kolibrios/programs/develop/libraries/menuetlibc/linuxtools/mchmem.c

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#define OFF 20
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main(int argc,char * argv[])
{
FILE * f;
char * buf;
unsigned long sz,newsz;
if(argc<3)
{
printf("Usage:\n");
printf("%s filename memsize_hex\n",argv[0]);
printf("Example:\n\t%s test.app 100000\n",argv[0]);
return -1;
}
sscanf(argv[2],"%x",&newsz);
if(newsz<0x10000 || newsz>0x2000000) /* Min 64kB max 32MB */
{
printf("Impossibly large memory size %x\n",newsz);
return -1;
}
f=fopen(argv[1],"rb");
if(!f)
{
printf("Unable to open file\n");
return -1;
}
fseek(f,0,SEEK_END);
sz=ftell(f);
fseek(f,0,SEEK_SET);
buf=malloc(sz);
if(!buf)
{
printf("Unable to allocate temporary buffer\n");
fclose(f);
return -1;
}
fread(buf,1,sz,f);
fclose(f);
f=fopen(argv[1],"wb");
*((unsigned long *)(buf+OFF))=newsz;
fwrite(buf,1,sz,f);
fclose(f);
free(buf);
return 0;
}