Mercurial > baum

annotate baum.c @ 53:036779d5da75

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"sum" node clears its value now everytime it gets called
author meillo@marmaro.de
date Sun, 02 Mar 2008 16:32:52 +0100
parents c31b5bb6d493
children 6e46b106c334
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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16 #define VERSION "0.3"
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18
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19 void printNode(struct Node* node, int level);
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20 void printTree(struct Node* root, int level);
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21 struct Node* lastNode(struct Node* node);
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22 void delete(struct Node* node);
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23
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24
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25 struct Stackitem {
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26 struct Node* node;
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27 struct Stackitem* next;
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28 };
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32 struct Node* root = 0;
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33 struct Stackitem* stack = NULL;
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34
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35
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36 void logit(char* text) {
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37 if (option_verbose) {
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38 fprintf(stderr, "[%s]\n", text);
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39 }
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40 }
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42
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43 /* new */
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44 struct Node* newNode(char* name, unsigned char value) {
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45 struct Node* node;
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46 node = (struct Node*) malloc(sizeof(struct Node));
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47 strcpy(node->name, name);
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48 node->value = value;
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49 node->right = 0;
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50 node->down = 0;
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51 return node;
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52 }
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53
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54
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55
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56 struct Node* lastNode(struct Node* node) {
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57 while (node->right != NULL) {
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58 node = node->right;
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59 }
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60 return node;
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61 }
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62
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63 struct Node* insertLast(struct Node* node, struct Node* insert) {
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64 node = lastNode(node);
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65 node->right = insert;
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66 return insert;
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67 }
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68
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69 struct Node* copyTree(struct Node* node) {
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70 if (node == NULL) {
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71 return NULL;
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72 }
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73 struct Node* tmp;
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74 tmp = newNode(node->name, node->value);
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75 tmp->down = copyTree(node->down);
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76 tmp->right = copyTree(node->right);
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77 return tmp;
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78 }
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80
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81 /* delete */
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82 void delete(struct Node* node) {
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83 if (node == NULL) {
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84 return;
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85 }
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86 delete(node->down);
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87 delete(node->right);
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88 free(node); node=0;
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89 }
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91
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92 /* print */
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93 void printNode(struct Node* node, int level) {
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94 if (node != NULL) {
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95 while (level-- > 0) {
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96 fprintf(stderr, "\t");
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97 }
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98 fprintf(stderr, "%s (%d|%c)\n", node->name, node->value, node->value);
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99 }
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100 }
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101
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102 void printTree(struct Node* root, int level) {
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103 if (root == NULL) {
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104 return;
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105 }
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106 printNode(root, level);
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107 printTree(root->down, level+1);
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108 printTree(root->right, level);
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109 }
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110
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111
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114
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115 /* stack for read_input */
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116 void push(struct Node* node) {
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117 struct Stackitem* tmp;
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118 struct Stackitem* new;
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119 new = (struct Stackitem*) malloc(sizeof(struct Stackitem));
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120 new->node = node;
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121 tmp = stack;
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122 stack = new;
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123 stack->next = tmp;
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124 }
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125 struct Node* pull() {
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126 if (stack == NULL) {
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127 return NULL;
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128 }
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129 struct Stackitem* tmp;
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130 struct Node* node;
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131 tmp = stack;
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132 stack = stack->next;
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133 node = tmp->node;
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134 free(tmp); tmp=0;
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135 return node;
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136 }
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137
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139
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140 /* read input */
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141 void read_input(char* filename) {
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142 int c;
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143 int indent;
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144 char name[256];
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145 int value;
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146 int last_indent;
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147 struct Node* last_node;
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148 struct Node* node;
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149 FILE* file;
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150
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151 indent = 0;
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152 strcpy(name, "");
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153 value = 0;
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154 last_indent = -1;
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155 last_node = NULL;
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156 file = fopen(filename, "r");
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157
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158 while ((c = getc(file)) != EOF) {
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159 if (c == '#') { /* comment */
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160 while ((c = getc(file)) != '\n') {
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161 }
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162 }
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163
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164 if (c == ' ' || c == '\t') { /* indent if at start of line */
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165 if (strlen(name) == 0) {
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166 indent++;
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167 }
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168 }
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169
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170 if (c == '\n') { /* end of line: create node */
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171 if (strlen(name) > 0) {
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172 /* create node */
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173 node = newNode((char*) name, value);
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174 if (indent > last_indent) { /* down */
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175 /* if it goes more than one level down -> error */
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176 if (indent > last_indent + 1) {
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177 fprintf(stderr, "error: Indention over more than one level. Only indent by one!\n");
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178 exit(5);
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179 }
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180 if (last_node == NULL) {
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181 root = node;
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182 last_node = root;
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183 } else {
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184 last_node->down = node;
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185 }
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186 push(last_node);
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187 } else if (indent == last_indent) { /* right */
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188 last_node->right = node;
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189 } else if (indent < last_indent) { /* up */
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190 /* handle if it goes more than one level up */
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191 while (indent < last_indent) {
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192 last_node = pull();
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193 last_indent--;
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194 }
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195 last_node->right = node;
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196 }
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197 last_indent = indent;
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198 last_node = node;
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199 }
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200 indent = 0;
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201 strcpy(name, "");
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202 value = 0;
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203 }
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204
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205 if (c >= 'a' && c <= 'z') { /* name */
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206 int i = 1;
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207 name[0] = (char) c;
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208 while ((c = getc(file)) != '(') {
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209 name[i] = (char) c;
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210 i++;
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211 if (i > 255) {
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212 fprintf(stderr, "error: node name too long, or no value given\n");
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213 exit(6);
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214 }
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215 }
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216 name[i] = '\0';
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217 }
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218
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219 if (c == '(') { /* value */
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220 fscanf(file, "%d)", &value);
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221 }
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222
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223 }
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224
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225 /* clear stack */
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226 while (stack != NULL) {
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227 pull();
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228 }
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229
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230 fclose(file);
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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 /* main */
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236 int main(int argc, char* argv[]) {
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237 unsigned char shell_return = 0;
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238
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239 option_verbose = 0;
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240
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241 while (--argc > 0 && (*++argv)[0] == '-') {
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242 if (strcmp(argv[0], "--version") == 0) {
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243 printf("\
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244 baum %s\n\
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245 an esoteric programming language\n\
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246 by markus schnalke and julian forster\n\
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247 http://prog.marmaro.de/baum\n\
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248 ", VERSION);
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249 exit(0);
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250 } else if (strcmp(argv[0], "--help") == 0) {
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251 printf("\
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252 baum --version print version information and exit\n\
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253 baum --help print this output\n\
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254 baum [-v] <file> (verbosly) run file\n\
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255 ");
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256 exit(0);
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257 } else if (strcmp(argv[0], "-v") == 0) {
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258 option_verbose = 1;
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259 /*
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260 } else if (strcmp(argv[0], "-W") == 0) {
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261 / * TODO: catch if no value given * /
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262 iDWarn = atoi((++argv)[0]);
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263 argc--;
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264 */
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265 } else {
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266 fprintf(stderr, "unknown option: %s\n", argv[0]);
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267 exit(126);
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268 }
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269 }
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270
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271 if (argc != 1) {
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272 fprintf(stderr, "%d source files given, please specify one.\n", argc);
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273 exit(3);
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274 }
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275
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276 read_input(argv[0]);
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277
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278 if (option_verbose) {
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279 fprintf(stderr, "\n\ntree read from input:\n");
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280 printTree(root, 1);
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281 }
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282
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283 shell_return = action(root);
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diff changeset
284 fflush(stdout);
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285
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286 if (option_verbose) {
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287 fprintf(stderr, "\n\nmodified tree after execution:\n");
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288 printTree(root, 1);
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289 }
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290
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291 delete(root);
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292 exit(shell_return);
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293 }