expr
nggen_list0(
enum expr_code code
)
{
return(nggen_make_enode_p(code, NULL));
}
expr
nggen_list1(
enum expr_code code,
expr x1
)
{
return(nggen_make_enode_p(code, (void *)nggen_cons_list(x1, NULL)));
}
expr
nggen_list3(
enum expr_code code,
expr x1,
expr x2,
expr x3
)
{
return(nggen_make_enode_p(code, (void *)
nggen_cons_list(x1,
nggen_cons_list(x2, nggen_cons_list(x3, NULL)))));
}
int
nggen_read_identifier(
char ch
)
{
char *cp;
SYMBOL sp;
int rc = 0;
cp = yytext;
do {
*cp++ = ch;
ch = GETCH();
if ( cp >= &yytext[lex_bufsize-1] ) {
nggen_fatal("too long identifier");
break;
}
} while ( isalnum((int)ch) || ch == '_' || ch == '$' );
UNGETCH(ch); /* push back */
*cp = '\0';
sp = nggen_find_symbol(yytext);
switch ( sp->s_type ) {
case S_KEYWORD:
rc = sp->s_value;
break;
case S_TYPE:
yylval.val = nggen_make_enode(BASIC_TYPE_NODE, sp->s_value);
rc = TYPE;
break;
case S_CLASS:
yylval.val = nggen_make_enode(MODE_SPEC_NODE, sp->s_value);
rc = MODE;
break;
case S_DISTMODE:
yylval.val = nggen_make_enode(DISTMODE_SPEC_NODE, sp->s_value);
rc = DISTMODE;
break;
case S_IDENT:
yylval.val = nggen_make_enode_p(IDENT, sp);
rc = IDENTIFIER;
break;
default:
nggen_fatal("nggen_read_identifier");
break;
}
return(rc);
}
expr
nggen_read_rest_of_body(
int flag
)
{
char *cp;
int ch;
char in_string;
int nest_level;
cp = yytext;
if ( flag ) {
*cp++ = '{'; /* already read */
}
in_string = 0;
nest_level = 1;
do {
ch = GETCH();
if ( ch == EOF ) {
nggen_error("unexpected EOF");
break;
} else if ( ch == '\\' ) { /* escape */
*cp++ = ch;
*cp++ = GETCH();
continue;
}
if ( in_string != 0 && in_string == ch ) {
in_string = 0;
} else if ( in_string == 0 ) { /* out string */
if ( ch == '"' || ch == '\'' ) {
in_string = ch;
} else if ( ch == '{' ) { /* else count nest level */
nest_level++;
} else if ( ch == '}' ) {
nest_level--;
}
}
*cp++ = ch;
} while ( nest_level > 0 );
if ( !flag ) {
cp--;
}
*cp = '\0';
return(nggen_make_enode_p(STRING_CONSTANT, nggen_save_str(yytext)));
}
int
nggen_read_string_constant(
int mark
)
{
int ch;
char *cp;
int value;
int i;
cp = yytext;
while ( (ch = GETCH()) != mark ) {
switch ( ch ) {
case EOF:
nggen_error("unexpected EOF");
break;
#ifdef not
case '\n':
nggen_error("newline in string or char constant");
break;
#endif
case '\\': /* escape */
switch ( ch = GETCH() ) {
case '\n':
continue;
case 'n':
ch = '\n';
break;
case 'r':
ch = '\r';
break;
case 'b':
ch = '\b';
break;
case 't':
ch = '\t';
break;
case 'f':
ch = '\f';
break;
case 'v':
ch = '\013';
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
value = ch - '0';
ch = GETCH(); /* try for 2 */
if ( ch >= '0' && ch <= '7' ) {
value = (value << 3) | (ch - '0');
ch = GETCH();
if ( ch >= '0' && ch <= '7' ) {
value = (value << 3) | (ch - '0');
} else {
UNGETCH(ch);
}
} else {
UNGETCH(ch);
}
ch = value;
break;
}
default:
*cp++ = ch;
}
if ( cp >= &yytext[lex_bufsize - 1] ) {
nggen_fatal("too long string");
break;
}
}
*cp = '\0';
if ( mark == '"' ) { /* end of string or char constant */
yylval.val = nggen_make_enode_p(STRING_CONSTANT,
nggen_save_str(yytext));
return(STRING);
} else {
if ( cp == yytext ) { /* end the character constant */
nggen_error("empty character constant");
}
if ( (unsigned)(cp - yytext) > (sizeof(int) / sizeof(char)) ) {
nggen_error("too many characters in character constant");
}
value = 0;
for ( i = 0; (unsigned)i < sizeof(int); i++ ) {
if ( yytext[i] == 0 ) {
break;
}
value = (value << 8)| (0xFF & yytext[i]);
}
yylval.val = nggen_make_enode(INT_CONSTANT, value);
}
return(CONSTANT);
}
int
nggen_read_number(
int ch
)
{
char *cp;
long int value;
value = 0;
if ( ch == '0' ) {
ch = GETCH();
if ( ch == 'x' || ch == 'X' ) { /* HEX */
for ( ; ; ) {
ch = GETCH();
if ( !isxdigit(ch) ) {
break;
}
if ( isdigit(ch) ) {
value = value * 16 + ch - '0';
} else if ( isupper(ch) ) {
value = value * 16 + ch - 'A' + 10;
} else {
value = value * 16 + ch - 'a' + 10;
}
}
}
if ( ch == '.' ) {
goto read_floating;
} else { /* octal */
while ( ch >= '0' && ch <= '7' ) {
value = value * 8 + ch - '0';
ch = GETCH();
}
}
goto ret_INT;
}
/* else decimal or floating */
read_floating:
cp = yytext;
while ( isdigit(ch) ) {
value = value * 10 + ch - '0';
*cp++ = ch;
ch = GETCH();
}
if ( ch != '.' && ch != 'e' && ch != 'E' ) {
goto ret_INT;
}
/* floating */
if ( ch == '.' ) {
*cp++ = ch;
/* reading floating */
ch = GETCH();
while ( isdigit(ch) ) {
*cp++ = ch;
ch = GETCH();
}
}
if ( ch == 'e' || ch == 'E' ) {
*cp++ = 'e';
ch = GETCH();
if ( ch == '+' || ch == '-' ) {
*cp++ = ch;
ch = GETCH();
}
while ( isdigit(ch) ) {
*cp++ = ch;
ch = GETCH();
}
}
UNGETCH(ch);
*cp = '\0';
yylval.val = nggen_make_enode_p(FLOAT_CONSTANT,
nggen_save_float(atof(yytext)));
return(CONSTANT);
ret_INT:
if ( ch == 'L' ) {
yylval.val = nggen_make_enode(LONG_CONSTANT, value);
} else {
UNGETCH(ch);
yylval.val = nggen_make_enode(INT_CONSTANT, value);
}
return(CONSTANT);
}