initial mips32 (r2000ish mips32r6) assembler

1 files changed, 57 insertions, 0 deletions

diff --git a/masm/symtbl.c b/masm/symtbl.c
new file mode 100644
index 0000000..b75c752
--- /dev/null
+++ b/masm/symtbl.c
@@ -0,0 +1,57 @@
+#include <merror.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "parse.h"
+
+#define SYMTBL_INIT_LEN 24
+
+int symtbl_init(struct symbol_table *sym_tbl)
+{
+        sym_tbl->len = SYMTBL_INIT_LEN;
+        sym_tbl->count = 0;
+        sym_tbl->symbols = malloc(sizeof(struct symbol) * SYMTBL_INIT_LEN);
+
+        if (sym_tbl->symbols == NULL) {
+                ERROR("cannot alloc");
+                return M_ERROR;
+        }
+
+        return M_SUCCESS;
+}
+
+void symtbl_free(struct symbol_table *sym_tbl)
+{
+        free(sym_tbl->symbols);
+}
+
+int symtbl_push(struct symbol_table *sym_tbl, struct symbol sym)
+{
+        if (sym_tbl->count >= sym_tbl->len) {
+                sym_tbl->len *= 2;
+                sym_tbl->symbols = realloc(sym_tbl->symbols,
+                                        sizeof(struct symbol) * sym_tbl->len);
+                if (sym_tbl->symbols == NULL) {
+                        ERROR("cannot relloc");
+                        return M_ERROR;
+                }
+        }
+
+        sym_tbl->symbols[sym_tbl->count++] = sym;
+        return M_SUCCESS;
+}
+
+int symtbl_find(struct symbol_table *sym_tbl, struct symbol **ptr,
+                const char name[MAX_LEX_LENGTH])
+{
+        for (uint32_t i = 0; i < sym_tbl->count; i++) {
+                struct symbol *sym = &sym_tbl->symbols[i];
+                if (strcmp(sym->name, name) == 0) {
+                        if (ptr != NULL)
+                                *ptr = sym;
+                        return M_SUCCESS;
+                }
+        }
+        return M_ERROR;
+}