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dbof.c
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dbof.c
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/*
* Copyright 2024 S. V. Nickolas.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the Software), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
int main (int argc, char **argv)
{
FILE *in, *out;
size_t off, len, cur;
if (argc!=5)
{
fprintf (stderr, "usage: %s source target offset length\n"
" all values in hexadecimal\n", argv[0]);
return 1;
}
off=len=cur=0;
off=strtoul(argv[3], NULL, 16);
len=strtoul(argv[4], NULL, 16);
if (!off)
{
fprintf (stderr, "invalid offset %s\n", argv[3]);
return 1;
}
if (!len)
{
fprintf (stderr, "invalid length %s\n", argv[4]);
return 1;
}
in=fopen(argv[1],"rb");
if (!in)
{
perror(argv[1]);
return 1;
}
out=fopen(argv[2],"wt");
if (!out)
{
fclose(in);
perror(argv[2]);
return 1;
}
fseek(in,off,SEEK_SET);
for (cur=0; cur<len; cur++)
{
int c;
c=fgetc(in);
if (c<0)
{
fclose(in);
fclose(out);
perror(argv[1]);
return 1;
}
if (cur&&(!(cur&7))) fprintf(out,"\n");
if (!(cur&7))
fprintf(out, " DB ");
else
fprintf(out, ", ");
fprintf (out, "0%02XH",c);
}
fprintf (out, "\n");
fclose(out);
return 0;
}