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OS/2 Shareware BBS: 10 Tools
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gbmsrc.zip
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gbm.c
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C/C++ Source or Header
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1999-01-17
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9KB
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348 lines
/*
gbm.c - Generalised Bitmap Module
*/
/*...sincludes:0:*/
#include <stdio.h>
#include <ctype.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#if defined(AIX) || defined(LINUX)
#include <unistd.h>
#else
#include <io.h>
#endif
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "gbm.h"
#include "gbmhelp.h"
/*...vgbm\46\h:0:*/
/*...vgbmhelp\46\h:0:*/
/*...e*/
/*...sentrypoints:0:*/
#include "gbmpgm.h"
#include "gbmppm.h"
#include "gbmbmp.h"
#include "gbmtga.h"
#include "gbmkps.h"
#include "gbmiax.h"
#include "gbmpcx.h"
#include "gbmtif.h"
#include "gbmlbm.h"
#include "gbmvid.h"
#include "gbmgif.h"
#include "gbmxbm.h"
#include "gbmspr.h"
#include "gbmpsg.h"
#include "gbmgem.h"
#include "gbmcvp.h"
#include "gbmjpg.h"
/*...vgbmpgm\46\h:0:*/
/*...vgbmppm\46\h:0:*/
/*...vgbmbmp\46\h:0:*/
/*...vgbmtga\46\h:0:*/
/*...vgbmkps\46\h:0:*/
/*...vgbmiax\46\h:0:*/
/*...vgbmpcx\46\h:0:*/
/*...vgbmtif\46\h:0:*/
/*...vgbmlbm\46\h:0:*/
/*...vgbmvid\46\h:0:*/
/*...vgbmgif\46\h:0:*/
/*...vgbmxbm\46\h:0:*/
/*...vgbmspr\46\h:0:*/
/*...vgbmpsg\46\h:0:*/
/*...vgbmgem\46\h:0:*/
/*...vgbmcvp\46\h:0:*/
/*...vgbmjpg\46\h:0:*/
typedef struct
{
GBM_ERR (*query_filetype)(GBMFT *gbmft);
GBM_ERR (*read_header )(const char *fn, int fd, GBM *gbm, const char *opt);
GBM_ERR (*read_palette)(int fd, GBM *gbm, GBMRGB *gbmrgb);
GBM_ERR (*read_data )(int fd, GBM *gbm, byte *data);
GBM_ERR (*write )(const char *fn, int fd, const GBM *gbm, const GBMRGB *gbmrgb, const byte *data, const char *opt);
const char * (*err )(GBM_ERR rc);
} FT;
static FT fts[] =
{
bmp_qft, bmp_rhdr, bmp_rpal, bmp_rdata, bmp_w, bmp_err,
gif_qft, gif_rhdr, gif_rpal, gif_rdata, gif_w, gif_err,
pcx_qft, pcx_rhdr, pcx_rpal, pcx_rdata, pcx_w, pcx_err,
tif_qft, tif_rhdr, tif_rpal, tif_rdata, tif_w, tif_err,
tga_qft, tga_rhdr, tga_rpal, tga_rdata, tga_w, tga_err,
lbm_qft, lbm_rhdr, lbm_rpal, lbm_rdata, lbm_w, lbm_err,
vid_qft, vid_rhdr, vid_rpal, vid_rdata, vid_w, vid_err,
pgm_qft, pgm_rhdr, pgm_rpal, pgm_rdata, pgm_w, pgm_err,
ppm_qft, ppm_rhdr, ppm_rpal, ppm_rdata, ppm_w, ppm_err,
kps_qft, kps_rhdr, kps_rpal, kps_rdata, kps_w, kps_err,
iax_qft, iax_rhdr, iax_rpal, iax_rdata, iax_w, iax_err,
xbm_qft, xbm_rhdr, xbm_rpal, xbm_rdata, xbm_w, xbm_err,
spr_qft, spr_rhdr, spr_rpal, spr_rdata, spr_w, spr_err,
psg_qft, psg_rhdr, psg_rpal, psg_rdata, psg_w, psg_err,
gem_qft, gem_rhdr, gem_rpal, gem_rdata, gem_w, gem_err,
cvp_qft, cvp_rhdr, cvp_rpal, cvp_rdata, cvp_w, cvp_err,
#ifdef IJG
jpg_qft, jpg_rhdr, jpg_rpal, jpg_rdata, jpg_w, jpg_err,
#endif
};
#define N_FT (sizeof(fts) / sizeof(fts[0]))
/*...e*/
/*...sextension:0:*/
static const char *extension(const char *fn)
{
const char *dot, *slash;
if ( (dot = strrchr(fn, '.')) == NULL )
return NULL;
if ( (slash = strpbrk(fn, "/\\")) == NULL )
return dot + 1;
return ( slash < dot ) ? dot + 1 : NULL;
}
/*...e*/
/*...sgbm_init:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_init(void)
{
return GBM_ERR_OK;
}
/*...e*/
/*...sgbm_deinit:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_deinit(void)
{
return GBM_ERR_OK;
}
/*...e*/
/*...sgbm_io_\42\:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_io_setup(
int (*open )(const char *fn, int mode),
int (*create)(const char *fn, int mode),
void (*close )(int fd),
long (*lseek )(int fd, long pos, int whence),
int (*read )(int fd, void *buf, int len),
int (*write )(int fd, const void *buf, int len)
)
{
gbm_file_open = open ;
gbm_file_create = create;
gbm_file_close = close ;
gbm_file_lseek = lseek ;
gbm_file_read = read ;
gbm_file_write = write ;
return GBM_ERR_OK;
}
GBMEXPORT int GBMENTRY gbm_io_open(const char *fn, int mode)
{ return gbm_file_open(fn, mode); }
GBMEXPORT int GBMENTRY gbm_io_create(const char *fn, int mode)
{ return gbm_file_create(fn, mode); }
GBMEXPORT void GBMENTRY gbm_io_close(int fd)
{ gbm_file_close(fd); }
GBMEXPORT long GBMENTRY gbm_io_lseek(int fd, long pos, int whence)
{ return gbm_file_lseek(fd, pos, whence); }
GBMEXPORT int GBMENTRY gbm_io_read (int fd, void *buf, int len)
{ return gbm_file_read(fd, buf, len); }
GBMEXPORT int GBMENTRY gbm_io_write(int fd, const void *buf, int len)
{ return gbm_file_write(fd, buf, len); }
/*...e*/
/*...sgbm_query_n_filetypes:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_query_n_filetypes(int *n_ft)
{
if ( n_ft == NULL )
return GBM_ERR_BAD_ARG;
*n_ft = N_FT;
return GBM_ERR_OK;
}
/*...e*/
/*...sgbm_guess_filetype:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_guess_filetype(const char *fn, int *ft)
{
int i;
const char *ext;
if ( fn == NULL || ft == NULL )
return GBM_ERR_BAD_ARG;
if ( (ext = extension(fn)) == NULL )
ext = "";
for ( i = 0; i < N_FT; i++ )
{
GBMFT gbmft;
char buf[100+1], *s;
fts[i].query_filetype(&gbmft);
for ( s = strtok(strcpy(buf, gbmft.extensions), " \t,");
s != NULL;
s = strtok(NULL, " \t,") )
if ( gbm_same(s, ext, (int) strlen(ext) + 1) )
{
*ft = i;
return GBM_ERR_OK;
}
}
return GBM_ERR_NOT_FOUND;
}
/*...e*/
/*...sgbm_query_filetype:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_query_filetype(int ft, GBMFT *gbmft)
{
if ( gbmft == NULL )
return GBM_ERR_BAD_ARG;
return (*fts[ft].query_filetype)(gbmft);
}
/*...e*/
/*...sgbm_read_header:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_read_header(const char *fn, int fd, int ft, GBM *gbm, const char *opt)
{
if ( fn == NULL || opt == NULL || gbm == NULL )
return GBM_ERR_BAD_ARG;
gbm_file_lseek(fd, 0L, SEEK_SET);
return (*fts[ft].read_header)(fn, fd, gbm, opt);
}
/*...e*/
/*...sgbm_read_palette:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_read_palette(int fd, int ft, GBM *gbm, GBMRGB *gbmrgb)
{
if ( gbm == NULL || gbmrgb == NULL )
return GBM_ERR_BAD_ARG;
return (*fts[ft].read_palette)(fd, gbm, gbmrgb);
}
/*...e*/
/*...sgbm_read_data:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_read_data(int fd, int ft, GBM *gbm, byte *data)
{
if ( gbm == NULL || data == NULL )
return GBM_ERR_BAD_ARG;
return (*fts[ft].read_data)(fd, gbm, data);
}
/*...e*/
/*...sgbm_write:0:*/
GBMEXPORT GBM_ERR GBMENTRY gbm_write(const char *fn, int fd, int ft, const GBM *gbm, const GBMRGB *gbmrgb, const byte *data, const char *opt)
{
if ( fn == NULL || opt == NULL )
return GBM_ERR_BAD_ARG;
return (*fts[ft].write)(fn, fd, gbm, gbmrgb, data, opt);
}
/*...e*/
/*...sgbm_err:0:*/
GBMEXPORT const char * GBMENTRY gbm_err(GBM_ERR rc)
{
int ft;
switch ( (int) rc )
{
case GBM_ERR_OK:
return "ok";
case GBM_ERR_MEM:
return "out of memory";
case GBM_ERR_NOT_SUPP:
return "not supported";
case GBM_ERR_BAD_OPTION:
return "bad option(s)";
case GBM_ERR_NOT_FOUND:
return "not found";
case GBM_ERR_BAD_MAGIC:
return "bad magic number / signiture block";
case GBM_ERR_BAD_SIZE:
return "bad bitmap size";
case GBM_ERR_READ:
return "can't read file";
case GBM_ERR_WRITE:
return "can't write file";
case GBM_ERR_BAD_ARG:
return "bad argument to gbm function";
}
for ( ft = 0; ft < N_FT; ft++ )
{
const char *s;
if ( (s = (*fts[ft].err)(rc)) != NULL )
return s;
}
return "general error";
}
/*...e*/
/*...sgbm_version:0:*/
GBMEXPORT int GBMENTRY gbm_version(void)
{
return 110; /* 1.10 */
}
/*...e*/
#ifdef OS2
/*...s_System entrypoints:0:*/
/* For GBM.DLL to be callable from IBM Smalltalk under OS/2, the entrypoints
must be of _System calling convention. These veneers help out here.
I can't just change the usual entrypoints because people depend on them. */
GBM_ERR _System Gbm_init(void)
{ return gbm_init(); }
GBM_ERR _System Gbm_deinit(void)
{ return gbm_deinit(); }
/* Gbm_io_setup omitted for now...
Implies GBM.DLL must call out to non-_Optlink callback routines. */
int _System Gbm_io_open(const char *fn, int mode)
{ return gbm_io_open(fn, mode); }
int _System Gbm_io_create(const char *fn, int mode)
{ return gbm_io_create(fn, mode); }
void _System Gbm_io_close(int fd)
{ gbm_io_close(fd); }
long _System Gbm_io_lseek(int fd, long pos, int whence)
{ return gbm_file_lseek(fd, pos, whence); }
int _System Gbm_io_read (int fd, void *buf, int len)
{ return gbm_file_read(fd, buf, len); }
int _System Gbm_io_write(int fd, const void *buf, int len)
{ return gbm_file_write(fd, buf, len); }
GBM_ERR _System Gbm_query_n_filetypes(int *n_ft)
{ return gbm_query_n_filetypes(n_ft); }
GBM_ERR _System Gbm_guess_filetype(const char *fn, int *ft)
{ return gbm_guess_filetype(fn, ft); }
GBM_ERR _System Gbm_query_filetype(int ft, GBMFT *gbmft)
{ return gbm_query_filetype(ft, gbmft); }
GBM_ERR _System Gbm_read_header(const char *fn, int fd, int ft, GBM *gbm, const char *opt)
{ return gbm_read_header(fn, fd, ft, gbm, opt); }
GBM_ERR _System Gbm_read_palette(int fd, int ft, GBM *gbm, GBMRGB *gbmrgb)
{ return gbm_read_palette(fd, ft, gbm, gbmrgb); }
GBM_ERR _System Gbm_read_data(int fd, int ft, GBM *gbm, byte *data)
{ return gbm_read_data(fd, ft, gbm, data); }
GBM_ERR _System Gbm_write(const char *fn, int fd, int ft, const GBM *gbm, const GBMRGB *gbmrgb, const byte *data, const char *opt)
{ return gbm_write(fn, fd, ft, gbm, gbmrgb, data, opt); }
const char * _System Gbm_err(GBM_ERR rc)
{ return gbm_err(rc); }
int _System Gbm_version(void)
{ return gbm_version(); }
/*...e*/
#endif