Mercurial > cpython-lru_cache-weakref

annotate Python/getopt.c @ 33714:635dd8a9ebd9 legacy-trunk

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Revert rev 2.35. It was based on erroneous reasoning -- the current thread's id can't get duplicated, because (of course!) the current thread is still running. The code should work either way, but reverting the gratuitous change should make backporting easier, and gets the bad reasoning out of 2.35's new comments.
author Tim Peters <tim.peters@gmail.com>
date Sun, 10 Oct 2004 05:30:40 +0000
parents a826a46bae54
children 2f3f2e32dfd9
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1 /*---------------------------------------------------------------------------*
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2 * <RCS keywords>
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3 *
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4 * C++ Library
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5 *
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6 * Copyright 1992-1994, David Gottner
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7 *
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8 * All Rights Reserved
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9 *
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10 * Permission to use, copy, modify, and distribute this software and its
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11 * documentation for any purpose and without fee is hereby granted,
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12 * provided that the above copyright notice, this permission notice and
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13 * the following disclaimer notice appear unmodified in all copies.
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14 *
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15 * I DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
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16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL I
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17 * BE LIABLE FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
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18 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER
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19 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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20 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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21 *
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22 * Nevertheless, I would like to know about bugs in this library or
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23 * suggestions for improvment. Send bug reports and feedback to
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24 * davegottner@delphi.com.
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25 *---------------------------------------------------------------------------*/
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26
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27 #include <stdio.h>
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28 #include <string.h>
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29
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30 int _PyOS_opterr = 1; /* generate error messages */
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31 int _PyOS_optind = 1; /* index into argv array */
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32 char *_PyOS_optarg = NULL; /* optional argument */
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33
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34 int _PyOS_GetOpt(int argc, char **argv, char *optstring)
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35 {
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36 static char *opt_ptr = "";
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37 char *ptr;
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38 int option;
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39
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40 if (*opt_ptr == '\0') {
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41
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42 if (_PyOS_optind >= argc || argv[_PyOS_optind][0] != '-' ||
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43 argv[_PyOS_optind][1] == '\0' /* lone dash */ )
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44 return -1;
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45
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46 else if (strcmp(argv[_PyOS_optind], "--") == 0) {
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47 ++_PyOS_optind;
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48 return -1;
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49 }
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50
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51 opt_ptr = &argv[_PyOS_optind++][1];
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52 }
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53
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54 if ( (option = *opt_ptr++) == '\0')
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55 return -1;
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56
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57 if ((ptr = strchr(optstring, option)) == NULL) {
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58 if (_PyOS_opterr)
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59 fprintf(stderr, "Unknown option: -%c\n", option);
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60
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61 return '?';
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62 }
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63
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64 if (*(ptr + 1) == ':') {
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65 if (*opt_ptr != '\0') {
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66 _PyOS_optarg = opt_ptr;
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67 opt_ptr = "";
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68 }
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69
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70 else {
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71 if (_PyOS_optind >= argc) {
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72 if (_PyOS_opterr)
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73 fprintf(stderr,
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74 "Argument expected for the -%c option\n", option);
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75 return '?';
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76 }
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77
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78 _PyOS_optarg = argv[_PyOS_optind++];
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79 }
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80 }
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81
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82 return option;
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83 }