[444] | 1 | /*- |
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| 2 | * Code created by modifying iscanf.c which has following copyright. |
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| 3 | * |
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| 4 | * Copyright (c) 1990 The Regents of the University of California. |
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| 5 | * All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms are permitted |
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| 8 | * provided that the above copyright notice and this paragraph are |
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| 9 | * duplicated in all such forms and that any documentation, |
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| 10 | * advertising materials, and other materials related to such |
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| 11 | * distribution and use acknowledge that the software was developed |
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| 12 | * by the University of California, Berkeley. The name of the |
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| 13 | * University may not be used to endorse or promote products derived |
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| 14 | * from this software without specific prior written permission. |
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| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 18 | */ |
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| 19 | |
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| 20 | /* |
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| 21 | FUNCTION |
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| 22 | <<viscanf>>, <<vfiscanf>>, <<vsiscanf>>---format argument list |
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| 23 | |
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| 24 | INDEX |
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| 25 | viscanf |
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| 26 | INDEX |
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| 27 | _viscanf_r |
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| 28 | INDEX |
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| 29 | vfiscanf |
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| 30 | INDEX |
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| 31 | _vfiscanf_r |
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| 32 | INDEX |
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| 33 | vsiscanf |
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| 34 | INDEX |
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| 35 | _vsiscanf_r |
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| 36 | |
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| 37 | SYNOPSIS |
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| 38 | #include <stdio.h> |
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| 39 | #include <stdarg.h> |
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| 40 | int viscanf(const char *<[fmt]>, va_list <[list]>); |
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| 41 | int vfiscanf(FILE *<[fp]>, const char *<[fmt]>, va_list <[list]>); |
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| 42 | int vsiscanf(const char *<[str]>, const char *<[fmt]>, va_list <[list]>); |
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| 43 | |
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| 44 | int _viscanf_r(struct _reent *<[reent]>, const char *<[fmt]>, |
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| 45 | va_list <[list]>); |
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| 46 | int _vfiscanf_r(struct _reent *<[reent]>, FILE *<[fp]>, const char *<[fmt]>, |
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| 47 | va_list <[list]>); |
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| 48 | int _vsiscanf_r(struct _reent *<[reent]>, const char *<[str]>, |
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| 49 | const char *<[fmt]>, va_list <[list]>); |
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| 50 | |
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| 51 | DESCRIPTION |
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| 52 | <<viscanf>>, <<vfiscanf>>, and <<vsiscanf>> are (respectively) variants |
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| 53 | of <<iscanf>>, <<fiscanf>>, and <<siscanf>>. They differ only in |
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| 54 | allowing their caller to pass the variable argument list as a |
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| 55 | <<va_list>> object (initialized by <<va_start>>) rather than |
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| 56 | directly accepting a variable number of arguments. |
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| 57 | |
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| 58 | RETURNS |
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| 59 | The return values are consistent with the corresponding functions: |
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| 60 | <<viscanf>> returns the number of input fields successfully scanned, |
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| 61 | converted, and stored; the return value does not include scanned |
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| 62 | fields which were not stored. |
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| 63 | |
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| 64 | If <<viscanf>> attempts to read at end-of-file, the return value |
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| 65 | is <<EOF>>. |
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| 66 | |
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| 67 | If no fields were stored, the return value is <<0>>. |
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| 68 | |
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| 69 | The routines <<_viscanf_r>>, <<_vfiscanf_f>>, and <<_vsiscanf_r>> are |
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| 70 | reentrant versions which take an additional first parameter which points to the |
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| 71 | reentrancy structure. |
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| 72 | |
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| 73 | PORTABILITY |
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| 74 | These are newlib extensions. |
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| 75 | |
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| 76 | Supporting OS subroutines required: |
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| 77 | */ |
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| 78 | |
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| 79 | #include <_ansi.h> |
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| 80 | #include <reent.h> |
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| 81 | #include <stdio.h> |
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| 82 | #include <stdarg.h> |
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| 83 | #include "local.h" |
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| 84 | |
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| 85 | #ifndef _REENT_ONLY |
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| 86 | |
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| 87 | int |
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| 88 | viscanf (const char *fmt, |
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| 89 | va_list ap) |
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| 90 | { |
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| 91 | struct _reent *reent = _REENT; |
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| 92 | |
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| 93 | _REENT_SMALL_CHECK_INIT (reent); |
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| 94 | return __svfiscanf_r (reent, _stdin_r (reent), fmt, ap); |
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| 95 | } |
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| 96 | |
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| 97 | #endif /* !_REENT_ONLY */ |
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| 98 | |
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| 99 | int |
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| 100 | _viscanf_r (struct _reent *ptr, |
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| 101 | const char *fmt, |
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| 102 | va_list ap) |
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| 103 | { |
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| 104 | _REENT_SMALL_CHECK_INIT (ptr); |
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| 105 | return __svfiscanf_r (ptr, _stdin_r (ptr), fmt, ap); |
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| 106 | } |
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| 107 | |
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