gistfile1.c

 /* pbm.h - header file for libpbm portable bitmap library
 */
 
 #ifndef _PBM_H_
 #define _PBM_H_
 
 #include <stdio.h>
 
 #define PBM_WHITE 0
 #define PBM_BLACK 1
 
 
 /* Magic constants. */
 
 #define PBM_MAGIC1 'P'
 #define PBM_MAGIC2 '1'
 #define RPBM_MAGIC2 '4'
 #define PBM_FORMAT (PBM_MAGIC1 * 256 + PBM_MAGIC2)
 #define RPBM_FORMAT (PBM_MAGIC1 * 256 + RPBM_MAGIC2)
 #define PBM_TYPE PBM_FORMAT
 
 
 /* Macro for turning a format number into a type number. */
 
 #define PBM_FORMAT_TYPE(f) \
   ((f) == PBM_FORMAT || (f) == RPBM_FORMAT ? PBM_TYPE : -1)
 
 
 typedef unsigned char bit;
 
 /* Declarations of routines. */
 
 bit ** pbm_allocarray(int cols, int rows);
 void pbm_freearray(bit ** img, int rows); 
 
 bit** pbm_readpbm(FILE* file, int* colsP, int* rowsP);
 
 void pbm_writepbm (FILE* file, bit** bits, int cols, int rows, int forceplain);
 
 
 #endif /*_PBM_H_*/