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annotate actions.c @ 25:6f2c1f9dc08f

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Added tag 0.1 for changeset 69a7cf2f0c06a5e0f0609f80c875e2ceb7ffa9c2
author meillo@marmaro.de
date Wed, 13 Feb 2008 22:04:50 +0100
parents b62288419c1c
children f0856c177403
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <string.h>
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4 #include "baum.h"
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5 #include "actions.h"
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6
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8 unsigned char action(struct Node* node) {
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9 if (node == NULL) {
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10 fprintf(stderr, "action of non existing node\n");
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11 return 0;
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12 }
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14 if (strcmp(node->name, "print") == 0) {
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15 logit("print-node");
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16 return action_print(node);
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18 } else if (strcmp(node->name, "sum") == 0) {
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19 logit("sum-node");
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20 return action_sum(node);
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22 } else if (strcmp(node->name, "number") == 0) {
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23 logit("number-node");
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24 return action_number(node);
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26 } else if (strcmp(node->name, "input") == 0) {
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27 logit("input-node");
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28 return action_input(node);
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30 } else if (strcmp(node->name, "times") == 0) {
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31 logit("times-node");
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32 return action_times(node);
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34 } else if (strcmp(node->name, "blackhole") == 0) {
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35 logit("blackhole-node");
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36 return action_blackhole(node);
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38 } else {
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39 fprintf(stderr, "unknown kind of node");
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40 exit(4);
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41 }
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42 }
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46 unsigned char action_print(struct Node* node) {
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47 unsigned char result;
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48 result = action(node->down);
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49 if (node->value == 'c') {
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50 printf("%c", result);
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51 } else {
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52 printf("%d", result);
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53 }
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54 return result;
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55 }
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58 unsigned char action_sum(struct Node* node) {
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59 struct Node* tp;
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60 tp = node->down;
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61 while (tp != NULL) {
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62 node->value += action(tp);
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63 tp = tp->right;
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64 }
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65 return node->value;
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66 }
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69 unsigned char action_number(struct Node* node) {
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70 return node->value;
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71 }
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74 unsigned char action_input(struct Node* node) {
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75 /* reads a number which is treated as ASCII value */
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76 int input;
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77 printf("input: ");
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78 scanf("%d", &input);
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79 input = input % 256;
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80 insertLast(node, newNode("number", (char) input));
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81
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82 return 0;
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83 }
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86 unsigned char action_times(struct Node* node) {
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87 struct Node* tp;
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88 struct Node* last;
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89 unsigned char i;
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90 tp = node->down;
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0e15841ae111 s/list/stack/g because thats what it is
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91 for (i = 0; i < node->value; i++) {
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92 /* deep copy */
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93 last = insertLast(node, newNode(tp->name, tp->value));
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94 if (tp->down != NULL) {
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95 last->down = newNode(tp->down->name, tp->down->value);
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96 }
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97
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98 }
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99 return 0;
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100 }
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101
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102
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103 unsigned char action_blackhole(struct Node* node) {
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104 action(node->down);
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105 return 0;
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106 }
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