static void handle_elif()
#endif
{
if (iftop) {
if (iftop->state == EXPECT_ELSE) {
/* last cond was false... */
int cond;
ifstate_t *p = iftop;
/* pop previous condition */
iftop = p->next;
FREE((char *) p);
#ifdef LEXER
*--outp = '\0';
add_input(sp);
#endif
cond = cond_get_exp(0);
#ifdef LEXER
if (*outp++) {
yyerror("Condition too complex in #elif");
while (*outp++);
#else
if (*outp != '\n') {
yyerror("Condition too complex in #elif");
#endif
} else handle_cond(cond);
} else {/* EXPECT_ENDIF */
/*
* last cond was true...skip to end of
* conditional
*/
skip_to("endif", (char *) 0);
}
} else {
yyerrorp("Unexpected %celif");
}
}
static void handle_else (void) {
if (iftop) {
if (iftop->state == EXPECT_ELSE) {
iftop->state = EXPECT_ENDIF;
} else {
skip_to("endif", (char *) 0);
}
} else {
yyerrorp("Unexpected %cendif");
}
}
static void handle_endif (void) {
if (iftop && (iftop->state == EXPECT_ENDIF ||
iftop->state == EXPECT_ELSE)) {
ifstate_t *p = iftop;
iftop = p->next;
FREE((char *) p);
} else {
yyerrorp("Unexpected %cendif");
}
}
#define BNOT 1
#define LNOT 2
#define UMINUS 3
#define UPLUS 4
#define MULT 1
#define DIV 2
#define MOD 3
#define BPLUS 4
#define BMINUS 5
#define LSHIFT 6
#define RSHIFT 7
#define LESS 8
#define LEQ 9
#define GREAT 10
#define GEQ 11
#define EQ 12
#define NEQ 13
#define BAND 14
#define XOR 15
#define BOR 16
#define LAND 17
#define LOR 18
#define QMARK 19
static char _optab[] =
{0, 4, 0, 0, 0, 26, 56, 0, 0, 0, 18, 14, 0, 10, 0, 22, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 30, 50, 40, 74,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 70, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 63, 0, 1};
static char optab2[] =
{BNOT, 0, 0, LNOT, '=', NEQ, 7, 0, 0, UMINUS, 0, BMINUS, 10, UPLUS, 0, BPLUS, 10,
0, 0, MULT, 11, 0, 0, DIV, 11, 0, 0, MOD, 11,
0, '<', LSHIFT, 9, '=', LEQ, 8, 0, LESS, 8, 0, '>', RSHIFT, 9, '=', GEQ, 8, 0, GREAT, 8,
0, '=', EQ, 7, 0, 0, 0, '&', LAND, 3, 0, BAND, 6, 0, '|', LOR, 2, 0, BOR, 4,
0, 0, XOR, 5, 0, 0, QMARK, 1};
#define optab1 (_optab-' ')
static int cond_get_exp (int priority)
{
int c;
int value, value2, x;
#ifdef LEXER
do
c = exgetc();
while (is_wspace(c));
if (c == '(') {
#else
if ((c = exgetc()) == '(') {
#endif
value = cond_get_exp(0);
#ifdef LEXER
do
c = exgetc();
while (is_wspace(c));
if (c != ')') {
yyerror("bracket not paired in #if");
if (!c) *--outp = '\0';
}
#else
if ((c = exgetc()) != ')') yyerrorp("bracket not paired in %cif");
#endif
} else if (ispunct(c)) {
if (!(x = optab1[c])) {
yyerrorp("illegal character in %cif");
return 0;
}
value = cond_get_exp(12);
switch (optab2[x - 1]) {
case BNOT:
value = ~value;
break;
case LNOT:
value = !value;
break;
case UMINUS:
value = -value;
break;
case UPLUS:
value = value;
break;
default:
yyerrorp("illegal unary operator in %cif");
}
} else {
int base;
if (!isdigit(c)) {
#ifdef LEXER
if (!c) {
#else
if (c == '\n') {
#endif
yyerrorp("missing expression in %cif");
} else
yyerrorp("illegal character in %cif");
return 0;
}
value = 0;
if (c != '0')
base = 10;
else {
c = *outp++;
if (c == 'x' || c == 'X') {
base = 16;
c = *outp++;
} else
base = 8;
}
for (;;) {
if (isdigit(c))
x = -'0';
else if (isupper(c))
x = -'A' + 10;
else if (islower(c))
x = -'a' + 10;
else
break;
x += c;
if (x > base)
break;
value = value * base + x;
c = *outp++;
}
outp--;
}
for (;;) {
#ifdef LEXER
do
c = exgetc();
while (is_wspace(c));
if (!ispunct(c))
break;
#else
if (!ispunct(c = exgetc()))
break;
#endif
if (!(x = optab1[c]))
break;
value2 = *outp++;
for (;; x += 3) {
if (!optab2[x]) {
outp--;
if (!optab2[x + 1]) {
yyerrorp("illegal operator use in %cif");
return 0;
}
break;
}
if (value2 == optab2[x])
break;
}
if (priority >= optab2[x + 2]) {
if (optab2[x]) *--outp = value2;
break;
}
value2 = cond_get_exp(optab2[x + 2]);
switch (optab2[x + 1]) {
case MULT:
value *= value2;
break;
case DIV:
if (value2)
value /= value2;
else
yyerrorp("division by 0 in %cif");
break;
case MOD:
if (value2)
value %= value2;
else
yyerrorp("modulo by 0 in %cif");
break;
case BPLUS:
value += value2;
break;
case BMINUS:
value -= value2;
break;
case LSHIFT:
value <<= value2;
break;
case RSHIFT:
value >>= value2;
break;
case LESS:
value = value < value2;
break;
case LEQ:
value = value <= value2;
break;
case GREAT:
value = value > value2;
break;
case GEQ:
value = value >= value2;
break;
case EQ:
value = value == value2;
break;
case NEQ:
value = value != value2;
break;
case BAND:
value &= value2;
break;
case XOR:
value ^= value2;
break;
case BOR:
value |= value2;
break;
case LAND:
value = value && value2;
break;
case LOR:
value = value || value2;
break;
case QMARK:
#ifdef LEXER
do
c = exgetc();
while (isspace(c));
if (c != ':') {
yyerror("'?' without ':' in #if");
outp--;
return 0;
}
#else
if ((c = exgetc()) != ':') yyerrorp("'?' without ':' in %cif");
#endif
if (value) {
cond_get_exp(1);
value = value2;
} else
value = cond_get_exp(1);
break;
}
}
outp--;
return value;
}
static void
handle_cond (int c)
{
ifstate_t *p;
if (!c)
skip_to("else", "endif");
p = ALLOCATE(ifstate_t, TAG_COMPILER, "handle_cond");
p->next = iftop;
iftop = p;
p->state = c ? EXPECT_ENDIF : EXPECT_ELSE;
}
static int
yylex1(void)
{
register char *yyp;
register int c;
register int c1, c2;
for (;;)
{
if (lex_fatal)
{
return -1;
}
switch(c = mygetc())
{
case EOF:
if (inctop)
{
struct incstate *p;
p = inctop;
(void)fclose(yyin);
/*(void)fprintf(stderr, "popping to %s\n", p->file);*/
free(current_file);
nexpands = 0;
current_file = p->file;
current_line = p->line + 1;
current_incfile = p->incfnum;
pragma_strict_types = p->pragma_strict_types;
yyin = p->yyin;
slast = p->slast;
lastchar = p->lastchar;
inctop = p->next;
if (p->nbuf)
{
nbuf = p->nbuf;
outp = defbuf + DEFMAX - nbuf;
memcpy(outp, p->outp, nbuf);
free((char *)p->outp);
}
else
{
nbuf = 0;
outp = defbuf + DEFMAX;
}
store_line_number_info(current_incfile, current_line);
incdepth--;
free((char *)p);
break;
}
if (iftop)
{
struct ifstate *p = iftop;
lexerror(p->state == EXPECT_ENDIF ? "Missing #endif" : "Missing #else");
while (iftop)
{
p = iftop;
iftop = p->next;
free((char *)p);
}
}
return -1;
case '\n':
{
nexpands=0;
store_line_number_info(current_incfile, current_line);
current_line++;
total_lines++;
}
/* FALLTHROUGH */
case ' ':
case '\t':
case '\f':
case '\v':
break;
case '+':
TRY('+', F_INC);
TRY('=', F_ADD_EQ);
return c;
case '-':
TRY('>', F_ARROW);
TRY('-', F_DEC);
TRY('=', F_SUB_EQ);
return c;
case '&':
TRY('&', F_LAND);
TRY('=', F_AND_EQ);
return c;
case '|':
TRY('|', F_LOR);
TRY('=', F_OR_EQ);
return c;
case '^':
TRY('=', F_XOR_EQ);
return c;
case '<':
if (gobble('<')) {
TRY('=', F_LSH_EQ);
return F_LSH;
}
TRY('=', F_LE);
return c;
case '>':
if (gobble('>'))
{
TRY('=', F_RSH_EQ);
return F_RSH;
}
TRY('=', F_GE);
return c;
case '*':
TRY('=', F_MULT_EQ);
return c;
case '%':
TRY('=', F_MOD_EQ);
return F_MOD;
case '/':
if (gobble('*'))
{
skip_comment();
break;
}
else if (gobble('/'))
{
skip_comment2();
break;
}
TRY('=', F_DIV_EQ);
return c;
case '=':
TRY('=', F_EQ);
return c;
case ';':
case '(':
case ')':
case ',':
case '{':
case '}':
case '~':
case '[':
case ']':
case '?':
case '@':
return c;
case '!':
TRY('=', F_NE);
return F_NOT;
case ':':
TRY(':', F_COLON_COLON);
return ':';
case '.':
if (gobble('.'))
{
if (gobble('.'))
return F_VARARG;
else
return F_RANGE;
}
return c;
case '#':
if (lastchar == '\n')
{
char *ssp = 0;
int quote;
yyp = yytext;
do
{
c = mygetc();
} while (isspace(c));
for (quote = 0;;)
{
if (c == '"')
quote ^= 1;
/*gc - handle comments cpp-like! 1.6.91 @@@*/
while (!quote && c == '/')
{
if (gobble('*'))
{
skip_comment();
c = mygetc();
}
else
break;
}
if (!ssp && isspace(c))
ssp = yyp;
if (c == '\n' || c == EOF)
break;
SAVEC;
c = mygetc();
}
if (ssp)
{
*ssp++ = 0;
while (isspace(*ssp))
ssp++;
}
else
{
ssp = yyp;
}
*yyp = 0;
if (strcmp("define", yytext) == 0)
{
handle_define(ssp);
}
else if (strcmp("if", yytext) == 0)
{
#if 0
short int nega=0; /*@@@ allow #if !VAR gc 1.6.91*/
if (*ssp=='!'){ ssp++; nega=1;}
if (isdigit(*ssp))
{
char *p;
long l;
l = strtol(ssp, &p, 10);
while (isspace(*p))
p++;
if (*p)
lexerror("Condition too complex in #if");
else
handle_cond(nega ? !(int)l : (int)l);
}
else if (isalunum(*ssp))
{
char *p = ssp;
while (isalunum(*p))
p++;
if (*p)
{
*p++ = 0;
while (isspace(*p))
p++;
}
if (*p)
lexerror("Condition too complex in #if");
else
{
struct defn *d;
d = lookup_define(ssp);
if (d)
{
handle_cond(nega ? !atoi(d->exps) : atoi(d->exps));/* a hack! */
}
else
{
handle_cond(nega?1:0); /* cpp-like gc*/
}
}
}
else
lexerror("Condition too complex in #if");
#else
int cond;
myungetc(0);
add_input(ssp);
cond = cond_get_exp(0);
if (mygetc())
{
lexerror("Condition too complex in #if");
while (mygetc())
;
}
else
handle_cond(cond);
#endif
}
else if (strcmp("ifdef", yytext) == 0)
{
deltrail(ssp);
handle_cond(lookup_define(ssp) != 0);
}
else if (strcmp("ifndef", yytext) == 0)
{
deltrail(ssp);
handle_cond(lookup_define(ssp) == 0);
}
else if (strcmp("else", yytext) == 0)
{
if (iftop && iftop->state == EXPECT_ELSE)
{
struct ifstate *p = iftop;
/*(void)fprintf(stderr, "found else\n");*/
iftop = p->next;
free((char *)p);
(void)skip_to("endif", (char *)0);
store_line_number_info(current_incfile, current_line);
current_line++;
total_lines++;
}
else
{
lexerror("Unexpected #else");
}
}
else if (strcmp("endif", yytext) == 0)
{
if (iftop && (iftop->state == EXPECT_ENDIF ||
iftop->state == EXPECT_ELSE))
{
struct ifstate *p = iftop;
/*(void)fprintf(stderr, "found endif\n");*/
iftop = p->next;
free((char *)p);
}
else
{
lexerror("Unexpected #endif");
}
}
else if (strcmp("undef", yytext) == 0)
{
struct defn *d;
deltrail(ssp);
if ((d = lookup_define(ssp)) != NULL )
d->undef++;
}
else if (strcmp("echo", yytext) == 0)
{
(void)fprintf(stderr, "%s\n", ssp);
}
else if (strcmp("include", yytext) == 0)
{
/*(void)fprintf(stderr, "including %s\n", ssp); */
handle_include(ssp, 0);
}
else if (strcmp("pragma", yytext) == 0)
{
deltrail(ssp);
handle_pragma(ssp);
}
else if (strcmp("error", yytext) == 0)
{
handle_exception(ERROR, ssp);
}
else if (strcmp("warning", yytext) == 0)
{
handle_exception(WARNING, ssp);
}
else
{
lexerror("Unrecognised # directive");
}
myungetc('\n');
break;
}
else
goto badlex;
case '\'':
yylval.number = mygetc();
if (yylval.number == '\\')
{
int tmp = mygetc();
switch (tmp)
{
case 'n': yylval.number = '\n'; break;
case 't': yylval.number = '\t'; break;
case 'b': yylval.number = '\b'; break;
case 'a': yylval.number = '\a'; break;
case 'v': yylval.number = '\v'; break;
case '\'':
case '\\':
case '"':
yylval.number = tmp; break;
default:
lexwarning("Bad character escape sequence");
yylval.number = tmp;
break;
}
}
if (!gobble('\''))
lexerror("Illegal character constant");
return F_NUMBER;
case '"':
yyp = yytext;
*yyp++ = c;
for (;;)
{
c = mygetc();
if (c == EOF)
{
lexerror("End of file in string");
return string("\"\"");
}
else if (c == '\n')
{
lexerror("Newline in string");
return string("\"\"");
}
SAVEC;
if (c == '"')
break;
if (c == '\\')
{
c = mygetc();
if ( c == '\n' )
{
yyp--;
store_line_number_info(current_incfile, current_line);
current_line++;
total_lines++;
}
else if ( c == EOF )
{
/* some operating systems give EOF only once */
myungetc(c);
}
else
*yyp++ = c;
}
}
*yyp = 0;
return string(yytext);
case '0':
c = mygetc();
if ( c == 'X' || c == 'x' || c == 'o')
{
char *endptr;
long long value;
int base = 16;
if (c == 'o')
base = 8;
yyp = yytext;
for (;;)
{
c = mygetc();
if (!isxdigit(c))
break;
SAVEC;
}
myungetc(c);
*yyp = '\0';
value = strtoll(yytext, &endptr, base);
if (*endptr != '\0')
{
fprintf(stderr, "%s\n", yytext);
lexwarning("Invalid digits in octal number number");
}
return number(value);
}
myungetc(c);
c = '0';
/* FALLTHROUGH */
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
yyp = yytext;
*yyp++ = c;
for (;;)
{
c = mygetc();
if (!isdigit(c))
break;
SAVEC;
}
if (c == '.')
{
if (isdigit(c1 = mygetc()))
{
SAVEC;
c = c1;
SAVEC;
for (c = mygetc(); isdigit(c); c = mygetc())
SAVEC;
if (c == 'e' || c == 'E')
{
c1 = mygetc();
if (c1 == '-' || c1 == '+')
{
c2 = mygetc();
if (isdigit(c2))
{
SAVEC;
c = c1;
SAVEC;
c = c2;
SAVEC;
for (c = mygetc(); isdigit(c); c = mygetc())
SAVEC;
}
else
{
myungetc(c2);
myungetc(c1);
}
}
else if (isdigit(c1))
{
SAVEC;
c = c1;
SAVEC;
for (c = mygetc(); isdigit(c); c = mygetc())
SAVEC;
}
else
myungetc(c1);
}
myungetc(c);
*yyp = 0;
return real(strtod(yytext, NULL));
}
myungetc(c1);
}
myungetc(c);
*yyp = 0;
if (*yytext == '0')
{
/* OCTALS */
char *endptr;
long long value;
value = strtoll(yytext, &endptr, 010);
if (*endptr != '\0')
lexwarning("Invalid digits in octal number");
if (value != 0)
lexwarning("Obsolete octal format used. Use 0o111 syntax");
return number(value);
}
return number(atoll(yytext));
default:
if (isalpha(c) || c == '_') {
int r;
yyp = yytext;
*yyp++ = c;
for (;;)
{
c = mygetc();
if (!isalunum(c))
break;
SAVEC;
}
*yyp = 0;
myungetc(c);
if (!expand_define())
{
r = lookup_resword(yytext);
if (r >= 0)
{
return r;
}
else
return ident(yytext);
}
break;
}
goto badlex;
}
}
badlex:
{
lexerror("Illegal character (hex %02x) '%c'", c, c);
return ' ';
}
}
