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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 145 | halyavin | 1 | #include "stdio.h" |
| 2 | #include "string.h" |
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| 3 | FILE* fopen(const char* filename, const char *mode) |
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| 4 | { |
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| 5 | FILE* res; |
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| 6 | int imode; |
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| 7 | imode=0; |
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| 8 | if (*mode=='r') |
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| 9 | { |
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| 10 | imode=FILE_OPEN_READ; |
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| 11 | mode++; |
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| 12 | }else if (*mode=='w') |
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| 13 | { |
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| 14 | imode=FILE_OPEN_WRITE; |
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| 15 | mode++; |
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| 16 | }else if (*mode=='a') |
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| 17 | { |
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| 18 | imode=FILE_OPEN_APPEND; |
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| 19 | mode++; |
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| 20 | }else |
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| 21 | return 0; |
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| 22 | if (*mode=='t') |
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| 23 | { |
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| 24 | imode|=FILE_OPEN_TEXT; |
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| 25 | mode++; |
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| 26 | }else if (*mode=='b') |
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| 27 | mode++; |
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| 28 | if (*mode=='+') |
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| 29 | { |
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| 30 | imode|=FILE_OPEN_PLUS; |
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| 31 | mode++; |
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| 32 | } |
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| 33 | if (*mode!=0) |
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| 34 | return 0; |
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| 35 | res=malloc(sizeof(FILE)); |
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| 36 | res->buffer=0; |
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| 37 | res->buffersize=0; |
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| 38 | res->filesize=0; |
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| 39 | res->filepos=0; |
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| 40 | res->filename=0; |
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| 41 | res->mode=imode; |
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| 42 | //check if file exists |
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| 244 | victor | 43 | res=_msys_read_file(filename, 0, 0, 0, &res->filesize); |
| 145 | halyavin | 44 | if (res==5) |
| 45 | { |
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| 46 | if ((imode & 3) == FILE_OPEN_READ) |
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| 47 | { |
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| 48 | free(res); |
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| 49 | return 0; |
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| 50 | } |
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| 244 | victor | 51 | res=_msys_create_file(filename); |
| 145 | halyavin | 52 | if (res!=0) |
| 53 | { |
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| 54 | free(res); |
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| 55 | return 0; |
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| 56 | } |
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| 57 | res->filesize=0; |
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| 58 | } |
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| 59 | if (imode & 3==FILE_OPEN_WRITE) |
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| 60 | { |
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| 61 | res->buffersize=512; |
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| 62 | res->buffer=malloc(res->buffersize); |
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| 63 | if (res->buffer=0) |
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| 64 | { |
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| 65 | free(res); |
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| 66 | return 0; |
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| 67 | } |
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| 68 | res->filesize=0; |
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| 69 | }else |
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| 70 | { |
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| 71 | res->buffersize=(res->filesize & (~511))+512; |
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| 72 | res->buffer=malloc(res->buffersize); |
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| 73 | if (res->buffer==0) |
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| 74 | { |
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| 75 | free(res); |
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| 76 | return 0; |
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| 77 | } |
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| 78 | res=_msys_read_file(filename,0,res->filesize,res->buffer,0); |
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| 79 | if (res!=0) |
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| 80 | { |
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| 81 | free(res->buffer); |
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| 82 | free(res); |
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| 83 | } |
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| 84 | if (imode & 3==FILE_OPEN_APPEND) |
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| 85 | res->filepos=res->filesize; |
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| 86 | } |
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| 87 | res->filename=strdup(filename); |
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| 88 | return res; |
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| 89 | } |