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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6432 | siemargl | 1 | #include |
| 7184 | siemargl | 2 | // non standard realization - support for virtually change ONLY ONE char |
| 3 | |||
| 4 | |||
| 5 | |||
| 6432 | siemargl | 6 | int ungetc(int c,FILE* file) |
| 7 | { |
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| 8 | dword res; |
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| 9 | |||
| 6433 | siemargl | 10 | if(!file) |
| 11 | { |
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| 12 | errno = E_INVALIDPTR; |
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| 13 | return EOF; |
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| 14 | } |
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| 6432 | siemargl | 15 | |
| 7184 | siemargl | 16 | if ((file->mode & 3) != FILE_OPEN_READ && (file->mode & FILE_OPEN_PLUS) == 0) |
| 6433 | siemargl | 17 | { |
| 18 | errno = E_ACCESS; |
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| 19 | return EOF; |
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| 20 | } |
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| 21 | |||
| 7184 | siemargl | 22 | if (file->filepos > file->filesize || file->filepos == 0 || c == EOF || file->ungetc_buf != EOF) |
| 6432 | siemargl | 23 | { |
| 6433 | siemargl | 24 | errno = E_EOF; |
| 6432 | siemargl | 25 | return EOF; |
| 26 | } |
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| 7184 | siemargl | 27 | |
| 28 | file->ungetc_buf = c; |
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| 6432 | siemargl | 29 | file->filepos--; |
| 30 | |||
| 31 | return c; |
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| 6433 | siemargl | 32 | } |