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1 | /* $RCSfile: array.c,v $$Revision: 4.0.1.3 $$Date: 92/06/08 11:45:05 $ |
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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 |
6 | * License or the Artistic License, as specified in the README file. |
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7 | * |
8 | * $Log: array.c,v $ |
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9 | * Revision 4.0.1.3 92/06/08 11:45:05 lwall |
10 | * patch20: Perl now distinguishes overlapped copies from non-overlapped |
11 | * |
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12 | * Revision 4.0.1.2 91/11/05 16:00:14 lwall |
13 | * patch11: random cleanup |
14 | * patch11: passing non-existend array elements to subrouting caused core dump |
15 | * |
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16 | * Revision 4.0.1.1 91/06/07 10:19:08 lwall |
17 | * patch4: new copyright notice |
18 | * |
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19 | * Revision 4.0 91/03/20 01:03:32 lwall |
20 | * 4.0 baseline. |
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21 | * |
22 | */ |
23 | |
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24 | #include "EXTERN.h" |
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25 | #include "perl.h" |
26 | |
27 | STR * |
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28 | afetch(ar,key,lval) |
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29 | register ARRAY *ar; |
30 | int key; |
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31 | int lval; |
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32 | { |
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33 | STR *str; |
34 | |
35 | if (key < 0 || key > ar->ary_fill) { |
36 | if (lval && key >= 0) { |
37 | if (ar->ary_flags & ARF_REAL) |
38 | str = Str_new(5,0); |
39 | else |
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40 | str = str_mortal(&str_undef); |
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41 | (void)astore(ar,key,str); |
42 | return str; |
43 | } |
44 | else |
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45 | return &str_undef; |
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46 | } |
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47 | if (!ar->ary_array[key]) { |
48 | if (lval) { |
49 | str = Str_new(6,0); |
50 | (void)astore(ar,key,str); |
51 | return str; |
52 | } |
53 | return &str_undef; |
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54 | } |
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55 | return ar->ary_array[key]; |
56 | } |
57 | |
58 | bool |
59 | astore(ar,key,val) |
60 | register ARRAY *ar; |
61 | int key; |
62 | STR *val; |
63 | { |
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64 | int retval; |
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65 | |
66 | if (key < 0) |
67 | return FALSE; |
68 | if (key > ar->ary_max) { |
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69 | int newmax; |
70 | |
71 | if (ar->ary_alloc != ar->ary_array) { |
72 | retval = ar->ary_array - ar->ary_alloc; |
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73 | Move(ar->ary_array, ar->ary_alloc, ar->ary_max+1, STR*); |
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74 | Zero(ar->ary_alloc+ar->ary_max+1, retval, STR*); |
75 | ar->ary_max += retval; |
76 | ar->ary_array -= retval; |
77 | if (key > ar->ary_max - 10) { |
78 | newmax = key + ar->ary_max; |
79 | goto resize; |
80 | } |
81 | } |
82 | else { |
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83 | if (ar->ary_alloc) { |
84 | newmax = key + ar->ary_max / 5; |
85 | resize: |
86 | Renew(ar->ary_alloc,newmax+1, STR*); |
87 | Zero(&ar->ary_alloc[ar->ary_max+1], newmax - ar->ary_max, STR*); |
88 | } |
89 | else { |
90 | newmax = key < 4 ? 4 : key; |
91 | Newz(2,ar->ary_alloc, newmax+1, STR*); |
92 | } |
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93 | ar->ary_array = ar->ary_alloc; |
94 | ar->ary_max = newmax; |
95 | } |
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96 | } |
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97 | if (ar->ary_flags & ARF_REAL) { |
98 | if (ar->ary_fill < key) { |
99 | while (++ar->ary_fill < key) { |
100 | if (ar->ary_array[ar->ary_fill] != Nullstr) { |
101 | str_free(ar->ary_array[ar->ary_fill]); |
102 | ar->ary_array[ar->ary_fill] = Nullstr; |
103 | } |
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104 | } |
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105 | } |
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106 | retval = (ar->ary_array[key] != Nullstr); |
107 | if (retval) |
108 | str_free(ar->ary_array[key]); |
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109 | } |
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110 | else |
111 | retval = 0; |
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112 | ar->ary_array[key] = val; |
113 | return retval; |
114 | } |
115 | |
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116 | ARRAY * |
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117 | anew(stab) |
118 | STAB *stab; |
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119 | { |
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120 | register ARRAY *ar; |
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121 | |
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122 | New(1,ar,1,ARRAY); |
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123 | ar->ary_magic = Str_new(7,0); |
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124 | ar->ary_alloc = ar->ary_array = 0; |
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125 | str_magic(ar->ary_magic, stab, '#', Nullch, 0); |
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126 | ar->ary_max = ar->ary_fill = -1; |
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127 | ar->ary_flags = ARF_REAL; |
128 | return ar; |
129 | } |
130 | |
131 | ARRAY * |
132 | afake(stab,size,strp) |
133 | STAB *stab; |
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134 | register int size; |
135 | register STR **strp; |
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136 | { |
137 | register ARRAY *ar; |
138 | |
139 | New(3,ar,1,ARRAY); |
140 | New(4,ar->ary_alloc,size+1,STR*); |
141 | Copy(strp,ar->ary_alloc,size,STR*); |
142 | ar->ary_array = ar->ary_alloc; |
143 | ar->ary_magic = Str_new(8,0); |
144 | str_magic(ar->ary_magic, stab, '#', Nullch, 0); |
145 | ar->ary_fill = size - 1; |
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146 | ar->ary_max = size - 1; |
147 | ar->ary_flags = 0; |
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148 | while (size--) { |
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149 | if (*strp) |
150 | (*strp)->str_pok &= ~SP_TEMP; |
151 | strp++; |
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152 | } |
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153 | return ar; |
154 | } |
155 | |
156 | void |
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157 | aclear(ar) |
158 | register ARRAY *ar; |
159 | { |
160 | register int key; |
161 | |
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162 | if (!ar || !(ar->ary_flags & ARF_REAL) || ar->ary_max < 0) |
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163 | return; |
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164 | /*SUPPRESS 560*/ |
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165 | if (key = ar->ary_array - ar->ary_alloc) { |
166 | ar->ary_max += key; |
167 | ar->ary_array -= key; |
168 | } |
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169 | for (key = 0; key <= ar->ary_max; key++) |
170 | str_free(ar->ary_array[key]); |
171 | ar->ary_fill = -1; |
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172 | Zero(ar->ary_array, ar->ary_max+1, STR*); |
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173 | } |
174 | |
175 | void |
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176 | afree(ar) |
177 | register ARRAY *ar; |
178 | { |
179 | register int key; |
180 | |
181 | if (!ar) |
182 | return; |
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183 | /*SUPPRESS 560*/ |
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184 | if (key = ar->ary_array - ar->ary_alloc) { |
185 | ar->ary_max += key; |
186 | ar->ary_array -= key; |
187 | } |
188 | if (ar->ary_flags & ARF_REAL) { |
189 | for (key = 0; key <= ar->ary_max; key++) |
190 | str_free(ar->ary_array[key]); |
191 | } |
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192 | str_free(ar->ary_magic); |
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193 | Safefree(ar->ary_alloc); |
194 | Safefree(ar); |
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195 | } |
196 | |
197 | bool |
198 | apush(ar,val) |
199 | register ARRAY *ar; |
200 | STR *val; |
201 | { |
202 | return astore(ar,++(ar->ary_fill),val); |
203 | } |
204 | |
205 | STR * |
206 | apop(ar) |
207 | register ARRAY *ar; |
208 | { |
209 | STR *retval; |
210 | |
211 | if (ar->ary_fill < 0) |
212 | return Nullstr; |
213 | retval = ar->ary_array[ar->ary_fill]; |
214 | ar->ary_array[ar->ary_fill--] = Nullstr; |
215 | return retval; |
216 | } |
217 | |
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218 | void |
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219 | aunshift(ar,num) |
220 | register ARRAY *ar; |
221 | register int num; |
222 | { |
223 | register int i; |
224 | register STR **sstr,**dstr; |
225 | |
226 | if (num <= 0) |
227 | return; |
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228 | if (ar->ary_array - ar->ary_alloc >= num) { |
229 | ar->ary_max += num; |
230 | ar->ary_fill += num; |
231 | while (num--) |
232 | *--ar->ary_array = Nullstr; |
233 | } |
234 | else { |
235 | (void)astore(ar,ar->ary_fill+num,(STR*)0); /* maybe extend array */ |
236 | dstr = ar->ary_array + ar->ary_fill; |
237 | sstr = dstr - num; |
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238 | #ifdef BUGGY_MSC5 |
239 | # pragma loop_opt(off) /* don't loop-optimize the following code */ |
240 | #endif /* BUGGY_MSC5 */ |
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241 | for (i = ar->ary_fill - num; i >= 0; i--) { |
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242 | *dstr-- = *sstr--; |
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243 | #ifdef BUGGY_MSC5 |
244 | # pragma loop_opt() /* loop-optimization back to command-line setting */ |
245 | #endif /* BUGGY_MSC5 */ |
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246 | } |
247 | Zero(ar->ary_array, num, STR*); |
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248 | } |
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249 | } |
250 | |
251 | STR * |
252 | ashift(ar) |
253 | register ARRAY *ar; |
254 | { |
255 | STR *retval; |
256 | |
257 | if (ar->ary_fill < 0) |
258 | return Nullstr; |
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259 | retval = *ar->ary_array; |
260 | *(ar->ary_array++) = Nullstr; |
261 | ar->ary_max--; |
262 | ar->ary_fill--; |
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263 | return retval; |
264 | } |
265 | |
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266 | int |
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267 | alen(ar) |
268 | register ARRAY *ar; |
269 | { |
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270 | return ar->ary_fill; |
271 | } |
272 | |
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273 | void |
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274 | afill(ar, fill) |
275 | register ARRAY *ar; |
276 | int fill; |
277 | { |
278 | if (fill < 0) |
279 | fill = -1; |
280 | if (fill <= ar->ary_max) |
281 | ar->ary_fill = fill; |
282 | else |
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283 | (void)astore(ar,fill,Nullstr); |
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284 | } |