--- /dev/null
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "symtable.h"
+
+#if 0
+#define DD
+#endif
+
+struct symbol *tab_new(void)
+{
+ return SYMNULL;
+}
+
+struct symbol *tab_clone(struct symbol *tab)
+{
+ struct symbol *elm = tab;
+ struct symbol *ntab = tab_new();
+#ifdef DD
+ fprintf(stderr, "tab_clone: tab(%08X)\n", tab);
+#endif
+
+ while(elm != SYMNULL) {
+ ntab = tab_add_symbol(ntab, elm->ident, elm->type, 0, elm->param_index, elm->soffset);
+ elm = elm->next;
+ }
+ return ntab;
+}
+
+struct symbol *tab_add_symbol(struct symbol *tab, char *ident, short type, short check, int param_index, int soffset)
+{
+ struct symbol *elm = tab;
+ struct symbol *new_elm;
+#ifdef DD
+ fprintf(stderr, "tab_add_symbol: tab(%08X), ident(%s), type(%i), check(%i), param_index(%i), soffset(%i)\n", tab, ident, type, check, param_index, soffset);
+#endif
+
+#if 0
+ /* kann statt return -3, -4 verursachen... (z.b. codea_ag_snafu_01.3) */
+ if(param_index >= 6) {
+ fprintf(stderr, "eine methode hat zu viele parameter (max. 6 inkl. this erlaubt)\n");
+ exit(4);
+ }
+#endif
+
+ if(tab_lookup(tab, ident, type) != SYMNULL || (type == S_VAR && tab_lookup(tab, ident, S_PARM) != SYMNULL)) {
+ if(check) {
+ fprintf(stderr, "Identifier doppelt vorhanden: \"%s\"\n", ident);
+ exit(3);
+ } else {
+ tab = tab_remove_symbol(tab, ident, type);
+ }
+ }
+
+ new_elm = (struct symbol *) malloc(sizeof(struct symbol));
+ new_elm->next = SYMNULL;
+ new_elm->ident = strdup(ident);
+ new_elm->type = type;
+ new_elm->param_index = param_index;
+ new_elm->soffset = soffset;
+
+ if(tab == SYMNULL) return new_elm;
+
+ while(elm->next != SYMNULL) {
+ elm = elm->next;
+ }
+ elm->next = new_elm;
+
+ return tab;
+}
+
+struct symbol *tab_lookup(struct symbol *tab, char *ident, short type)
+{
+ struct symbol *elm = tab;
+
+ if(tab == SYMNULL) return SYMNULL;
+
+ do {
+ if((elm->type & type) && (strcmp(elm->ident, ident) == 0)) {
+ return elm;
+ }
+ elm = elm->next;
+ } while(elm != SYMNULL);
+
+ return SYMNULL;
+}
+
+struct symbol *tab_merge(struct symbol *tab, struct symbol *to_add, short check)
+{
+ struct symbol *elm = to_add;
+ struct symbol *ntab = tab_clone(tab);
+#ifdef DD
+ fprintf(stderr, "tab_merge: tab(%08X), to_add(%08X), check(%i), ntab(%08X)\n", tab, to_add, check, ntab);
+#endif
+
+ while(elm != SYMNULL) {
+ ntab = tab_add_symbol(ntab, elm->ident, elm->type, check, elm->param_index, elm->soffset);
+ elm = elm->next;
+ }
+
+ return ntab;
+}
+
+struct symbol *tab_remove_symbol(struct symbol *tab, char *ident, short type)
+{
+ struct symbol *elm = tab;
+ struct symbol *previous_elm = SYMNULL;
+
+ while(elm != SYMNULL) {
+ if((elm->type == type) && (strcmp(elm->ident, ident) == 0)) {
+ if(previous_elm == SYMNULL) {
+ tab = elm->next;
+ } else {
+ previous_elm->next = elm->next;
+ }
+ (void)free(elm->ident);
+ (void)free(elm);
+ break;
+ }
+ previous_elm = elm;
+ elm = elm->next;
+ }
+
+ return tab;
+}
+
+void check(struct symbol *tab, char *ident, short type)
+{
+ struct symbol *elm;
+#ifdef DD
+ fprintf(stderr, "check: tab(%08X), ident(%s), type(%i), elm(%08X)\n", tab, ident, type, elm);
+#endif
+
+ if(type & (S_VAR | S_PARM)) {
+ elm = tab_lookup(tab, ident, type);
+ if(elm != SYMNULL) {
+ return;
+ }
+ }
+
+ /* keine passende variable gefunden?
+ * => vllt gibt es ja ein passenden feldnamen */
+ elm = tab_lookup(tab, ident, S_FIELD);
+ if(elm == SYMNULL) {
+ fprintf(stderr, "Unbekannter Identifier: \"%s\"\n", ident);
+ exit(3);
+ }
+}
+