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annotate lwasm/pragma.c @ 235:e3741cf53e00

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Fix error messages related to undefined symbols in lwlink Make lwlink not complain about seciton base and length symbols. Also silence duplicate complaints about undefined symbols. There is no need to complain about undefined symbols during the file/section resolution stage! If they are truly undefined, they'll still be undefined at the reference resolution stage.
author William Astle <lost@l-w.ca>
date Sat, 11 Aug 2012 15:18:58 -0600
parents 5d969517db74
children 0c4b3e8b4d0b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 pragma.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
2
7317fbe024af Clean up insane number of compiler warnings under -Wall
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22 #include <string.h>
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23 #include <ctype.h>
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24
0
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25 #include <lw_string.h>
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26 #include <lw_alloc.h>
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27
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28 #include "lwasm.h"
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29 #include "instab.h"
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30 #include "input.h"
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31
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32 struct pragma_list
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33 {
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34 const char *setstr;
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35 const char *resetstr;
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36 int flag;
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37 };
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38
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39 struct pragma_stack_entry
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40 {
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41 int magic; // must always be at the start of any input stack entry
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42 int flag; // the pragma flag bit
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43 char str[1]; // magic number - this will be allocated bigger
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44 // string will be what's needed to re-instate a pragma
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45 };
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46
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47 static const struct pragma_list set_pragmas[] =
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48 {
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49 { "dollarnotlocal", "nodollarnotlocal", PRAGMA_DOLLARNOTLOCAL },
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b6b8c2645f5c Add back the dollarlocal and nodollarlocal pragma strings for compatibility with the documentation.
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50 { "nodollarlocal", "dollarlocal", PRAGMA_DOLLARNOTLOCAL },
108
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51 { "noindex0tonone", "index0tonone", PRAGMA_NOINDEX0TONONE },
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52 { "undefextern", "noundefextern", PRAGMA_UNDEFEXTERN },
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53 { "cescapes", "nocescapes", PRAGMA_CESCAPES },
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54 { "importundefexport", "noimportundefexport", PRAGMA_IMPORTUNDEFEXPORT },
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55 { "pcaspcr", "nopcaspcr", PRAGMA_PCASPCR },
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56 { "shadow", "noshadow", PRAGMA_SHADOW },
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57 { "nolist", "list", PRAGMA_NOLIST },
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58 { "autobranchlength", "noautobranchlength", PRAGMA_AUTOBRANCHLENGTH },
206
080bb67d84f2 Add export pragma
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59 { "export", "noexport", PRAGMA_EXPORT },
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07e1fac76321 Added pragma to allow non case sensitive symbols
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60 { "symbolnocase", "nosymbolnocase", PRAGMA_SYMBOLNOCASE },
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61 { "nosymbolcase", "symbolcase", PRAGMA_SYMBOLNOCASE },
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62 { "condundefzero", "nocondundefzero", PRAGMA_CONDUNDEFZERO },
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63 { 0, 0, 0}
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64 };
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65
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66 int parse_pragma_string(asmstate_t *as, char *str, int ignoreerr)
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67 {
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68 char *p;
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69 int i;
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70 const char *np = str;
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71 int pragmas = as -> pragmas;
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72
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73 while (np)
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74 {
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75 p = lw_token(np, ',', &np);
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76 for (i = 0; set_pragmas[i].setstr; i++)
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77 {
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78 if (!strcasecmp(p, set_pragmas[i].setstr))
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79 {
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80 pragmas |= set_pragmas[i].flag;
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81 goto out;
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82 }
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83 if (!strcasecmp(p, set_pragmas[i].resetstr))
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84 {
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85 pragmas &= ~(set_pragmas[i].flag);
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86 goto out;
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87 }
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88 }
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89 /* unrecognized pragma here */
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90 if (!ignoreerr)
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91 {
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92 lw_free(p);
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93 return 0;
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94 }
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95 out:
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96 lw_free(p);
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97 }
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98 as -> pragmas = pragmas;
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99 return 1;
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100 }
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101
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102 PARSEFUNC(pseudo_parse_pragma)
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103 {
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104 char *ps, *t;
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105
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106 for (t = *p; *t && !isspace(*t); t++)
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107 /* do nothing */ ;
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108
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109 ps = lw_strndup(*p, t - *p);
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110 *p = t;
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111
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112 l -> len = 0;
0
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113
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114 if (parse_pragma_string(as, ps, 0) == 0)
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115 {
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116 lwasm_register_error(as, l, "Unrecognized pragma string");
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117 }
81
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118 if (as -> pragmas & PRAGMA_NOLIST)
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119 l -> pragmas |= PRAGMA_NOLIST;
0
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120 lw_free(ps);
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121 }
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122
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123 PARSEFUNC(pseudo_parse_starpragma)
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124 {
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125 char *ps, *t;
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8fa52c3f2970 Make *pragma work correctly
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126
0
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127 for (t = *p; *t && !isspace(*t); t++)
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128 /* do nothing */ ;
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129
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130 ps = lw_strndup(*p, t - *p);
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131 *p = t;
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132
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133 l -> len = 0;
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134
0
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135 // *pragma must NEVER throw an error
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
136 parse_pragma_string(as, ps, 1);
81
428068681cbf Added nolist pragma to suppress listing output of non-code generating lines
Lost Wizard (lost@starbug3)
parents: 56
diff changeset
137 if (as -> pragmas & PRAGMA_NOLIST)
428068681cbf Added nolist pragma to suppress listing output of non-code generating lines
Lost Wizard (lost@starbug3)
parents: 56
diff changeset
138 l -> pragmas |= PRAGMA_NOLIST;
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
139 lw_free(ps);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
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140 }
108
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
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141
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lost@l-w.ca
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142 static int pragma_stack_compare(input_stack_entry *e, void *d)
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143 {
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lost@l-w.ca
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144 int flag = *((int *)d);
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parents: 85
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145 struct pragma_stack_entry *pse = (struct pragma_stack_entry *)e;
110
38c1537857ce Pragma stack at parse stage now works
lost@l-w.ca
parents: 108
diff changeset
146
108
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lost@l-w.ca
parents: 85
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147 if (pse -> flag == flag)
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lost@l-w.ca
parents: 85
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148 return 1;
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lost@l-w.ca
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149 return 0;
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parents: 85
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150 }
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151
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lost@l-w.ca
parents: 85
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152 PARSEFUNC(pseudo_parse_starpragmapop)
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lost@l-w.ca
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153 {
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lost@l-w.ca
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154 char *ps, *t;
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lost@l-w.ca
parents: 85
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155 char *pp;
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lost@l-w.ca
parents: 85
diff changeset
156 int i;
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lost@l-w.ca
parents: 85
diff changeset
157 const char *np;
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lost@l-w.ca
parents: 85
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158 struct pragma_stack_entry *pse;
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159
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lost@l-w.ca
parents: 85
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160 for (t = *p; *t && !isspace(*t); t++)
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lost@l-w.ca
parents: 85
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161 /* do nothing */ ;
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lost@l-w.ca
parents: 85
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162
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lost@l-w.ca
parents: 85
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163 ps = lw_strndup(*p, t - *p);
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lost@l-w.ca
parents: 85
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164 *p = t;
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165
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lost@l-w.ca
parents: 85
diff changeset
166 l -> len = 0;
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lost@l-w.ca
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167
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parents: 85
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168 // *pragma stuff must never throw an error
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parents: 85
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169 np = ps;
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170
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171 while (np)
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172 {
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lost@l-w.ca
parents: 85
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173 pp = lw_token(np, ',', &np);
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lost@l-w.ca
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174 for (i = 0; set_pragmas[i].setstr; i++)
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parents: 85
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175 {
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parents: 85
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176 if (!strcasecmp(pp, set_pragmas[i].setstr) || !strcasecmp(pp, set_pragmas[i].resetstr))
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177 {
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178 pse = (struct pragma_stack_entry *)input_stack_pop(as, 0x42424242, pragma_stack_compare, (void *)&(set_pragmas[i].flag));
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lost@l-w.ca
parents: 85
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179 if (pse)
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parents: 85
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180 {
110
38c1537857ce Pragma stack at parse stage now works
lost@l-w.ca
parents: 108
diff changeset
181 debug_message(as, 100, "Popped pragma string %s", pse->str);
108
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lost@l-w.ca
parents: 85
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182 parse_pragma_string(as, (char *)&(pse->str), 1);
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lost@l-w.ca
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183 lw_free(pse);
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lost@l-w.ca
parents: 85
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184 }
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parents: 85
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185 if (set_pragmas[i].flag == PRAGMA_NOLIST)
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lost@l-w.ca
parents: 85
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186 l -> pragmas |= PRAGMA_NOLIST;
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parents: 85
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187 }
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parents: 85
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188 }
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lost@l-w.ca
parents: 85
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189 lw_free(pp);
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lost@l-w.ca
parents: 85
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190 }
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191
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lost@l-w.ca
parents: 85
diff changeset
192 lw_free(ps);
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lost@l-w.ca
parents: 85
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193 }
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parents: 85
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194
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parents: 85
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195 PARSEFUNC(pseudo_parse_starpragmapush)
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lost@l-w.ca
parents: 85
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196 {
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197 char *ps, *t;
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lost@l-w.ca
parents: 85
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198 char *pp;
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lost@l-w.ca
parents: 85
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199 int i;
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lost@l-w.ca
parents: 85
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200 const char *np;
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lost@l-w.ca
parents: 85
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201 struct pragma_stack_entry *pse;
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lost@l-w.ca
parents: 85
diff changeset
202
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parents: 85
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203 for (t = *p; *t && !isspace(*t); t++)
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lost@l-w.ca
parents: 85
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204 /* do nothing */ ;
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lost@l-w.ca
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diff changeset
205
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lost@l-w.ca
parents: 85
diff changeset
206 ps = lw_strndup(*p, t - *p);
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lost@l-w.ca
parents: 85
diff changeset
207 *p = t;
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208
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lost@l-w.ca
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diff changeset
209 l -> len = 0;
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210
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lost@l-w.ca
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211 // *pragma stuff must never throw an error
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lost@l-w.ca
parents: 85
diff changeset
212 np = ps;
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lost@l-w.ca
parents: 85
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213
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lost@l-w.ca
parents: 85
diff changeset
214 while (np)
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parents: 85
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215 {
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lost@l-w.ca
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216 pp = lw_token(np, ',', &np);
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lost@l-w.ca
parents: 85
diff changeset
217 for (i = 0; set_pragmas[i].setstr; i++)
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lost@l-w.ca
parents: 85
diff changeset
218 {
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lost@l-w.ca
parents: 85
diff changeset
219 if (!strcasecmp(pp, set_pragmas[i].setstr) || !strcasecmp(pp, set_pragmas[i].resetstr))
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lost@l-w.ca
parents: 85
diff changeset
220 {
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lost@l-w.ca
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diff changeset
221 /* found set or reset pragma */
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lost@l-w.ca
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diff changeset
222 /* push pragma state */
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lost@l-w.ca
parents: 85
diff changeset
223 if (as -> pragmas & (set_pragmas[i].flag))
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lost@l-w.ca
parents: 85
diff changeset
224 {
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lost@l-w.ca
parents: 85
diff changeset
225 /* use set string */
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lost@l-w.ca
parents: 85
diff changeset
226 t = (char *)set_pragmas[i].setstr;
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lost@l-w.ca
parents: 85
diff changeset
227 }
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lost@l-w.ca
parents: 85
diff changeset
228 else
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lost@l-w.ca
parents: 85
diff changeset
229 {
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lost@l-w.ca
parents: 85
diff changeset
230 /* use reset string */
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lost@l-w.ca
parents: 85
diff changeset
231 t = (char *)set_pragmas[i].resetstr;
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lost@l-w.ca
parents: 85
diff changeset
232 }
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lost@l-w.ca
parents: 85
diff changeset
233 pse = lw_alloc(sizeof(struct pragma_stack_entry) + strlen(t));
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lost@l-w.ca
parents: 85
diff changeset
234 pse -> flag = set_pragmas[i].flag;
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lost@l-w.ca
parents: 85
diff changeset
235 pse -> magic = 0x42424242;
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lost@l-w.ca
parents: 85
diff changeset
236 strcpy((char *)&(pse -> str), t);
110
38c1537857ce Pragma stack at parse stage now works
lost@l-w.ca
parents: 108
diff changeset
237 debug_message(as, 100, "Pushed pragma string %s", pse->str);
38c1537857ce Pragma stack at parse stage now works
lost@l-w.ca
parents: 108
diff changeset
238
108
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
239 input_stack_push(as, (input_stack_entry *)pse);
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lost@l-w.ca
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diff changeset
240
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lost@l-w.ca
parents: 85
diff changeset
241 if (set_pragmas[i].flag == PRAGMA_NOLIST)
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lost@l-w.ca
parents: 85
diff changeset
242 l -> pragmas |= PRAGMA_NOLIST;
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lost@l-w.ca
parents: 85
diff changeset
243 }
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lost@l-w.ca
parents: 85
diff changeset
244 }
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lost@l-w.ca
parents: 85
diff changeset
245 lw_free(pp);
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lost@l-w.ca
parents: 85
diff changeset
246 }
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lost@l-w.ca
parents: 85
diff changeset
247
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
248 lw_free(ps);
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lost@l-w.ca
parents: 85
diff changeset
249 }
9960e05cbe3a Added *pragmapush and *pragmapop; still seems to be nonfunctional
lost@l-w.ca
parents: 85
diff changeset
250