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 | <<putchar>>---write a character (macro) |
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21 | |
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22 | INDEX |
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23 | putchar |
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24 | INDEX |
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25 | _putchar_r |
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26 | |
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27 | SYNOPSIS |
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28 | #include <stdio.h> |
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29 | int putchar(int <[ch]>); |
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30 | |
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31 | int _putchar_r(struct _reent *<[reent]>, int <[ch]>); |
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32 | |
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33 | DESCRIPTION |
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34 | <<putchar>> is a macro, defined in <<stdio.h>>. <<putchar>> |
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35 | writes its argument to the standard output stream, |
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36 | after converting it from an <<int>> to an <<unsigned char>>. |
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37 | |
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38 | The alternate function <<_putchar_r>> is a reentrant version. The |
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39 | extra argument <[reent]> is a pointer to a reentrancy structure. |
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40 | |
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41 | RETURNS |
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42 | If successful, <<putchar>> returns its argument <[ch]>. If an error |
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43 | intervenes, the result is <<EOF>>. You can use `<<ferror(stdin)>>' to |
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44 | query for errors. |
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45 | |
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46 | PORTABILITY |
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47 | ANSI C requires <<putchar>>; it suggests, but does not require, that |
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48 | <<putchar>> be implemented as a macro. |
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49 | |
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50 | Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, |
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51 | <<lseek>>, <<read>>, <<sbrk>>, <<write>>. |
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52 | */ |
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53 | |
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54 | #if defined(LIBC_SCCS) && !defined(lint) |
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55 | static char sccsid[] = "%W% (Berkeley) %G%"; |
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56 | #endif /* LIBC_SCCS and not lint */ |
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57 | |
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58 | /* |
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59 | * A subroutine version of the macro putchar. |
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60 | */ |
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61 | |
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62 | #include <_ansi.h> |
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63 | #include <reent.h> |
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64 | #include <stdio.h> |
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65 | #include "local.h" |
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66 | |
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67 | #undef putchar |
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68 | |
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69 | int |
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70 | _putchar_r (struct _reent *ptr, |
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71 | int c) |
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72 | { |
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73 | _REENT_SMALL_CHECK_INIT (ptr); |
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74 | return _putc_r (ptr, c, _stdout_r (ptr)); |
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75 | } |
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76 | |
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77 | #ifndef _REENT_ONLY |
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78 | |
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79 | int |
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80 | putchar (int c) |
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81 | { |
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82 | struct _reent *reent = _REENT; |
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83 | |
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84 | _REENT_SMALL_CHECK_INIT (reent); |
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85 | return _putc_r (reent, c, _stdout_r (reent)); |
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86 | } |
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87 | |
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88 | #endif |
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