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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6432 | siemargl | 1 | #include |
| 2 | // non standard realization - no support for virtually change char |
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| 3 | int ungetc(int c,FILE* file) |
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| 4 | { |
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| 5 | dword res; |
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| 6 | |||
| 6433 | siemargl | 7 | if(!file) |
| 8 | { |
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| 9 | errno = E_INVALIDPTR; |
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| 10 | return EOF; |
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| 11 | } |
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| 6432 | siemargl | 12 | |
| 6433 | siemargl | 13 | if ((file->mode & 3!=FILE_OPEN_READ) && (file->mode & FILE_OPEN_PLUS==0)) |
| 14 | { |
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| 15 | errno = E_ACCESS; |
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| 16 | return EOF; |
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| 17 | } |
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| 18 | |||
| 6432 | siemargl | 19 | if (file->filepos>file->filesize || file->filepos==0) |
| 20 | { |
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| 6433 | siemargl | 21 | errno = E_EOF; |
| 6432 | siemargl | 22 | return EOF; |
| 23 | } |
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| 24 | file->filepos--; |
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| 25 | |||
| 26 | return c; |
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| 6433 | siemargl | 27 | } |