1 | /* |
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2 | * Copyright (c) 1990 The Regents of the University of California. |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms are permitted |
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6 | * provided that the above copyright notice and this paragraph are |
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7 | * duplicated in all such forms and that any documentation, |
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8 | * advertising materials, and other materials related to such |
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9 | * distribution and use acknowledge that the software was developed |
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10 | * by the University of California, Berkeley. The name of the |
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11 | * University may not be used to endorse or promote products derived |
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12 | * from this software without specific prior written permission. |
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13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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16 | */ |
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17 | |
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18 | /* |
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19 | FUNCTION |
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20 | <<siscanf>>, <<fiscanf>>, <<iscanf>>---scan and format non-floating input |
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21 | |
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22 | INDEX |
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23 | iscanf |
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24 | INDEX |
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25 | _iscanf_r |
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26 | INDEX |
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27 | fiscanf |
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28 | INDEX |
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29 | _fiscanf_r |
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30 | INDEX |
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31 | siscanf |
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32 | INDEX |
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33 | _siscanf_r |
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34 | |
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35 | SYNOPSIS |
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36 | #include <stdio.h> |
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37 | |
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38 | int iscanf(const char *<[format]>, ...); |
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39 | int fiscanf(FILE *<[fd]>, const char *<[format]>, ...); |
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40 | int siscanf(const char *<[str]>, const char *<[format]>, ...); |
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41 | |
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42 | int _iscanf_r(struct _reent *<[ptr]>, const char *<[format]>, ...); |
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43 | int _fiscanf_r(struct _reent *<[ptr]>, FILE *<[fd]>, |
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44 | const char *<[format]>, ...); |
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45 | int _siscanf_r(struct _reent *<[ptr]>, const char *<[str]>, |
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46 | const char *<[format]>, ...); |
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47 | |
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48 | DESCRIPTION |
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49 | <<iscanf>>, <<fiscanf>>, and <<siscanf>> are the same as |
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50 | <<scanf>>, <<fscanf>>, and <<sscanf>> respectively, only that |
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51 | they restrict the available formats to non-floating-point |
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52 | format specifiers. |
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53 | |
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54 | The routines <<_iscanf_r>>, <<_fiscanf_r>>, and <<_siscanf_r>> are reentrant |
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55 | versions of <<iscanf>>, <<fiscanf>>, and <<siscanf>> that take an additional |
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56 | first argument pointing to a reentrancy structure. |
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57 | |
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58 | RETURNS |
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59 | <<iscanf>> returns the number of input fields successfully |
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60 | scanned, converted and stored; the return value does |
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61 | not include scanned fields which were not stored. |
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62 | |
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63 | If <<iscanf>> attempts to read at end-of-file, the return |
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64 | value is <<EOF>>. |
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65 | |
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66 | If no fields were stored, the return value is <<0>>. |
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67 | |
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68 | PORTABILITY |
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69 | <<iscanf>>, <<fiscanf>>, and <<siscanf>> are newlib extensions. |
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70 | |
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71 | Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, |
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72 | <<lseek>>, <<read>>, <<sbrk>>, <<write>>. |
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73 | */ |
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74 | |
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75 | #include <_ansi.h> |
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76 | #include <reent.h> |
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77 | #include <stdio.h> |
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78 | #include <string.h> |
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79 | #include <stdarg.h> |
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80 | #include "local.h" |
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81 | |
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82 | #ifndef _REENT_ONLY |
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83 | |
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84 | int |
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85 | siscanf (const char *str, |
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86 | const char *fmt, ...) |
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87 | { |
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88 | int ret; |
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89 | va_list ap; |
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90 | FILE f; |
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91 | |
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92 | f._flags = __SRD | __SSTR; |
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93 | f._bf._base = f._p = (unsigned char *) str; |
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94 | f._bf._size = f._r = strlen (str); |
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95 | f._read = __seofread; |
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96 | f._ub._base = NULL; |
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97 | f._lb._base = NULL; |
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98 | f._file = -1; /* No file. */ |
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99 | va_start (ap, fmt); |
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100 | ret = __ssvfiscanf_r (_REENT, &f, fmt, ap); |
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101 | va_end (ap); |
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102 | return ret; |
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103 | } |
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104 | |
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105 | #endif /* !_REENT_ONLY */ |
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106 | |
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107 | int |
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108 | _siscanf_r (struct _reent *ptr, |
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109 | const char *str, |
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110 | const char *fmt, ...) |
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111 | { |
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112 | int ret; |
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113 | va_list ap; |
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114 | FILE f; |
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115 | |
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116 | f._flags = __SRD | __SSTR; |
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117 | f._bf._base = f._p = (unsigned char *) str; |
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118 | f._bf._size = f._r = strlen (str); |
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119 | f._read = __seofread; |
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120 | f._ub._base = NULL; |
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121 | f._lb._base = NULL; |
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122 | f._file = -1; /* No file. */ |
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123 | va_start (ap, fmt); |
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124 | ret = __ssvfiscanf_r (ptr, &f, fmt, ap); |
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125 | va_end (ap); |
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126 | return ret; |
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127 | } |
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