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 | <<getw>>---read a word (int) |
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21 | |
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22 | INDEX |
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23 | getw |
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24 | |
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25 | SYNOPSIS |
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26 | #include <stdio.h> |
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27 | int getw(FILE *<[fp]>); |
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28 | |
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29 | DESCRIPTION |
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30 | <<getw>> is a function, defined in <<stdio.h>>. You can use <<getw>> |
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31 | to get the next word from the file or stream identified by <[fp]>. As |
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32 | a side effect, <<getw>> advances the file's current position |
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33 | indicator. |
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34 | |
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35 | RETURNS |
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36 | The next word (read as an <<int>>), unless there is no more |
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37 | data or the host system reports a read error; in either of these |
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38 | situations, <<getw>> returns <<EOF>>. Since <<EOF>> is a valid |
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39 | <<int>>, you must use <<ferror>> or <<feof>> to distinguish these |
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40 | situations. |
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41 | |
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42 | PORTABILITY |
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43 | <<getw>> is a remnant of K&R C; it is not part of any ISO C Standard. |
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44 | <<fread>> should be used instead. In fact, this implementation of |
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45 | <<getw>> is based upon <<fread>>. |
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46 | |
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47 | Supporting OS subroutines required: <<fread>>. */ |
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48 | |
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49 | #if defined(LIBC_SCCS) && !defined(lint) |
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50 | static char sccsid[] = "%W% (Berkeley) %G%"; |
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51 | #endif /* LIBC_SCCS and not lint */ |
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52 | |
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53 | #include <_ansi.h> |
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54 | #include <stdio.h> |
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55 | |
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56 | int |
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57 | getw (register FILE *fp) |
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58 | { |
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59 | int result; |
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60 | if (fread ((char*)&result, sizeof (result), 1, fp) != 1) |
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61 | return EOF; |
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62 | return result; |
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63 | } |
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