Mercurial > projects > ldc
annotate dmd2/stringtable.c @ 972:d66ab756c75b
Change the way the version is printed (more verbose, with short hash)
If the user has patches managed by the mq extension, the version and hash
printed are those of the qparent revision (the revision the patches were
applied on top of) instead of tip.
Also fixes a bug: print LLVM revision even if there are local modifications to
it.
Sorry for the long line in the perl file. I have no idea how to break it up.
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Tue, 17 Feb 2009 01:13:18 +0100 |
parents | f04dde6e882c |
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rev | line source |
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758
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1 |
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2 // Copyright (c) 1999-2008 by Digital Mars |
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3 // All Rights Reserved |
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4 // written by Walter Bright |
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5 // http://www.digitalmars.com |
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6 // License for redistribution is by either the Artistic License |
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7 // in artistic.txt, or the GNU General Public License in gnu.txt. |
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8 // See the included readme.txt for details. |
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9 |
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10 |
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11 #include <stdio.h> |
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12 #include <string.h> |
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13 #include <stdlib.h> |
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14 |
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15 #include "root.h" |
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16 #include "mem.h" |
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17 #include "dchar.h" |
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18 #include "lstring.h" |
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19 #include "stringtable.h" |
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20 |
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21 StringTable::StringTable(unsigned size) |
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22 { |
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23 table = (void **)mem.calloc(size, sizeof(void *)); |
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24 tabledim = size; |
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25 count = 0; |
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26 } |
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27 |
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28 StringTable::~StringTable() |
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29 { |
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30 unsigned i; |
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31 |
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32 // Zero out dangling pointers to help garbage collector. |
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33 // Should zero out StringEntry's too. |
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34 for (i = 0; i < count; i++) |
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35 table[i] = NULL; |
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36 |
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37 mem.free(table); |
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38 table = NULL; |
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39 } |
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40 |
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41 struct StringEntry |
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42 { |
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43 StringEntry *left; |
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44 StringEntry *right; |
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45 hash_t hash; |
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46 |
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47 StringValue value; |
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48 |
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49 static StringEntry *alloc(const dchar *s, unsigned len); |
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50 }; |
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51 |
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52 StringEntry *StringEntry::alloc(const dchar *s, unsigned len) |
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53 { |
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54 StringEntry *se; |
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55 |
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56 se = (StringEntry *) mem.calloc(1,sizeof(StringEntry) - sizeof(Lstring) + Lstring::size(len)); |
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57 se->value.lstring.length = len; |
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58 se->hash = Dchar::calcHash(s,len); |
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59 memcpy(se->value.lstring.string, s, len * sizeof(dchar)); |
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60 return se; |
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61 } |
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62 |
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63 void **StringTable::search(const dchar *s, unsigned len) |
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64 { |
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65 hash_t hash; |
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66 unsigned u; |
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67 int cmp; |
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68 StringEntry **se; |
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69 |
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70 //printf("StringTable::search(%p,%d)\n",s,len); |
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71 hash = Dchar::calcHash(s,len); |
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72 u = hash % tabledim; |
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73 se = (StringEntry **)&table[u]; |
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74 //printf("\thash = %d, u = %d\n",hash,u); |
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75 while (*se) |
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76 { |
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77 cmp = (*se)->hash - hash; |
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78 if (cmp == 0) |
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79 { |
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80 cmp = (*se)->value.lstring.len() - len; |
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81 if (cmp == 0) |
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82 { |
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83 cmp = Dchar::memcmp(s,(*se)->value.lstring.toDchars(),len); |
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84 if (cmp == 0) |
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85 break; |
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86 } |
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87 } |
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88 if (cmp < 0) |
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89 se = &(*se)->left; |
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90 else |
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91 se = &(*se)->right; |
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92 } |
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93 //printf("\treturn %p, %p\n",se, (*se)); |
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94 return (void **)se; |
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95 } |
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96 |
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97 StringValue *StringTable::lookup(const dchar *s, unsigned len) |
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98 { StringEntry *se; |
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99 |
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100 se = *(StringEntry **)search(s,len); |
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101 if (se) |
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102 return &se->value; |
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103 else |
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104 return NULL; |
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105 } |
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106 |
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107 StringValue *StringTable::update(const dchar *s, unsigned len) |
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108 { StringEntry **pse; |
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109 StringEntry *se; |
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110 |
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111 pse = (StringEntry **)search(s,len); |
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112 se = *pse; |
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113 if (!se) // not in table: so create new entry |
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114 { |
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115 se = StringEntry::alloc(s, len); |
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116 *pse = se; |
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117 } |
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118 return &se->value; |
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119 } |
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120 |
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121 StringValue *StringTable::insert(const dchar *s, unsigned len) |
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122 { StringEntry **pse; |
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123 StringEntry *se; |
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124 |
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125 pse = (StringEntry **)search(s,len); |
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126 se = *pse; |
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127 if (se) |
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128 return NULL; // error: already in table |
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129 else |
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130 { |
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131 se = StringEntry::alloc(s, len); |
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132 *pse = se; |
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133 } |
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134 return &se->value; |
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135 } |
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136 |
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137 |
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138 |
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139 |