1 | /* |
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2 | * Copyright (c) 1987 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, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | */ |
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33 | |
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34 | #ifndef lint |
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35 | static char sccsid[] = "@(#)yacc.c 5.6 (Berkeley) 2/26/91"; |
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36 | #endif /* not lint */ |
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37 | |
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38 | #include <stdio.h> |
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39 | #include <string.h> |
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40 | #include "ctags.h" |
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41 | |
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42 | /* |
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43 | * y_entries: |
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44 | * find the yacc tags and put them in. |
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45 | */ |
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46 | y_entries() |
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47 | { |
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48 | register int c; |
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49 | register char *sp; |
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50 | register bool in_rule; |
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51 | char tok[MAXTOKEN]; |
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52 | |
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53 | while (GETC(!=,EOF)) |
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54 | switch ((char)c) { |
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55 | case '\n': |
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56 | SETLINE; |
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57 | /* FALLTHROUGH */ |
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58 | case ' ': |
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59 | case '\f': |
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60 | case '\r': |
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61 | case '\t': |
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62 | break; |
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63 | case '{': |
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64 | if (skip_key((int)'}')) |
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65 | in_rule = NO; |
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66 | break; |
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67 | case '\'': |
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68 | case '"': |
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69 | if (skip_key(c)) |
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70 | in_rule = NO; |
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71 | break; |
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72 | case '%': |
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73 | if (GETC(==,'%')) |
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74 | return; |
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75 | (void)ungetc(c,inf); |
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76 | break; |
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77 | case '/': |
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78 | if (GETC(==,'*')) |
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79 | skip_comment(); |
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80 | else |
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81 | (void)ungetc(c,inf); |
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82 | break; |
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83 | case '|': |
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84 | case ';': |
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85 | in_rule = NO; |
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86 | break; |
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87 | default: |
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88 | if (in_rule || !isalpha(c) && c != (int)'.' |
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89 | && c != (int)'_') |
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90 | break; |
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91 | sp = tok; |
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92 | *sp++ = c; |
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93 | while (GETC(!=,EOF) && (intoken(c) || c == (int)'.')) |
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94 | *sp++ = c; |
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95 | *sp = EOS; |
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96 | getline(); /* may change before ':' */ |
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97 | while (iswhite(c)) { |
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98 | if (c == (int)'\n') |
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99 | SETLINE; |
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100 | if (GETC(==,EOF)) |
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101 | return; |
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102 | } |
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103 | if (c == (int)':') { |
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104 | pfnote(tok,lineno); |
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105 | in_rule = YES; |
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106 | } |
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107 | else |
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108 | (void)ungetc(c,inf); |
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109 | } |
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110 | } |
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111 | |
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112 | /* |
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113 | * toss_yysec -- |
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114 | * throw away lines up to the next "\n%%\n" |
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115 | */ |
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116 | toss_yysec() |
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117 | { |
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118 | register int c, /* read character */ |
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119 | state; |
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120 | |
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121 | /* |
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122 | * state == 0 : waiting |
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123 | * state == 1 : received a newline |
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124 | * state == 2 : received first % |
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125 | * state == 3 : recieved second % |
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126 | */ |
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127 | lineftell = ftell(inf); |
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128 | for (state = 0;GETC(!=,EOF);) |
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129 | switch ((char)c) { |
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130 | case '\n': |
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131 | ++lineno; |
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132 | lineftell = ftell(inf); |
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133 | if (state == 3) /* done! */ |
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134 | return; |
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135 | state = 1; /* start over */ |
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136 | break; |
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137 | case '%': |
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138 | if (state) /* if 1 or 2 */ |
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139 | ++state; /* goto 3 */ |
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140 | break; |
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141 | default: |
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142 | state = 0; /* reset */ |
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143 | } |
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144 | } |
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