| 0,0 → 1,49 |
|---|
| #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; |
| } |