106 lines
2.1 KiB
C
106 lines
2.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "cpp.h"
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extern int getopt(int, char *const *, const char *);
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extern char *optarg;
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extern int optind;
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extern int verbose;
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extern int Cplusplus;
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Nlist *kwdefined;
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#define NLSIZE 128
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static Nlist *nlist[NLSIZE];
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struct kwtab {
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char *kw;
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int val;
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int flag;
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} kwtab[] = {
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"if", KIF, ISKW,
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"ifdef", KIFDEF, ISKW,
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"ifndef", KIFNDEF, ISKW,
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"elif", KELIF, ISKW,
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"else", KELSE, ISKW,
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"endif", KENDIF, ISKW,
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"include", KINCLUDE, ISKW,
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"define", KDEFINE, ISKW,
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"undef", KUNDEF, ISKW,
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"line", KLINE, ISKW,
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"error", KERROR, ISKW,
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"warning", KWARNING, ISKW, // extension to ANSI
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"pragma", KPRAGMA, ISKW,
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"eval", KEVAL, ISKW,
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"defined", KDEFINED, ISDEFINED+ISUNCHANGE,
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"ident", KPRAGMA, ISKW, /* treat like pragma (ignored) */
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"__LINE__", KLINENO, ISMAC+ISUNCHANGE,
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"__FILE__", KFILE, ISMAC+ISUNCHANGE,
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"__DATE__", KDATE, ISMAC+ISUNCHANGE,
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"__TIME__", KTIME, ISMAC+ISUNCHANGE,
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"__STDC__", KSTDC, ISMAC+ISUNCHANGE,
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NULL
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};
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unsigned long namebit[077+1];
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Nlist *np;
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void
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setup_kwtab(void)
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{
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struct kwtab *kp;
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Nlist *np;
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Token t;
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static Token deftoken[1] = {{ NAME, 0, 0, 0, 7, (uchar*)"defined" }};
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static Tokenrow deftr = { deftoken, deftoken, deftoken+1, 1 };
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for (kp=kwtab; kp->kw; kp++) {
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t.t = (uchar*)kp->kw;
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t.len = strlen(kp->kw);
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np = lookup(&t, 1);
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np->flag = kp->flag;
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np->val = kp->val;
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if (np->val == KDEFINED) {
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kwdefined = np;
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np->val = NAME;
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np->vp = &deftr;
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np->ap = 0;
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}
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}
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}
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Nlist *
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lookup(Token *tp, int install)
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{
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unsigned int h;
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Nlist *np;
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uchar *cp, *cpe;
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h = 0;
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for (cp=tp->t, cpe=cp+tp->len; cp<cpe; )
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h += *cp++;
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h %= NLSIZE;
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np = nlist[h];
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while (np) {
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if (*tp->t==*np->name && tp->len==np->len
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&& strncmp((char*)tp->t, (char*)np->name, tp->len)==0)
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return np;
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np = np->next;
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}
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if (install) {
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np = new(Nlist);
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np->vp = NULL;
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np->ap = NULL;
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np->flag = 0;
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np->val = 0;
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np->len = tp->len;
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np->name = newstring(tp->t, tp->len, 0);
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np->next = nlist[h];
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nlist[h] = np;
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quickset(tp->t[0], tp->len>1? tp->t[1]:0);
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return np;
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}
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return NULL;
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}
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