSV*/
-
- extern int atoi();
- extern void exit();
- extern long time();
- extern int write();
- #endif /* _SCO_DS */
-
- /* CONFIGURE: On some systems, malloc.h doesn't declare these, so we have
- ** to do it. On other systems, for example HP/UX, it declares them
- ** incompatibly. And some systems, for example Dynix, don't have a
- ** malloc.h at all. A sad situation. If you have compilation problems
- ** that point here, feel free to tweak or remove these declarations.
- */
- #include <malloc.h>
- #ifndef _SCO_DS
- extern char* malloc();
- extern char* realloc();
- extern char* calloc();
- #endif /* _SCO_DS */
-
- /* CONFIGURE: Some systems don't have vfprintf(), which we need for the
- ** error-reporting routines. If you compile and get a link error about
- ** this routine, uncomment the first define, which gives you a vfprintf
- ** that uses the theoretically non-portable but fairly common routine
- ** _doprnt(). If you then get a link error about _doprnt, or
- ** message-printing doesn't look like it's working, try the second
- ** define instead.
- */
- /* #define NEED_VFPRINTF1 */
- /* #define NEED_VFPRINTF2 */
-
- /* End of configurable definitions. */
-
-
- #undef max
- #define max(a,b) ((a) > (b) ? (a) : (b))
- #undef min
- #define min(a,b) ((a) < (b) ? (a) : (b))
- #undef abs
- #define abs(a) ((a) >= 0 ? (a) : -(a))
- #undef odd
- #define odd(n) ((n) & 1)
-
-
- /* Definitions to make PBMPLUS work with either ANSI C or C Classic. */
-
- #if defined(__STDC__)
- #define ARGS(alist) alist
- #else /*__STDC__*/
- #define ARGS(alist) ()
- #define const
- #endif /*__STDC__*/
-
-
- /* Initialization. */
-
- void pm_init ARGS(( int* argcP, char* argv[] ));
-
-
- /* Variable-sized arrays definitions. */
-
- char** pm_allocarray ARGS(( int cols, int rows, int size ));
- char* pm_allocrow ARGS(( int cols, int size ));
- void pm_freearray ARGS(( char** its, int rows ));
- void pm_freerow ARGS(( char* itrow ));
-
-
- /* Case-insensitive keyword matcher. */
-
- int pm_keymatch ARGS(( char* str, char* keyword, int minchars ));
-
-
- /* Log base two hacks. */
-
- int pm_maxvaltobits ARGS(( int maxval ));
- int pm_bitstomaxval ARGS(( int bits ));
-
-
- /* Error handling definitions. */
-
- void pm_message ARGS(( char*, ... ));
- void pm_error ARGS(( char*, ... )); /* doesn't return */
- void pm_perror ARGS(( char* reason )); /* doesn't return */
- void pm_usage ARGS(( char* usage )); /* doesn't return */
-
-
- /* File open/close that handles "-" as stdin and checks errors. */
-
- FILE* pm_openr ARGS(( char* name ));
- FILE* pm_openw ARGS(( char* name ));
- void pm_close ARGS(( FILE* f ));
-
-
- /* Endian I/O. */
-
- int pm_readbigshort ARGS(( FILE* in, short* sP ));
- int pm_writebigshort ARGS(( FILE* out, short s ));
- int pm_readbiglong ARGS(( FILE* in, long* lP ));
- int pm_writebiglong ARGS(( FILE* out, long l ));
- int pm_readlittleshort ARGS(( FILE* in, short* sP ));
- int pm_writelittleshort ARGS(( FILE* out, short s ));
- int pm_readlittlelong ARGS(( FILE* in, long* lP ));
- int pm_writelittlelong ARGS(( FILE* out, long l ));
-
-
- #endif /*_PBMPLUS_H_*/
-