meillo@0: /*
meillo@0:  * baum - an esoteric programming language
meillo@0:  *
meillo@0:  * (c) markus schnalke <meillo@marmaro.de>
meillo@0:  * and julian forster
meillo@0:  *
meillo@0:  */
meillo@0: 
meillo@0: 
meillo@0: #include <stdio.h>
meillo@0: #include <stdlib.h>
meillo@1: #include <string.h>
meillo@0: 
meillo@1: #include "baum.h"
meillo@0: 
meillo@54: #define VERSION "0.4"
meillo@13: 
meillo@30: 
meillo@33: void printNode(struct Node* node, int level);
meillo@33: void printTree(struct Node* root, int level);
meillo@26: struct Node* lastNode(struct Node* node);
meillo@26: void delete(struct Node* node);
meillo@26: 
meillo@26: 
meillo@41: struct Stackitem {
meillo@41: 	struct Node* node;
meillo@41: 	struct Stackitem* next;
meillo@41: };
meillo@41: 
meillo@41: 
meillo@41: 
meillo@41: struct Node* root = 0;
meillo@41: struct Stackitem* stack = NULL;
meillo@41: 
meillo@26: 
meillo@1: void logit(char* text) {
meillo@13: 	if (option_verbose) {
meillo@13: 		fprintf(stderr, "[%s]\n", text);
meillo@13: 	}
meillo@1: }
meillo@1: 
meillo@1: 
meillo@1: /* new */
meillo@3: struct Node* newNode(char* name, unsigned char value) {
meillo@0: 	struct Node* node;
meillo@0: 	node = (struct Node*) malloc(sizeof(struct Node));
meillo@55: 	if (node == NULL) {
meillo@55: 		perror("unable to allocate memory");
meillo@55: 		exit(10);
meillo@55: 	}
meillo@9: 	strcpy(node->name, name);
meillo@3: 	node->value = value;
meillo@0: 	node->right = 0;
meillo@0: 	node->down = 0;
meillo@0: 	return node;
meillo@0: }
meillo@0: 
meillo@0: 
meillo@3: 
meillo@3: struct Node* lastNode(struct Node* node) {
meillo@3: 	while (node->right != NULL) {
meillo@3: 		node = node->right;
meillo@3: 	}
meillo@3: 	return node;
meillo@3: }
meillo@3: 
meillo@15: struct Node* insertLast(struct Node* node, struct Node* insert) {
meillo@3: 	node = lastNode(node);
meillo@3: 	node->right = insert;
meillo@15: 	return insert;
meillo@3: }
meillo@3: 
meillo@46: struct Node* copyTree(struct Node* node) {
meillo@46: 	if (node == NULL) {
meillo@46: 		return NULL;
meillo@46: 	}
meillo@46: 	struct Node* tmp;
meillo@46: 	tmp = newNode(node->name, node->value);
meillo@46: 	tmp->down = copyTree(node->down);
meillo@46: 	tmp->right = copyTree(node->right);
meillo@46: 	return tmp;
meillo@46: }
meillo@46: 
meillo@26: 
meillo@1: /* delete */
meillo@1: void delete(struct Node* node) {
meillo@26: 	if (node == NULL) {
meillo@26: 		return;
meillo@0: 	}
meillo@33: 	delete(node->down);
meillo@33: 	delete(node->right);
meillo@26: 	free(node); node=0;
meillo@0: }
meillo@0: 
meillo@1: 
meillo@1: /* print */
meillo@33: void printNode(struct Node* node, int level) {
meillo@55: 	if (node == NULL) {
meillo@55: 		return;
meillo@5: 	}
meillo@55: 	while (level-- > 0) {
meillo@55: 		fprintf(stderr, "\t");
meillo@55: 	}
meillo@55: 	fprintf(stderr, "%s (%d|%c)\n", node->name, node->value, node->value);
meillo@0: }
meillo@0: 
meillo@33: void printTree(struct Node* root, int level) {
meillo@26: 	if (root == NULL) {
meillo@26: 		return;
meillo@26: 	}
meillo@33: 	printNode(root, level);
meillo@33: 	printTree(root->down, level+1);
meillo@33: 	printTree(root->right, level);
meillo@0: }
meillo@0: 
meillo@0: 
meillo@1: 
meillo@1: 
meillo@3: 
meillo@30: /* stack for read_input */
meillo@9: void push(struct Node* node) {
meillo@10: 	struct Stackitem* tmp;
meillo@10: 	struct Stackitem* new;
meillo@10: 	new = (struct Stackitem*) malloc(sizeof(struct Stackitem));
meillo@55: 	if (new == NULL) {
meillo@55: 		perror("unable to allocate memory");
meillo@55: 		exit(10);
meillo@55: 	}
meillo@9: 	new->node = node;
meillo@10: 	tmp = stack;
meillo@10: 	stack = new;
meillo@10: 	stack->next = tmp;
meillo@9: }
meillo@9: struct Node* pull() {
meillo@10: 	if (stack == NULL) {
meillo@9: 		return NULL;
meillo@9: 	}
meillo@10: 	struct Stackitem* tmp;
meillo@9: 	struct Node* node;
meillo@10: 	tmp = stack;
meillo@10: 	stack = stack->next;
meillo@9: 	node = tmp->node;
meillo@9: 	free(tmp); tmp=0;
meillo@9: 	return node;
meillo@9: }
meillo@3: 
meillo@1: 
meillo@1: 
meillo@6: /* read input */
meillo@12: void read_input(char* filename) {
meillo@7: 	int c;
meillo@8: 	int indent;
meillo@7: 	char name[256];
meillo@6: 	int value;
meillo@9: 	int last_indent;
meillo@9: 	struct Node* last_node;
meillo@9: 	struct Node* node;
meillo@12: 	FILE* file;
meillo@6: 
meillo@8: 	indent = 0;
meillo@8: 	strcpy(name, "");
meillo@8: 	value = 0;
meillo@9: 	last_indent = -1;
meillo@34: 	last_node = NULL;
meillo@12: 	file = fopen(filename, "r");
meillo@55: 	if (file == NULL) {
meillo@55: 		perror("unable to open file");
meillo@55: 		exit(10);
meillo@55: 	}
meillo@6: 
meillo@12: 	while ((c = getc(file)) != EOF) {
meillo@55: 		if (c == '#') {  /* comment */
meillo@12: 			while ((c = getc(file)) != '\n') {
meillo@7: 			}
meillo@7: 		}
meillo@7: 
meillo@8: 		if (c == ' ' || c == '\t') {  /* indent if at start of line */
meillo@8: 			if (strlen(name) == 0) {
meillo@8: 				indent++;
meillo@8: 			}
meillo@7: 		}
meillo@6: 
meillo@8: 		if (c == '\n') {  /* end of line: create node */
meillo@7: 			if (strlen(name) > 0) {
meillo@8: 				/* create node */
meillo@9: 				node = newNode((char*) name, value);
meillo@9: 				if (indent > last_indent) { /* down */
meillo@30: 					/* if it goes more than one level down -> error */
meillo@33: 					if (indent > last_indent + 1) {
meillo@30: 						fprintf(stderr, "error: Indention over more than one level. Only indent by one!\n");
meillo@31: 						exit(5);
meillo@30: 					}
meillo@34: 					if (last_node == NULL) {
meillo@34: 						root = node;
meillo@34: 						last_node = root;
meillo@34: 					} else {
meillo@34: 						last_node->down = node;
meillo@34: 					}
meillo@9: 					push(last_node);
meillo@9: 				} else if (indent == last_indent) { /* right */
meillo@9: 					last_node->right = node;
meillo@9: 				} else if (indent < last_indent) { /* up */
meillo@30: 					/* handle if it goes more than one level up */
meillo@30: 					while (indent < last_indent) {
meillo@30: 						last_node = pull();
meillo@30: 						last_indent--;
meillo@30: 					}
meillo@9: 					last_node->right = node;
meillo@9: 				}
meillo@9: 				last_indent = indent;
meillo@9: 				last_node = node;
meillo@6: 			}
meillo@6: 			indent = 0;
meillo@6: 			strcpy(name, "");
meillo@6: 			value = 0;
meillo@6: 		}
meillo@7: 
meillo@8: 		if (c >= 'a' && c <= 'z') {  /* name */
meillo@7: 			int i = 1;
meillo@7: 			name[0] = (char) c;
meillo@12: 			while ((c = getc(file)) != '(') {
meillo@7: 				name[i] = (char) c;
meillo@7: 				i++;
meillo@8: 				if (i > 255) {
meillo@33: 					fprintf(stderr, "error: node name too long, or no value given\n");
meillo@33: 					exit(6);
meillo@8: 				}
meillo@7: 			}
meillo@7: 			name[i] = '\0';
meillo@7: 		}
meillo@7: 
meillo@8: 		if (c == '(') {  /* value */
meillo@12: 			fscanf(file, "%d)", &value);
meillo@7: 		}
meillo@7: 
meillo@6: 	}
meillo@7: 
meillo@30: 	/* clear stack */
meillo@27: 	while (stack != NULL) {
meillo@27: 		pull();
meillo@27: 	}
meillo@27: 
meillo@12: 	fclose(file);
meillo@26: }
meillo@12: 
meillo@26: 
meillo@6: 
meillo@1: /* main */
meillo@0: int main(int argc, char* argv[]) {
meillo@7: 	unsigned char shell_return = 0;
meillo@38: 
meillo@38: 	option_verbose = 0;
meillo@9: 	
meillo@13: 	while (--argc > 0 && (*++argv)[0] == '-') {
meillo@13: 		if (strcmp(argv[0], "--version") == 0) {
meillo@61: 			printf("baum %s\n"
meillo@61: 			       "an esoteric programming language\n"
meillo@61: 			       "by markus schnalke and julian forster\n"
meillo@61: 			       "http://prog.marmaro.de/baum\n", VERSION);
meillo@13: 			exit(0);
meillo@13: 		} else if (strcmp(argv[0], "--help") == 0) {
meillo@61: 			printf("baum --version        print version information and exit\n"
meillo@61: 			       "baum --help           print this output\n"
meillo@61: 			       "baum [-v] <file>      (verbosly) run file\n");
meillo@13: 			exit(0);
meillo@13: 		} else if (strcmp(argv[0], "-v") == 0) {
meillo@13: 			option_verbose = 1;
meillo@13: 			/*
meillo@13: 		} else if (strcmp(argv[0], "-W") == 0) {
meillo@13: 			/ * TODO: catch if no value given * /
meillo@13: 			iDWarn = atoi((++argv)[0]);
meillo@13: 			argc--;
meillo@13: 			*/
meillo@13: 		} else {
meillo@13: 			fprintf(stderr, "unknown option: %s\n", argv[0]);
meillo@42: 			exit(126);
meillo@13: 		}
meillo@13: 	}
meillo@13: 
meillo@13: 	if (argc != 1) {
meillo@13: 		fprintf(stderr, "%d source files given, please specify one.\n", argc);
meillo@13: 		exit(3);
meillo@13: 	}
meillo@13: 
meillo@13: 	read_input(argv[0]);
meillo@13: 
meillo@13: 	if (option_verbose) {
meillo@53: 		fprintf(stderr, "\n\ntree read from input:\n");
meillo@53: 		printTree(root, 1);
meillo@13: 	}
meillo@1: 
meillo@5: 	shell_return = action(root);
meillo@34: 	fflush(stdout);
meillo@1: 
meillo@13: 	if (option_verbose) {
meillo@53: 		fprintf(stderr, "\n\nmodified tree after execution:\n");
meillo@53: 		printTree(root, 1);
meillo@13: 	}
meillo@13: 
meillo@9: 	delete(root);
meillo@5: 	exit(shell_return);
meillo@0: }