Mercurial > baum

annotate baum.c @ 38:ff01f0f076e4

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option_verbose is now global; stuff about warning when (expected) nodes are not there
author meillo@marmaro.de
date Sat, 01 Mar 2008 20:04:08 +0100
parents 29172b6e802a
children 5c13e29bc6fd
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 #include "actions.h"
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16
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17 #define VERSION "0.3"
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19
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20 struct Node* root = 0;
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21 struct Stackitem* stack = NULL;
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22
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23
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24 void printNode(struct Node* node, int level);
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25 void printTree(struct Node* root, int level);
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26 struct Node* lastNode(struct Node* node);
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27 void delete(struct Node* node);
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31 void logit(char* text) {
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32 if (option_verbose) {
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33 fprintf(stderr, "[%s]\n", text);
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34 }
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35 }
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38 /* new */
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39 struct Node* newNode(char* name, unsigned char value) {
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40 struct Node* node;
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41 node = (struct Node*) malloc(sizeof(struct Node));
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42 strcpy(node->name, name);
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43 node->value = value;
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44 node->right = 0;
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45 node->down = 0;
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46 return node;
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47 }
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48
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49
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50
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51 struct Node* lastNode(struct Node* node) {
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52 while (node->right != NULL) {
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53 node = node->right;
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54 }
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55 return node;
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56 }
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57
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58 struct Node* insertLast(struct Node* node, struct Node* insert) {
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59 node = lastNode(node);
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60 node->right = insert;
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61 return insert;
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62 }
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63
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64
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65 /* delete */
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66 void delete(struct Node* node) {
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67 if (node == NULL) {
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68 return;
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69 }
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70 delete(node->down);
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71 delete(node->right);
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72 free(node); node=0;
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73 }
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76 /* print */
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77 void printNode(struct Node* node, int level) {
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78 if (node != NULL) {
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79 while (level-- > 0) {
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80 fprintf(stderr, "\t");
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81 }
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82 fprintf(stderr, "%s (%d|%c)\n", node->name, node->value, node->value);
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83 }
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84 }
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85
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86 void printTree(struct Node* root, int level) {
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87 if (root == NULL) {
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88 return;
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89 }
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90 printNode(root, level);
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91 printTree(root->down, level+1);
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92 printTree(root->right, level);
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93 }
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98
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99 /* stack for read_input */
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100 void push(struct Node* node) {
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101 struct Stackitem* tmp;
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102 struct Stackitem* new;
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103 new = (struct Stackitem*) malloc(sizeof(struct Stackitem));
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104 new->node = node;
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105 tmp = stack;
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106 stack = new;
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107 stack->next = tmp;
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108 }
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109 struct Node* pull() {
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110 if (stack == NULL) {
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111 return NULL;
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112 }
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113 struct Stackitem* tmp;
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114 struct Node* node;
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115 tmp = stack;
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116 stack = stack->next;
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117 node = tmp->node;
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118 free(tmp); tmp=0;
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119 return node;
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120 }
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121
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123
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124 /* read input */
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125 void read_input(char* filename) {
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126 int c;
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127 int indent;
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128 char name[256];
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129 int value;
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130 int last_indent;
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131 struct Node* last_node;
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132 struct Node* node;
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133 FILE* file;
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134
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135 indent = 0;
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136 strcpy(name, "");
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137 value = 0;
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138 last_indent = -1;
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139 last_node = NULL;
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140 file = fopen(filename, "r");
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141
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142 while ((c = getc(file)) != EOF) {
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143 if (c == '#') { /* comment */
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144 while ((c = getc(file)) != '\n') {
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145 }
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146 }
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147
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148 if (c == ' ' || c == '\t') { /* indent if at start of line */
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149 if (strlen(name) == 0) {
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150 indent++;
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151 }
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152 }
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153
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154 if (c == '\n') { /* end of line: create node */
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155 if (strlen(name) > 0) {
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156 if (option_verbose) {
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157 fprintf(stderr, " %d - %s - %d\n", indent, name, value);
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158 }
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159 /* create node */
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160 node = newNode((char*) name, value);
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161 if (indent > last_indent) { /* down */
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162 /* if it goes more than one level down -> error */
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163 if (indent > last_indent + 1) {
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164 fprintf(stderr, "error: Indention over more than one level. Only indent by one!\n");
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165 exit(5);
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166 }
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167 if (last_node == NULL) {
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168 root = node;
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169 last_node = root;
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170 } else {
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171 last_node->down = node;
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172 }
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173 push(last_node);
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174 } else if (indent == last_indent) { /* right */
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175 last_node->right = node;
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176 } else if (indent < last_indent) { /* up */
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177 /* handle if it goes more than one level up */
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178 while (indent < last_indent) {
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179 last_node = pull();
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180 last_indent--;
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181 }
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182 last_node->right = node;
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183 }
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184 last_indent = indent;
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185 last_node = node;
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186 }
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187 indent = 0;
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188 strcpy(name, "");
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189 value = 0;
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190 }
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191
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192 if (c >= 'a' && c <= 'z') { /* name */
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193 int i = 1;
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194 name[0] = (char) c;
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195 while ((c = getc(file)) != '(') {
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196 name[i] = (char) c;
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197 i++;
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198 if (i > 255) {
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199 fprintf(stderr, "error: node name too long, or no value given\n");
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200 exit(6);
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201 }
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202 }
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203 name[i] = '\0';
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204 }
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205
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206 if (c == '(') { /* value */
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207 fscanf(file, "%d)", &value);
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208 }
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209
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210 }
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211
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212 /* clear stack */
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213 while (stack != NULL) {
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214 pull();
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215 }
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216
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217 fclose(file);
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218 }
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219
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220
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221
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222 /* main */
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223 int main(int argc, char* argv[]) {
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224 unsigned char shell_return = 0;
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225
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226 option_verbose = 0;
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227
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228 while (--argc > 0 && (*++argv)[0] == '-') {
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229 if (strcmp(argv[0], "--version") == 0) {
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230 printf("\
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231 baum %s\n\
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232 an esoteric programming language\n\
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233 by markus schnalke and julian forster\n\
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234 http://prog.marmaro.de/baum\n\
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235 ", VERSION);
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236 exit(0);
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237 } else if (strcmp(argv[0], "--help") == 0) {
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238 printf("\
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239 baum --version print version information and exit\n\
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240 baum --help print this output\n\
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241 baum [-v] <file> (verbosly) run file\n\
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242 ");
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243 exit(0);
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244 } else if (strcmp(argv[0], "-v") == 0) {
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245 option_verbose = 1;
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246 /*
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247 } else if (strcmp(argv[0], "-W") == 0) {
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248 / * TODO: catch if no value given * /
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249 iDWarn = atoi((++argv)[0]);
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250 argc--;
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251 */
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252 } else {
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253 fprintf(stderr, "unknown option: %s\n", argv[0]);
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254 exit(127);
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255 }
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256 }
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257
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258 if (argc != 1) {
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259 fprintf(stderr, "%d source files given, please specify one.\n", argc);
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260 exit(3);
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261 }
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262
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263 read_input(argv[0]);
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264
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265 if (option_verbose) {
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266 printTree(root, 0);
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267 }
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268
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269 shell_return = action(root);
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270 fflush(stdout);
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271
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272 if (option_verbose) {
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273 printTree(root, 0);
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274 }
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275
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276 delete(root);
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277 exit(shell_return);
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278 }