1 | /* |
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2 | FUNCTION |
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3 | <<stdio_ext>>,<<__fbufsize>>,<<__fpending>>,<<__flbf>>,<<__freadable>>,<<__fwritable>>,<<__freading>>,<<__fwriting>>---access internals of FILE structure |
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4 | |
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5 | INDEX |
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6 | __fbufsize |
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7 | INDEX |
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8 | __fpending |
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9 | INDEX |
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10 | __flbf |
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11 | INDEX |
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12 | __freadable |
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13 | INDEX |
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14 | __fwritable |
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15 | INDEX |
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16 | __freading |
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17 | INDEX |
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18 | __fwriting |
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19 | |
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20 | SYNOPSIS |
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21 | #include <stdio.h> |
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22 | #include <stdio_ext.h> |
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23 | size_t __fbufsize(FILE *<[fp]>); |
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24 | size_t __fpending(FILE *<[fp]>); |
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25 | int __flbf(FILE *<[fp]>); |
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26 | int __freadable(FILE *<[fp]>); |
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27 | int __fwritable(FILE *<[fp]>); |
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28 | int __freading(FILE *<[fp]>); |
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29 | int __fwriting(FILE *<[fp]>); |
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30 | |
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31 | DESCRIPTION |
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32 | These functions provides access to the internals of the FILE structure <[fp]>. |
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33 | |
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34 | RETURNS |
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35 | <<__fbufsize>> returns the number of bytes in the buffer of stream <[fp]>. |
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36 | |
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37 | <<__fpending>> returns the number of bytes in the output buffer of stream <[fp]>. |
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38 | |
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39 | <<__flbf>> returns nonzero if stream <[fp]> is line-buffered, and <<0>> if not. |
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40 | |
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41 | <<__freadable>> returns nonzero if stream <[fp]> may be read, and <<0>> if not. |
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42 | |
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43 | <<__fwritable>> returns nonzero if stream <[fp]> may be written, and <<0>> if not. |
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44 | |
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45 | <<__freading>> returns nonzero if stream <[fp]> if the last operation on |
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46 | it was a read, or if it read-only, and <<0>> if not. |
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47 | |
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48 | <<__fwriting>> returns nonzero if stream <[fp]> if the last operation on |
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49 | it was a write, or if it write-only, and <<0>> if not. |
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50 | |
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51 | PORTABILITY |
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52 | These functions originate from Solaris and are also provided by GNU libc. |
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53 | |
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54 | No supporting OS subroutines are required. |
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55 | */ |
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56 | |
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57 | #ifndef __rtems__ |
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58 | |
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59 | #include <_ansi.h> |
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60 | #include <stdio.h> |
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61 | |
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62 | /* Subroutine versions of the inline or macro functions. */ |
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63 | |
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64 | size_t |
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65 | __fbufsize (FILE * fp) |
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66 | { |
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67 | return (size_t) fp->_bf._size; |
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68 | } |
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69 | |
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70 | size_t |
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71 | __fpending (FILE * fp) |
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72 | { |
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73 | return fp->_p - fp->_bf._base; |
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74 | } |
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75 | |
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76 | int |
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77 | __flbf (FILE * fp) |
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78 | { |
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79 | return (fp->_flags & __SLBF) != 0; |
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80 | } |
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81 | |
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82 | int |
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83 | __freadable (FILE * fp) |
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84 | { |
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85 | return (fp->_flags & (__SRD | __SRW)) != 0; |
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86 | } |
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87 | |
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88 | int |
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89 | __fwritable (FILE * fp) |
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90 | { |
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91 | return (fp->_flags & (__SWR | __SRW)) != 0; |
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92 | } |
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93 | |
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94 | int |
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95 | __freading (FILE * fp) |
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96 | { |
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97 | return (fp->_flags & __SRD) != 0; |
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98 | } |
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99 | |
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100 | int |
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101 | __fwriting (FILE * fp) |
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102 | { |
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103 | return (fp->_flags & __SWR) != 0; |
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104 | } |
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105 | |
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106 | #endif /* __rtems__ */ |
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