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annotate anagram/agcore/bpu.cpp @ 0:13d2b8934445

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Import AnaGram (near-)release tree into Mercurial.
author David A. Holland
date Sat, 22 Dec 2007 17:52:45 -0500
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1 /*
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2 * AnaGram, A System for Syntax Directed Programming
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3 * Copyright 1993-1999 Parsifal Software. All Rights Reserved.
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4 * See the file COPYING for license and usage terms.
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5 *
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6 * bpu.cpp - Utility routines for bpe3
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7 */
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8
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9 #include <ctype.h>
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10 #include <stdarg.h>
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11 #include "port.h"
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12
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13 #include "arrays.h"
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14 #include "bpe3.h"
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15 #include "bpu.h"
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16 #include "cd.h"
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17 #include "data.h"
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18 #include "dict.h"
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19 #include "engdef.h"
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20 #include "keyword.h"
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21 #include "myalloc.h"
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22 #include "q1glbl.h"
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23 #include "rule.h"
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24 #include "stacks.h"
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25 #include "symbol.h"
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26 #include "token.h"
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27
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28 //#define INCLUDE_LOGGING
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29 #include "log.h"
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30
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31
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32 void template_string(const char *name, const char *tp, const char tc) {
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33 ics();
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34 while (*tp) {
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35 char c = *tp++;
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36 if (c == tc) {
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37 ass(name);
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38 continue;
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39 }
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40 acs(c);
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41 }
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42 tss();
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43 }
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44
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45 AgString subs_template(const char *name, const char *tp, const char tc) {
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46 template_string(name, tp, tc);
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47 return buildAgString();
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48 }
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49
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50 unsigned find_token_number(const char *name) {
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51 return Symbol(name)->token_number;
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52 //return map_token_name[identify_string(name,tkn_dict)].token_number;
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53 }
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54
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55 int find_completions(int s, const unsigned **q) {
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56 state_number_map *sp = &map_state_number[s];
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57 const unsigned *p = lstptr(*sp, chain_completions);
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58 int n = sp->n_chain_completions;
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59 if (n == 0 && sp->chain_gotos_index == 0) {
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60 p = lstptr(*sp, completions);
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61 n = sp->n_completions;
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62 }
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63 *q = p;
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64 return n;
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65 }
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66
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67 void select_actions(int k) {
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68 int n = tis()/3;
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69 int *lb;
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70
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71 list_space(n+1);
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72 lb = list_base;
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73 iws();
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74 while (n--) {
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75 aws(lb[k]);
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76 k += 3;
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77 }
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78 }
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79
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80 void find_key_tokens(const int *pl, int n, int tw /*, int ct */) {
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81 LOGSECTION("find_key_tokens");
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82 LOGV(n);
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83 for (; n--; pl += tw) {
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84 //int tn = *pl;
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85 Token token = *pl;
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86 LOGV(token);
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87 //if (map_token_number[tn].key == 0) continue;
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88 //if (token->key == 0) continue;
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89 if (token->key.isNull()) {
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90 continue;
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91 }
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92 isws(token);
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93 }
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94 }
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95
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96
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97 /*
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98 * Note that the text of the defined format must not contain a newline.
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99 * Failure to abide by this rule will cause the line count to be
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100 * incorrect.
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101 */
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102
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103 void define_macro(const char *n, const char *fmt, ...) {
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104 va_list ap;
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105 fprintf(pe_file, "#define %s ", n);
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106 va_start(ap, fmt);
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107 vfprintf(pe_file, fmt, ap);
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108 va_end(ap);
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109 fputc('\n', pe_file);
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110 pe_line_count++;
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111 }
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112
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113 void define_macro_default(const char *n, const char *fmt, ...) {
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114 va_list ap;
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115 char name_only[80];
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116 char *ptr;
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117
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118 strcpy(name_only, n);
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119 ptr = strchr(name_only, '(');
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120
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121 if (ptr != NULL) {
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122 *ptr = 0;
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123 }
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124
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125 fprintf(pe_file, "#ifndef %s\n#define %s ", name_only, n);
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126 va_start(ap, fmt);
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127 vfprintf(pe_file, fmt, ap);
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128 va_end(ap);
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129 fprintf(pe_file, "\n#endif\n");
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130 pe_line_count += 3;
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131 }
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132
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133 unsigned char *key_string(int tn) {
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134 LOGSECTION("key_string");
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135 Keyword key = map_token_number[tn].key;
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136 LOGV(tn) LCV(key) LCV(Keyword::count());
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137
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138 if (key.isNull()) {
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139 return NULL;
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140 }
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141 LOGV(key->string);
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142 return (unsigned char *) key->string.pointer();
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143 }
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144
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145 /*
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146 * Function: reducing_token
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147 * Arguments:
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148 * token number, tn
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149 * state number, sn
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150 * Returns: 0 if tn is _not_ a reducing token in the given state
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151 * Otherwise, returns the number of the rule it reduces.
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152 */
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153
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154 #if 0 /* no longer used */
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155 unsigned reducing_token(unsigned tn, unsigned sn) {
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156 state_number_map *sp = &map_state_number[sn];
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157 const unsigned *p;
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158 unsigned n = sp->n_reductions; /* number of reductions in this state */
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159
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160 if (n) {
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161 p = lstptr(*sp, reductions);
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162 while (n--) {
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163 if (*p++ == tn) {
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164 return *p;
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165 }
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166 p++;
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167 }
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168 return 0;
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169 }
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David A. Holland
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diff changeset
170 if (sp->n_completed_forms != 1) {
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David A. Holland
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diff changeset
171 return 0;
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David A. Holland
parents:
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172 }
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David A. Holland
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diff changeset
173 if (shift_token(tn, sn)) {
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David A. Holland
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174 return 0;
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David A. Holland
parents:
diff changeset
175 }
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David A. Holland
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176 return *(lstptr(*sp,completed_forms));
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177 }
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diff changeset
178 #endif /* 0 - no longer used */
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179
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180 Rule ruleReducedBy(Token token, unsigned sn) {
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David A. Holland
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181 state_number_map *sp = &map_state_number[sn];
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David A. Holland
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diff changeset
182 const unsigned *p;
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David A. Holland
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183 unsigned n = sp->n_reductions; /* number of reductions in this state */
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184
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185 if (n) {
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diff changeset
186 p = lstptr(*sp, reductions);
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diff changeset
187 while (n--) {
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David A. Holland
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diff changeset
188 if (*p++ == (unsigned) token) {
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189 return *p;
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diff changeset
190 }
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191 p++;
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192 }
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193 return 0;
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194 }
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diff changeset
195 if (sp->n_completed_forms != 1) {
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David A. Holland
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196 // Exit if more than one completed rule
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197 return 0;
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198 }
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diff changeset
199 if (shift_token(token, sn)) {
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diff changeset
200 // Exit if there's a shift
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201 return 0;
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202 }
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203 // Default reduction, return rule #
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204 return *(lstptr(*sp, completed_forms));
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205 }
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206
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diff changeset
207 void select_write_fragment(const char *name, const char *modes,
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208 const char *suffix) {
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209 char fragment[80];
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210
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211 strcpy(fragment, name);
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212 strcat(fragment, modes);
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213 strcat(fragment, suffix);
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diff changeset
214 write_code_segment(fragment);
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215 }
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diff changeset
216
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diff changeset
217 int shift_token(unsigned tn, unsigned sn) {
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218 const unsigned *p;
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diff changeset
219 unsigned n;
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David A. Holland
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220
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221 n = find_gotos(sn, &p);
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diff changeset
222 while (n--) {
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diff changeset
223 if (*p == tn) {
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diff changeset
224 return 1;
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diff changeset
225 }
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diff changeset
226 else {
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diff changeset
227 p += 2;
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David A. Holland
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diff changeset
228 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
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diff changeset
229 }
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diff changeset
230
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
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diff changeset
231 n = find_completions(sn, &p);
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diff changeset
232 while (n--) {
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diff changeset
233 if (*p == tn) {
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234 return 1;
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235 }
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diff changeset
236 else {
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237 p += 2;
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238 }
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diff changeset
239 }
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240
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241 return 0;
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diff changeset
242 }
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243
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244 void count_pe_line(const char *s, int k) {
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245 LOGSECTION("count_pe_line");
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diff changeset
246
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diff changeset
247 while (k--) {
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diff changeset
248 if (s[k] == '\n') {
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249 pe_line_count++;
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250 }
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David A. Holland
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diff changeset
251 }
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diff changeset
252 LOGV(pe_line_count);
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diff changeset
253 }
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diff changeset
254
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
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diff changeset
255 int wps(const char *s) {
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David A. Holland
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diff changeset
256 LOGSECTION("wps");
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diff changeset
257 int k = strlen(s);
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David A. Holland
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diff changeset
258
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
259 fputs(s, pe_file);
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diff changeset
260 count_pe_line(s, k);
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diff changeset
261 return k;
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David A. Holland
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diff changeset
262 }
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David A. Holland
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diff changeset
263
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David A. Holland
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diff changeset
264 int wss(void) {
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David A. Holland
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diff changeset
265 count_pe_line(string_base, tis());
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diff changeset
266 fputs(string_base, pe_file);
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267 return rcs();
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David A. Holland
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diff changeset
268 }
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diff changeset
269
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diff changeset
270 int wpe(const char *fs, ...) {
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diff changeset
271 LOGSECTION("wpe");
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David A. Holland
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diff changeset
272 va_list ap;
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diff changeset
273 char buf[2000];
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David A. Holland
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diff changeset
274
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diff changeset
275 va_start(ap, fs);
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diff changeset
276 vsprintf(buf, fs, ap);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
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diff changeset
277 va_end(ap);
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David A. Holland
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diff changeset
278 return wps(buf);
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David A. Holland
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diff changeset
279 }
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David A. Holland
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diff changeset
280
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
281 void write_code_segment(const char *name) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
282 LOGSECTION("write_code_segment");
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
283 LOGV(name);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
284 if (name == NULL) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
285 return;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
286 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
287 AgString text = code_segment(name);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
288 if (!text.exists()) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
289 return;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
290 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
291 char *buf = text.pointer();
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
292 wps(buf);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
293 wps("\n\n");
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
294 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
295
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
296 static AgString expand_my_macros(const char *s) {
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David A. Holland
parents:
diff changeset
297 LOGSECTION("expand_my_macros");
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
298 char *p;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
299 int col_no = 0, lb = 0, k;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
300
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
301 LOGV(s);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
302 if (my_macros == NULL) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
303 return AgString(s);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
304 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
305 ics();
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
306 while (*s) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
307 char *word;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
308 int index;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
309
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
310 while (*s && !isalpha(*s) && *s != '_') {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
311 if (*s == '\n') {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
312 acs(*s++);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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diff changeset
313 col_no = 0;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
314 while (*s && *s == ' ') {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
315 col_no++, s++;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
316 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
317 lb = col_no;
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David A. Holland
parents:
diff changeset
318 continue;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
319 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
320 if (lb == col_no) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
321 for (k = lb; k--; ) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
322 acs(' ');
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
323 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
324 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
325 col_no++;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
326 acs(*s++);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
327 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
328 if (*s == 0) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
329 break;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
330 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
331 ics();
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
332 while (*s && (isalpha(*s) || *s == '_')) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
333 acs(*s++);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
334 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
335 word = build_string();
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
336 index = identify_string(word, my_macros);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
337 if (index == 0) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
338 if (lb == col_no) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
339 for (k = lb; k--; ) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
340 acs(' ');
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
341 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
342 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
343 col_no += strlen(word);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
344 ass(word);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
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345 DEALLOCATE(word);
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346 continue;
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347 }
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348 DEALLOCATE(word);
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349 p = my_macros_subs[index];
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350 if (*p == 0 && lb == col_no && (*s == '\n' || strncmp(s,"\\\n",2) == 0)) {
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351 if (*s == '\\') {
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352 s++;
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353 }
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354 s++;
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355 col_no = 0;
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356 while (*s && *s == ' ') {
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357 col_no++;
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358 s++;
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359 }
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360 lb = col_no;
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361 continue;
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362 }
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363 if (lb == col_no) for (k = lb; k--;) acs(' ');
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364 for (; *p; p++ ) {
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365 acs(*p);
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366 col_no++;
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367 if (*p == '\n') {
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368 for (k = lb; k--; ) {
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369 acs(' ');
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370 }
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371 col_no = lb;
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372 continue;
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373 }
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374 }
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375 if (*s == '#') {
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376 s++;
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377 }
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378 }
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379 LOGV(string_base);
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380 return buildAgString();
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381 }
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382
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383
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384 AgString code_segment(const char *name) {
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385 LOGSECTION("code_segment");
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386
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387 const char *rawtext = engdef_get(name);
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388 LOGV(rawtext);
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389
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390 AgString mx = expand_my_macros(rawtext);
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391 LOGV(mx);
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392
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393 return mx;
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394 }