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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4973 | right-hear | 1 | #define OFF 20 |
| 2 | |||
| 3 | #include |
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| 4 | #include |
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| 5 | #include |
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| 6 | |||
| 7 | int main(int argc,char * argv[]) |
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| 8 | { |
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| 9 | FILE * f; |
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| 10 | char * buf; |
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| 11 | unsigned long sz,newsz; |
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| 12 | if(argc<3) |
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| 13 | { |
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| 14 | printf("Usage:\n"); |
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| 15 | printf("%s filename memsize_hex\n",argv[0]); |
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| 16 | printf("Example:\n\t%s test.app 100000\n",argv[0]); |
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| 17 | return -1; |
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| 18 | } |
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| 19 | sscanf(argv[2],"%x",&newsz); |
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| 20 | if(newsz<0x10000 || newsz>0x2000000) /* Min 64kB max 32MB */ |
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| 21 | { |
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| 22 | printf("Impossibly large memory size %x\n",newsz); |
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| 23 | return -1; |
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| 24 | } |
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| 25 | f=fopen(argv[1],"rb"); |
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| 26 | if(!f) |
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| 27 | { |
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| 28 | printf("Unable to open file\n"); |
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| 29 | return -1; |
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| 30 | } |
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| 31 | fseek(f,0,SEEK_END); |
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| 32 | sz=ftell(f); |
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| 33 | fseek(f,0,SEEK_SET); |
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| 34 | buf=malloc(sz); |
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| 35 | if(!buf) |
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| 36 | { |
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| 37 | printf("Unable to allocate temporary buffer\n"); |
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| 38 | fclose(f); |
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| 39 | return -1; |
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| 40 | } |
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| 41 | fread(buf,1,sz,f); |
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| 42 | fclose(f); |
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| 43 | f=fopen(argv[1],"wb"); |
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| 44 | *((unsigned long *)(buf+OFF))=newsz; |
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| 45 | fwrite(buf,1,sz,f); |
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| 46 | fclose(f); |
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| 47 | free(buf); |
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| 48 | return 0; |
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| 49 | } |