Mercurial > cpython-lru_cache-weakref

annotate Modules/parsermodule.c @ 2602:bee2aed416d6 legacy-trunk

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New documentation on the CD module.
author Sjoerd Mullender <sjoerd@acm.org>
date Tue, 28 Mar 1995 11:56:52 +0000
parents 448435bfeadc
children 8f5ab1a6c914
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1 /***********************************************************
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172ba04a5191 Added 1995 to copyright message.
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI not be used in advertising or publicity pertaining to
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13 distribution of the software without specific, written prior permission.
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15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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23 ******************************************************************/
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24
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25 /* Raw interface to the parser. */
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26
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27 #include "allobjects.h"
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28 #include "node.h"
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29 #include "token.h"
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30 #include "pythonrun.h"
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31 #include "graminit.h"
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32 #include "errcode.h"
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33
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34 static object *
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35 node2tuple(n)
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36 node *n;
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37 {
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38 if (n == NULL) {
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39 INCREF(None);
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40 return None;
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41 }
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42 if (ISNONTERMINAL(TYPE(n))) {
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43 int i;
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44 object *v, *w;
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45 v = newtupleobject(1 + NCH(n));
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46 if (v == NULL)
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47 return v;
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48 w = newintobject(TYPE(n));
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49 if (w == NULL) {
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50 DECREF(v);
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51 return NULL;
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52 }
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53 settupleitem(v, 0, w);
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54 for (i = 0; i < NCH(n); i++) {
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55 w = node2tuple(CHILD(n, i));
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56 if (w == NULL) {
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57 DECREF(v);
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58 return NULL;
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59 }
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60 settupleitem(v, i+1, w);
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61 }
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62 return v;
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63 }
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64 else if (ISTERMINAL(TYPE(n))) {
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65 return mkvalue("(is)", TYPE(n), STR(n));
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66 }
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67 else {
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68 err_setstr(SystemError, "unrecognized parse tree node type");
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69 return NULL;
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70 }
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71 }
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72
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73 static object *
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74 parser_parsefile(self, args)
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75 object *self;
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76 object *args;
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77 {
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78 char *filename;
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79 FILE *fp;
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80 node *n = NULL;
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81 object *res;
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82 if (!getargs(args, "s", &filename))
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83 return NULL;
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84 fp = fopen(filename, "r");
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85 if (fp == NULL) {
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86 err_errno(IOError);
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87 return NULL;
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88 }
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89 n = parse_file(fp, filename, file_input);
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90 fclose(fp);
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91 if (n == NULL)
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92 return NULL;
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93 res = node2tuple(n);
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94 freetree(n);
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95 return res;
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96 }
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97
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98 static struct methodlist parser_methods[] = {
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99 {"parsefile", parser_parsefile},
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100 {0, 0} /* Sentinel */
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101 };
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102
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103 void
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104 initparser()
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105 {
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106 initmodule("parser", parser_methods);
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107 }