206 lines
2.9 KiB
C
206 lines
2.9 KiB
C
/* $Id$ */
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* Change IDentifiers occurring in C programs outside comment, strings
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and character constants.
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-Dname=text : replace all occerences of name by text
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-Dname : same as -Dname=
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-Ffile : read sentences of the from name=text from file
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Author: Erik Baalbergen
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Date: Oct 23, 1985
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*/
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#include <stdio.h>
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#include <string.h>
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#ifndef DEF_LENGTH
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#define DEF_LENGTH 8
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#endif
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#define LINE_LEN 1024
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#define HASHSIZE 257
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struct idf {
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struct idf *id_next;
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char *id_name;
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char *id_text;
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};
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struct idf *hash_tab[HASHSIZE];
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char *Malloc(), *Salloc();
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struct idf *FindId();
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extern char *ProgName;
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DoOption(str)
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char *str;
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{
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switch (str[1]) {
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case 'D':
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DoMacro(&str[2]);
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break;
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case 'F':
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GetMacros(&str[2]);
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break;
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default:
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fprintf(stderr, "%s: bad option \"%s\"\n", ProgName, str);
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break;
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}
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}
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/*ARGSUSED*/
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CheckId(id, len)
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char *id;
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{
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struct idf *idp = FindId(id);
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if (idp) {
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printf("%s", idp->id_text);
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}
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else {
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printf("%s", id);
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}
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}
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DoMacro(str)
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char *str;
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{
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char *id, *text;
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id = str++;
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while (*str != '\0' && *str != '=') {
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str++;
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}
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if (*str == '=') {
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*str++ = '\0';
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text = str;
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}
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else {
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text = "";
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}
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InsertMacro(id, text);
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}
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GetMacros(fn)
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char *fn;
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{
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FILE *fp;
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register c;
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char buf[LINE_LEN];
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char *bufp = &buf[0];
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if ((fp = fopen(fn, "r")) == NULL) {
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fprintf(stderr, "%s: cannot read file \"%s\"\n", ProgName, fn);
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return;
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}
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while ((c = getc(fp)) != EOF) {
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if (c == '\n' && bufp != &buf[0]) {
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*bufp = '\0';
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DoMacro(&buf[0]);
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bufp = &buf[0];
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}
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else {
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*bufp++ = c;
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}
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}
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fclose(fp);
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}
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InsertMacro(id, text)
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char *id, *text;
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{
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int hash_val = EnHash(id);
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struct idf *idp = hash_tab[hash_val];
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while (idp) {
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if (strcmp(idp->id_name, id) == 0) {
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fprintf(stderr, "%s: (warning) redefinition of %s\n",
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ProgName, id);
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break;
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}
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idp = idp->id_next;
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}
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if (idp == 0) {
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idp = (struct idf *) Malloc(sizeof(struct idf));
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}
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idp->id_next = hash_tab[hash_val];
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idp->id_name = Salloc(id);
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idp->id_text = Salloc(text);
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hash_tab[hash_val] = idp;
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}
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char *
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Malloc(n)
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unsigned n;
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{
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char *mem, *malloc();
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if ((mem = malloc(n)) == 0) {
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fprintf(stderr, "%s: out of memory\n", ProgName);
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exit(1);
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}
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return mem;
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}
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char *
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Salloc(str)
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char *str;
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{
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if (str == 0) {
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str = "";
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}
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return strcpy(Malloc((unsigned)strlen(str) + 1), str);
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}
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struct idf *
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FindId(id)
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char *id;
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{
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register hash_val = EnHash(id);
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register struct idf *idp = hash_tab[hash_val];
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while (idp) {
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if (strcmp(idp->id_name, id) == 0) {
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return idp;
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}
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idp = idp->id_next;
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}
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return 0;
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}
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EnHash(id)
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char *id;
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{
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register unsigned hash_val = 0;
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while (*id) {
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hash_val = 31 * hash_val + *id++;
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}
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return hash_val % (unsigned) HASHSIZE;
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}
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extern int GCcopy;
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BeginOfProgram()
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{
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GCcopy = 1;
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}
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EndOfProgram()
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{
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}
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