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-rw-r--r--lcc/cpp/macro.c515
1 files changed, 0 insertions, 515 deletions
diff --git a/lcc/cpp/macro.c b/lcc/cpp/macro.c
deleted file mode 100644
index 49d1129..0000000
--- a/lcc/cpp/macro.c
+++ /dev/null
@@ -1,515 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "cpp.h"
-
-/*
- * do a macro definition. tp points to the name being defined in the line
- */
-void
-dodefine(Tokenrow *trp)
-{
- Token *tp;
- Nlist *np;
- Tokenrow *def, *args;
-
- tp = trp->tp+1;
- if (tp>=trp->lp || tp->type!=NAME) {
- error(ERROR, "#defined token is not a name");
- return;
- }
- np = lookup(tp, 1);
- if (np->flag&ISUNCHANGE) {
- error(ERROR, "#defined token %t can't be redefined", tp);
- return;
- }
- /* collect arguments */
- tp += 1;
- args = NULL;
- if (tp<trp->lp && tp->type==LP && tp->wslen==0) {
- /* macro with args */
- int narg = 0;
- tp += 1;
- args = new(Tokenrow);
- maketokenrow(2, args);
- if (tp->type!=RP) {
- int err = 0;
- for (;;) {
- Token *atp;
- if (tp->type!=NAME) {
- err++;
- break;
- }
- if (narg>=args->max)
- growtokenrow(args);
- for (atp=args->bp; atp<args->lp; atp++)
- if (atp->len==tp->len
- && strncmp((char*)atp->t, (char*)tp->t, tp->len)==0)
- error(ERROR, "Duplicate macro argument");
- *args->lp++ = *tp;
- narg++;
- tp += 1;
- if (tp->type==RP)
- break;
- if (tp->type!=COMMA) {
- err++;
- break;
- }
- tp += 1;
- }
- if (err) {
- error(ERROR, "Syntax error in macro parameters");
- return;
- }
- }
- tp += 1;
- }
- trp->tp = tp;
- if (((trp->lp)-1)->type==NL)
- trp->lp -= 1;
- def = normtokenrow(trp);
- if (np->flag&ISDEFINED) {
- if (comparetokens(def, np->vp)
- || (np->ap==NULL) != (args==NULL)
- || (np->ap && comparetokens(args, np->ap)))
- error(ERROR, "Macro redefinition of %t", trp->bp+2);
- }
- if (args) {
- Tokenrow *tap;
- tap = normtokenrow(args);
- dofree(args->bp);
- args = tap;
- }
- np->ap = args;
- np->vp = def;
- np->flag |= ISDEFINED;
-}
-
-/*
- * Definition received via -D or -U
- */
-void
-doadefine(Tokenrow *trp, int type)
-{
- Nlist *np;
- static Token onetoken[1] = {{ NUMBER, 0, 0, 0, 1, (uchar*)"1" }};
- static Tokenrow onetr = { onetoken, onetoken, onetoken+1, 1 };
-
- trp->tp = trp->bp;
- if (type=='U') {
- if (trp->lp-trp->tp != 2 || trp->tp->type!=NAME)
- goto syntax;
- if ((np = lookup(trp->tp, 0)) == NULL)
- return;
- np->flag &= ~ISDEFINED;
- return;
- }
- if (trp->tp >= trp->lp || trp->tp->type!=NAME)
- goto syntax;
- np = lookup(trp->tp, 1);
- np->flag |= ISDEFINED;
- trp->tp += 1;
- if (trp->tp >= trp->lp || trp->tp->type==END) {
- np->vp = &onetr;
- return;
- }
- if (trp->tp->type!=ASGN)
- goto syntax;
- trp->tp += 1;
- if ((trp->lp-1)->type == END)
- trp->lp -= 1;
- np->vp = normtokenrow(trp);
- return;
-syntax:
- error(FATAL, "Illegal -D or -U argument %r", trp);
-}
-
-/*
- * Do macro expansion in a row of tokens.
- * Flag is NULL if more input can be gathered.
- */
-void
-expandrow(Tokenrow *trp, char *flag)
-{
- Token *tp;
- Nlist *np;
-
- if (flag)
- setsource(flag, -1, "");
- for (tp = trp->tp; tp<trp->lp; ) {
- if (tp->type!=NAME
- || quicklook(tp->t[0], tp->len>1?tp->t[1]:0)==0
- || (np = lookup(tp, 0))==NULL
- || (np->flag&(ISDEFINED|ISMAC))==0
- || (tp->hideset && checkhideset(tp->hideset, np))) {
- tp++;
- continue;
- }
- trp->tp = tp;
- if (np->val==KDEFINED) {
- tp->type = DEFINED;
- if ((tp+1)<trp->lp && (tp+1)->type==NAME)
- (tp+1)->type = NAME1;
- else if ((tp+3)<trp->lp && (tp+1)->type==LP
- && (tp+2)->type==NAME && (tp+3)->type==RP)
- (tp+2)->type = NAME1;
- else
- error(ERROR, "Incorrect syntax for `defined'");
- tp++;
- continue;
- }
- if (np->flag&ISMAC)
- builtin(trp, np->val);
- else {
- expand(trp, np);
- }
- tp = trp->tp;
- }
- if (flag)
- unsetsource();
-}
-
-/*
- * Expand the macro whose name is np, at token trp->tp, in the tokenrow.
- * Return trp->tp at the first token next to be expanded
- * (ordinarily the beginning of the expansion)
- */
-void
-expand(Tokenrow *trp, Nlist *np)
-{
- Tokenrow ntr;
- int ntokc, narg, i;
- Token *tp;
- Tokenrow *atr[NARG+1];
- int hs;
-
- copytokenrow(&ntr, np->vp); /* copy macro value */
- if (np->ap==NULL) /* parameterless */
- ntokc = 1;
- else {
- ntokc = gatherargs(trp, atr, &narg);
- if (narg<0) { /* not actually a call (no '(') */
- trp->tp++;
- return;
- }
- if (narg != rowlen(np->ap)) {
- error(ERROR, "Disagreement in number of macro arguments");
- trp->tp->hideset = newhideset(trp->tp->hideset, np);
- trp->tp += ntokc;
- return;
- }
- substargs(np, &ntr, atr); /* put args into replacement */
- for (i=0; i<narg; i++) {
- dofree(atr[i]->bp);
- dofree(atr[i]);
- }
- }
- doconcat(&ntr); /* execute ## operators */
- hs = newhideset(trp->tp->hideset, np);
- for (tp=ntr.bp; tp<ntr.lp; tp++) { /* distribute hidesets */
- if (tp->type==NAME) {
- if (tp->hideset==0)
- tp->hideset = hs;
- else
- tp->hideset = unionhideset(tp->hideset, hs);
- }
- }
- ntr.tp = ntr.bp;
- insertrow(trp, ntokc, &ntr);
- trp->tp -= rowlen(&ntr);
- dofree(ntr.bp);
- return;
-}
-
-/*
- * Gather an arglist, starting in trp with tp pointing at the macro name.
- * Return total number of tokens passed, stash number of args found.
- * trp->tp is not changed relative to the tokenrow.
- */
-int
-gatherargs(Tokenrow *trp, Tokenrow **atr, int *narg)
-{
- int parens = 1;
- int ntok = 0;
- Token *bp, *lp;
- Tokenrow ttr;
- int ntokp;
- int needspace;
-
- *narg = -1; /* means that there is no macro call */
- /* look for the ( */
- for (;;) {
- trp->tp++;
- ntok++;
- if (trp->tp >= trp->lp) {
- gettokens(trp, 0);
- if ((trp->lp-1)->type==END) {
- trp->lp -= 1;
- trp->tp -= ntok;
- return ntok;
- }
- }
- if (trp->tp->type==LP)
- break;
- if (trp->tp->type!=NL)
- return ntok;
- }
- *narg = 0;
- ntok++;
- ntokp = ntok;
- trp->tp++;
- /* search for the terminating ), possibly extending the row */
- needspace = 0;
- while (parens>0) {
- if (trp->tp >= trp->lp)
- gettokens(trp, 0);
- if (needspace) {
- needspace = 0;
- makespace(trp);
- }
- if (trp->tp->type==END) {
- trp->lp -= 1;
- trp->tp -= ntok;
- error(ERROR, "EOF in macro arglist");
- return ntok;
- }
- if (trp->tp->type==NL) {
- trp->tp += 1;
- adjustrow(trp, -1);
- trp->tp -= 1;
- makespace(trp);
- needspace = 1;
- continue;
- }
- if (trp->tp->type==LP)
- parens++;
- else if (trp->tp->type==RP)
- parens--;
- trp->tp++;
- ntok++;
- }
- trp->tp -= ntok;
- /* Now trp->tp won't move underneath us */
- lp = bp = trp->tp+ntokp;
- for (; parens>=0; lp++) {
- if (lp->type == LP) {
- parens++;
- continue;
- }
- if (lp->type==RP)
- parens--;
- if (lp->type==DSHARP)
- lp->type = DSHARP1; /* ## not special in arg */
- if ((lp->type==COMMA && parens==0) || (parens<0 && (lp-1)->type!=LP)) {
- if (*narg>=NARG-1)
- error(FATAL, "Sorry, too many macro arguments");
- ttr.bp = ttr.tp = bp;
- ttr.lp = lp;
- atr[(*narg)++] = normtokenrow(&ttr);
- bp = lp+1;
- }
- }
- return ntok;
-}
-
-/*
- * substitute the argument list into the replacement string
- * This would be simple except for ## and #
- */
-void
-substargs(Nlist *np, Tokenrow *rtr, Tokenrow **atr)
-{
- Tokenrow tatr;
- Token *tp;
- int ntok, argno;
-
- for (rtr->tp=rtr->bp; rtr->tp<rtr->lp; ) {
- if (rtr->tp->type==SHARP) { /* string operator */
- tp = rtr->tp;
- rtr->tp += 1;
- if ((argno = lookuparg(np, rtr->tp))<0) {
- error(ERROR, "# not followed by macro parameter");
- continue;
- }
- ntok = 1 + (rtr->tp - tp);
- rtr->tp = tp;
- insertrow(rtr, ntok, stringify(atr[argno]));
- continue;
- }
- if (rtr->tp->type==NAME
- && (argno = lookuparg(np, rtr->tp)) >= 0) {
- if ((rtr->tp+1)->type==DSHARP
- || (rtr->tp!=rtr->bp && (rtr->tp-1)->type==DSHARP))
- insertrow(rtr, 1, atr[argno]);
- else {
- copytokenrow(&tatr, atr[argno]);
- expandrow(&tatr, "<macro>");
- insertrow(rtr, 1, &tatr);
- dofree(tatr.bp);
- }
- continue;
- }
- rtr->tp++;
- }
-}
-
-/*
- * Evaluate the ## operators in a tokenrow
- */
-void
-doconcat(Tokenrow *trp)
-{
- Token *ltp, *ntp;
- Tokenrow ntr;
- int len;
-
- for (trp->tp=trp->bp; trp->tp<trp->lp; trp->tp++) {
- if (trp->tp->type==DSHARP1)
- trp->tp->type = DSHARP;
- else if (trp->tp->type==DSHARP) {
- char tt[128];
- ltp = trp->tp-1;
- ntp = trp->tp+1;
- if (ltp<trp->bp || ntp>=trp->lp) {
- error(ERROR, "## occurs at border of replacement");
- continue;
- }
- len = ltp->len + ntp->len;
- strncpy((char*)tt, (char*)ltp->t, ltp->len);
- strncpy((char*)tt+ltp->len, (char*)ntp->t, ntp->len);
- tt[len] = '\0';
- setsource("<##>", -1, tt);
- maketokenrow(3, &ntr);
- gettokens(&ntr, 1);
- unsetsource();
- if (ntr.lp-ntr.bp!=2 || ntr.bp->type==UNCLASS)
- error(WARNING, "Bad token %r produced by ##", &ntr);
- ntr.lp = ntr.bp+1;
- trp->tp = ltp;
- makespace(&ntr);
- insertrow(trp, (ntp-ltp)+1, &ntr);
- dofree(ntr.bp);
- trp->tp--;
- }
- }
-}
-
-/*
- * tp is a potential parameter name of macro mac;
- * look it up in mac's arglist, and if found, return the
- * corresponding index in the argname array. Return -1 if not found.
- */
-int
-lookuparg(Nlist *mac, Token *tp)
-{
- Token *ap;
-
- if (tp->type!=NAME || mac->ap==NULL)
- return -1;
- for (ap=mac->ap->bp; ap<mac->ap->lp; ap++) {
- if (ap->len==tp->len && strncmp((char*)ap->t,(char*)tp->t,ap->len)==0)
- return ap - mac->ap->bp;
- }
- return -1;
-}
-
-/*
- * Return a quoted version of the tokenrow (from # arg)
- */
-#define STRLEN 512
-Tokenrow *
-stringify(Tokenrow *vp)
-{
- static Token t = { STRING };
- static Tokenrow tr = { &t, &t, &t+1, 1 };
- Token *tp;
- uchar s[STRLEN];
- uchar *sp = s, *cp;
- int i, instring;
-
- *sp++ = '"';
- for (tp = vp->bp; tp < vp->lp; tp++) {
- instring = tp->type==STRING || tp->type==CCON;
- if (sp+2*tp->len >= &s[STRLEN-10]) {
- error(ERROR, "Stringified macro arg is too long");
- break;
- }
- if (tp->wslen && (tp->flag&XPWS)==0)
- *sp++ = ' ';
- for (i=0, cp=tp->t; i<tp->len; i++) {
- if (instring && (*cp=='"' || *cp=='\\'))
- *sp++ = '\\';
- *sp++ = *cp++;
- }
- }
- *sp++ = '"';
- *sp = '\0';
- sp = s;
- t.len = strlen((char*)sp);
- t.t = newstring(sp, t.len, 0);
- return &tr;
-}
-
-/*
- * expand a builtin name
- */
-void
-builtin(Tokenrow *trp, int biname)
-{
- char *op;
- Token *tp;
- Source *s;
-
- tp = trp->tp;
- trp->tp++;
- /* need to find the real source */
- s = cursource;
- while (s && s->fd==-1)
- s = s->next;
- if (s==NULL)
- s = cursource;
- /* most are strings */
- tp->type = STRING;
- if (tp->wslen) {
- *outp++ = ' ';
- tp->wslen = 1;
- }
- op = outp;
- *op++ = '"';
- switch (biname) {
-
- case KLINENO:
- tp->type = NUMBER;
- op = outnum(op-1, s->line);
- break;
-
- case KFILE: {
- char *src = s->filename;
- while ((*op++ = *src++) != 0)
- if (src[-1] == '\\')
- *op++ = '\\';
- op--;
- break;
- }
-
- case KDATE:
- strncpy(op, curtime+4, 7);
- strncpy(op+7, curtime+20, 4);
- op += 11;
- break;
-
- case KTIME:
- strncpy(op, curtime+11, 8);
- op += 8;
- break;
-
- default:
- error(ERROR, "cpp botch: unknown internal macro");
- return;
- }
- if (tp->type==STRING)
- *op++ = '"';
- tp->t = (uchar*)outp;
- tp->len = op - outp;
- outp = op;
-}
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