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|
/*
*
*/
%{
#include <string.h>
#include "tokens.h"
#include "engine.h"
int rubylexreal_column = 0;
int rubylex_column = 0;
int rubylex_lineno = 1;
//int yyclength = 0;
int yyrubysize = 0;
char *yyrubycomment = NULL;
// Forward declaration
static void count(void);
static int identifier(void);
static void reset_comment(void);
static int rubystyle_comment(void);
static void ruby_accumulate_comment(char *data, int length);
static void no_match(void);
static void gobble_string(char c);
static void scan_yytext(void);
#define YY_INPUT(buf, result, max_size) \
if (((result = fread(buf, 1, max_size, yyin)) == 0) && ferror(yyin)) { \
YY_FATAL_ERROR("input in flex scanner failed"); \
} else if (result) { \
char *c, *end = (buf) + result - 1; \
for (c = (buf); c < end; c++) { \
if (*c == '\r') *c = ' '; \
if (*c == '\\' && *(c + 1) == '\n') { \
memmove(c + 1, c + 2, end - c); \
result--; \
end--; \
*c = '\r'; \
} \
} \
if (*end == '\r') *end = ' '; \
if (*end == '\\') { \
result--; \
fseek(yyin, -1, SEEK_CUR); \
} \
}
%}
%%
"#".* { count(); reset_comment();
ruby_accumulate_comment(yytext+1,strlen(yytext+1));
return TOKEN_COMMENT; }
[\n\r] { count(); rubylex_lineno++; return TOKEN_NEWLINE; }
[ \t\v\f] { count(); }
^[ \r\t]*"#".*\n { count(); rubylex_lineno++; }
=begin {count();return rubystyle_comment();}
alias {count(); return TOKEN_ALIAS ;}
and {count(); return TOKEN_AND ;}
BEGIN {count(); return TOKEN_BEGIN ;}
begin {count(); return TOKEN_BEGIN ;}
break {count(); return TOKEN_BREAK ;}
case {count(); return TOKEN_CASE ;}
class {count(); return TOKEN_CLASS ;}
def {count(); return TOKEN_DEF ;}
defined {count(); return TOKEN_DEFINED ;}
do {count(); return TOKEN_DO ;}
else {count(); return TOKEN_ELSE ;}
elsif {count(); return TOKEN_ELSIF ;}
END {count(); return TOKEN_END ;}
end {count(); return TOKEN_END ;}
ensure {count(); return TOKEN_ENSURE ;}
false {count(); return TOKEN_FALSE ;}
for {count(); return TOKEN_FOR ;}
if {count(); return TOKEN_IF ;}
in {count(); return TOKEN_IN ;}
module {count(); return TOKEN_MODULE ;}
next {count(); return TOKEN_NEXT ;}
nil {count(); return TOKEN_NIL ;}
not {count(); return TOKEN_NOT ;}
or {count(); return TOKEN_OR ;}
redo {count(); return TOKEN_REDO ;}
rescue {count(); return TOKEN_RESCUE ;}
retry {count(); return TOKEN_RETRY ;}
return {count(); return TOKEN_RETURN ;}
self {count(); return TOKEN_SELF ;}
super {count(); return TOKEN_SUPER ;}
then {count(); return TOKEN_THEN ;}
true {count(); return TOKEN_TRUE ;}
undef {count(); return TOKEN_UNDEF ;}
unless {count(); return TOKEN_UNLESS ;}
until {count(); return TOKEN_UNTIL ;}
when {count(); return TOKEN_WHEN ;}
while {count(); return TOKEN_WHILE ;}
yield {count(); return TOKEN_YIELD ;}
("\'") { count();gobble_string('\''); return TOKEN_SSTRING_LITERAL; }
("\"") { count();gobble_string('"'); return TOKEN_SSTRING_LITERAL; }
0[xX][a-fA-F0-9]+(l|L)* {count(); return TOKEN_HEX_CONST; }
0[0-9]+(l|L)* {count(); return TOKEN_OCT_CONST; }
[0-9]+(l|L)* {count(); return TOKEN_DEC_CONST; }
[0-9]+[Ee][+-]?[0-9]+ {count(); return TOKEN_FLOAT_CONST; }
[0-9]*"."[0-9]+([Ee][+-]?[0-9]+)? {count(); return TOKEN_FLOAT_CONST; }
[0-9]+"."[0-9]*([Ee][+-]?[0-9]+)? {count(); return TOKEN_FLOAT_CONST; }
[1-9][0-9]*(j|J) {count(); return TOKEN_IMAG_CONST; }
[0-9]+[Ee][+-]?[0-9]+(j|J) {count(); return TOKEN_IMAG_CONST; }
[0-9]*"."[0-9]+([Ee][+-]?[0-9]+)?(j|J) {count(); return TOKEN_IMAG_CONST; }
[0-9]+"."[0-9]*([Ee][+-]?[0-9]+)?(j|J) {count(); return TOKEN_IMAG_CONST; }
"/".*"/" {count(); return TOKEN_REGEXP; }
@[a-zA-Z_0-9\r]* {count(); return TOKEN_INSTANCE_VARIABLE; }
@@[a-zA-Z_0-9\r]* {count(); return TOKEN_CLASS_VARIABLE; }
$[a-zA-Z_0-9\r]* {count(); return TOKEN_GLOBAL_VARIABLE; }
[a-zA-Z_][a-zA-Z_0-9\?\!\r]* {count(); return identifier(); }
">>=" {count(); return TOKEN_RIGHT_ASSIGN; }
"<<=" {count(); return TOKEN_LEFT_ASSIGN; }
"**=" {count(); return TOKEN_EXP_ASSIGN; }
"+=" {count(); return TOKEN_ADD_ASSIGN; }
"-=" {count(); return TOKEN_SUB_ASSIGN; }
"*=" {count(); return TOKEN_MUL_ASSIGN; }
"/=" {count(); return TOKEN_DIV_ASSIGN; }
"%=" {count(); return TOKEN_MOD_ASSIGN; }
"&=" {count(); return TOKEN_AND_ASSIGN; }
"|=" {count(); return TOKEN_OR_ASSIGN; }
"^=" {count(); return TOKEN_XOR_ASSIGN; }
">>" {count(); return TOKEN_RIGHT_OP; }
"<<" {count(); return TOKEN_LEFT_OP; }
"**" {count(); return TOKEN_EXP_OP; }
"<=" {count(); return TOKEN_LE_OP; }
">=" {count(); return TOKEN_GE_OP; }
"==" {count(); return TOKEN_EQ_OP; }
"!=" {count(); return TOKEN_NE_OP; }
"<>" {count(); return TOKEN_NE_OP; }
"&" {count(); return '&'; }
"~" {count(); return '~'; }
"-" {count(); return '-'; }
"+" {count(); return '+'; }
"*" {count(); return '*'; }
"/" {count(); return '/'; }
"\\" {count(); return '\\'; }
"%" {count(); return '%'; }
"<" {count(); return '<'; }
">" {count(); return '>'; }
"^" {count(); return '^'; }
"|" {count(); return '|'; }
"`" {count(); return '`'; }
"(" {count(); return '('; }
")" {count(); return ')'; }
"[" {count(); return '['; }
"]" {count(); return ']'; }
"{" {count(); return '{'; }
"}" {count(); return '}'; }
"," {count(); return ','; }
":" {count(); return ':'; }
"." {count(); return '.'; }
"=" {count(); return '='; }
";" {count(); return ';'; }
"!" {count(); return '!'; }
"?" {count(); return '?'; }
. { count();no_match(); }
%%
int yywrap(void)
{
return 1;
}
static void
count()
{
int i;
if (rubylexreal_column != 0)
{
rubylex_column = rubylexreal_column+1;
}
for (i = 0; yytext[i] != '\0'; i++)
{
if (yytext[i] == '\n')
{
rubylexreal_column = 0;
rubylex_column = 0;
} else if (yytext[i] == '\t') {
rubylexreal_column += 8 - (rubylexreal_column % 8);
}else {
rubylexreal_column++;
}
}
}
static
void gobble_string(char which)
{
int bslash = 0;
char c;
while ((c = input()) && c != -1)
{
rubylexreal_column++;
switch(c) {
case '\\':
if (!bslash)
bslash = 1;
else
bslash = 0;
break;
case '\n':
rubylexreal_column = 0;
rubylex_column = 0;
rubylex_lineno++;
bslash = 0;
break;
default:
if (c == which && !bslash) {
return;
}
bslash = 0;
break;
}
}
}
static
void scan_yytext(void)
{
char *tmp;
tmp = yytext;
while(*tmp) {
if(*tmp == '\n' || *tmp == '\r')
{
rubylexreal_column = 0;
rubylex_column = 0;
rubylex_lineno++;
}
tmp++;
}
}
static
int identifier(void)
{
char * c;
while ((c = strchr(yytext, '\r')) != (char *)NULL)
{
memmove(c, c + 1, strlen(c));
rubylexreal_column = 0;
rubylex_column = 0;
rubylex_lineno++;
}
return TOKEN_IDENTIFIER;
}
static
void no_match(void)
{
fprintf(stderr, "%s:%d: warning: bad token `%s'\n", current_file, rubylex_lineno, yytext);
}
static
void ruby_accumulate_comment(char *data, int length)
{
int need = 0;
char * text = yyrubycomment;
need = yyclength + length + 1;
need = (need + 127) / 128 * 128;
if (need > yyrubysize)
{
text = (char *)(yyrubysize ? realloc(yyrubycomment, need) : malloc(need));
if (text == (char *)NULL)
return;
yyrubysize = need;
yyrubycomment = text;
}
memcpy(yyrubycomment + yyclength, data, length);
yyclength += length;
*(yyrubycomment + yyclength) = '\0';
}
static
void reset_comment(void)
{
if (yyrubycomment != (char *)NULL)
*yyrubycomment = '\0';
yyclength = 0;
}
static
int rubystyle_comment(void)
{
char c;
int i;
int flag = 0;
reset_comment();
while ((c = input()) && c != -1)
{
rubylexreal_column++;
ruby_accumulate_comment(&c, 1);
if (c == '\n' || c == '\r')
{
rubylexreal_column = 0;
rubylex_column = 0;
rubylex_lineno++;
}
while (c == '=')
{
char tmp[4] = {0};
tmp[0] = '=';
rubylexreal_column++;
for (i = 1; i < 4; i++)
{
if (!(c = input()) || c == -1) {
return TOKEN_COMMENT;
}
if (c == '\n' || c == '\r')
{
rubylexreal_column = 0;
rubylex_column = 0;
rubylex_lineno++;
}
if (c == '=')
{
ruby_accumulate_comment(tmp, i);
flag = 1;
break;
}
tmp[i] = c;
}
if (flag == 1)
{
flag = 0;
continue;
}
if (!memcmp(tmp,"=end",sizeof(tmp))) {
return TOKEN_COMMENT;
} else
{
ruby_accumulate_comment(tmp, sizeof(tmp));
}
}
}
return TOKEN_COMMENT;
}
|
