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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 8687 | turbocat | 1 | #include |
| 2 | #include |
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| 3 | #include |
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| 4 | //#include "format_scan.h" |
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| 5 | #include |
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| 6 | |||
| 7 | // non standard realization - support for virtually change ONLY ONE char |
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| 8 | |||
| 9 | static int __ungetc_emu(int c, FILE* stream) |
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| 10 | { |
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| 11 | unsigned res; |
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| 12 | if(stream){ |
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| 13 | errno = EINVAL; |
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| 14 | return EOF; |
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| 15 | } |
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| 16 | if ((stream->mode & 3) != _STDIO_F_R && (stream->mode & _STDIO_F_A) == 0){ |
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| 17 | errno = EACCES; |
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| 18 | return EOF; |
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| 19 | } |
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| 20 | ksys_bdfe_t *file_info = malloc(sizeof(ksys_bdfe_t)); |
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| 21 | if(file_info==NULL){ |
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| 22 | errno = ENOMEM; |
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| 23 | return EOF; |
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| 24 | } |
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| 25 | if(!_ksys_file_get_info(stream->name, file_info)){ |
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| 26 | errno = ENFILE; |
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| 27 | return EOF; |
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| 28 | } |
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| 29 | if (stream->position > file_info->size || stream->position == 0 || c == EOF || stream->__ungetc_emu_buff != EOF){ |
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| 30 | errno = EOF; |
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| 31 | return EOF; |
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| 32 | } |
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| 33 | |||
| 34 | stream->__ungetc_emu_buff = c; |
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| 35 | stream->position --; |
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| 36 | return c; |
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| 37 | } |
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| 38 | |||
| 39 | static int __virtual_getc_file(void *sp, const void *obj) |
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| 40 | { |
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| 41 | FILE *f = (FILE *)obj; |
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| 42 | int ch = fgetc(f); |
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| 43 | return ch; |
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| 44 | } |
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| 45 | |||
| 46 | static void __virtual_ungetc_file(void *sp, int c, const void *obj) |
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| 47 | { |
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| 48 | FILE *f = (FILE *)obj; |
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| 49 | if (f) __ungetc_emu(c, f); |
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| 50 | } |
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| 51 | |||
| 52 | int vfscanf(FILE * stream, const char * format, va_list arg) |
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| 53 | { |
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| 54 | return _format_scan(stream, format, arg, &__virtual_getc_file, &__virtual_ungetc_file); |
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| 55 | } |