ref: e969575d2e55eec89d3a2765b974e023123d8fa5
dir: /sys/src/cmd/cc/lex.c/
#include "cc.h"
#include "y.tab.h"
#ifndef CPP
#define CPP "/bin/cpp"
#endif
/*
* known debug flags
* flags without a description may be exclusive to certain architectures
* -. Inhibit search for includes in source directory
* -0 R0ISZERO - qc
* -4
* -8
* -<
* -A !B
* -B non ANSI
* -C
* -D name define
* -F format specification check
* -G
* -H
* -I path include
* -L print every NAME symbol
* -M constant multiplication
* -N
* -P peephole
* -Q
* -R print registerization
* -S print assembly
* -T
* -V enable void* conversion warnings
* -W
* -X abort on error
* -Y
* -Z pickle
* -a acid declaration output
* -c print const if
* -d print declarations
* -e
* -f
* -g
* -h
* -i print initialization
* -l generate little-endian code
* -m print add/sub/mul trees
* -n print acid to file (%.c=%.acid) (with -a or -aa)
* -o file output file
* -p use standard cpp ANSI preprocessor (not on windows)
* -s print structure offsets (with -a or -aa)
* -t print type trees
* -v verbose printing
* -w print warnings
* -x
* -y
*/
void
main(int argc, char *argv[])
{
char **defs, *p;
int nproc, nout, status, i, c, ndef;
memset(debug, 0, sizeof(debug));
tinit();
cinit();
ginit();
arginit();
profileflg = 1; /* #pragma can turn it off */
tufield = simplet((1L<<tfield->etype) | BUNSIGNED);
defs = 0;
ndef = 0;
outfile = 0;
include[ninclude++] = ".";
ARGBEGIN {
default:
c = ARGC();
if(c >= 0 && c < sizeof(debug))
debug[c]++;
break;
case 'l': /* for little-endian mips */
if(thechar != 'v'){
print("can only use -l with vc");
errorexit();
}
thechar = '0';
thestring = "spim";
break;
case 'o':
outfile = ARGF();
break;
case 'D':
p = ARGF();
if(p) {
if((ndef & 15) == 0)
defs = allocn(defs, ndef*sizeof(defs[0]), 16*sizeof(defs[0]));
defs[ndef++] = p;
dodefine(p);
}
break;
case 'I':
p = ARGF();
if(p)
setinclude(p);
break;
} ARGEND
if(argc < 1 && outfile == 0) {
print("usage: %Cc [-options] files\n", thechar);
errorexit();
}
if(argc > 1 && systemtype(Windows)){
print("can't compile multiple files on windows\n");
errorexit();
}
if(argc > 1 && !systemtype(Windows)) {
nproc = 1;
/*
* if we're writing acid to standard output, don't compile
* concurrently, to avoid interleaving output.
*/
if(((!debug['a'] && !debug['Z']) || debug['n']) &&
(p = getenv("NPROC")) != nil)
nproc = atol(p); /* */
c = 0;
nout = 0;
for(;;) {
while(nout < nproc && argc > 0) {
i = myfork();
if(i < 0) {
i = mywait(&status);
if(i < 0) {
print("cannot create a process\n");
errorexit();
}
if(status)
c++;
nout--;
continue;
}
if(i == 0) {
fprint(2, "%s:\n", *argv);
if (compile(*argv, defs, ndef))
errorexit();
exits(0);
}
nout++;
argc--;
argv++;
}
i = mywait(&status);
if(i < 0) {
if(c)
errorexit();
exits(0);
}
if(status)
c++;
nout--;
}
}
if(argc == 0)
c = compile("stdin", defs, ndef);
else
c = compile(argv[0], defs, ndef);
if(c)
errorexit();
exits(0);
}
int
compile(char *file, char **defs, int ndef)
{
char *ofile, *p, **av;
int i, c, fd[2], status;
static int first = 1;
ofile = strdup(file);
p = utfrrune(ofile, pathchar());
if(p) {
*p++ = 0;
if(!debug['.'])
include[0] = strdup(ofile);
} else
p = ofile;
if(outfile == 0) {
if(p) {
outfile = p;
if(p = utfrrune(outfile, '.'))
if(p[1] == 'c' && p[2] == 0)
p[0] = 0;
if(debug['a'] && debug['n'])
outfile = smprint("%s.acid", outfile);
else if(debug['Z'] && debug['n'])
outfile = smprint("%s_pickle.c", outfile);
else
outfile = smprint("%s.%C", outfile, thechar);
} else
outfile = "/dev/null";
}
if(p = getenv("INCLUDE")) {
setinclude(p);
} else {
if(systemtype(Plan9)) {
setinclude(smprint("/%s/include", thestring));
setinclude("/sys/include");
}
}
if (first)
Binit(&diagbuf, 1, OWRITE);
/*
* if we're writing acid to standard output, don't keep scratching
* outbuf.
*/
if((debug['a'] || debug['Z']) && !debug['n']) {
if (first) {
outfile = 0;
Binit(&outbuf, dup(1, -1), OWRITE);
dup(2, 1);
}
} else {
c = mycreat(outfile, 0664 | DMTMP);
if(c < 0) {
diag(Z, "cannot open %s - %r", outfile);
outfile = 0;
errorexit();
}
Binit(&outbuf, c, OWRITE);
}
newio();
first = 0;
/* Use an ANSI preprocessor */
if(debug['p']) {
if(systemtype(Windows)) {
diag(Z, "-p option not supported on windows");
errorexit();
}
if(myaccess(file) < 0) {
diag(Z, "%s does not exist", file);
errorexit();
}
if(mypipe(fd) < 0) {
diag(Z, "pipe failed");
errorexit();
}
switch(myfork()) {
case -1:
diag(Z, "fork failed");
errorexit();
case 0:
close(fd[0]);
mydup(fd[1], 1);
close(fd[1]);
i = 8+ndef+ninclude;
av = alloc(i*sizeof(av[0]));
i = 0;
av[i++] = CPP;
av[i++] = "-+";
if(debug['.'])
av[i++] = "-.";
for(c = 0; c < ndef; c++)
av[i++] = smprint("-D%s", defs[c]);
for(c = 0; c < ninclude; c++)
av[i++] = smprint("-I%s", include[c]);
if(strcmp(file, "stdin") != 0)
av[i++] = file;
av[i] = 0;
if(debug['p'] > 1) {
for(c = 0; c < i; c++)
fprint(2, "%s ", av[c]);
fprint(2, "\n");
}
myexec(av[0], av);
fprint(2, "can't exec C preprocessor %s: %r\n", CPP);
errorexit();
default:
close(fd[1]);
newfile(file, fd[0]);
break;
}
} else {
if(strcmp(file, "stdin") == 0)
newfile(file, 0);
else
newfile(file, -1);
}
yyparse();
if(!debug['a'] && !debug['Z'])
gclean();
if(nerrors == 0 && mywait(&status) > 0 && status != 0)
nerrors++;
return nerrors;
}
void
errorexit(void)
{
if(outfile)
remove(outfile);
exits("error");
}
void
pushio(void)
{
Io *i;
i = iostack;
if(i == I) {
yyerror("botch in pushio");
errorexit();
}
i->p = fi.p;
i->c = fi.c;
}
void
newio(void)
{
Io *i;
static int pushdepth = 0;
i = iofree;
if(i == I) {
pushdepth++;
if(pushdepth > 1000) {
yyerror("macro/io expansion too deep");
errorexit();
}
i = alloc(sizeof(*i));
} else
iofree = i->link;
i->c = 0;
i->f = -1;
ionext = i;
}
void
newfile(char *s, int f)
{
Io *i;
if(debug['e'])
print("%L: %s\n", lineno, s);
i = ionext;
i->link = iostack;
iostack = i;
i->f = f;
if(f < 0)
i->f = open(s, 0);
if(i->f < 0) {
yyerror("%Cc: %r: %s", thechar, s);
errorexit();
}
fi.c = 0;
linehist(s, 0);
}
Sym*
slookup(char *s)
{
strncpy(symb, s, NSYMB);
if(symb[NSYMB-1] != '\0'){
yyerror("symbol too long: %s", s);
errorexit();
}
return lookup();
}
Sym*
lookup(void)
{
Sym *s;
ulong h;
char *p;
int c, n;
h = 0;
for(p=symb; *p;) {
h = h * 3;
h += *p++;
}
n = (p - symb) + 1;
if((long)h < 0)
h = ~h;
h %= NHASH;
c = symb[0];
for(s = hash[h]; s != S; s = s->link) {
if(s->name[0] != c)
continue;
if(strcmp(s->name, symb) == 0)
return s;
}
s = alloc(sizeof(*s));
s->name = alloc(n);
memmove(s->name, symb, n);
s->link = hash[h];
hash[h] = s;
syminit(s);
return s;
}
void
syminit(Sym *s)
{
s->lexical = LNAME;
s->block = 0;
s->offset = 0;
s->type = T;
s->suetag = T;
s->class = CXXX;
s->aused = 0;
s->sig = SIGNONE;
}
#define EOF (-1)
#define IGN (-2)
#define ESC (1<<20)
enum
{
Numdec = 1<<0,
Numlong = 1<<1,
Numuns = 1<<2,
Numvlong = 1<<3,
Numflt = 1<<4,
};
long
yylex(void)
{
vlong vv;
long c, c1, t, w;
char *cp;
Rune rune;
Sym *s;
if(peekc != IGN) {
c = peekc;
peekc = IGN;
goto l1;
}
l0:
c = GETC();
l1:
if(c >= Runeself) {
/*
* extension --
* all multibyte runes are alpha
*/
cp = symb;
goto talph;
}
if(isspace(c)) {
if(c == '\n')
lineno++;
goto l0;
}
if(isalpha(c)) {
cp = symb;
if(c != 'L')
goto talph;
*cp++ = c;
c = GETC();
if(c == '\'') {
/* L'x' */
c = escchar('\'', 1, 0);
if(c == EOF)
c = '\'';
c1 = escchar('\'', 1, 0);
if(c1 != EOF) {
yyerror("missing '");
peekc = c1;
}
yylval.vval = convvtox(c, TRUNE);
return LUCONST;
}
if(c == '"') {
goto caselq;
}
goto talph;
}
if(isdigit(c))
goto tnum;
switch(c)
{
case EOF:
peekc = EOF;
return -1;
case '_':
cp = symb;
goto talph;
case '#':
domacro();
goto l0;
case '.':
c1 = GETC();
if(isdigit(c1)) {
cp = symb;
*cp++ = c;
c = c1;
c1 = 0;
goto casedot;
}
break;
case '"':
strcpy(symb, "\"<string>\"");
cp = alloc(0);
c1 = 0;
/* "..." */
for(;;) {
c = escchar('"', 0, 1);
if(c == EOF)
break;
if(c & ESC) {
cp = allocn(cp, c1, 1);
cp[c1++] = c;
} else {
rune = c;
c = runelen(rune);
cp = allocn(cp, c1, c);
runetochar(cp+c1, &rune);
c1 += c;
}
}
yylval.sval.l = c1;
do {
cp = allocn(cp, c1, 1);
cp[c1++] = 0;
} while(c1 & MAXALIGN);
yylval.sval.s = cp;
return LSTRING;
caselq:
/* L"..." */
strcpy(symb, "\"L<string>\"");
cp = alloc(0);
c1 = 0;
for(;;) {
c = escchar('"', 1, 0);
if(c == EOF)
break;
cp = allocn(cp, c1, sizeof(Rune));
*(Rune*)(cp + c1) = c;
c1 += sizeof(Rune);
}
yylval.sval.l = c1;
do {
cp = allocn(cp, c1, sizeof(Rune));
*(Rune*)(cp + c1) = 0;
c1 += sizeof(Rune);
} while(c1 & MAXALIGN);
yylval.sval.s = cp;
return LLSTRING;
case '\'':
/* '.' */
c = escchar('\'', 0, 0);
if(c == EOF)
c = '\'';
c1 = escchar('\'', 0, 0);
if(c1 != EOF) {
yyerror("missing '");
peekc = c1;
}
vv = c;
yylval.vval = convvtox(vv, TUCHAR);
if(yylval.vval != vv)
yyerror("overflow in character constant: 0x%lx", c);
else
if(c & 0x80){
nearln = lineno;
warn(Z, "sign-extended character constant");
}
yylval.vval = convvtox(vv, TCHAR);
return LCONST;
case '/':
c1 = GETC();
if(c1 == '*') {
for(;;) {
c = getr();
while(c == '*') {
c = getr();
if(c == '/')
goto l0;
}
if(c == EOF) {
yyerror("eof in comment");
errorexit();
}
}
}
if(c1 == '/') {
for(;;) {
c = getr();
if(c == '\n')
goto l0;
if(c == EOF) {
yyerror("eof in comment");
errorexit();
}
}
}
if(c1 == '=')
return LDVE;
break;
case '*':
c1 = GETC();
if(c1 == '=')
return LMLE;
break;
case '%':
c1 = GETC();
if(c1 == '=')
return LMDE;
break;
case '+':
c1 = GETC();
if(c1 == '+')
return LPP;
if(c1 == '=')
return LPE;
break;
case '-':
c1 = GETC();
if(c1 == '-')
return LMM;
if(c1 == '=')
return LME;
if(c1 == '>')
return LMG;
break;
case '>':
c1 = GETC();
if(c1 == '>') {
c = LRSH;
c1 = GETC();
if(c1 == '=')
return LRSHE;
break;
}
if(c1 == '=')
return LGE;
break;
case '<':
c1 = GETC();
if(c1 == '<') {
c = LLSH;
c1 = GETC();
if(c1 == '=')
return LLSHE;
break;
}
if(c1 == '=')
return LLE;
break;
case '=':
c1 = GETC();
if(c1 == '=')
return LEQ;
break;
case '!':
c1 = GETC();
if(c1 == '=')
return LNE;
break;
case '&':
c1 = GETC();
if(c1 == '&')
return LANDAND;
if(c1 == '=')
return LANDE;
break;
case '|':
c1 = GETC();
if(c1 == '|')
return LOROR;
if(c1 == '=')
return LORE;
break;
case '^':
c1 = GETC();
if(c1 == '=')
return LXORE;
break;
default:
return c;
}
peekc = c1;
return c;
talph:
/*
* cp is set to symb and some
* prefix has been stored
*/
for(;;) {
if(cp >= &symb[NSYMB-UTFmax-1])
goto toolong;
if(c >= Runeself) {
for(c1=0;;) {
cp[c1++] = c;
if(fullrune(cp, c1))
break;
c = GETC();
}
cp += c1;
c = GETC();
continue;
}
if(!isalnum(c) && c != '_')
break;
*cp++ = c;
c = GETC();
}
*cp = 0;
if(debug['L'])
print("%L: %s\n", lineno, symb);
peekc = c;
s = lookup();
if(s->macro) {
newio();
cp = ionext->b;
if(macexpand(s, cp, sizeof(ionext->b)-1)){
pushio();
ionext->link = iostack;
iostack = ionext;
fi.p = cp;
fi.c = strlen(cp);
if(peekc != IGN) {
cp[fi.c++] = peekc;
cp[fi.c] = 0;
peekc = IGN;
}
goto l0;
} else {
ionext->link = iofree;
iofree = ionext;
}
}
yylval.sym = s;
if(s->class == CTYPEDEF || s->class == CTYPESTR)
return LTYPE;
return s->lexical;
tnum:
c1 = 0;
cp = symb;
vv = 0;
if(c != '0') {
c1 |= Numdec;
for(;;) {
if(!isdigit(c))
goto dc;
vv = vv*10 + c-'0';
if(cp >= &symb[NSYMB-1])
goto toolong;
*cp++ = c;
c = GETC();
}
}
*cp++ = c;
c = GETC();
if(c == 'x' || c == 'X')
for(;;) {
if(cp >= &symb[NSYMB-1])
goto toolong;
*cp++ = c;
c = GETC();
if(isdigit(c)){
vv = vv*16 + c-'0';
continue;
}
if(c >= 'a' && c <= 'f'){
vv = vv*16 + c + 10 - 'a';
continue;
}
if(c >= 'A' && c <= 'F'){
vv = vv*16 + c + 10 - 'A';
continue;
}
if(cp == symb+2)
yyerror("malformed hex constant");
goto ncu;
}
if(c == 'b' || c == 'B')
for(;;) {
if(cp >= &symb[NSYMB-1])
goto toolong;
*cp++ = c;
c = GETC();
if(c == '0' || c == '1'){
vv = vv*2 + c-'0';
continue;
}
if(cp == symb+2)
yyerror("malformed binary constant");
goto ncu;
}
if(c < '0' || c > '7')
goto dc;
for(;;) {
if(c < '0' || c > '7')
goto ncu;
vv = vv*8 + c-'0';
if(cp >= &symb[NSYMB-1])
goto toolong;
*cp++ = c;
c = GETC();
}
dc:
if(c == '.')
goto casedot;
if(c == 'e' || c == 'E')
goto casee;
ncu:
if((c == 'U' || c == 'u') && !(c1 & Numuns)) {
c = GETC();
c1 |= Numuns;
goto ncu;
}
if((c == 'L' || c == 'l') && !(c1 & Numvlong)) {
c = GETC();
if(c1 & Numlong)
c1 |= Numvlong;
c1 |= Numlong;
goto ncu;
}
*cp = 0;
peekc = c;
/*
* c99 is silly: decimal constants stay signed,
* hex and octal go unsigned before widening.
*/
w = 32;
if((c1 & (Numdec|Numuns)) == Numdec)
w = 31;
if(c1 & Numvlong || (c1 & Numlong) == 0 && (uvlong)vv >= 1ULL<<w){
if((c1&(Numdec|Numvlong)) == Numdec && vv < 1ULL<<32)
warn(Z, "int constant widened to vlong: %s", symb);
if((c1 & Numuns) || convvtox(vv, TVLONG) < 0) {
c = LUVLCONST;
t = TUVLONG;
goto nret;
}
c = LVLCONST;
t = TVLONG;
goto nret;
}
if(c1 & Numlong) {
if((c1 & Numuns) || convvtox(vv, TLONG) < 0) {
c = LULCONST;
t = TULONG;
goto nret;
}
c = LLCONST;
t = TLONG;
goto nret;
}
if((c1 & Numuns) || convvtox(vv, TINT) < 0) {
c = LUCONST;
t = TUINT;
goto nret;
}
c = LCONST;
t = TINT;
goto nret;
nret:
yylval.vval = convvtox(vv, t);
if(yylval.vval != vv){
nearln = lineno;
warn(Z, "truncated constant: %T %s", types[t], symb);
}
return c;
casedot:
for(;;) {
if(cp >= &symb[NSYMB-1])
goto toolong;
*cp++ = c;
c = GETC();
if(!isdigit(c))
break;
}
if(c != 'e' && c != 'E')
goto caseout;
casee:
if(cp >= &symb[NSYMB-2])
goto toolong;
*cp++ = 'e';
c = GETC();
if(c == '+' || c == '-') {
*cp++ = c;
c = GETC();
}
if(!isdigit(c))
yyerror("malformed fp constant exponent");
while(isdigit(c)) {
if(cp >= &symb[NSYMB-1])
goto toolong;
*cp++ = c;
c = GETC();
}
caseout:
if(c == 'L' || c == 'l') {
c = GETC();
c1 |= Numlong;
} else
if(c == 'F' || c == 'f') {
c = GETC();
c1 |= Numflt;
}
*cp = 0;
peekc = c;
yylval.dval = strtod(symb, nil);
if(isInf(yylval.dval, 1) || isInf(yylval.dval, -1)) {
yyerror("overflow in float constant");
yylval.dval = 0;
}
if(c1 & Numflt)
return LFCONST;
return LDCONST;
toolong:
yyerror("token too long: %.*s...", utfnlen(symb, cp-symb), symb);
errorexit();
return -1;
}
int
getc(void)
{
int c;
if(peekc != IGN) {
c = peekc;
peekc = IGN;
} else
c = GETC();
if(c == '\n')
lineno++;
if(c == EOF) {
yyerror("End of file");
errorexit();
}
return c;
}
long
getr(void)
{
int c, i;
char str[UTFmax+1];
Rune rune;
c = getc();
if(c < Runeself)
return c;
i = 0;
str[i++] = c;
loop:
c = getc();
str[i++] = c;
if(!fullrune(str, i))
goto loop;
c = chartorune(&rune, str);
if(rune == Runeerror && c == 1) {
nearln = lineno;
diag(Z, "illegal rune in string");
for(c=0; c<i; c++)
print(" %.2x", *(uchar*)(str+c));
print("\n");
}
return rune;
}
int
getnsc(void)
{
int c;
if(peekc != IGN) {
c = peekc;
peekc = IGN;
} else
c = GETC();
for(;;) {
if(c >= Runeself || !isspace(c))
return c;
if(c == '\n') {
lineno++;
return c;
}
c = GETC();
}
}
void
unget(int c)
{
peekc = c;
if(c == '\n')
lineno--;
}
long
escchar(long e, int longflg, int escflg)
{
long c, l;
int i;
loop:
c = getr();
if(c == '\n') {
yyerror("newline in string");
return EOF;
}
if(c != '\\') {
if(c == e)
c = EOF;
return c;
}
c = getr();
if(c == 'x') {
/*
* note this is not ansi,
* supposed to only accept 2 hex
*/
i = 2;
if(longflg)
i = 6;
l = 0;
for(; i>0; i--) {
c = getc();
if(c >= '0' && c <= '9') {
l = l*16 + c-'0';
continue;
}
if(c >= 'a' && c <= 'f') {
l = l*16 + c-'a' + 10;
continue;
}
if(c >= 'A' && c <= 'F') {
l = l*16 + c-'A' + 10;
continue;
}
unget(c);
break;
}
if(escflg)
l |= ESC;
return l;
}
if(c >= '0' && c <= '7') {
/*
* note this is not ansi,
* supposed to only accept 3 oct
*/
i = 2;
if(longflg)
i = 6;
l = c - '0';
for(; i>0; i--) {
c = getc();
if(c >= '0' && c <= '7') {
l = l*8 + c-'0';
continue;
}
unget(c);
}
if(escflg)
l |= ESC;
return l;
}
switch(c)
{
case '\n': goto loop;
case 'n': return '\n';
case 't': return '\t';
case 'b': return '\b';
case 'r': return '\r';
case 'f': return '\f';
case 'a': return '\a';
case 'v': return '\v';
}
return c;
}
struct
{
char *name;
ushort lexical;
ushort type;
} itab[] =
{
"auto", LAUTO, 0,
"break", LBREAK, 0,
"case", LCASE, 0,
"char", LCHAR, TCHAR,
"const", LCONSTNT, 0,
"continue", LCONTINUE, 0,
"default", LDEFAULT, 0,
"do", LDO, 0,
"double", LDOUBLE, TDOUBLE,
"else", LELSE, 0,
"enum", LENUM, 0,
"extern", LEXTERN, 0,
"float", LFLOAT, TFLOAT,
"for", LFOR, 0,
"goto", LGOTO, 0,
"if", LIF, 0,
"inline", LINLINE, 0,
"int", LINT, TINT,
"long", LLONG, TLONG,
"_Noreturn", LNORET, 0,
"register", LREGISTER, 0,
"restrict", LRESTRICT, 0,
"return", LRETURN, 0,
"SET", LSET, 0,
"short", LSHORT, TSHORT,
"signed", LSIGNED, 0,
"signof", LSIGNOF, 0,
"sizeof", LSIZEOF, 0,
"static", LSTATIC, 0,
"struct", LSTRUCT, 0,
"switch", LSWITCH, 0,
"typedef", LTYPEDEF, 0,
"typestr", LTYPESTR, 0,
"union", LUNION, 0,
"unsigned", LUNSIGNED, 0,
"USED", LUSED, 0,
"void", LVOID, TVOID,
"volatile", LVOLATILE, 0,
"while", LWHILE, 0,
0
};
void
cinit(void)
{
Sym *s;
int i;
Type *t;
nerrors = 0;
lineno = 1;
iostack = I;
iofree = I;
peekc = IGN;
types[TXXX] = T;
types[TCHAR] = typ(TCHAR, T);
types[TUCHAR] = typ(TUCHAR, T);
types[TSHORT] = typ(TSHORT, T);
types[TUSHORT] = typ(TUSHORT, T);
types[TINT] = typ(TINT, T);
types[TUINT] = typ(TUINT, T);
types[TLONG] = typ(TLONG, T);
types[TULONG] = typ(TULONG, T);
types[TVLONG] = typ(TVLONG, T);
types[TUVLONG] = typ(TUVLONG, T);
types[TFLOAT] = typ(TFLOAT, T);
types[TDOUBLE] = typ(TDOUBLE, T);
types[TVOID] = typ(TVOID, T);
types[TENUM] = typ(TENUM, T);
types[TFUNC] = typ(TFUNC, types[TINT]);
types[TIND] = typ(TIND, types[TVOID]);
for(i=0; i<NHASH; i++)
hash[i] = S;
for(i=0; itab[i].name; i++) {
s = slookup(itab[i].name);
s->lexical = itab[i].lexical;
if(itab[i].type != 0)
s->type = types[itab[i].type];
}
blockno = 0;
autobn = 0;
autoffset = 0;
t = typ(TARRAY, types[TCHAR]);
t->width = 0;
symstring = slookup(".string");
symstring->class = CSTATIC;
symstring->type = t;
t = typ(TARRAY, types[TCHAR]);
t->width = 0;
nodproto = new(OPROTO, Z, Z);
dclstack = D;
pathname = allocn(pathname, 0, 100);
if(mygetwd(pathname, 99) == 0) {
pathname = allocn(pathname, 100, 900);
if(mygetwd(pathname, 999) == 0)
strcpy(pathname, "/???");
}
fmtinstall('O', Oconv);
fmtinstall('T', Tconv);
fmtinstall('F', FNconv);
fmtinstall('L', Lconv);
fmtinstall('Q', Qconv);
fmtinstall('|', VBconv);
}
int
filbuf(void)
{
Io *i;
loop:
i = iostack;
if(i == I)
return EOF;
if(i->f < 0)
goto pop;
fi.c = read(i->f, i->b, BUFSIZ) - 1;
if(fi.c < 0) {
close(i->f);
linehist(0, 0);
goto pop;
}
fi.p = i->b + 1;
return i->b[0] & 0xff;
pop:
iostack = i->link;
i->link = iofree;
iofree = i;
i = iostack;
if(i == I)
return EOF;
fi.p = i->p;
fi.c = i->c;
if(--fi.c < 0)
goto loop;
return *fi.p++ & 0xff;
}
int
Oconv(Fmt *fp)
{
int a;
a = va_arg(fp->args, int);
if(a < OXXX || a > OEND)
return fmtprint(fp, "***badO %d***", a);
return fmtstrcpy(fp, onames[a]);
}
int
Lconv(Fmt *fp)
{
Hist *h;
struct
{
Hist* incl; /* start of this include file */
long idel; /* delta line number to apply to include */
Hist* line; /* start of this #line directive */
long ldel; /* delta line number to apply to #line */
} a[HISTSZ];
long l, d;
int i, n;
l = va_arg(fp->args, long);
n = 0;
for(h = hist; h != H; h = h->link) {
if(l < h->line)
break;
if(h->name) {
if(h->offset != 0) { /* #line directive, not #pragma */
if(n > 0 && n < HISTSZ && h->offset >= 0) {
a[n-1].line = h;
a[n-1].ldel = h->line - h->offset + 1;
}
} else {
if(n < HISTSZ) { /* beginning of file */
a[n].incl = h;
a[n].idel = h->line;
a[n].line = 0;
}
n++;
}
continue;
}
n--;
if(n > 0 && n < HISTSZ) {
d = h->line - a[n].incl->line;
a[n-1].ldel += d;
a[n-1].idel += d;
}
}
if(n > HISTSZ)
n = HISTSZ;
if(n == 0)
return fmtprint(fp, "<eof>");
for(i=n-1; i>=0; i--) {
if(i != n-1) {
if(fp->flags & ~(FmtWidth|FmtPrec)) /* BUG ROB - was f3 */
break;
fmtrune(fp, ' ');
}
if(a[i].line)
fmtprint(fp, "%s:%ld[%s:%ld]",
a[i].line->name, l-a[i].ldel+1,
a[i].incl->name, l-a[i].idel+1);
else
fmtprint(fp, "%s:%ld",
a[i].incl->name, l-a[i].idel+1);
l = a[i].incl->line - 1; /* now print out start of this file */
}
return 0;
}
int
Tconv(Fmt *fp)
{
Type *t, *t1;
int et;
long n;
t = va_arg(fp->args, Type*);
while(t != T) {
if(t->garb&~GINCOMPLETE)
fmtprint(fp, "%s ", gnames[t->garb&~GINCOMPLETE]);
et = t->etype;
fmtprint(fp, "%s", tnames[et]);
if(et == TFUNC && (t1 = t->down) != T) {
fmtprint(fp, "(%T", t1);
while((t1 = t1->down) != T)
fmtprint(fp, ", %T", t1);
fmtprint(fp, ")");
}
if(et == TARRAY) {
n = t->width;
if(t->link != T && t->link->width)
n /= t->link->width;
fmtprint(fp, "[%ld]", n);
}
if(t->nbits)
fmtprint(fp, " %d:%d", t->shift, t->nbits);
if(typesu[et]) {
fmtprint(fp, " %s", t->tag? t->tag->name: "{}");
break;
}
if((t = t->link) == T)
break;
fmtrune(fp, ' ');
}
return 0;
}
int
FNconv(Fmt *fp)
{
char *str;
Node *n;
n = va_arg(fp->args, Node*);
str = "<indirect>";
if(n != Z && (n->op == ONAME || n->op == ODOT || n->op == OELEM))
str = n->sym->name;
return fmtstrcpy(fp, str);
}
int
Qconv(Fmt *fp)
{
long b;
int i;
b = va_arg(fp->args, long);
while(b) {
i = bitno(b);
b &= ~(1L << i);
fmtprint(fp, "%s%s", qnames[i], b? " ": "");
}
return 0;
}
int
VBconv(Fmt *fp)
{
int n, t, pc;
n = va_arg(fp->args, int);
pc = 0; /* BUG: was printcol */
while(pc < n) {
t = (pc+4) & ~3;
if(t <= n) {
fmtrune(fp, '\t');
pc = t;
} else {
fmtrune(fp, ' ');
pc++;
}
}
return 0;
}
void
setinclude(char *p)
{
int i;
char *e;
while(*p != 0) {
e = strchr(p, ' ');
if(e != 0)
*e = '\0';
for(i=1; i < ninclude; i++)
if(strcmp(p, include[i]) == 0)
break;
if(i >= ninclude){
if(ninclude >= nelem(include)) {
diag(Z, "ninclude too small %d", nelem(include));
exits("ninclude");
}
include[ninclude++] = p;
}
if(e == 0)
break;
p = e+1;
}
}