Move stuff around
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b4243755ef
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9764aff184
@ -2,6 +2,7 @@
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#include <stdlib.h>
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#include "parser.h"
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#include "syntax.h"
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#include "printtree.h"
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71
src/parser.c
71
src/parser.c
@ -3,78 +3,9 @@
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#include <stdbool.h>
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#include <ctype.h>
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#include "parser.h"
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#include "syntax.h"
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#include "extstring.h"
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struct SyntaxElement* se_create(void) {
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struct SyntaxElement* syntaxelement = malloc(sizeof(struct SyntaxElement));
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syntaxelement->type = NONE;
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syntaxelement->content = NULL;
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syntaxelement->next = NULL;
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syntaxelement->top = NULL;
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return syntaxelement;
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}
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struct SyntaxElement* se_bottom(struct SyntaxElement* syntaxelement) {
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syntaxelement->content = se_create();
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((struct SyntaxElement*)syntaxelement->content)->top = syntaxelement;
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return ((struct SyntaxElement*)syntaxelement->content);
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}
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struct SyntaxElement* se_next(struct SyntaxElement* syntaxelement) {
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syntaxelement->next = se_create();
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syntaxelement->next->top = syntaxelement->top;
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return syntaxelement->next;
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}
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void se_free(struct SyntaxElement* syntaxtree) {
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switch (syntaxtree->type) {
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case NONE:
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free(syntaxtree);
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return;
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case TREE:
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case TOPTREE:
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if (syntaxtree->content != NULL) {
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se_free((struct SyntaxElement*)syntaxtree->content);
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}
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break;
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default:
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free(syntaxtree->content);
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break;
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}
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if (syntaxtree->next != NULL) {
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se_free(syntaxtree->next);
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}
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free(syntaxtree);
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}
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// Remove NONEs from the syntax tree.
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void se_clean(struct SyntaxElement* syntaxtree) {
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if (syntaxtree->next != NULL) {
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switch (syntaxtree->next->type) {
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case NONE:
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free(syntaxtree->next);
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syntaxtree->next = NULL;
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break;
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default:
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se_clean(syntaxtree->next);
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break;
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}
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}
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if (syntaxtree->content != NULL && (syntaxtree->type == TOPTREE || syntaxtree->type == TREE)) {
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switch (((struct SyntaxElement*)syntaxtree->content)->type) {
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case NONE:
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free(syntaxtree->content);
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syntaxtree->content = NULL;
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break;
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default:
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se_clean((struct SyntaxElement*)syntaxtree->content);
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break;
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}
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}
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}
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struct SyntaxElement* parse(FILE* file) {
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struct SyntaxElement* syntaxtree = se_create();
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struct SyntaxElement* syntaxtreestart = syntaxtree;
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24
src/parser.h
24
src/parser.h
@ -1,27 +1,3 @@
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#include <stdio.h>
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#ifndef PARSER_H
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#define PARSER_H
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struct SyntaxElement* se_init(void);
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struct SyntaxElement* se_bottom(struct SyntaxElement* syntaxelement);
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struct SyntaxElement* se_next(struct SyntaxElement* syntaxelement);
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void se_free(struct SyntaxElement* syntaxtree);
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enum SyntaxElementType {
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TOPTREE,
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TREE,
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TOKEN,
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STRING,
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NUMBER,
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NONE
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};
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struct SyntaxElement {
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enum SyntaxElementType type;
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void* content;
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struct SyntaxElement* next;
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struct SyntaxElement* top;
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};
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struct SyntaxElement* parse(FILE* file);
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#endif
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@ -1,7 +1,7 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include "parser.h"
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#include "syntax.h"
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void printtree(struct SyntaxElement* syntaxtree, int depth) {
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if (syntaxtree == NULL)
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73
src/syntax.c
Normal file
73
src/syntax.c
Normal file
@ -0,0 +1,73 @@
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#include <stdlib.h>
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#include "syntax.h"
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struct SyntaxElement* se_create(void) {
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struct SyntaxElement* syntaxelement = malloc(sizeof(struct SyntaxElement));
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syntaxelement->type = NONE;
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syntaxelement->content = NULL;
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syntaxelement->next = NULL;
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syntaxelement->top = NULL;
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return syntaxelement;
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}
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struct SyntaxElement* se_bottom(struct SyntaxElement* syntaxelement) {
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syntaxelement->content = se_create();
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((struct SyntaxElement*)syntaxelement->content)->top = syntaxelement;
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return ((struct SyntaxElement*)syntaxelement->content);
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}
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struct SyntaxElement* se_next(struct SyntaxElement* syntaxelement) {
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syntaxelement->next = se_create();
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syntaxelement->next->top = syntaxelement->top;
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return syntaxelement->next;
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}
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void se_free(struct SyntaxElement* syntaxtree) {
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switch (syntaxtree->type) {
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case NONE:
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free(syntaxtree);
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return;
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case TREE:
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case TOPTREE:
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if (syntaxtree->content != NULL) {
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se_free((struct SyntaxElement*)syntaxtree->content);
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}
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break;
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default:
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free(syntaxtree->content);
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break;
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}
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if (syntaxtree->next != NULL) {
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se_free(syntaxtree->next);
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}
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free(syntaxtree);
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}
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// Remove NONEs from the syntax tree.
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void se_clean(struct SyntaxElement* syntaxtree) {
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if (syntaxtree->next != NULL) {
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switch (syntaxtree->next->type) {
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case NONE:
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free(syntaxtree->next);
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syntaxtree->next = NULL;
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break;
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default:
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se_clean(syntaxtree->next);
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break;
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}
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}
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if (syntaxtree->content != NULL && (syntaxtree->type == TOPTREE || syntaxtree->type == TREE)) {
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switch (((struct SyntaxElement*)syntaxtree->content)->type) {
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case NONE:
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free(syntaxtree->content);
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syntaxtree->content = NULL;
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break;
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default:
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se_clean((struct SyntaxElement*)syntaxtree->content);
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break;
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}
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}
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}
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25
src/syntax.h
Normal file
25
src/syntax.h
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@ -0,0 +1,25 @@
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#ifndef SYNTAX_H
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#define SYNTAX_H
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enum SyntaxElementType {
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TOPTREE,
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TREE,
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TOKEN,
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STRING,
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NUMBER,
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NONE
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};
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struct SyntaxElement {
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enum SyntaxElementType type;
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void* content;
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struct SyntaxElement* next;
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struct SyntaxElement* top;
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};
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void se_clean(struct SyntaxElement* syntaxtree);
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struct SyntaxElement* se_create(void);
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struct SyntaxElement* se_init(void);
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struct SyntaxElement* se_bottom(struct SyntaxElement* syntaxelement);
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struct SyntaxElement* se_next(struct SyntaxElement* syntaxelement);
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void se_free(struct SyntaxElement* syntaxtree);
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#endif
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