symtab.c
资源名称:nasm-0.98.zip [点击查看]
上传用户:yuppie_zhu
上传日期:2007-01-08
资源大小:535k
文件大小:3k
源码类别:
编译器/解释器
开发平台:
C/C++
- /* symtab.c Routines to maintain and manipulate a symbol table
- *
- * These routines donated to the NASM effort by Graeme Defty.
- *
- * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
- * Julian Hall. All rights reserved. The software is
- * redistributable under the licence given in the file "Licence"
- * distributed in the NASM archive.
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <malloc.h>
- #include "symtab.h"
- #include "hash.h"
- #define SYMTABSIZE 64
- #define slotnum(x) (hash((x)) % SYMTABSIZE)
- /* ------------------------------------- */
- /* Private data types */
- typedef struct tagSymtabNode {
- struct tagSymtabNode * next;
- symtabEnt ent;
- } symtabNode;
- typedef symtabNode *(symtabTab[SYMTABSIZE]);
- typedef symtabTab *symtab;
- /* ------------------------------------- */
- void *
- symtabNew(void)
- {
- symtab mytab;
- mytab = (symtabTab *) calloc(SYMTABSIZE ,sizeof(symtabNode *));
- if (mytab == NULL) {
- fprintf(stderr,"symtab: out of memoryn");
- exit(3);
- }
- return mytab;
- }
- /* ------------------------------------- */
- void
- symtabDone(void *stab)
- {
- symtab mytab = (symtab)stab;
- int i;
- symtabNode *this, *next;
- for (i=0; i < SYMTABSIZE; ++i) {
- for (this = (*mytab)[i]; this; this=next)
- { next = this->next; free (this); }
- }
- free (*mytab);
- }
- /* ------------------------------------- */
- void
- symtabInsert(void *stab, symtabEnt *ent)
- {
- symtab mytab = (symtab) stab;
- symtabNode *node;
- int slot;
- node = malloc(sizeof(symtabNode));
- if (node == NULL) {
- fprintf(stderr,"symtab: out of memoryn");
- exit(3);
- }
- slot = slotnum(ent->name);
- node->ent = *ent;
- node->next = (*mytab)[slot];
- (*mytab)[slot] = node;
- }
- /* ------------------------------------- */
- symtabEnt *
- symtabFind(void *stab, const char *name)
- {
- symtab mytab = (symtab) stab;
- int slot = slotnum(name);
- symtabNode *node = (*mytab)[slot];
- while (node) {
- if (!strcmp(node->ent.name,name)) {
- return &(node->ent);
- }
- node = node->next;
- }
- return NULL;
- }
- /* ------------------------------------- */
- void
- symtabDump(void *stab, FILE* of)
- {
- symtab mytab = (symtab)stab;
- int i;
- fprintf(of, "Symbol table is ...n");
- for (i=0; i < SYMTABSIZE; ++i) {
- symtabNode *l = (symtabNode *)(*mytab)[i];
- if (l) {
- fprintf(of, " ... slot %d ...n", i);
- }
- while(l) {
- fprintf(of, "%-32s %s:%08lx (%ld)n",l->ent.name,
- l->ent.segment ? "data" : "code" ,
- l->ent.offset, l->ent.flags);
- l = l->next;
- }
- }
- fprintf(of, "........... end of Symbol table.n");
- }