Mercurial > baum

annotate baum.c @ 16:b62288419c1c

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added README and LICENSE; changed error code of invalid node
author meillo@marmaro.de
date Wed, 13 Feb 2008 20:33:39 +0100
parents e2048e569891
children f0856c177403
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1 /*
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2 * baum - an esoteric programming language
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3 *
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4 * (c) markus schnalke <meillo@marmaro.de>
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5 * and julian forster
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6 *
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7 */
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8
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9
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12 #include <string.h>
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13
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14 #include "baum.h"
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15 #include "actions.h"
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16
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17 #define VERSION "0.1"
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18
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19 int option_check = 0;
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20 int option_verbose = 0;
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21
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22 struct Node* root = 0;
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23 struct Stackitem* stack = NULL;
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24
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26 void logit(char* text) {
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27 if (option_verbose) {
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28 fprintf(stderr, "[%s]\n", text);
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29 }
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30 }
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32
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33 /* new */
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34 struct Node* newNode(char* name, unsigned char value) {
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35 struct Node* node;
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36 node = (struct Node*) malloc(sizeof(struct Node));
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37 strcpy(node->name, name);
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38 node->value = value;
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39 node->right = 0;
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40 node->down = 0;
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41 return node;
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42 }
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43
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44
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45 void setValue(struct Node* node, unsigned char value) {
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46 node->value = value;
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47 }
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49
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50 struct Node* nextNode(struct Node* node) {
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51 return node->right;
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52 }
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53
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54 struct Node* lastNode(struct Node* node) {
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55 while (node->right != NULL) {
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56 node = node->right;
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57 }
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58 return node;
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59 }
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60
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61 struct Node* insertLast(struct Node* node, struct Node* insert) {
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62 node = lastNode(node);
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63 node->right = insert;
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64 return insert;
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65 }
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66
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67 /* delete */
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68 void delete(struct Node* node) {
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69 if (node != NULL) {
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70 if (node->down != NULL) {
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71 delete(node->down);
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72 }
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73 if (node->right != NULL) {
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74 delete(node->right);
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75 }
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76 free(node); node=0;
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77 }
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78 }
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81 /* print */
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82 void printNode(struct Node* node) {
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83 if (node != NULL) {
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84 fprintf(stderr, "Node: %10s (%d|%c)\n", node->name, node->value, node->value);
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85 }
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86 }
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87
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88 void printTree(struct Node* root) {
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89 if (root != NULL) {
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90 printNode(root);
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91 fprintf(stderr, " down: ");
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92 if (root->down != NULL) {
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93 printTree(root->down);
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94 } else {
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95 fprintf(stderr, "NULL\n");
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96 }
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97 fprintf(stderr, " right: ");
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98 if (root->right != NULL) {
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99 printTree(root->right);
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100 } else {
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101 fprintf(stderr, "NULL\n");
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102 }
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103 }
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104 }
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105
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106
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107
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108 /* traverse */
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109 void traverse(struct Node* root) {
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110 /* each node controlls the nodes below itself */
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111 action(root);
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112 }
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113
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114
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115
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116
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117 void push(struct Node* node) {
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118 struct Stackitem* tmp;
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119 struct Stackitem* new;
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120 new = (struct Stackitem*) malloc(sizeof(struct Stackitem));
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121 new->node = node;
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122 tmp = stack;
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123 stack = new;
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124 stack->next = tmp;
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125 }
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126 struct Node* pull() {
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127 if (stack == NULL) {
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128 return NULL;
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129 }
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130 struct Stackitem* tmp;
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131 struct Node* node;
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132 tmp = stack;
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133 stack = stack->next;
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134 node = tmp->node;
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135 free(tmp); tmp=0;
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136 return node;
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137 }
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138
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139
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140
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141 /* read input */
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142 void read_input(char* filename) {
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143 int c;
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144 int indent;
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145 char name[256];
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146 int value;
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147 int last_indent;
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148 struct Node* last_node;
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149 struct Node* node;
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150 FILE* file;
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151
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152 indent = 0;
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153 strcpy(name, "");
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154 value = 0;
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155 last_indent = -1;
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156 root = newNode("blackhole", 0);
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157 last_node = root;
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158 file = fopen(filename, "r");
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159
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160 while ((c = getc(file)) != EOF) {
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161 if (c == '#') { /* comment */
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162 while ((c = getc(file)) != '\n') {
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163 }
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164 }
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165
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166 if (c == ' ' || c == '\t') { /* indent if at start of line */
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167 if (strlen(name) == 0) {
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168 indent++;
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169 }
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170 }
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171
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172 if (c == '\n') { /* end of line: create node */
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173 if (strlen(name) > 0) {
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174 if (option_verbose) {
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175 fprintf(stderr, " %d - %s - %d\n", indent, name, value);
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176 }
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177 /* create node */
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178 node = newNode((char*) name, value);
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179 if (indent > last_indent) { /* down */
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180 last_node->down = node;
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181 push(last_node);
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182 } else if (indent == last_indent) { /* right */
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183 last_node->right = node;
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184 } else if (indent < last_indent) { /* up */
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185 /* FIXME what if it goes more than one level up? */
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186 last_node = pull();
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187 last_node->right = node;
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188 }
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189 last_indent = indent;
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190 last_node = node;
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191 }
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192 indent = 0;
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193 strcpy(name, "");
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194 value = 0;
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195 }
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196
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197 if (c >= 'a' && c <= 'z') { /* name */
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198 int i = 1;
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199 name[0] = (char) c;
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200 while ((c = getc(file)) != '(') {
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201 name[i] = (char) c;
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202 i++;
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203 if (i > 255) {
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204 break;
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205 }
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206 }
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207 name[i] = '\0';
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208 }
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209
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210 if (c == '(') { /* value */
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211 fscanf(file, "%d)", &value);
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212 }
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213
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214 }
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215
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216 fclose(file);
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217
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218 }
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219
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220 /* main */
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221 int main(int argc, char* argv[]) {
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222 unsigned char shell_return = 0;
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223
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224 while (--argc > 0 && (*++argv)[0] == '-') {
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225 if (strcmp(argv[0], "--version") == 0) {
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226 printf("baum %s\n\
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227 an esoteric programming language\n\
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228 by markus schnalke and julian forster\n\
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229 http://prog.marmaro.de/baum\n", VERSION);
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230 exit(0);
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231 } else if (strcmp(argv[0], "--help") == 0) {
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232 printf("\
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233 baum --version print version information and exit\n\
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234 baum --help print this output\n\
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235 baum [-v] -c <file> (verbosly) check file and return 1 if invalid\n\
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236 baum [-v] <file> (verbosly) run file\n\
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237 ");
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238 exit(0);
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239 } else if (strcmp(argv[0], "-c") == 0) {
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240 option_check = 1;
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241 } else if (strcmp(argv[0], "-v") == 0) {
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242 option_verbose = 1;
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243 /*
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244 } else if (strcmp(argv[0], "-W") == 0) {
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245 / * TODO: catch if no value given * /
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246 iDWarn = atoi((++argv)[0]);
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247 argc--;
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248 */
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249 } else {
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250 fprintf(stderr, "unknown option: %s\n", argv[0]);
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251 exit(127);
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252 }
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253 }
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254
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255 if (argc != 1) {
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256 fprintf(stderr, "%d source files given, please specify one.\n", argc);
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257 exit(3);
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258 }
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259
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260 read_input(argv[0]);
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261
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262 if (option_verbose) {
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263 printTree(root);
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264 }
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265
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266 shell_return = action(root);
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267
13
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268 if (option_verbose) {
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269 printTree(root);
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270 }
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271
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272 delete(root);
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273 exit(shell_return);
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274 }