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 | <<fputs>>, <<fputs_unlocked>>---write a character string in a file or stream |
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21 | |
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22 | INDEX |
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23 | fputs |
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24 | INDEX |
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25 | fputs_unlocked |
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26 | INDEX |
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27 | _fputs_r |
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28 | INDEX |
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29 | _fputs_unlocked_r |
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30 | |
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31 | SYNOPSIS |
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32 | #include <stdio.h> |
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33 | int fputs(const char *restrict <[s]>, FILE *restrict <[fp]>); |
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34 | |
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35 | #define _GNU_SOURCE |
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36 | #include <stdio.h> |
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37 | int fputs_unlocked(const char *restrict <[s]>, FILE *restrict <[fp]>); |
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38 | |
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39 | #include <stdio.h> |
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40 | int _fputs_r(struct _reent *<[ptr]>, const char *restrict <[s]>, FILE *restrict <[fp]>); |
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41 | |
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42 | #include <stdio.h> |
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43 | int _fputs_unlocked_r(struct _reent *<[ptr]>, const char *restrict <[s]>, FILE *restrict <[fp]>); |
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44 | |
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45 | DESCRIPTION |
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46 | <<fputs>> writes the string at <[s]> (but without the trailing null) |
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47 | to the file or stream identified by <[fp]>. |
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48 | |
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49 | <<fputs_unlocked>> is a non-thread-safe version of <<fputs>>. |
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50 | <<fputs_unlocked>> may only safely be used within a scope |
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51 | protected by flockfile() (or ftrylockfile()) and funlockfile(). This |
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52 | function may safely be used in a multi-threaded program if and only |
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53 | if they are called while the invoking thread owns the (FILE *) |
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54 | object, as is the case after a successful call to the flockfile() or |
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55 | ftrylockfile() functions. If threads are disabled, then |
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56 | <<fputs_unlocked>> is equivalent to <<fputs>>. |
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57 | |
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58 | <<_fputs_r>> and <<_fputs_unlocked_r>> are simply reentrant versions of the |
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59 | above that take an additional reentrant struct pointer argument: <[ptr]>. |
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60 | |
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61 | RETURNS |
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62 | If successful, the result is <<0>>; otherwise, the result is <<EOF>>. |
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63 | |
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64 | PORTABILITY |
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65 | ANSI C requires <<fputs>>, but does not specify that the result on |
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66 | success must be <<0>>; any non-negative value is permitted. |
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67 | |
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68 | <<fputs_unlocked>> is a GNU extension. |
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69 | |
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70 | Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, |
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71 | <<lseek>>, <<read>>, <<sbrk>>, <<write>>. |
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72 | */ |
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73 | |
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74 | #include <_ansi.h> |
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75 | #include <stdio.h> |
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76 | #include <string.h> |
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77 | #include "fvwrite.h" |
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78 | #include "local.h" |
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79 | |
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80 | #ifdef __IMPL_UNLOCKED__ |
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81 | #define _fputs_r _fputs_unlocked_r |
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82 | #define fputs fputs_unlocked |
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83 | #endif |
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84 | |
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85 | /* |
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86 | * Write the given string to the given file. |
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87 | */ |
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88 | int |
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89 | _fputs_r (struct _reent * ptr, |
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90 | char const *__restrict s, |
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91 | FILE *__restrict fp) |
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92 | { |
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93 | #ifdef _FVWRITE_IN_STREAMIO |
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94 | int result; |
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95 | struct __suio uio; |
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96 | struct __siov iov; |
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97 | |
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98 | iov.iov_base = s; |
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99 | iov.iov_len = uio.uio_resid = strlen (s); |
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100 | uio.uio_iov = &iov; |
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101 | uio.uio_iovcnt = 1; |
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102 | |
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103 | CHECK_INIT(ptr, fp); |
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104 | |
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105 | _newlib_flockfile_start (fp); |
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106 | ORIENT (fp, -1); |
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107 | result = __sfvwrite_r (ptr, fp, &uio); |
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108 | _newlib_flockfile_end (fp); |
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109 | return result; |
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110 | #else |
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111 | const char *p = s; |
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112 | |
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113 | CHECK_INIT(ptr, fp); |
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114 | |
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115 | _newlib_flockfile_start (fp); |
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116 | ORIENT (fp, -1); |
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117 | /* Make sure we can write. */ |
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118 | if (cantwrite (ptr, fp)) |
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119 | goto error; |
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120 | |
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121 | while (*p) |
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122 | { |
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123 | if (__sputc_r (ptr, *p++, fp) == EOF) |
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124 | goto error; |
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125 | } |
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126 | _newlib_flockfile_exit (fp); |
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127 | return 0; |
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128 | |
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129 | error: |
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130 | _newlib_flockfile_end (fp); |
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131 | return EOF; |
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132 | #endif |
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133 | } |
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134 | |
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135 | #ifndef _REENT_ONLY |
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136 | int |
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137 | fputs (char const *__restrict s, |
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138 | FILE *__restrict fp) |
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139 | { |
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140 | return _fputs_r (_REENT, s, fp); |
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141 | } |
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142 | #endif /* !_REENT_ONLY */ |
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