Mercurial > projects > ldc
annotate dmd2/macro.c @ 1650:40bd4a0d4870
Update to work with LLVM 2.7.
Removed use of dyn_cast, llvm no compiles
without exceptions and rtti by
default. We do need exceptions for the libconfig stuff, but rtti isn't
necessary (anymore).
Debug info needs to be rewritten, as in LLVM 2.7 the format has
completely changed. To have something to look at while rewriting, the
old code has been wrapped inside #ifndef DISABLE_DEBUG_INFO , this means
that you have to define this to compile at the moment.
Updated tango 0.99.9 patch to include updated EH runtime code, which is
needed for LLVM 2.7 as well.
author | Tomas Lindquist Olsen |
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date | Wed, 19 May 2010 12:42:32 +0200 |
parents | 638d16625da2 |
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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 #include "rmem.h" |
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20 #include "root.h" |
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21 |
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22 #include "macro.h" |
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23 |
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24 #define isidstart(c) (isalpha(c) || (c) == '_') |
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25 #define isidchar(c) (isalnum(c) || (c) == '_') |
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26 |
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27 unsigned char *memdup(unsigned char *p, size_t len) |
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28 { |
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29 return (unsigned char *)memcpy(mem.malloc(len), p, len); |
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30 } |
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31 |
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32 Macro::Macro(unsigned char *name, size_t namelen, unsigned char *text, size_t textlen) |
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33 { |
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34 next = NULL; |
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35 |
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36 #if 1 |
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37 this->name = name; |
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38 this->namelen = namelen; |
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39 |
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40 this->text = text; |
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41 this->textlen = textlen; |
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42 #else |
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43 this->name = name; |
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44 this->namelen = namelen; |
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45 |
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46 this->text = text; |
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47 this->textlen = textlen; |
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48 #endif |
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49 inuse = 0; |
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50 } |
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51 |
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52 |
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53 Macro *Macro::search(unsigned char *name, size_t namelen) |
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54 { Macro *table; |
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55 |
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56 //printf("Macro::search(%.*s)\n", namelen, name); |
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57 for (table = this; table; table = table->next) |
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58 { |
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59 if (table->namelen == namelen && |
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60 memcmp(table->name, name, namelen) == 0) |
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61 { |
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62 //printf("\tfound %d\n", table->textlen); |
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63 break; |
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64 } |
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65 } |
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66 return table; |
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67 } |
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68 |
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69 Macro *Macro::define(Macro **ptable, unsigned char *name, size_t namelen, unsigned char *text, size_t textlen) |
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70 { |
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71 //printf("Macro::define('%.*s' = '%.*s')\n", namelen, name, textlen, text); |
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72 |
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73 Macro *table; |
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74 |
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75 //assert(ptable); |
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76 for (table = *ptable; table; table = table->next) |
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77 { |
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78 if (table->namelen == namelen && |
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79 memcmp(table->name, name, namelen) == 0) |
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80 { |
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81 table->text = text; |
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82 table->textlen = textlen; |
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83 return table; |
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84 } |
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85 } |
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86 table = new Macro(name, namelen, text, textlen); |
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87 table->next = *ptable; |
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88 *ptable = table; |
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89 return table; |
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90 } |
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91 |
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92 /********************************************************** |
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93 * Given buffer p[0..end], extract argument marg[0..marglen]. |
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94 * Params: |
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95 * n 0: get entire argument |
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96 * 1..9: get nth argument |
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97 * -1: get 2nd through end |
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98 */ |
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99 |
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100 unsigned extractArgN(unsigned char *p, unsigned end, unsigned char **pmarg, unsigned *pmarglen, int n) |
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101 { |
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102 /* Scan forward for matching right parenthesis. |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
103 * Nest parentheses. |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
104 * Skip over $( and $) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
105 * Skip over "..." and '...' strings inside HTML tags. |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
106 * Skip over <!-- ... --> comments. |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
107 * Skip over previous macro insertions |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
108 * Set marglen. |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
109 */ |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
110 unsigned parens = 1; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
111 unsigned char instring = 0; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
112 unsigned incomment = 0; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
113 unsigned intag = 0; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
diff
changeset
|
114 unsigned inexp = 0; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
115 unsigned argn = 0; |
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
|
116 |
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
|
117 unsigned v = 0; |
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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changeset
|
118 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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changeset
|
119 Largstart: |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
120 #if 1 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
121 // Skip first space, if any, to find the start of the macro argument |
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
|
122 if (v < end && isspace(p[v])) |
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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|
123 v++; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
124 #else |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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changeset
|
125 // Skip past spaces to find the start of the macro argument |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
126 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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changeset
|
127 ; |
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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changeset
|
128 #endif |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
129 *pmarg = p + v; |
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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changeset
|
130 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
131 for (; v < end; v++) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
132 { unsigned char c = p[v]; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
133 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
134 switch (c) |
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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changeset
|
135 { |
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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|
136 case ',': |
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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|
137 if (!inexp && !instring && !incomment && parens == 1) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
138 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
139 argn++; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
140 if (argn == 1 && n == -1) |
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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changeset
|
141 { v++; |
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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|
142 goto Largstart; |
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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|
143 } |
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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|
144 if (argn == n) |
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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|
145 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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|
146 if (argn + 1 == n) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
147 { v++; |
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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|
148 goto Largstart; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
149 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
150 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
151 continue; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
152 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
153 case '(': |
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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changeset
|
154 if (!inexp && !instring && !incomment) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
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|
155 parens++; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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diff
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|
156 continue; |
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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|
157 |
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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changeset
|
158 case ')': |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
159 if (!inexp && !instring && !incomment && --parens == 0) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
160 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
161 break; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
162 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
163 continue; |
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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changeset
|
164 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
165 case '"': |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
166 case '\'': |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
167 if (!inexp && !incomment && intag) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
168 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
169 if (c == instring) |
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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changeset
|
170 instring = 0; |
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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|
171 else if (!instring) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
172 instring = c; |
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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|
173 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
174 continue; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
175 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
176 case '<': |
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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changeset
|
177 if (!inexp && !instring && !incomment) |
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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changeset
|
178 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
179 if (v + 6 < end && |
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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changeset
|
180 p[v + 1] == '!' && |
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
|
181 p[v + 2] == '-' && |
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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changeset
|
182 p[v + 3] == '-') |
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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changeset
|
183 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
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|
184 incomment = 1; |
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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|
185 v += 3; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
186 } |
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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changeset
|
187 else if (v + 2 < end && |
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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|
188 isalpha(p[v + 1])) |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
189 intag = 1; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
190 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
191 continue; |
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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|
192 |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
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|
193 case '>': |
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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|
194 if (!inexp) |
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Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
195 intag = 0; |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
196 continue; |
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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|
197 |
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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|
198 case '-': |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
199 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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|
200 !instring && |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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parents:
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|
201 incomment && |
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
|
202 v + 2 < end && |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
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|
203 p[v + 1] == '-' && |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
204 p[v + 2] == '>') |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
205 { |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
206 incomment = 0; |
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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changeset
|
207 v += 2; |
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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changeset
|
208 } |
f04dde6e882c
Added initial D2 support, D2 frontend and changes to codegen to make things compile.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
209 continue; |
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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210 |
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211 case 0xFF: |
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212 if (v + 1 < end) |
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213 { |
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214 if (p[v + 1] == '{') |
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215 inexp++; |
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216 else if (p[v + 1] == '}') |
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217 inexp--; |
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218 } |
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219 continue; |
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220 |
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221 default: |
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222 continue; |
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223 } |
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224 break; |
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225 } |
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226 if (argn == 0 && n == -1) |
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227 *pmarg = p + v; |
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228 *pmarglen = p + v - *pmarg; |
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229 //printf("extractArg%d('%.*s') = '%.*s'\n", n, end, p, *pmarglen, *pmarg); |
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230 return v; |
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231 } |
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232 |
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233 |
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234 /***************************************************** |
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235 * Expand macro in place in buf. |
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236 * Only look at the text in buf from start to end. |
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237 */ |
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238 |
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239 void Macro::expand(OutBuffer *buf, unsigned start, unsigned *pend, |
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240 unsigned char *arg, unsigned arglen) |
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241 { |
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242 #if 0 |
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243 printf("Macro::expand(buf[%d..%d], arg = '%.*s')\n", start, *pend, arglen, arg); |
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244 printf("Buf is: '%.*s'\n", *pend - start, buf->data + start); |
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245 #endif |
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246 |
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247 static int nest; |
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248 if (nest > 100) // limit recursive expansion |
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249 return; |
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250 nest++; |
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251 |
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252 unsigned end = *pend; |
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253 assert(start <= end); |
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254 assert(end <= buf->offset); |
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255 |
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256 /* First pass - replace $0 |
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257 */ |
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258 arg = memdup(arg, arglen); |
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259 for (unsigned u = start; u + 1 < end; ) |
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260 { |
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261 unsigned char *p = buf->data; // buf->data is not loop invariant |
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262 |
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263 /* Look for $0, but not $$0, and replace it with arg. |
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264 */ |
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265 if (p[u] == '$' && (isdigit(p[u + 1]) || p[u + 1] == '+')) |
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266 { |
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267 if (u > start && p[u - 1] == '$') |
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268 { // Don't expand $$0, but replace it with $0 |
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269 buf->remove(u - 1, 1); |
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270 end--; |
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271 u += 1; // now u is one past the closing '1' |
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272 continue; |
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273 } |
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274 |
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275 unsigned char c = p[u + 1]; |
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276 int n = (c == '+') ? -1 : c - '0'; |
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277 |
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278 unsigned char *marg; |
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279 unsigned marglen; |
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280 extractArgN(arg, arglen, &marg, &marglen, n); |
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281 if (marglen == 0) |
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282 { // Just remove macro invocation |
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283 //printf("Replacing '$%c' with '%.*s'\n", p[u + 1], marglen, marg); |
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284 buf->remove(u, 2); |
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285 end -= 2; |
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286 } |
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287 else if (c == '+') |
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288 { |
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289 // Replace '$+' with 'arg' |
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290 //printf("Replacing '$%c' with '%.*s'\n", p[u + 1], marglen, marg); |
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291 buf->remove(u, 2); |
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292 buf->insert(u, marg, marglen); |
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293 end += marglen - 2; |
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294 |
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295 // Scan replaced text for further expansion |
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296 unsigned mend = u + marglen; |
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297 expand(buf, u, &mend, NULL, 0); |
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298 end += mend - (u + marglen); |
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299 u = mend; |
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300 } |
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301 else |
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302 { |
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303 // Replace '$1' with '\xFF{arg\xFF}' |
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304 //printf("Replacing '$%c' with '\xFF{%.*s\xFF}'\n", p[u + 1], marglen, marg); |
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305 buf->data[u] = 0xFF; |
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306 buf->data[u + 1] = '{'; |
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307 buf->insert(u + 2, marg, marglen); |
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308 buf->insert(u + 2 + marglen, "\xFF}", 2); |
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309 end += -2 + 2 + marglen + 2; |
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310 |
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311 // Scan replaced text for further expansion |
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312 unsigned mend = u + 2 + marglen; |
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313 expand(buf, u + 2, &mend, NULL, 0); |
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314 end += mend - (u + 2 + marglen); |
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315 u = mend; |
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316 } |
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317 //printf("u = %d, end = %d\n", u, end); |
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318 //printf("#%.*s#\n", end, &buf->data[0]); |
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319 continue; |
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320 } |
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321 |
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322 u++; |
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323 } |
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324 |
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325 /* Second pass - replace other macros |
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326 */ |
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327 for (unsigned u = start; u + 4 < end; ) |
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328 { |
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329 unsigned char *p = buf->data; // buf->data is not loop invariant |
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330 |
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331 /* A valid start of macro expansion is $(c, where c is |
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332 * an id start character, and not $$(c. |
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333 */ |
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334 if (p[u] == '$' && p[u + 1] == '(' && isidstart(p[u + 2])) |
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335 { |
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336 //printf("\tfound macro start '%c'\n", p[u + 2]); |
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337 unsigned char *name = p + u + 2; |
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338 unsigned namelen = 0; |
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339 |
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340 unsigned char *marg; |
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341 unsigned marglen; |
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342 |
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343 unsigned v; |
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344 /* Scan forward to find end of macro name and |
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345 * beginning of macro argument (marg). |
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346 */ |
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347 for (v = u + 2; v < end; v++) |
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348 { unsigned char c = p[v]; |
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349 |
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350 if (!isidchar(c)) |
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351 { // We've gone past the end of the macro name. |
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352 namelen = v - (u + 2); |
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353 break; |
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354 } |
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355 } |
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356 |
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357 v += extractArgN(p + v, end - v, &marg, &marglen, 0); |
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358 assert(v <= end); |
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359 |
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360 if (v < end) |
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361 { // v is on the closing ')' |
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362 if (u > start && p[u - 1] == '$') |
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363 { // Don't expand $$(NAME), but replace it with $(NAME) |
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364 buf->remove(u - 1, 1); |
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365 end--; |
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366 u = v; // now u is one past the closing ')' |
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367 continue; |
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368 } |
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369 |
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370 Macro *m = search(name, namelen); |
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371 if (m) |
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372 { |
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373 #if 0 |
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374 if (m->textlen && m->text[0] == ' ') |
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375 { m->text++; |
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376 m->textlen--; |
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377 } |
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378 #endif |
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379 if (m->inuse && marglen == 0) |
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380 { // Remove macro invocation |
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381 buf->remove(u, v + 1 - u); |
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382 end -= v + 1 - u; |
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383 } |
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384 else if (m->inuse && arglen == marglen && memcmp(arg, marg, arglen) == 0) |
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385 { // Recursive expansion; just leave in place |
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386 |
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387 } |
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388 else |
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389 { |
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390 //printf("\tmacro '%.*s'(%.*s) = '%.*s'\n", m->namelen, m->name, marglen, marg, m->textlen, m->text); |
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391 #if 1 |
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392 marg = memdup(marg, marglen); |
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393 // Insert replacement text |
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394 buf->spread(v + 1, 2 + m->textlen + 2); |
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395 buf->data[v + 1] = 0xFF; |
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396 buf->data[v + 2] = '{'; |
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397 memcpy(buf->data + v + 3, m->text, m->textlen); |
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398 buf->data[v + 3 + m->textlen] = 0xFF; |
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399 buf->data[v + 3 + m->textlen + 1] = '}'; |
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400 |
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401 end += 2 + m->textlen + 2; |
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402 |
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403 // Scan replaced text for further expansion |
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404 m->inuse++; |
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405 unsigned mend = v + 1 + 2+m->textlen+2; |
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406 expand(buf, v + 1, &mend, marg, marglen); |
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407 end += mend - (v + 1 + 2+m->textlen+2); |
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408 m->inuse--; |
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409 |
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410 buf->remove(u, v + 1 - u); |
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411 end -= v + 1 - u; |
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412 u += mend - (v + 1); |
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413 #else |
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414 // Insert replacement text |
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415 buf->insert(v + 1, m->text, m->textlen); |
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416 end += m->textlen; |
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417 |
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418 // Scan replaced text for further expansion |
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419 m->inuse++; |
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420 unsigned mend = v + 1 + m->textlen; |
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421 expand(buf, v + 1, &mend, marg, marglen); |
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422 end += mend - (v + 1 + m->textlen); |
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423 m->inuse--; |
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424 |
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425 buf->remove(u, v + 1 - u); |
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426 end -= v + 1 - u; |
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427 u += mend - (v + 1); |
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428 #endif |
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429 mem.free(marg); |
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430 //printf("u = %d, end = %d\n", u, end); |
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431 //printf("#%.*s#\n", end - u, &buf->data[u]); |
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432 continue; |
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433 } |
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434 } |
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435 else |
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436 { |
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437 // Replace $(NAME) with nothing |
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438 buf->remove(u, v + 1 - u); |
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439 end -= (v + 1 - u); |
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440 continue; |
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441 } |
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442 } |
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443 } |
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444 u++; |
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445 } |
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446 mem.free(arg); |
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447 *pend = end; |
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448 nest--; |
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449 } |