arm64: init from arm

[uebersetzerbau-ss10.git] / gesamt_arm64 / symtable.c

diff --git a/gesamt_arm64/symtable.c b/gesamt_arm64/symtable.c
new file mode 100644 (file)
index 0000000..89db8c0
--- /dev/null
+++ b/gesamt_arm64/symtable.c
@@ -0,0 +1,149 @@
+#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);
+       }
+}
+