1 | /* $RCSfile: consarg.c,v $$Revision: 1.1.1.1 $$Date: 1996-10-02 06:39:57 $ |
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2 | * |
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3 | * Copyright (c) 1991, Larry Wall |
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4 | * |
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5 | * You may distribute under the terms of either the GNU General Public |
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6 | * License or the Artistic License, as specified in the README file. |
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7 | * |
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8 | * $Log: not supported by cvs2svn $ |
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9 | * Revision 4.0.1.4 92/06/08 12:26:27 lwall |
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10 | * patch20: new warning for use of x with non-numeric right operand |
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11 | * patch20: modulus with highest bit in left operand set didn't always work |
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12 | * patch20: illegal lvalue message could be followed by core dump |
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13 | * patch20: deleted some minor memory leaks |
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14 | * |
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15 | * Revision 4.0.1.3 91/11/05 16:21:16 lwall |
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16 | * patch11: random cleanup |
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17 | * patch11: added eval {} |
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18 | * patch11: added sort {} LIST |
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19 | * patch11: "foo" x -1 dumped core |
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20 | * patch11: substr() and vec() weren't allowed in an lvalue list |
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21 | * |
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22 | * Revision 4.0.1.2 91/06/07 10:33:12 lwall |
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23 | * patch4: new copyright notice |
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24 | * patch4: length($`), length($&), length($') now optimized to avoid string copy |
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25 | * |
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26 | * Revision 4.0.1.1 91/04/11 17:38:34 lwall |
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27 | * patch1: fixed "Bad free" error |
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28 | * |
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29 | * Revision 4.0 91/03/20 01:06:15 lwall |
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30 | * 4.0 baseline. |
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31 | * |
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32 | */ |
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33 | |
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34 | #include "EXTERN.h" |
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35 | #include "perl.h" |
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36 | static int nothing_in_common(); |
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37 | static int arg_common(); |
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38 | static int spat_common(); |
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39 | |
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40 | ARG * |
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41 | make_split(stab,arg,limarg) |
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42 | register STAB *stab; |
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43 | register ARG *arg; |
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44 | ARG *limarg; |
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45 | { |
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46 | register SPAT *spat; |
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47 | |
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48 | if (arg->arg_type != O_MATCH) { |
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49 | Newz(201,spat,1,SPAT); |
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50 | spat->spat_next = curstash->tbl_spatroot; /* link into spat list */ |
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51 | curstash->tbl_spatroot = spat; |
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52 | |
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53 | spat->spat_runtime = arg; |
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54 | arg = make_match(O_MATCH,stab2arg(A_STAB,defstab),spat); |
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55 | } |
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56 | Renew(arg,4,ARG); |
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57 | arg->arg_len = 3; |
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58 | if (limarg) { |
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59 | if (limarg->arg_type == O_ITEM) { |
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60 | Copy(limarg+1,arg+3,1,ARG); |
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61 | limarg[1].arg_type = A_NULL; |
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62 | arg_free(limarg); |
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63 | } |
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64 | else { |
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65 | arg[3].arg_flags = 0; |
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66 | arg[3].arg_len = 0; |
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67 | arg[3].arg_type = A_EXPR; |
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68 | arg[3].arg_ptr.arg_arg = limarg; |
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69 | } |
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70 | } |
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71 | else { |
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72 | arg[3].arg_flags = 0; |
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73 | arg[3].arg_len = 0; |
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74 | arg[3].arg_type = A_NULL; |
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75 | arg[3].arg_ptr.arg_arg = Nullarg; |
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76 | } |
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77 | arg->arg_type = O_SPLIT; |
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78 | spat = arg[2].arg_ptr.arg_spat; |
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79 | spat->spat_repl = stab2arg(A_STAB,aadd(stab)); |
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80 | if (spat->spat_short) { /* exact match can bypass regexec() */ |
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81 | if (!((spat->spat_flags & SPAT_SCANFIRST) && |
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82 | (spat->spat_flags & SPAT_ALL) )) { |
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83 | str_free(spat->spat_short); |
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84 | spat->spat_short = Nullstr; |
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85 | } |
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86 | } |
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87 | return arg; |
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88 | } |
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89 | |
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90 | ARG * |
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91 | mod_match(type,left,pat) |
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92 | register ARG *left; |
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93 | register ARG *pat; |
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94 | { |
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95 | |
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96 | register SPAT *spat; |
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97 | register ARG *newarg; |
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98 | |
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99 | if (!pat) |
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100 | return Nullarg; |
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101 | |
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102 | if ((pat->arg_type == O_MATCH || |
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103 | pat->arg_type == O_SUBST || |
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104 | pat->arg_type == O_TRANS || |
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105 | pat->arg_type == O_SPLIT |
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106 | ) && |
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107 | pat[1].arg_ptr.arg_stab == defstab ) { |
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108 | switch (pat->arg_type) { |
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109 | case O_MATCH: |
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110 | newarg = make_op(type == O_MATCH ? O_MATCH : O_NMATCH, |
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111 | pat->arg_len, |
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112 | left,Nullarg,Nullarg); |
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113 | break; |
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114 | case O_SUBST: |
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115 | newarg = l(make_op(type == O_MATCH ? O_SUBST : O_NSUBST, |
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116 | pat->arg_len, |
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117 | left,Nullarg,Nullarg)); |
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118 | break; |
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119 | case O_TRANS: |
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120 | newarg = l(make_op(type == O_MATCH ? O_TRANS : O_NTRANS, |
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121 | pat->arg_len, |
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122 | left,Nullarg,Nullarg)); |
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123 | break; |
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124 | case O_SPLIT: |
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125 | newarg = make_op(type == O_MATCH ? O_SPLIT : O_SPLIT, |
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126 | pat->arg_len, |
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127 | left,Nullarg,Nullarg); |
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128 | break; |
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129 | } |
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130 | if (pat->arg_len >= 2) { |
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131 | newarg[2].arg_type = pat[2].arg_type; |
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132 | newarg[2].arg_ptr = pat[2].arg_ptr; |
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133 | newarg[2].arg_len = pat[2].arg_len; |
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134 | newarg[2].arg_flags = pat[2].arg_flags; |
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135 | if (pat->arg_len >= 3) { |
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136 | newarg[3].arg_type = pat[3].arg_type; |
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137 | newarg[3].arg_ptr = pat[3].arg_ptr; |
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138 | newarg[3].arg_len = pat[3].arg_len; |
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139 | newarg[3].arg_flags = pat[3].arg_flags; |
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140 | } |
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141 | } |
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142 | free_arg(pat); |
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143 | } |
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144 | else { |
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145 | Newz(202,spat,1,SPAT); |
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146 | spat->spat_next = curstash->tbl_spatroot; /* link into spat list */ |
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147 | curstash->tbl_spatroot = spat; |
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148 | |
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149 | spat->spat_runtime = pat; |
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150 | newarg = make_op(type,2,left,Nullarg,Nullarg); |
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151 | newarg[2].arg_type = A_SPAT | A_DONT; |
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152 | newarg[2].arg_ptr.arg_spat = spat; |
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153 | } |
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154 | |
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155 | return newarg; |
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156 | } |
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157 | |
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158 | ARG * |
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159 | make_op(type,newlen,arg1,arg2,arg3) |
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160 | int type; |
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161 | int newlen; |
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162 | ARG *arg1; |
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163 | ARG *arg2; |
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164 | ARG *arg3; |
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165 | { |
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166 | register ARG *arg; |
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167 | register ARG *chld; |
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168 | register unsigned doarg; |
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169 | register int i; |
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170 | extern ARG *arg4; /* should be normal arguments, really */ |
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171 | extern ARG *arg5; |
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172 | |
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173 | arg = op_new(newlen); |
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174 | arg->arg_type = type; |
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175 | /*SUPPRESS 560*/ |
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176 | if (chld = arg1) { |
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177 | if (chld->arg_type == O_ITEM && |
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178 | (hoistable[ i = (chld[1].arg_type&A_MASK)] || i == A_LVAL || |
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179 | (i == A_LEXPR && |
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180 | (chld[1].arg_ptr.arg_arg->arg_type == O_LIST || |
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181 | chld[1].arg_ptr.arg_arg->arg_type == O_ARRAY || |
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182 | chld[1].arg_ptr.arg_arg->arg_type == O_HASH )))) |
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183 | { |
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184 | arg[1].arg_type = chld[1].arg_type; |
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185 | arg[1].arg_ptr = chld[1].arg_ptr; |
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186 | arg[1].arg_flags |= chld[1].arg_flags; |
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187 | arg[1].arg_len = chld[1].arg_len; |
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188 | free_arg(chld); |
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189 | } |
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190 | else { |
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191 | arg[1].arg_type = A_EXPR; |
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192 | arg[1].arg_ptr.arg_arg = chld; |
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193 | } |
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194 | } |
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195 | /*SUPPRESS 560*/ |
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196 | if (chld = arg2) { |
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197 | if (chld->arg_type == O_ITEM && |
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198 | (hoistable[chld[1].arg_type&A_MASK] || |
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199 | (type == O_ASSIGN && |
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200 | ((chld[1].arg_type == A_READ && !(arg[1].arg_type & A_DONT)) |
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201 | || |
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202 | (chld[1].arg_type == A_INDREAD && !(arg[1].arg_type & A_DONT)) |
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203 | || |
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204 | (chld[1].arg_type == A_GLOB && !(arg[1].arg_type & A_DONT)) |
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205 | ) ) ) ) { |
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206 | arg[2].arg_type = chld[1].arg_type; |
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207 | arg[2].arg_ptr = chld[1].arg_ptr; |
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208 | arg[2].arg_len = chld[1].arg_len; |
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209 | free_arg(chld); |
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210 | } |
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211 | else { |
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212 | arg[2].arg_type = A_EXPR; |
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213 | arg[2].arg_ptr.arg_arg = chld; |
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214 | } |
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215 | } |
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216 | /*SUPPRESS 560*/ |
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217 | if (chld = arg3) { |
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218 | if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type&A_MASK]) { |
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219 | arg[3].arg_type = chld[1].arg_type; |
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220 | arg[3].arg_ptr = chld[1].arg_ptr; |
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221 | arg[3].arg_len = chld[1].arg_len; |
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222 | free_arg(chld); |
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223 | } |
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224 | else { |
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225 | arg[3].arg_type = A_EXPR; |
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226 | arg[3].arg_ptr.arg_arg = chld; |
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227 | } |
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228 | } |
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229 | if (newlen >= 4 && (chld = arg4)) { |
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230 | if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type&A_MASK]) { |
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231 | arg[4].arg_type = chld[1].arg_type; |
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232 | arg[4].arg_ptr = chld[1].arg_ptr; |
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233 | arg[4].arg_len = chld[1].arg_len; |
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234 | free_arg(chld); |
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235 | } |
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236 | else { |
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237 | arg[4].arg_type = A_EXPR; |
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238 | arg[4].arg_ptr.arg_arg = chld; |
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239 | } |
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240 | } |
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241 | if (newlen >= 5 && (chld = arg5)) { |
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242 | if (chld->arg_type == O_ITEM && hoistable[chld[1].arg_type&A_MASK]) { |
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243 | arg[5].arg_type = chld[1].arg_type; |
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244 | arg[5].arg_ptr = chld[1].arg_ptr; |
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245 | arg[5].arg_len = chld[1].arg_len; |
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246 | free_arg(chld); |
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247 | } |
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248 | else { |
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249 | arg[5].arg_type = A_EXPR; |
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250 | arg[5].arg_ptr.arg_arg = chld; |
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251 | } |
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252 | } |
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253 | doarg = opargs[type]; |
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254 | for (i = 1; i <= newlen; ++i) { |
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255 | if (!(doarg & 1)) |
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256 | arg[i].arg_type |= A_DONT; |
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257 | if (doarg & 2) |
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258 | arg[i].arg_flags |= AF_ARYOK; |
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259 | doarg >>= 2; |
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260 | } |
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261 | #ifdef DEBUGGING |
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262 | if (debug & 16) { |
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263 | fprintf(stderr,"%lx <= make_op(%s",arg,opname[arg->arg_type]); |
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264 | if (arg1) |
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265 | fprintf(stderr,",%s=%lx", |
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266 | argname[arg[1].arg_type&A_MASK],arg[1].arg_ptr.arg_arg); |
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267 | if (arg2) |
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268 | fprintf(stderr,",%s=%lx", |
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269 | argname[arg[2].arg_type&A_MASK],arg[2].arg_ptr.arg_arg); |
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270 | if (arg3) |
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271 | fprintf(stderr,",%s=%lx", |
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272 | argname[arg[3].arg_type&A_MASK],arg[3].arg_ptr.arg_arg); |
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273 | if (newlen >= 4) |
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274 | fprintf(stderr,",%s=%lx", |
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275 | argname[arg[4].arg_type&A_MASK],arg[4].arg_ptr.arg_arg); |
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276 | if (newlen >= 5) |
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277 | fprintf(stderr,",%s=%lx", |
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278 | argname[arg[5].arg_type&A_MASK],arg[5].arg_ptr.arg_arg); |
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279 | fprintf(stderr,")\n"); |
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280 | } |
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281 | #endif |
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282 | arg = evalstatic(arg); /* see if we can consolidate anything */ |
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283 | return arg; |
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284 | } |
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285 | |
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286 | ARG * |
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287 | evalstatic(arg) |
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288 | register ARG *arg; |
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289 | { |
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290 | static STR *str = Nullstr; |
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291 | register STR *s1; |
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292 | register STR *s2; |
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293 | double value; /* must not be register */ |
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294 | register char *tmps; |
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295 | int i; |
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296 | unsigned long tmplong; |
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297 | long tmp2; |
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298 | double exp(), log(), sqrt(), modf(); |
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299 | char *crypt(); |
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300 | double sin(), cos(), atan2(), pow(); |
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301 | |
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302 | if (!arg || !arg->arg_len) |
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303 | return arg; |
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304 | |
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305 | if (!str) |
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306 | str = Str_new(20,0); |
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307 | |
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308 | if (arg[1].arg_type == A_SINGLE) |
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309 | s1 = arg[1].arg_ptr.arg_str; |
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310 | else |
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311 | s1 = Nullstr; |
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312 | if (arg->arg_len >= 2 && arg[2].arg_type == A_SINGLE) |
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313 | s2 = arg[2].arg_ptr.arg_str; |
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314 | else |
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315 | s2 = Nullstr; |
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316 | |
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317 | #define CHECK1 if (!s1) return arg |
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318 | #define CHECK2 if (!s2) return arg |
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319 | #define CHECK12 if (!s1 || !s2) return arg |
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320 | |
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321 | switch (arg->arg_type) { |
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322 | default: |
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323 | return arg; |
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324 | case O_SORT: |
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325 | if (arg[1].arg_type == A_CMD) |
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326 | arg[1].arg_type |= A_DONT; |
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327 | return arg; |
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328 | case O_EVAL: |
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329 | if (arg[1].arg_type == A_CMD) { |
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330 | arg->arg_type = O_TRY; |
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331 | arg[1].arg_type |= A_DONT; |
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332 | return arg; |
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333 | } |
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334 | CHECK1; |
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335 | arg->arg_type = O_EVALONCE; |
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336 | return arg; |
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337 | case O_AELEM: |
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338 | CHECK2; |
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339 | i = (int)str_gnum(s2); |
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340 | if (i < 32767 && i >= 0) { |
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341 | arg->arg_type = O_ITEM; |
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342 | arg->arg_len = 1; |
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343 | arg[1].arg_type = A_ARYSTAB; /* $abc[123] is hoistable now */ |
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344 | arg[1].arg_len = i; |
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345 | str_free(s2); |
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346 | Renew(arg, 2, ARG); |
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347 | } |
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348 | return arg; |
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349 | case O_CONCAT: |
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350 | CHECK12; |
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351 | str_sset(str,s1); |
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352 | str_scat(str,s2); |
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353 | break; |
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354 | case O_REPEAT: |
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355 | CHECK2; |
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356 | if (dowarn && !s2->str_nok && !looks_like_number(s2)) |
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357 | warn("Right operand of x is not numeric"); |
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358 | CHECK1; |
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359 | i = (int)str_gnum(s2); |
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360 | tmps = str_get(s1); |
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361 | str_nset(str,"",0); |
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362 | if (i > 0) { |
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363 | STR_GROW(str, i * s1->str_cur + 1); |
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364 | repeatcpy(str->str_ptr, tmps, s1->str_cur, i); |
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365 | str->str_cur = i * s1->str_cur; |
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366 | str->str_ptr[str->str_cur] = '\0'; |
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367 | } |
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368 | break; |
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369 | case O_MULTIPLY: |
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370 | CHECK12; |
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371 | value = str_gnum(s1); |
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372 | str_numset(str,value * str_gnum(s2)); |
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373 | break; |
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374 | case O_DIVIDE: |
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375 | CHECK12; |
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376 | value = str_gnum(s2); |
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377 | if (value == 0.0) |
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378 | yyerror("Illegal division by constant zero"); |
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379 | else |
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380 | #ifdef SLOPPYDIVIDE |
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381 | /* insure that 20./5. == 4. */ |
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382 | { |
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383 | double x; |
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384 | int k; |
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385 | x = str_gnum(s1); |
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386 | if ((double)(int)x == x && |
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387 | (double)(int)value == value && |
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388 | (k = (int)x/(int)value)*(int)value == (int)x) { |
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389 | value = k; |
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390 | } else { |
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391 | value = x/value; |
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392 | } |
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393 | str_numset(str,value); |
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394 | } |
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395 | #else |
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396 | str_numset(str,str_gnum(s1) / value); |
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397 | #endif |
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398 | break; |
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399 | case O_MODULO: |
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400 | CHECK12; |
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401 | tmplong = (unsigned long)str_gnum(s2); |
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402 | if (tmplong == 0L) { |
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403 | yyerror("Illegal modulus of constant zero"); |
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404 | return arg; |
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405 | } |
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406 | value = str_gnum(s1); |
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407 | #ifndef lint |
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408 | if (value >= 0.0) |
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409 | str_numset(str,(double)(((unsigned long)value) % tmplong)); |
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410 | else { |
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411 | tmp2 = (long)value; |
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412 | str_numset(str,(double)((tmplong-((-tmp2 - 1) % tmplong)) - 1)); |
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413 | } |
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414 | #else |
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415 | tmp2 = tmp2; |
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416 | #endif |
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417 | break; |
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418 | case O_ADD: |
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419 | CHECK12; |
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420 | value = str_gnum(s1); |
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421 | str_numset(str,value + str_gnum(s2)); |
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422 | break; |
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423 | case O_SUBTRACT: |
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424 | CHECK12; |
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425 | value = str_gnum(s1); |
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426 | str_numset(str,value - str_gnum(s2)); |
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427 | break; |
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428 | case O_LEFT_SHIFT: |
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429 | CHECK12; |
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430 | value = str_gnum(s1); |
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431 | i = (int)str_gnum(s2); |
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432 | #ifndef lint |
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433 | str_numset(str,(double)(((long)value) << i)); |
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434 | #endif |
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435 | break; |
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436 | case O_RIGHT_SHIFT: |
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437 | CHECK12; |
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438 | value = str_gnum(s1); |
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439 | i = (int)str_gnum(s2); |
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440 | #ifndef lint |
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441 | str_numset(str,(double)(((long)value) >> i)); |
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442 | #endif |
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443 | break; |
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444 | case O_LT: |
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445 | CHECK12; |
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446 | value = str_gnum(s1); |
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447 | str_numset(str,(value < str_gnum(s2)) ? 1.0 : 0.0); |
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448 | break; |
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449 | case O_GT: |
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450 | CHECK12; |
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451 | value = str_gnum(s1); |
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452 | str_numset(str,(value > str_gnum(s2)) ? 1.0 : 0.0); |
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453 | break; |
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454 | case O_LE: |
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455 | CHECK12; |
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456 | value = str_gnum(s1); |
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457 | str_numset(str,(value <= str_gnum(s2)) ? 1.0 : 0.0); |
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458 | break; |
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459 | case O_GE: |
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460 | CHECK12; |
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461 | value = str_gnum(s1); |
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462 | str_numset(str,(value >= str_gnum(s2)) ? 1.0 : 0.0); |
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463 | break; |
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464 | case O_EQ: |
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465 | CHECK12; |
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466 | if (dowarn) { |
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467 | if ((!s1->str_nok && !looks_like_number(s1)) || |
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468 | (!s2->str_nok && !looks_like_number(s2)) ) |
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469 | warn("Possible use of == on string value"); |
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470 | } |
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471 | value = str_gnum(s1); |
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472 | str_numset(str,(value == str_gnum(s2)) ? 1.0 : 0.0); |
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473 | break; |
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474 | case O_NE: |
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475 | CHECK12; |
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476 | value = str_gnum(s1); |
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477 | str_numset(str,(value != str_gnum(s2)) ? 1.0 : 0.0); |
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478 | break; |
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479 | case O_NCMP: |
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480 | CHECK12; |
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481 | value = str_gnum(s1); |
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482 | value -= str_gnum(s2); |
---|
483 | if (value > 0.0) |
---|
484 | value = 1.0; |
---|
485 | else if (value < 0.0) |
---|
486 | value = -1.0; |
---|
487 | str_numset(str,value); |
---|
488 | break; |
---|
489 | case O_BIT_AND: |
---|
490 | CHECK12; |
---|
491 | value = str_gnum(s1); |
---|
492 | #ifndef lint |
---|
493 | str_numset(str,(double)(U_L(value) & U_L(str_gnum(s2)))); |
---|
494 | #endif |
---|
495 | break; |
---|
496 | case O_XOR: |
---|
497 | CHECK12; |
---|
498 | value = str_gnum(s1); |
---|
499 | #ifndef lint |
---|
500 | str_numset(str,(double)(U_L(value) ^ U_L(str_gnum(s2)))); |
---|
501 | #endif |
---|
502 | break; |
---|
503 | case O_BIT_OR: |
---|
504 | CHECK12; |
---|
505 | value = str_gnum(s1); |
---|
506 | #ifndef lint |
---|
507 | str_numset(str,(double)(U_L(value) | U_L(str_gnum(s2)))); |
---|
508 | #endif |
---|
509 | break; |
---|
510 | case O_AND: |
---|
511 | CHECK12; |
---|
512 | if (str_true(s1)) |
---|
513 | str_sset(str,s2); |
---|
514 | else |
---|
515 | str_sset(str,s1); |
---|
516 | break; |
---|
517 | case O_OR: |
---|
518 | CHECK12; |
---|
519 | if (str_true(s1)) |
---|
520 | str_sset(str,s1); |
---|
521 | else |
---|
522 | str_sset(str,s2); |
---|
523 | break; |
---|
524 | case O_COND_EXPR: |
---|
525 | CHECK12; |
---|
526 | if ((arg[3].arg_type & A_MASK) != A_SINGLE) |
---|
527 | return arg; |
---|
528 | if (str_true(s1)) |
---|
529 | str_sset(str,s2); |
---|
530 | else |
---|
531 | str_sset(str,arg[3].arg_ptr.arg_str); |
---|
532 | str_free(arg[3].arg_ptr.arg_str); |
---|
533 | Renew(arg, 3, ARG); |
---|
534 | break; |
---|
535 | case O_NEGATE: |
---|
536 | CHECK1; |
---|
537 | str_numset(str,(double)(-str_gnum(s1))); |
---|
538 | break; |
---|
539 | case O_NOT: |
---|
540 | CHECK1; |
---|
541 | #ifdef NOTNOT |
---|
542 | { char xxx = str_true(s1); str_numset(str,(double)!xxx); } |
---|
543 | #else |
---|
544 | str_numset(str,(double)(!str_true(s1))); |
---|
545 | #endif |
---|
546 | break; |
---|
547 | case O_COMPLEMENT: |
---|
548 | CHECK1; |
---|
549 | #ifndef lint |
---|
550 | str_numset(str,(double)(~U_L(str_gnum(s1)))); |
---|
551 | #endif |
---|
552 | break; |
---|
553 | case O_SIN: |
---|
554 | CHECK1; |
---|
555 | str_numset(str,sin(str_gnum(s1))); |
---|
556 | break; |
---|
557 | case O_COS: |
---|
558 | CHECK1; |
---|
559 | str_numset(str,cos(str_gnum(s1))); |
---|
560 | break; |
---|
561 | case O_ATAN2: |
---|
562 | CHECK12; |
---|
563 | value = str_gnum(s1); |
---|
564 | str_numset(str,atan2(value, str_gnum(s2))); |
---|
565 | break; |
---|
566 | case O_POW: |
---|
567 | CHECK12; |
---|
568 | value = str_gnum(s1); |
---|
569 | str_numset(str,pow(value, str_gnum(s2))); |
---|
570 | break; |
---|
571 | case O_LENGTH: |
---|
572 | if (arg[1].arg_type == A_STAB) { |
---|
573 | arg->arg_type = O_ITEM; |
---|
574 | arg[1].arg_type = A_LENSTAB; |
---|
575 | return arg; |
---|
576 | } |
---|
577 | CHECK1; |
---|
578 | str_numset(str, (double)str_len(s1)); |
---|
579 | break; |
---|
580 | case O_SLT: |
---|
581 | CHECK12; |
---|
582 | str_numset(str,(double)(str_cmp(s1,s2) < 0)); |
---|
583 | break; |
---|
584 | case O_SGT: |
---|
585 | CHECK12; |
---|
586 | str_numset(str,(double)(str_cmp(s1,s2) > 0)); |
---|
587 | break; |
---|
588 | case O_SLE: |
---|
589 | CHECK12; |
---|
590 | str_numset(str,(double)(str_cmp(s1,s2) <= 0)); |
---|
591 | break; |
---|
592 | case O_SGE: |
---|
593 | CHECK12; |
---|
594 | str_numset(str,(double)(str_cmp(s1,s2) >= 0)); |
---|
595 | break; |
---|
596 | case O_SEQ: |
---|
597 | CHECK12; |
---|
598 | str_numset(str,(double)(str_eq(s1,s2))); |
---|
599 | break; |
---|
600 | case O_SNE: |
---|
601 | CHECK12; |
---|
602 | str_numset(str,(double)(!str_eq(s1,s2))); |
---|
603 | break; |
---|
604 | case O_SCMP: |
---|
605 | CHECK12; |
---|
606 | str_numset(str,(double)(str_cmp(s1,s2))); |
---|
607 | break; |
---|
608 | case O_CRYPT: |
---|
609 | CHECK12; |
---|
610 | #ifdef HAS_CRYPT |
---|
611 | tmps = str_get(s1); |
---|
612 | str_set(str,crypt(tmps,str_get(s2))); |
---|
613 | #else |
---|
614 | yyerror( |
---|
615 | "The crypt() function is unimplemented due to excessive paranoia."); |
---|
616 | #endif |
---|
617 | break; |
---|
618 | case O_EXP: |
---|
619 | CHECK1; |
---|
620 | str_numset(str,exp(str_gnum(s1))); |
---|
621 | break; |
---|
622 | case O_LOG: |
---|
623 | CHECK1; |
---|
624 | str_numset(str,log(str_gnum(s1))); |
---|
625 | break; |
---|
626 | case O_SQRT: |
---|
627 | CHECK1; |
---|
628 | str_numset(str,sqrt(str_gnum(s1))); |
---|
629 | break; |
---|
630 | case O_INT: |
---|
631 | CHECK1; |
---|
632 | value = str_gnum(s1); |
---|
633 | if (value >= 0.0) |
---|
634 | (void)modf(value,&value); |
---|
635 | else { |
---|
636 | (void)modf(-value,&value); |
---|
637 | value = -value; |
---|
638 | } |
---|
639 | str_numset(str,value); |
---|
640 | break; |
---|
641 | case O_ORD: |
---|
642 | CHECK1; |
---|
643 | #ifndef I286 |
---|
644 | str_numset(str,(double)(*str_get(s1))); |
---|
645 | #else |
---|
646 | { |
---|
647 | int zapc; |
---|
648 | char *zaps; |
---|
649 | |
---|
650 | zaps = str_get(s1); |
---|
651 | zapc = (int) *zaps; |
---|
652 | str_numset(str,(double)(zapc)); |
---|
653 | } |
---|
654 | #endif |
---|
655 | break; |
---|
656 | } |
---|
657 | arg->arg_type = O_ITEM; /* note arg1 type is already SINGLE */ |
---|
658 | str_free(s1); |
---|
659 | arg[1].arg_ptr.arg_str = str; |
---|
660 | if (s2) { |
---|
661 | str_free(s2); |
---|
662 | arg[2].arg_ptr.arg_str = Nullstr; |
---|
663 | arg[2].arg_type = A_NULL; |
---|
664 | } |
---|
665 | str = Nullstr; |
---|
666 | |
---|
667 | return arg; |
---|
668 | } |
---|
669 | |
---|
670 | ARG * |
---|
671 | l(arg) |
---|
672 | register ARG *arg; |
---|
673 | { |
---|
674 | register int i; |
---|
675 | register ARG *arg1; |
---|
676 | register ARG *arg2; |
---|
677 | SPAT *spat; |
---|
678 | int arghog = 0; |
---|
679 | |
---|
680 | i = arg[1].arg_type & A_MASK; |
---|
681 | |
---|
682 | arg->arg_flags |= AF_COMMON; /* assume something in common */ |
---|
683 | /* which forces us to copy things */ |
---|
684 | |
---|
685 | if (i == A_ARYLEN) { |
---|
686 | arg[1].arg_type = A_LARYLEN; |
---|
687 | return arg; |
---|
688 | } |
---|
689 | if (i == A_ARYSTAB) { |
---|
690 | arg[1].arg_type = A_LARYSTAB; |
---|
691 | return arg; |
---|
692 | } |
---|
693 | |
---|
694 | /* see if it's an array reference */ |
---|
695 | |
---|
696 | if (i == A_EXPR || i == A_LEXPR) { |
---|
697 | arg1 = arg[1].arg_ptr.arg_arg; |
---|
698 | |
---|
699 | if (arg1->arg_type == O_LIST || arg1->arg_type == O_ITEM) { |
---|
700 | /* assign to list */ |
---|
701 | if (arg->arg_len > 1) { |
---|
702 | dehoist(arg,2); |
---|
703 | arg2 = arg[2].arg_ptr.arg_arg; |
---|
704 | if (nothing_in_common(arg1,arg2)) |
---|
705 | arg->arg_flags &= ~AF_COMMON; |
---|
706 | if (arg->arg_type == O_ASSIGN) { |
---|
707 | if (arg1->arg_flags & AF_LOCAL) |
---|
708 | arg->arg_flags |= AF_LOCAL; |
---|
709 | arg[1].arg_flags |= AF_ARYOK; |
---|
710 | arg[2].arg_flags |= AF_ARYOK; |
---|
711 | } |
---|
712 | } |
---|
713 | else if (arg->arg_type != O_CHOP) |
---|
714 | arg->arg_type = O_ASSIGN; /* possible local(); */ |
---|
715 | for (i = arg1->arg_len; i >= 1; i--) { |
---|
716 | switch (arg1[i].arg_type) { |
---|
717 | case A_STAR: case A_LSTAR: |
---|
718 | arg1[i].arg_type = A_LSTAR; |
---|
719 | break; |
---|
720 | case A_STAB: case A_LVAL: |
---|
721 | arg1[i].arg_type = A_LVAL; |
---|
722 | break; |
---|
723 | case A_ARYLEN: case A_LARYLEN: |
---|
724 | arg1[i].arg_type = A_LARYLEN; |
---|
725 | break; |
---|
726 | case A_ARYSTAB: case A_LARYSTAB: |
---|
727 | arg1[i].arg_type = A_LARYSTAB; |
---|
728 | break; |
---|
729 | case A_EXPR: case A_LEXPR: |
---|
730 | arg1[i].arg_type = A_LEXPR; |
---|
731 | switch(arg1[i].arg_ptr.arg_arg->arg_type) { |
---|
732 | case O_ARRAY: case O_LARRAY: |
---|
733 | arg1[i].arg_ptr.arg_arg->arg_type = O_LARRAY; |
---|
734 | arghog = 1; |
---|
735 | break; |
---|
736 | case O_AELEM: case O_LAELEM: |
---|
737 | arg1[i].arg_ptr.arg_arg->arg_type = O_LAELEM; |
---|
738 | break; |
---|
739 | case O_HASH: case O_LHASH: |
---|
740 | arg1[i].arg_ptr.arg_arg->arg_type = O_LHASH; |
---|
741 | arghog = 1; |
---|
742 | break; |
---|
743 | case O_HELEM: case O_LHELEM: |
---|
744 | arg1[i].arg_ptr.arg_arg->arg_type = O_LHELEM; |
---|
745 | break; |
---|
746 | case O_ASLICE: case O_LASLICE: |
---|
747 | arg1[i].arg_ptr.arg_arg->arg_type = O_LASLICE; |
---|
748 | break; |
---|
749 | case O_HSLICE: case O_LHSLICE: |
---|
750 | arg1[i].arg_ptr.arg_arg->arg_type = O_LHSLICE; |
---|
751 | break; |
---|
752 | case O_SUBSTR: case O_VEC: |
---|
753 | (void)l(arg1[i].arg_ptr.arg_arg); |
---|
754 | Renewc(arg1[i].arg_ptr.arg_arg->arg_ptr.arg_str, 1, |
---|
755 | struct lstring, STR); |
---|
756 | /* grow string struct to hold an lstring struct */ |
---|
757 | break; |
---|
758 | default: |
---|
759 | goto ill_item; |
---|
760 | } |
---|
761 | break; |
---|
762 | default: |
---|
763 | ill_item: |
---|
764 | (void)sprintf(tokenbuf, "Illegal item (%s) as lvalue", |
---|
765 | argname[arg1[i].arg_type&A_MASK]); |
---|
766 | yyerror(tokenbuf); |
---|
767 | } |
---|
768 | } |
---|
769 | if (arg->arg_len > 1) { |
---|
770 | if (arg2->arg_type == O_SPLIT && !arg2[3].arg_type && !arghog) { |
---|
771 | arg2[3].arg_type = A_SINGLE; |
---|
772 | arg2[3].arg_ptr.arg_str = |
---|
773 | str_nmake((double)arg1->arg_len + 1); /* limit split len*/ |
---|
774 | } |
---|
775 | } |
---|
776 | } |
---|
777 | else if (arg1->arg_type == O_AELEM || arg1->arg_type == O_LAELEM) |
---|
778 | if (arg->arg_type == O_DEFINED) |
---|
779 | arg1->arg_type = O_AELEM; |
---|
780 | else |
---|
781 | arg1->arg_type = O_LAELEM; |
---|
782 | else if (arg1->arg_type == O_ARRAY || arg1->arg_type == O_LARRAY) { |
---|
783 | arg1->arg_type = O_LARRAY; |
---|
784 | if (arg->arg_len > 1) { |
---|
785 | dehoist(arg,2); |
---|
786 | arg2 = arg[2].arg_ptr.arg_arg; |
---|
787 | if (arg2->arg_type == O_SPLIT) { /* use split's builtin =?*/ |
---|
788 | spat = arg2[2].arg_ptr.arg_spat; |
---|
789 | if (!(spat->spat_flags & SPAT_ONCE) && |
---|
790 | nothing_in_common(arg1,spat->spat_repl)) { |
---|
791 | spat->spat_repl[1].arg_ptr.arg_stab = |
---|
792 | arg1[1].arg_ptr.arg_stab; |
---|
793 | arg1[1].arg_ptr.arg_stab = Nullstab; |
---|
794 | spat->spat_flags |= SPAT_ONCE; |
---|
795 | arg_free(arg1); /* recursive */ |
---|
796 | arg[1].arg_ptr.arg_arg = Nullarg; |
---|
797 | free_arg(arg); /* non-recursive */ |
---|
798 | return arg2; /* split has builtin assign */ |
---|
799 | } |
---|
800 | } |
---|
801 | else if (nothing_in_common(arg1,arg2)) |
---|
802 | arg->arg_flags &= ~AF_COMMON; |
---|
803 | if (arg->arg_type == O_ASSIGN) { |
---|
804 | arg[1].arg_flags |= AF_ARYOK; |
---|
805 | arg[2].arg_flags |= AF_ARYOK; |
---|
806 | } |
---|
807 | } |
---|
808 | else if (arg->arg_type == O_ASSIGN) |
---|
809 | arg[1].arg_flags |= AF_ARYOK; |
---|
810 | } |
---|
811 | else if (arg1->arg_type == O_HELEM || arg1->arg_type == O_LHELEM) |
---|
812 | if (arg->arg_type == O_DEFINED) |
---|
813 | arg1->arg_type = O_HELEM; /* avoid creating one */ |
---|
814 | else |
---|
815 | arg1->arg_type = O_LHELEM; |
---|
816 | else if (arg1->arg_type == O_HASH || arg1->arg_type == O_LHASH) { |
---|
817 | arg1->arg_type = O_LHASH; |
---|
818 | if (arg->arg_len > 1) { |
---|
819 | dehoist(arg,2); |
---|
820 | arg2 = arg[2].arg_ptr.arg_arg; |
---|
821 | if (nothing_in_common(arg1,arg2)) |
---|
822 | arg->arg_flags &= ~AF_COMMON; |
---|
823 | if (arg->arg_type == O_ASSIGN) { |
---|
824 | arg[1].arg_flags |= AF_ARYOK; |
---|
825 | arg[2].arg_flags |= AF_ARYOK; |
---|
826 | } |
---|
827 | } |
---|
828 | else if (arg->arg_type == O_ASSIGN) |
---|
829 | arg[1].arg_flags |= AF_ARYOK; |
---|
830 | } |
---|
831 | else if (arg1->arg_type == O_ASLICE) { |
---|
832 | arg1->arg_type = O_LASLICE; |
---|
833 | if (arg->arg_type == O_ASSIGN) { |
---|
834 | dehoist(arg,2); |
---|
835 | arg[1].arg_flags |= AF_ARYOK; |
---|
836 | arg[2].arg_flags |= AF_ARYOK; |
---|
837 | } |
---|
838 | } |
---|
839 | else if (arg1->arg_type == O_HSLICE) { |
---|
840 | arg1->arg_type = O_LHSLICE; |
---|
841 | if (arg->arg_type == O_ASSIGN) { |
---|
842 | dehoist(arg,2); |
---|
843 | arg[1].arg_flags |= AF_ARYOK; |
---|
844 | arg[2].arg_flags |= AF_ARYOK; |
---|
845 | } |
---|
846 | } |
---|
847 | else if ((arg->arg_type == O_DEFINED || arg->arg_type == O_UNDEF) && |
---|
848 | (arg1->arg_type == (perldb ? O_DBSUBR : O_SUBR)) ) { |
---|
849 | arg[1].arg_type |= A_DONT; |
---|
850 | } |
---|
851 | else if (arg1->arg_type == O_SUBSTR || arg1->arg_type == O_VEC) { |
---|
852 | (void)l(arg1); |
---|
853 | Renewc(arg1->arg_ptr.arg_str, 1, struct lstring, STR); |
---|
854 | /* grow string struct to hold an lstring struct */ |
---|
855 | } |
---|
856 | else if (arg1->arg_type == O_ASSIGN) |
---|
857 | /*SUPPRESS 530*/ |
---|
858 | ; |
---|
859 | else { |
---|
860 | (void)sprintf(tokenbuf, |
---|
861 | "Illegal expression (%s) as lvalue",opname[arg1->arg_type]); |
---|
862 | yyerror(tokenbuf); |
---|
863 | return arg; |
---|
864 | } |
---|
865 | arg[1].arg_type = A_LEXPR | (arg[1].arg_type & A_DONT); |
---|
866 | if (arg->arg_type == O_ASSIGN && (arg1[1].arg_flags & AF_ARYOK)) { |
---|
867 | arg[1].arg_flags |= AF_ARYOK; |
---|
868 | if (arg->arg_len > 1) |
---|
869 | arg[2].arg_flags |= AF_ARYOK; |
---|
870 | } |
---|
871 | #ifdef DEBUGGING |
---|
872 | if (debug & 16) |
---|
873 | fprintf(stderr,"lval LEXPR\n"); |
---|
874 | #endif |
---|
875 | return arg; |
---|
876 | } |
---|
877 | if (i == A_STAR || i == A_LSTAR) { |
---|
878 | arg[1].arg_type = A_LSTAR | (arg[1].arg_type & A_DONT); |
---|
879 | return arg; |
---|
880 | } |
---|
881 | |
---|
882 | /* not an array reference, should be a register name */ |
---|
883 | |
---|
884 | if (i != A_STAB && i != A_LVAL) { |
---|
885 | (void)sprintf(tokenbuf, |
---|
886 | "Illegal item (%s) as lvalue",argname[arg[1].arg_type&A_MASK]); |
---|
887 | yyerror(tokenbuf); |
---|
888 | return arg; |
---|
889 | } |
---|
890 | arg[1].arg_type = A_LVAL | (arg[1].arg_type & A_DONT); |
---|
891 | #ifdef DEBUGGING |
---|
892 | if (debug & 16) |
---|
893 | fprintf(stderr,"lval LVAL\n"); |
---|
894 | #endif |
---|
895 | return arg; |
---|
896 | } |
---|
897 | |
---|
898 | ARG * |
---|
899 | fixl(type,arg) |
---|
900 | int type; |
---|
901 | ARG *arg; |
---|
902 | { |
---|
903 | if (type == O_DEFINED || type == O_UNDEF) { |
---|
904 | if (arg->arg_type != O_ITEM) |
---|
905 | arg = hide_ary(arg); |
---|
906 | if (arg->arg_type == O_ITEM) { |
---|
907 | type = arg[1].arg_type & A_MASK; |
---|
908 | if (type == A_EXPR || type == A_LEXPR) |
---|
909 | arg[1].arg_type = A_LEXPR|A_DONT; |
---|
910 | } |
---|
911 | } |
---|
912 | return arg; |
---|
913 | } |
---|
914 | |
---|
915 | void |
---|
916 | dehoist(arg,i) |
---|
917 | ARG *arg; |
---|
918 | { |
---|
919 | ARG *tmparg; |
---|
920 | |
---|
921 | if (arg[i].arg_type != A_EXPR) { /* dehoist */ |
---|
922 | tmparg = make_op(O_ITEM,1,Nullarg,Nullarg,Nullarg); |
---|
923 | tmparg[1] = arg[i]; |
---|
924 | arg[i].arg_ptr.arg_arg = tmparg; |
---|
925 | arg[i].arg_type = A_EXPR; |
---|
926 | } |
---|
927 | } |
---|
928 | |
---|
929 | ARG * |
---|
930 | addflags(i,flags,arg) |
---|
931 | register ARG *arg; |
---|
932 | { |
---|
933 | arg[i].arg_flags |= flags; |
---|
934 | return arg; |
---|
935 | } |
---|
936 | |
---|
937 | ARG * |
---|
938 | hide_ary(arg) |
---|
939 | ARG *arg; |
---|
940 | { |
---|
941 | if (arg->arg_type == O_ARRAY || arg->arg_type == O_HASH) |
---|
942 | return make_op(O_ITEM,1,arg,Nullarg,Nullarg); |
---|
943 | return arg; |
---|
944 | } |
---|
945 | |
---|
946 | /* maybe do a join on multiple array dimensions */ |
---|
947 | |
---|
948 | ARG * |
---|
949 | jmaybe(arg) |
---|
950 | register ARG *arg; |
---|
951 | { |
---|
952 | if (arg && arg->arg_type == O_COMMA) { |
---|
953 | arg = listish(arg); |
---|
954 | arg = make_op(O_JOIN, 2, |
---|
955 | stab2arg(A_STAB,stabent(";",TRUE)), |
---|
956 | make_list(arg), |
---|
957 | Nullarg); |
---|
958 | } |
---|
959 | return arg; |
---|
960 | } |
---|
961 | |
---|
962 | ARG * |
---|
963 | make_list(arg) |
---|
964 | register ARG *arg; |
---|
965 | { |
---|
966 | register int i; |
---|
967 | register ARG *node; |
---|
968 | register ARG *nxtnode; |
---|
969 | register int j; |
---|
970 | STR *tmpstr; |
---|
971 | |
---|
972 | if (!arg) { |
---|
973 | arg = op_new(0); |
---|
974 | arg->arg_type = O_LIST; |
---|
975 | } |
---|
976 | if (arg->arg_type != O_COMMA) { |
---|
977 | if (arg->arg_type != O_ARRAY) |
---|
978 | arg->arg_flags |= AF_LISTISH; /* see listish() below */ |
---|
979 | arg->arg_flags |= AF_LISTISH; /* see listish() below */ |
---|
980 | return arg; |
---|
981 | } |
---|
982 | for (i = 2, node = arg; ; i++) { |
---|
983 | if (node->arg_len < 2) |
---|
984 | break; |
---|
985 | if (node[1].arg_type != A_EXPR) |
---|
986 | break; |
---|
987 | node = node[1].arg_ptr.arg_arg; |
---|
988 | if (node->arg_type != O_COMMA) |
---|
989 | break; |
---|
990 | } |
---|
991 | if (i > 2) { |
---|
992 | node = arg; |
---|
993 | arg = op_new(i); |
---|
994 | tmpstr = arg->arg_ptr.arg_str; |
---|
995 | StructCopy(node, arg, ARG); /* copy everything except the STR */ |
---|
996 | arg->arg_ptr.arg_str = tmpstr; |
---|
997 | for (j = i; ; ) { |
---|
998 | StructCopy(node+2, arg+j, ARG); |
---|
999 | arg[j].arg_flags |= AF_ARYOK; |
---|
1000 | --j; /* Bug in Xenix compiler */ |
---|
1001 | if (j < 2) { |
---|
1002 | StructCopy(node+1, arg+1, ARG); |
---|
1003 | free_arg(node); |
---|
1004 | break; |
---|
1005 | } |
---|
1006 | nxtnode = node[1].arg_ptr.arg_arg; |
---|
1007 | free_arg(node); |
---|
1008 | node = nxtnode; |
---|
1009 | } |
---|
1010 | } |
---|
1011 | arg[1].arg_flags |= AF_ARYOK; |
---|
1012 | arg[2].arg_flags |= AF_ARYOK; |
---|
1013 | arg->arg_type = O_LIST; |
---|
1014 | arg->arg_len = i; |
---|
1015 | str_free(arg->arg_ptr.arg_str); |
---|
1016 | arg->arg_ptr.arg_str = Nullstr; |
---|
1017 | return arg; |
---|
1018 | } |
---|
1019 | |
---|
1020 | /* turn a single item into a list */ |
---|
1021 | |
---|
1022 | ARG * |
---|
1023 | listish(arg) |
---|
1024 | ARG *arg; |
---|
1025 | { |
---|
1026 | if (arg && arg->arg_flags & AF_LISTISH) |
---|
1027 | arg = make_op(O_LIST,1,arg,Nullarg,Nullarg); |
---|
1028 | return arg; |
---|
1029 | } |
---|
1030 | |
---|
1031 | ARG * |
---|
1032 | maybelistish(optype, arg) |
---|
1033 | int optype; |
---|
1034 | ARG *arg; |
---|
1035 | { |
---|
1036 | ARG *tmparg = arg; |
---|
1037 | |
---|
1038 | if (optype == O_RETURN && arg->arg_type == O_ITEM && |
---|
1039 | arg[1].arg_type == A_EXPR && (tmparg = arg[1].arg_ptr.arg_arg) && |
---|
1040 | ((tmparg->arg_flags & AF_LISTISH) || (tmparg->arg_type == O_ARRAY) )) { |
---|
1041 | tmparg = listish(tmparg); |
---|
1042 | free_arg(arg); |
---|
1043 | arg = tmparg; |
---|
1044 | } |
---|
1045 | else if (optype == O_PRTF || |
---|
1046 | (arg->arg_type == O_ASLICE || arg->arg_type == O_HSLICE || |
---|
1047 | arg->arg_type == O_F_OR_R) ) |
---|
1048 | arg = listish(arg); |
---|
1049 | return arg; |
---|
1050 | } |
---|
1051 | |
---|
1052 | /* mark list of local variables */ |
---|
1053 | |
---|
1054 | ARG * |
---|
1055 | localize(arg) |
---|
1056 | ARG *arg; |
---|
1057 | { |
---|
1058 | arg->arg_flags |= AF_LOCAL; |
---|
1059 | return arg; |
---|
1060 | } |
---|
1061 | |
---|
1062 | ARG * |
---|
1063 | rcatmaybe(arg) |
---|
1064 | ARG *arg; |
---|
1065 | { |
---|
1066 | ARG *arg2; |
---|
1067 | |
---|
1068 | if (arg->arg_type == O_CONCAT && arg[2].arg_type == A_EXPR) { |
---|
1069 | arg2 = arg[2].arg_ptr.arg_arg; |
---|
1070 | if (arg2->arg_type == O_ITEM && arg2[1].arg_type == A_READ) { |
---|
1071 | arg->arg_type = O_RCAT; |
---|
1072 | arg[2].arg_type = arg2[1].arg_type; |
---|
1073 | arg[2].arg_ptr = arg2[1].arg_ptr; |
---|
1074 | free_arg(arg2); |
---|
1075 | } |
---|
1076 | } |
---|
1077 | return arg; |
---|
1078 | } |
---|
1079 | |
---|
1080 | ARG * |
---|
1081 | stab2arg(atype,stab) |
---|
1082 | int atype; |
---|
1083 | register STAB *stab; |
---|
1084 | { |
---|
1085 | register ARG *arg; |
---|
1086 | |
---|
1087 | arg = op_new(1); |
---|
1088 | arg->arg_type = O_ITEM; |
---|
1089 | arg[1].arg_type = atype; |
---|
1090 | arg[1].arg_ptr.arg_stab = stab; |
---|
1091 | return arg; |
---|
1092 | } |
---|
1093 | |
---|
1094 | ARG * |
---|
1095 | cval_to_arg(cval) |
---|
1096 | register char *cval; |
---|
1097 | { |
---|
1098 | register ARG *arg; |
---|
1099 | |
---|
1100 | arg = op_new(1); |
---|
1101 | arg->arg_type = O_ITEM; |
---|
1102 | arg[1].arg_type = A_SINGLE; |
---|
1103 | arg[1].arg_ptr.arg_str = str_make(cval,0); |
---|
1104 | Safefree(cval); |
---|
1105 | return arg; |
---|
1106 | } |
---|
1107 | |
---|
1108 | ARG * |
---|
1109 | op_new(numargs) |
---|
1110 | int numargs; |
---|
1111 | { |
---|
1112 | register ARG *arg; |
---|
1113 | |
---|
1114 | Newz(203,arg, numargs + 1, ARG); |
---|
1115 | arg->arg_ptr.arg_str = Str_new(21,0); |
---|
1116 | arg->arg_len = numargs; |
---|
1117 | return arg; |
---|
1118 | } |
---|
1119 | |
---|
1120 | void |
---|
1121 | free_arg(arg) |
---|
1122 | ARG *arg; |
---|
1123 | { |
---|
1124 | str_free(arg->arg_ptr.arg_str); |
---|
1125 | Safefree(arg); |
---|
1126 | } |
---|
1127 | |
---|
1128 | ARG * |
---|
1129 | make_match(type,expr,spat) |
---|
1130 | int type; |
---|
1131 | ARG *expr; |
---|
1132 | SPAT *spat; |
---|
1133 | { |
---|
1134 | register ARG *arg; |
---|
1135 | |
---|
1136 | arg = make_op(type,2,expr,Nullarg,Nullarg); |
---|
1137 | |
---|
1138 | arg[2].arg_type = A_SPAT|A_DONT; |
---|
1139 | arg[2].arg_ptr.arg_spat = spat; |
---|
1140 | #ifdef DEBUGGING |
---|
1141 | if (debug & 16) |
---|
1142 | fprintf(stderr,"make_match SPAT=%lx\n",(long)spat); |
---|
1143 | #endif |
---|
1144 | |
---|
1145 | if (type == O_SUBST || type == O_NSUBST) { |
---|
1146 | if (arg[1].arg_type != A_STAB) { |
---|
1147 | yyerror("Illegal lvalue"); |
---|
1148 | } |
---|
1149 | arg[1].arg_type = A_LVAL; |
---|
1150 | } |
---|
1151 | return arg; |
---|
1152 | } |
---|
1153 | |
---|
1154 | ARG * |
---|
1155 | cmd_to_arg(cmd) |
---|
1156 | CMD *cmd; |
---|
1157 | { |
---|
1158 | register ARG *arg; |
---|
1159 | |
---|
1160 | arg = op_new(1); |
---|
1161 | arg->arg_type = O_ITEM; |
---|
1162 | arg[1].arg_type = A_CMD; |
---|
1163 | arg[1].arg_ptr.arg_cmd = cmd; |
---|
1164 | return arg; |
---|
1165 | } |
---|
1166 | |
---|
1167 | /* Check two expressions to see if there is any identifier in common */ |
---|
1168 | |
---|
1169 | static int |
---|
1170 | nothing_in_common(arg1,arg2) |
---|
1171 | ARG *arg1; |
---|
1172 | ARG *arg2; |
---|
1173 | { |
---|
1174 | static int thisexpr = 0; /* I don't care if this wraps */ |
---|
1175 | |
---|
1176 | thisexpr++; |
---|
1177 | if (arg_common(arg1,thisexpr,1)) |
---|
1178 | return 0; /* hit eval or do {} */ |
---|
1179 | stab_lastexpr(defstab) = thisexpr; /* pretend to hit @_ */ |
---|
1180 | if (arg_common(arg2,thisexpr,0)) |
---|
1181 | return 0; /* hit identifier again */ |
---|
1182 | return 1; |
---|
1183 | } |
---|
1184 | |
---|
1185 | /* Recursively descend an expression and mark any identifier or check |
---|
1186 | * it to see if it was marked already. |
---|
1187 | */ |
---|
1188 | |
---|
1189 | static int |
---|
1190 | arg_common(arg,exprnum,marking) |
---|
1191 | register ARG *arg; |
---|
1192 | int exprnum; |
---|
1193 | int marking; |
---|
1194 | { |
---|
1195 | register int i; |
---|
1196 | |
---|
1197 | if (!arg) |
---|
1198 | return 0; |
---|
1199 | for (i = arg->arg_len; i >= 1; i--) { |
---|
1200 | switch (arg[i].arg_type & A_MASK) { |
---|
1201 | case A_NULL: |
---|
1202 | break; |
---|
1203 | case A_LEXPR: |
---|
1204 | case A_EXPR: |
---|
1205 | if (arg_common(arg[i].arg_ptr.arg_arg,exprnum,marking)) |
---|
1206 | return 1; |
---|
1207 | break; |
---|
1208 | case A_CMD: |
---|
1209 | return 1; /* assume hanky panky */ |
---|
1210 | case A_STAR: |
---|
1211 | case A_LSTAR: |
---|
1212 | case A_STAB: |
---|
1213 | case A_LVAL: |
---|
1214 | case A_ARYLEN: |
---|
1215 | case A_LARYLEN: |
---|
1216 | if (marking) |
---|
1217 | stab_lastexpr(arg[i].arg_ptr.arg_stab) = exprnum; |
---|
1218 | else if (stab_lastexpr(arg[i].arg_ptr.arg_stab) == exprnum) |
---|
1219 | return 1; |
---|
1220 | break; |
---|
1221 | case A_DOUBLE: |
---|
1222 | case A_BACKTICK: |
---|
1223 | { |
---|
1224 | register char *s = arg[i].arg_ptr.arg_str->str_ptr; |
---|
1225 | register char *send = s + arg[i].arg_ptr.arg_str->str_cur; |
---|
1226 | register STAB *stab; |
---|
1227 | |
---|
1228 | while (*s) { |
---|
1229 | if (*s == '$' && s[1]) { |
---|
1230 | s = scanident(s,send,tokenbuf); |
---|
1231 | stab = stabent(tokenbuf,TRUE); |
---|
1232 | if (marking) |
---|
1233 | stab_lastexpr(stab) = exprnum; |
---|
1234 | else if (stab_lastexpr(stab) == exprnum) |
---|
1235 | return 1; |
---|
1236 | continue; |
---|
1237 | } |
---|
1238 | else if (*s == '\\' && s[1]) |
---|
1239 | s++; |
---|
1240 | s++; |
---|
1241 | } |
---|
1242 | } |
---|
1243 | break; |
---|
1244 | case A_SPAT: |
---|
1245 | if (spat_common(arg[i].arg_ptr.arg_spat,exprnum,marking)) |
---|
1246 | return 1; |
---|
1247 | break; |
---|
1248 | case A_READ: |
---|
1249 | case A_INDREAD: |
---|
1250 | case A_GLOB: |
---|
1251 | case A_WORD: |
---|
1252 | case A_SINGLE: |
---|
1253 | break; |
---|
1254 | } |
---|
1255 | } |
---|
1256 | switch (arg->arg_type) { |
---|
1257 | case O_ARRAY: |
---|
1258 | case O_LARRAY: |
---|
1259 | if ((arg[1].arg_type & A_MASK) == A_STAB) |
---|
1260 | (void)aadd(arg[1].arg_ptr.arg_stab); |
---|
1261 | break; |
---|
1262 | case O_HASH: |
---|
1263 | case O_LHASH: |
---|
1264 | if ((arg[1].arg_type & A_MASK) == A_STAB) |
---|
1265 | (void)hadd(arg[1].arg_ptr.arg_stab); |
---|
1266 | break; |
---|
1267 | case O_EVAL: |
---|
1268 | case O_SUBR: |
---|
1269 | case O_DBSUBR: |
---|
1270 | return 1; |
---|
1271 | } |
---|
1272 | return 0; |
---|
1273 | } |
---|
1274 | |
---|
1275 | static int |
---|
1276 | spat_common(spat,exprnum,marking) |
---|
1277 | register SPAT *spat; |
---|
1278 | int exprnum; |
---|
1279 | int marking; |
---|
1280 | { |
---|
1281 | if (spat->spat_runtime) |
---|
1282 | if (arg_common(spat->spat_runtime,exprnum,marking)) |
---|
1283 | return 1; |
---|
1284 | if (spat->spat_repl) { |
---|
1285 | if (arg_common(spat->spat_repl,exprnum,marking)) |
---|
1286 | return 1; |
---|
1287 | } |
---|
1288 | return 0; |
---|
1289 | } |
---|