void process(Tokenrow *trp)
{
int anymacros = 0;
for (;;)
{
if (trp->tp >= trp->lp)
{
trp->tp = trp->lp = trp->bp;
outbufp = outbuf;
anymacros |= gettokens(trp, 1);
trp->tp = trp->bp;
}
if (trp->tp->type == END)
{
if (--incdepth >= 0)
{
if (cursource->ifdepth)
error(ERROR, "Unterminated conditional in #include");
unsetsource();
cursource->line += cursource->lineinc;
trp->tp = trp->lp;
genline();
continue;
}
if (ifdepth)
error(ERROR, "Unterminated #if/#ifdef/#ifndef");
break;
}
if (trp->tp->type == SHARP)
{
trp->tp += 1;
control(trp);
}
else if (!skipping && anymacros)
expandrow(trp, NULL);
if (skipping)
setempty(trp);
puttokens(trp);
anymacros = 0;
cursource->line += cursource->lineinc;
if (cursource->lineinc > 1)
{
genline();
}
}
}
/*
* 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();
}
/**
* process - 处理c源程序的总函数
* @trp: 用来存储c源程序中的一行Token
*/
void process(Tokenrow *trp) {
int anymacros = 0;
for (;;) {
if (trp->tp >= trp->lp) { /* 如果当前token row中没有有效数据 */
trp->tp = trp->lp = trp->bp; /* 重置token row的当前token指针 */
outp = outbuf; /* 重置输出缓冲区的当前指针 */
anymacros |= gettokens(trp, 1); /* 得到一行Token */
trp->tp = trp->bp;
}
if (trp->tp->type == END) { /* 如果遇到EOFC结束符 */
if (--incdepth >= 0) {
if (cursource->ifdepth)
error(ERROR,"Unterminated conditional in #include");
unsetsource();
cursource->line += cursource->lineinc;
trp->tp = trp->lp;
genline();
continue;
}
if (ifdepth)
error(ERROR, "Unterminated #if/#ifdef/#ifndef");
break;
}
if (trp->tp->type==SHARP) { /* 如果当前Token是'#'字符 */
trp->tp += 1; /* tp移动到token row中的下一个token */
control(trp); /* 处理预处理指令部分（宏定义，条件编译，头文件包含） */
} else if (!skipping && anymacros)
expandrow(trp, NULL);
if (skipping) /* 如果当前是忽略状态 */
setempty(trp); /* 置空当前行 */
puttokens(trp); /* 输出当前行 */
anymacros = 0;
cursource->line += cursource->lineinc;
if (cursource->lineinc>1) {
genline();
}
}
}
/*
* Evaluate the ## operators in a tokenrow
*/
void
doconcat(Tokenrow *trp)
{
Token *ltp, *ntp;
STATIC Tokenrow ntr;
int len;
CHECKIN();
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) {
STATIC 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--;
}
}
CHECKOUT();
}
void
setup(int argc, char **argv)
{
int c, fd, i;
char *fp, *dp;
Tokenrow tr;
extern void setup_kwtab(void);
setup_kwtab();
while ((c = getopt(argc, argv, "MNOVv+I:D:U:F:lg")) != -1)
switch (c) {
case 'N':
for (i=0; i<NINCLUDE; i++)
if (includelist[i].always==1)
includelist[i].deleted = 1;
break;
case 'I':
for (i=NINCLUDE-2; i>=0; i--) {
if (includelist[i].file==NULL) {
includelist[i].always = 1;
includelist[i].file = optarg;
break;
}
}
if (i<0)
error(FATAL, "Too many -I directives");
break;
case 'D':
case 'U':
setsource("<cmdarg>", -1, optarg);
maketokenrow(3, &tr);
gettokens(&tr, 1);
doadefine(&tr, c);
unsetsource();
break;
case 'M':
Mflag++;
break;
case 'v':
fprintf(stderr, "%s %s\n", argv[0], rcsid);
break;
case 'V':
verbose++;
break;
case '+':
Cplusplus++;
break;
default:
break;
}
dp = ".";
fp = "<stdin>";
fd = 0;
if (optind<argc) {
if ((fp = strrchr(argv[optind], '/')) != NULL) {
int len = fp - argv[optind];
dp = (char*)newstring((uchar*)argv[optind], len+1, 0);
dp[len] = '\0';
}
fp = (char*)newstring((uchar*)argv[optind], strlen(argv[optind]), 0);
if ((fd = open(fp, 0)) <= 0)
error(FATAL, "Can't open input file %s", fp);
}
if (optind+1<argc) {
int fdo = creat(argv[optind+1], 0666);
if (fdo<0)
error(FATAL, "Can't open output file %s", argv[optind+1]);
dup2(fdo, 1);
}
if(Mflag)
setobjname(fp);
includelist[NINCLUDE-1].always = 0;
includelist[NINCLUDE-1].file = dp;
setsource(fp, fd, NULL);
}
/*
* Evaluate the ## operators in a tokenrow
*/
void
doconcat(Tokenrow * trp)
{
Token *ltp, *ntp;
Tokenrow ntr;
size_t 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)
{
int i;
char tt[NCONCAT];
ltp = trp->tp - 1;
ntp = trp->tp + 1;
if (ltp < trp->bp || ntp >= trp->lp)
{
error(ERROR, "## occurs at border of replacement");
continue;
}
ntp = ltp;
i = 1;
len = 0;
do
{
if (len + ntp->len + ntp->wslen > sizeof(tt))
{
error(ERROR, "## string concatination buffer overrun");
break;
}
if (ntp != trp->tp + 1)
{
strncpy((char *) tt + len, (char *) ntp->t - ntp->wslen,
ntp->len + ntp->wslen);
len += ntp->len + ntp->wslen;
}
else // Leerzeichen um ## herum entfernen:
{
strncpy((char *) tt + len, (char *) ntp->t, ntp->len);
len += ntp->len;
}
ntp = trp->tp + i;
i++;
}
while (ntp < trp->lp);
tt[len] = '\0';
setsource("<##>", -1, -1, tt, 0);
maketokenrow(3, &ntr);
gettokens(&ntr, 1);
unsetsource();
if (ntr.bp->type == UNCLASS)
error(WARNING, "Bad token %r produced by ##", &ntr);
while ((ntr.lp-1)->len == 0 && ntr.lp != ntr.bp)
ntr.lp--;
doconcat(&ntr);
trp->tp = ltp;
makespace(&ntr, ltp);
insertrow(trp, (int)(ntp - ltp), &ntr);
dofree(ntr.bp);
trp->tp--;
}
}
}
/*
* 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;
MacroValidatorList validators;
mvl_init(&validators);
/* Sets all token-identifiers to 0 because tokens may not be initialised (never use C!) */
tokenrow_zeroTokenIdentifiers(trp);
if (flag)
setsource(flag, -1, -1, "", 0);
for (tp = trp->tp; tp < trp->lp;)
{
mvl_check(&validators, tp);
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
|| (np->flag & ISACTIVE) != 0)
{
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;
}
else
if (np->val == KMACHINE)
{
if (((tp - 1) >= trp->bp) && ((tp - 1)->type == SHARP))
{
tp->type = ARCHITECTURE;
if ((tp + 1) < trp->lp && (tp + 1)->type == NAME)
(tp + 1)->type = NAME2;
else
if ((tp + 3) < trp->lp && (tp + 1)->type == LP
&& (tp + 2)->type == NAME && (tp + 3)->type == RP)
(tp + 2)->type = NAME2;
else
error(ERROR, "Incorrect syntax for `#machine'");
}
tp++;
continue;
}
if (np->flag & ISMAC)
builtin(trp, np->val);
else
expand(trp, np, &validators);
tp = trp->tp;
} // end for
if (flag)
unsetsource();
mvl_destruct(&validators);
}
void
setup(int argc, char **argv)
{
int c, fd, i, n;
char *fp, *dp;
Tokenrow tr;
setup_kwtab();
#if defined(MACOSX) || defined(AIX) || defined(_WIN32)
while ((c = stgetopt(argc, argv, "NOPV:I:D:U:F:A:X:u:l:+")) != -1)
#else
while ((c = getopt(argc, argv, "NOPV:I:D:U:F:A:X:u:l:+")) != -1)
#endif
switch (c)
{
case 'N':
for (i = 0; i < NINCLUDE; i++)
if (includelist[i].always == 1)
includelist[i].deleted = 1;
break;
case 'I':
for (i = NINCLUDE - 2; i >= 0; i--)
{
if (includelist[i].file == NULL)
{
includelist[i].always = 1;
includelist[i].file = optarg;
break;
}
}
if (i < 0)
error(FATAL, "Too many -I directives");
break;
case 'D':
case 'U':
case 'A':
setsource("<cmdarg>", -1, -1, optarg, 0);
maketokenrow(3, &tr);
gettokens(&tr, 1);
doadefine(&tr, c);
dofree(tr.bp);
unsetsource();
break;
case 'P': /* Lineinfo */
Pflag++;
break;
case 'V':
for (n = 0; (c = optarg[n]) != '\0'; n++)
switch (c)
{
case 'i':
Iflag++;
break;
case 'm':
Mflag = 1;
break;
case 'x':
Mflag = 2;
break;
case 't':
Vflag++;
break;
case 'v':
fprintf(stderr, "%s\n", argv[0]);
break;
default:
error(WARNING, "Unknown verbose option %c", c);
}
break;
case 'X':
for (n = 0; (c = optarg[n]) != '\0'; n++)
switch (c)
{
case 'a':
Aflag++;
break;
case 'i':
Xflag++;
break;
case 'c':
Cflag++;
break;
case 'd':
Dflag++;
break;
case 'w':
dp = &optarg[n + 1];
n += (int)strlen(dp);
while (isspace(*dp)) dp++;
for (i = NINCLUDE - 1; i >= 0; i--)
{
if (wraplist[i].file == NULL)
{
wraplist[i].file = dp;
break;
}
}
if (i < 0)
error(WARNING, "Too many -Xw directives");
break;
default:
error(WARNING, "Unknown extension option %c", c);
}
break;
case '+':
Cplusplus++;
break;
case 'u': /* -undef fuer GCC (dummy) */
case 'l': /* -lang-c++ fuer GCC (dummy) */
break;
default:
break;
}
dp = ".";
fp = "<stdin>";
fd = 0;
if (optind < argc)
{
if ((fp = strrchr(argv[optind], '/')) != NULL)
{
int len = (int)(fp - argv[optind]);
dp = (char *) newstring((uchar *) argv[optind], len + 1, 0);
dp[len] = '\0';
}
fp = (char *) newstring((uchar *) argv[optind], strlen(argv[optind]), 0);
if ((fd = open(fp, O_RDONLY)) <= 0)
error(FATAL, "Can't open input file %s", fp);
}
if (optind + 1 < argc)
{
int fdo = creat(argv[optind + 1], 0666);
if (fdo < 0)
error(FATAL, "Can't open output file %s", argv[optind + 1]);
dup2(fdo, 1);
}
includelist[NINCLUDE - 1].always = 0;
includelist[NINCLUDE - 1].file = dp;
setsource(fp, -1, fd, NULL, 0);
}
