Mercurial > projects > ldc
annotate dmd2/macro.c @ 834:f466f475b654
Added proper "need 'this' to access member foo" errors instead of "variable foo not resolved" for some cases, added FIXME for the old error!
Added a bit more information to the runtime's cyclic dependency detection exception.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Tue, 09 Dec 2008 01:56:39 +0100 |
parents | f04dde6e882c |
children | 638d16625da2 |
rev | line source |
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1 |
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2 // Copyright (c) 1999-2006 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 /* Simple macro text processor. |
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11 */ |
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12 |
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13 #include <stdio.h> |
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14 #include <string.h> |
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15 #include <time.h> |
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16 #include <ctype.h> |
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17 #include <assert.h> |
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18 |
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19 #if IN_GCC || IN_LLVM |
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20 #include "mem.h" |
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21 #else |
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22 #if _WIN32 |
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23 #include "..\root\mem.h" |
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24 #elif POSIX |
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25 #include "../root/mem.h" |
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26 #else |
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27 #error "fix this" |
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28 #endif |
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29 #endif |
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30 |
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31 #include "root.h" |
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32 #include "macro.h" |
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33 |
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34 #define isidstart(c) (isalpha(c) || (c) == '_') |
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35 #define isidchar(c) (isalnum(c) || (c) == '_') |
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36 |
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37 unsigned char *memdup(unsigned char *p, size_t len) |
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38 { |
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39 return (unsigned char *)memcpy(mem.malloc(len), p, len); |
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40 } |
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41 |
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42 Macro::Macro(unsigned char *name, size_t namelen, unsigned char *text, size_t textlen) |
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43 { |
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44 next = NULL; |
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45 |
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46 #if 1 |
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47 this->name = name; |
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48 this->namelen = namelen; |
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49 |
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50 this->text = text; |
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51 this->textlen = textlen; |
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52 #else |
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53 this->name = name; |
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54 this->namelen = namelen; |
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55 |
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56 this->text = text; |
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57 this->textlen = textlen; |
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58 #endif |
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59 inuse = 0; |
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60 } |
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61 |
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62 |
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63 Macro *Macro::search(unsigned char *name, size_t namelen) |
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64 { Macro *table; |
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65 |
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66 //printf("Macro::search(%.*s)\n", namelen, name); |
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67 for (table = this; table; table = table->next) |
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68 { |
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69 if (table->namelen == namelen && |
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70 memcmp(table->name, name, namelen) == 0) |
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71 { |
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72 //printf("\tfound %d\n", table->textlen); |
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73 break; |
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74 } |
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75 } |
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76 return table; |
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77 } |
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78 |
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79 Macro *Macro::define(Macro **ptable, unsigned char *name, size_t namelen, unsigned char *text, size_t textlen) |
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80 { |
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81 //printf("Macro::define('%.*s' = '%.*s')\n", namelen, name, textlen, text); |
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82 |
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83 Macro *table; |
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84 |
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85 //assert(ptable); |
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86 for (table = *ptable; table; table = table->next) |
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87 { |
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88 if (table->namelen == namelen && |
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89 memcmp(table->name, name, namelen) == 0) |
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90 { |
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91 table->text = text; |
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92 table->textlen = textlen; |
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93 return table; |
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94 } |
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95 } |
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96 table = new Macro(name, namelen, text, textlen); |
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97 table->next = *ptable; |
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98 *ptable = table; |
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99 return table; |
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100 } |
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101 |
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102 /********************************************************** |
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103 * Given buffer p[0..end], extract argument marg[0..marglen]. |
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|
104 * Params: |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
105 * n 0: get entire argument |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
106 * 1..9: get nth argument |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
107 * -1: get 2nd through end |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
108 */ |
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109 |
f04dde6e882c
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|
110 unsigned extractArgN(unsigned char *p, unsigned end, unsigned char **pmarg, unsigned *pmarglen, int n) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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changeset
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111 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
112 /* Scan forward for matching right parenthesis. |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
113 * Nest parentheses. |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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114 * Skip over $( and $) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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changeset
|
115 * Skip over "..." and '...' strings inside HTML tags. |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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116 * Skip over <!-- ... --> comments. |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
117 * Skip over previous macro insertions |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
118 * Set marglen. |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
119 */ |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
120 unsigned parens = 1; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
121 unsigned char instring = 0; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
122 unsigned incomment = 0; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
123 unsigned intag = 0; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
124 unsigned inexp = 0; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
125 unsigned argn = 0; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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126 |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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127 unsigned v = 0; |
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128 |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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129 Largstart: |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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130 #if 1 |
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131 // Skip first space, if any, to find the start of the macro argument |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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132 if (v < end && isspace(p[v])) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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133 v++; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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134 #else |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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135 // Skip past spaces to find the start of the macro argument |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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136 for (; v < end && isspace(p[v]); v++) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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137 ; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
138 #endif |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
139 *pmarg = p + v; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
140 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
141 for (; v < end; v++) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
142 { unsigned char c = p[v]; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
143 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
144 switch (c) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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145 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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146 case ',': |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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147 if (!inexp && !instring && !incomment && parens == 1) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
148 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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149 argn++; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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150 if (argn == 1 && n == -1) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
151 { v++; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
152 goto Largstart; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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153 } |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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154 if (argn == n) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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155 break; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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156 if (argn + 1 == n) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
157 { v++; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
158 goto Largstart; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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159 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
160 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
161 continue; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
162 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
163 case '(': |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
164 if (!inexp && !instring && !incomment) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
165 parens++; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
166 continue; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
167 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
168 case ')': |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
169 if (!inexp && !instring && !incomment && --parens == 0) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
170 { |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
171 break; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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|
172 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
173 continue; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
174 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
175 case '"': |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
176 case '\'': |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
177 if (!inexp && !incomment && intag) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
178 { |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
179 if (c == instring) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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180 instring = 0; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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181 else if (!instring) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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182 instring = c; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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183 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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diff
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|
184 continue; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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185 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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186 case '<': |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
187 if (!inexp && !instring && !incomment) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
188 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
189 if (v + 6 < end && |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
190 p[v + 1] == '!' && |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
191 p[v + 2] == '-' && |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
192 p[v + 3] == '-') |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
193 { |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
194 incomment = 1; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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195 v += 3; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
196 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
197 else if (v + 2 < end && |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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198 isalpha(p[v + 1])) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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199 intag = 1; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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200 } |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
201 continue; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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202 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
203 case '>': |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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204 if (!inexp) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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205 intag = 0; |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
206 continue; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
207 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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|
208 case '-': |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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changeset
|
209 if (!inexp && |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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changeset
|
210 !instring && |
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211 incomment && |
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212 v + 2 < end && |
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213 p[v + 1] == '-' && |
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214 p[v + 2] == '>') |
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215 { |
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216 incomment = 0; |
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217 v += 2; |
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218 } |
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219 continue; |
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220 |
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221 case 0xFF: |
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222 if (v + 1 < end) |
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223 { |
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224 if (p[v + 1] == '{') |
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225 inexp++; |
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226 else if (p[v + 1] == '}') |
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227 inexp--; |
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228 } |
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229 continue; |
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230 |
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231 default: |
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232 continue; |
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233 } |
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234 break; |
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235 } |
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236 if (argn == 0 && n == -1) |
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237 *pmarg = p + v; |
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238 *pmarglen = p + v - *pmarg; |
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239 //printf("extractArg%d('%.*s') = '%.*s'\n", n, end, p, *pmarglen, *pmarg); |
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240 return v; |
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241 } |
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242 |
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243 |
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244 /***************************************************** |
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245 * Expand macro in place in buf. |
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246 * Only look at the text in buf from start to end. |
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247 */ |
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248 |
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249 void Macro::expand(OutBuffer *buf, unsigned start, unsigned *pend, |
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250 unsigned char *arg, unsigned arglen) |
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251 { |
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252 #if 0 |
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253 printf("Macro::expand(buf[%d..%d], arg = '%.*s')\n", start, *pend, arglen, arg); |
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254 printf("Buf is: '%.*s'\n", *pend - start, buf->data + start); |
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255 #endif |
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256 |
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257 static int nest; |
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258 if (nest > 100) // limit recursive expansion |
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259 return; |
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260 nest++; |
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261 |
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262 unsigned end = *pend; |
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263 assert(start <= end); |
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264 assert(end <= buf->offset); |
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265 |
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266 /* First pass - replace $0 |
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267 */ |
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268 arg = memdup(arg, arglen); |
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269 for (unsigned u = start; u + 1 < end; ) |
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270 { |
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271 unsigned char *p = buf->data; // buf->data is not loop invariant |
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272 |
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273 /* Look for $0, but not $$0, and replace it with arg. |
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274 */ |
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275 if (p[u] == '$' && (isdigit(p[u + 1]) || p[u + 1] == '+')) |
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276 { |
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277 if (u > start && p[u - 1] == '$') |
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278 { // Don't expand $$0, but replace it with $0 |
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279 buf->remove(u - 1, 1); |
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280 end--; |
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281 u += 1; // now u is one past the closing '1' |
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282 continue; |
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283 } |
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284 |
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285 unsigned char c = p[u + 1]; |
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286 int n = (c == '+') ? -1 : c - '0'; |
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287 |
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288 unsigned char *marg; |
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289 unsigned marglen; |
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290 extractArgN(arg, arglen, &marg, &marglen, n); |
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291 if (marglen == 0) |
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292 { // Just remove macro invocation |
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293 //printf("Replacing '$%c' with '%.*s'\n", p[u + 1], marglen, marg); |
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294 buf->remove(u, 2); |
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295 end -= 2; |
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296 } |
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297 else if (c == '+') |
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298 { |
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299 // Replace '$+' with 'arg' |
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300 //printf("Replacing '$%c' with '%.*s'\n", p[u + 1], marglen, marg); |
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301 buf->remove(u, 2); |
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302 buf->insert(u, marg, marglen); |
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303 end += marglen - 2; |
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304 |
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305 // Scan replaced text for further expansion |
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306 unsigned mend = u + marglen; |
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307 expand(buf, u, &mend, NULL, 0); |
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308 end += mend - (u + marglen); |
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309 u = mend; |
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310 } |
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311 else |
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312 { |
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313 // Replace '$1' with '\xFF{arg\xFF}' |
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314 //printf("Replacing '$%c' with '\xFF{%.*s\xFF}'\n", p[u + 1], marglen, marg); |
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315 buf->data[u] = 0xFF; |
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316 buf->data[u + 1] = '{'; |
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317 buf->insert(u + 2, marg, marglen); |
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318 buf->insert(u + 2 + marglen, "\xFF}", 2); |
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319 end += -2 + 2 + marglen + 2; |
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320 |
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321 // Scan replaced text for further expansion |
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322 unsigned mend = u + 2 + marglen; |
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323 expand(buf, u + 2, &mend, NULL, 0); |
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324 end += mend - (u + 2 + marglen); |
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325 u = mend; |
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326 } |
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327 //printf("u = %d, end = %d\n", u, end); |
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328 //printf("#%.*s#\n", end, &buf->data[0]); |
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329 continue; |
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330 } |
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331 |
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332 u++; |
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333 } |
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334 |
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335 /* Second pass - replace other macros |
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336 */ |
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337 for (unsigned u = start; u + 4 < end; ) |
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338 { |
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339 unsigned char *p = buf->data; // buf->data is not loop invariant |
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340 |
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341 /* A valid start of macro expansion is $(c, where c is |
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342 * an id start character, and not $$(c. |
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343 */ |
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344 if (p[u] == '$' && p[u + 1] == '(' && isidstart(p[u + 2])) |
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345 { |
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346 //printf("\tfound macro start '%c'\n", p[u + 2]); |
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347 unsigned char *name = p + u + 2; |
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348 unsigned namelen = 0; |
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349 |
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350 unsigned char *marg; |
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351 unsigned marglen; |
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352 |
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353 unsigned v; |
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354 /* Scan forward to find end of macro name and |
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355 * beginning of macro argument (marg). |
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356 */ |
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357 for (v = u + 2; v < end; v++) |
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358 { unsigned char c = p[v]; |
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359 |
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360 if (!isidchar(c)) |
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361 { // We've gone past the end of the macro name. |
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362 namelen = v - (u + 2); |
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363 break; |
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364 } |
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365 } |
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366 |
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367 v += extractArgN(p + v, end - v, &marg, &marglen, 0); |
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368 assert(v <= end); |
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369 |
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370 if (v < end) |
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371 { // v is on the closing ')' |
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372 if (u > start && p[u - 1] == '$') |
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373 { // Don't expand $$(NAME), but replace it with $(NAME) |
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374 buf->remove(u - 1, 1); |
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375 end--; |
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376 u = v; // now u is one past the closing ')' |
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377 continue; |
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378 } |
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379 |
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380 Macro *m = search(name, namelen); |
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381 if (m) |
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382 { |
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383 #if 0 |
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384 if (m->textlen && m->text[0] == ' ') |
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385 { m->text++; |
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386 m->textlen--; |
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387 } |
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388 #endif |
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389 if (m->inuse && marglen == 0) |
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390 { // Remove macro invocation |
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391 buf->remove(u, v + 1 - u); |
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392 end -= v + 1 - u; |
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393 } |
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394 else if (m->inuse && arglen == marglen && memcmp(arg, marg, arglen) == 0) |
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395 { // Recursive expansion; just leave in place |
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396 |
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397 } |
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398 else |
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399 { |
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400 //printf("\tmacro '%.*s'(%.*s) = '%.*s'\n", m->namelen, m->name, marglen, marg, m->textlen, m->text); |
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401 #if 1 |
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402 marg = memdup(marg, marglen); |
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403 // Insert replacement text |
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404 buf->spread(v + 1, 2 + m->textlen + 2); |
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405 buf->data[v + 1] = 0xFF; |
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406 buf->data[v + 2] = '{'; |
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407 memcpy(buf->data + v + 3, m->text, m->textlen); |
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408 buf->data[v + 3 + m->textlen] = 0xFF; |
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409 buf->data[v + 3 + m->textlen + 1] = '}'; |
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410 |
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411 end += 2 + m->textlen + 2; |
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412 |
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413 // Scan replaced text for further expansion |
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414 m->inuse++; |
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415 unsigned mend = v + 1 + 2+m->textlen+2; |
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416 expand(buf, v + 1, &mend, marg, marglen); |
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417 end += mend - (v + 1 + 2+m->textlen+2); |
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418 m->inuse--; |
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419 |
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420 buf->remove(u, v + 1 - u); |
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421 end -= v + 1 - u; |
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422 u += mend - (v + 1); |
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423 #else |
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424 // Insert replacement text |
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425 buf->insert(v + 1, m->text, m->textlen); |
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426 end += m->textlen; |
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427 |
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428 // Scan replaced text for further expansion |
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429 m->inuse++; |
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430 unsigned mend = v + 1 + m->textlen; |
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431 expand(buf, v + 1, &mend, marg, marglen); |
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432 end += mend - (v + 1 + m->textlen); |
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433 m->inuse--; |
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434 |
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435 buf->remove(u, v + 1 - u); |
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436 end -= v + 1 - u; |
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437 u += mend - (v + 1); |
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438 #endif |
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439 mem.free(marg); |
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440 //printf("u = %d, end = %d\n", u, end); |
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441 //printf("#%.*s#\n", end - u, &buf->data[u]); |
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442 continue; |
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443 } |
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444 } |
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445 else |
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446 { |
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447 // Replace $(NAME) with nothing |
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448 buf->remove(u, v + 1 - u); |
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449 end -= (v + 1 - u); |
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450 continue; |
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451 } |
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452 } |
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453 } |
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454 u++; |
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455 } |
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456 mem.free(arg); |
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457 *pend = end; |
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458 nest--; |
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459 } |