723 lines
21 KiB
C++
723 lines
21 KiB
C++
/*
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* FSM table generator:
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* Generate FSM tables as ".c" files from FSM functions.
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*
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* 23.03.2016 (dd.mm.yyyy)
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*/
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// TOP
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#define ArrayCount(a) (sizeof(a)/sizeof(*a))
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#include "4cpp_lexer_fsms.h"
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Whitespace_FSM
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whitespace_skip_fsm(Whitespace_FSM wfsm, char c){
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if (wfsm.pp_state != LSPP_default){
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if (c == '\n') wfsm.pp_state = LSPP_default;
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}
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if (!(c == ' ' || c == '\n' || c == '\t' || c == '\r' || c == '\f' || c == '\v')){
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wfsm.white_done = 1;
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}
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return(wfsm);
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}
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Lex_FSM
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int_fsm(Lex_FSM fsm, char c){
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switch (fsm.int_state){
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case LSINT_default:
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switch (c){
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case 'u': case 'U': fsm.int_state = LSINT_u; break;
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case 'l': fsm.int_state = LSINT_l; break;
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case 'L': fsm.int_state = LSINT_L; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LSINT_u:
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switch (c){
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case 'l': fsm.int_state = LSINT_ul; break;
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case 'L': fsm.int_state = LSINT_uL; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LSINT_l:
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switch (c){
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case 'l': fsm.int_state = LSINT_ll; break;
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case 'U': case 'u': fsm.int_state = LSINT_extra; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LSINT_L:
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switch (c){
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case 'L': fsm.int_state = LSINT_ll; break;
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case 'U': case 'u': fsm.int_state = LSINT_extra; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LSINT_ul:
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switch (c){
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case 'l': fsm.int_state = LSINT_extra; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LSINT_uL:
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switch (c){
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case 'L': fsm.int_state = LSINT_extra; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LSINT_ll:
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switch (c){
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case 'u': case 'U': fsm.int_state = LSINT_extra; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LSINT_extra:
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fsm.emit_token = 1;
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break;
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}
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return(fsm);
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}
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Lex_FSM
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main_fsm(Lex_FSM fsm, unsigned char pp_state, unsigned char c){
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if (c == 0) fsm.emit_token = 1;
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else
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switch (pp_state){
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case LSPP_error:
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fsm.state = LS_error_message;
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if (c == '\n') fsm.emit_token = 1;
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break;
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case LSPP_include:
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switch (fsm.state){
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case LSINC_default:
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switch (c){
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case '"': fsm.state = LSINC_quotes; break;
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case '<': fsm.state = LSINC_pointy; break;
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default: fsm.state = LSINC_junk; break;
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}
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break;
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case LSINC_quotes:
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if (c == '"') fsm.emit_token = 1;
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break;
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case LSINC_pointy:
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if (c == '>') fsm.emit_token = 1;
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break;
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case LSINC_junk:
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if (c == '\n') fsm.emit_token = 1;
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break;
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}
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break;
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default:
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switch (fsm.state){
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case LS_default:
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if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_'){
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fsm.state = LS_identifier;
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}
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else if (c >= '1' && c <= '9'){
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fsm.state = LS_number;
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}
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else if (c == '0'){
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fsm.state = LS_number0;
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}
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else switch (c){
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case '\'': fsm.state = LS_char; break;
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case '"': fsm.state = LS_string; break;
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case '/': fsm.state = LS_comment_pre; break;
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case '.': fsm.state = LS_dot; break;
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case '<': fsm.state = LS_less; break;
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case '>': fsm.state = LS_more; break;
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case '-': fsm.state = LS_minus; break;
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case '&': fsm.state = LS_and; break;
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case '|': fsm.state = LS_or; break;
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case '+': fsm.state = LS_plus; break;
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case ':': fsm.state = LS_colon; break;
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case '*': fsm.state = LS_star; break;
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case '%': fsm.state = LS_modulo; break;
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case '^': fsm.state = LS_caret; break;
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case '=': fsm.state = LS_eq; break;
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case '!': fsm.state = LS_bang; break;
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case '#': fsm.state = LS_pound; break;
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#define OperCase(op,type) case op: fsm.emit_token = 1; break;
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OperCase('{', CPP_TOKEN_BRACE_OPEN);
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OperCase('}', CPP_TOKEN_BRACE_CLOSE);
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OperCase('[', CPP_TOKEN_BRACKET_OPEN);
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OperCase(']', CPP_TOKEN_BRACKET_CLOSE);
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OperCase('(', CPP_TOKEN_PARENTHESE_OPEN);
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OperCase(')', CPP_TOKEN_PARENTHESE_CLOSE);
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OperCase('~', CPP_TOKEN_TILDE);
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OperCase(',', CPP_TOKEN_COMMA);
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OperCase(';', CPP_TOKEN_SEMICOLON);
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OperCase('?', CPP_TOKEN_TERNARY_QMARK);
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OperCase('@', CPP_TOKEN_JUNK);
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OperCase('$', CPP_TOKEN_JUNK);
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OperCase('\\', CPP_TOKEN_JUNK);
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#undef OperCase
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}
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break;
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case LS_identifier:
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if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')){
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fsm.emit_token = 1;
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}
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break;
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case LS_pound:
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if (pp_state == LSPP_default){
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if (c == ' ' || c == '\t' || c == '\r' || c == '\f' || c == '\v'){
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fsm.state = LS_pound;
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}
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else if (c == '\n'){
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fsm.emit_token = 1;
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}
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else{
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fsm.state = LS_pp;
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}
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}
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else{
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switch (c){
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case '#': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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}
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break;
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case LS_pp:
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if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')){
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fsm.emit_token = 1;
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}
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break;
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case LS_char:
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case LS_char_multiline:
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switch(c){
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case '\'': fsm.emit_token = 1; break;
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case '\\': fsm.state = LS_char_slashed; break;
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}
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break;
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case LS_char_slashed:
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switch (c){
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case '\r': case '\f': case '\v': break;
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case '\n': fsm.state = LS_char_multiline; break;
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default: fsm.state = LS_char; break;
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}
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break;
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case LS_string:
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case LS_string_multiline:
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switch(c){
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case '\"': fsm.emit_token = 1; break;
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case '\\': fsm.state = LS_string_slashed; break;
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}
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break;
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case LS_string_slashed:
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switch (c){
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case '\r': case '\f': case '\v': break;
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case '\n': fsm.state = LS_string_multiline; break;
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default: fsm.state = LS_string; break;
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}
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break;
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case LS_number:
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if (c >= '0' && c <= '9'){
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fsm.state = LS_number;
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}
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else{
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switch (c){
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case '.': fsm.state = LS_float; break;
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default: fsm.emit_token = 1; break;
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}
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}
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break;
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case LS_number0:
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if (c >= '0' && c <= '9'){
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fsm.state = LS_number;
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}
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else if (c == 'x'){
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fsm.state = LS_hex;
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}
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else if (c == '.'){
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fsm.state = LS_float;
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}
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else{
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fsm.emit_token = 1;
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}
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break;
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case LS_float:
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if (!(c >= '0' && c <= '9')){
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switch (c){
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case 'e': fsm.state = LS_crazy_float0; break;
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default: fsm.emit_token = 1; break;
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}
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}
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break;
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case LS_crazy_float0:
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{
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if ((c >= '0' && c <= '9') || c == '-'){
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fsm.state = LS_crazy_float1;
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}
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else{
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fsm.emit_token = 1;
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}
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}
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break;
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case LS_crazy_float1:
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{
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if (!(c >= '0' && c <= '9')){
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fsm.emit_token = 1;
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}
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}
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break;
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case LS_hex:
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if (!(c >= '0' && c <= '9' || c >= 'a' && c <= 'f' || c >= 'A' && c <= 'F')){
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fsm.emit_token = 1;
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}
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break;
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case LS_dot:
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if (c >= '0' && c <= '9'){
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fsm.state = LS_float;
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}
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else
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switch (c){
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case '.': fsm.state = LS_ellipsis; break;
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case '*': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_ellipsis: fsm.emit_token = 1; break;
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case LS_less:
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switch (c){
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case '<': fsm.state = LS_less_less; break;
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_less_less:
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switch (c){
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_more:
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switch (c){
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case '>': fsm.state = LS_more_more; break;
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_more_more:
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switch (c){
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_comment_pre:
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switch (c){
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case '/': fsm.state = LS_comment; break;
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case '*': fsm.state = LS_comment_block; break;
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_comment:
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switch (c){
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case '\\': fsm.state = LS_comment_slashed; break;
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case '\n': fsm.emit_token = 1; break;
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}
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break;
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case LS_comment_slashed:
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switch (c){
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case '\r': case '\f': case '\v': break;
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default: fsm.state = LS_comment; break;
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}
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break;
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case LS_comment_block:
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switch (c){
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case '*': fsm.state = LS_comment_block_ending; break;
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}
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break;
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case LS_comment_block_ending:
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switch (c){
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case '*': fsm.state = LS_comment_block_ending; break;
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case '/': fsm.emit_token = 1; break;
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default: fsm.state = LS_comment_block; break;
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}
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break;
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case LS_minus:
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switch (c){
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case '>': fsm.state = LS_arrow; break;
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case '-': fsm.emit_token = 1; break;
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_arrow:
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switch (c){
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case '*': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_and:
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switch (c){
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case '&': fsm.emit_token = 1; break;
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_or:
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switch (c){
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case '|': fsm.emit_token = 1; break;
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_plus:
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switch (c){
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case '+': fsm.emit_token = 1; break;
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_colon:
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switch (c){
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case ':': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_star:
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switch (c){
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_modulo:
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switch (c){
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_caret:
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switch (c){
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_eq:
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switch (c){
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
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break;
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case LS_bang:
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switch (c){
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case '=': fsm.emit_token = 1; break;
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default: fsm.emit_token = 1; break;
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}
|
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break;
|
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}
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break;
|
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}
|
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return(fsm);
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}
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|
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void
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begin_table(FILE *file, char *type, char *group_name, char *table_name){
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fprintf(file, "unsigned %s %s_%s[] = {\n", type, group_name, table_name);
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}
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void
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begin_table(FILE *file, char *type, char *table_name){
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fprintf(file, "unsigned %s %s[] = {\n", type, table_name);
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}
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|
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void
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begin_ptr_table(FILE *file, char *type, char *table_name){
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fprintf(file, "unsigned %s * %s[] = {\n", type, table_name);
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}
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|
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void
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do_table_item(FILE *file, unsigned short item){
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|
fprintf(file, "%2d,", (int)item);
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}
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|
|
void
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do_table_item_direct(FILE *file, char *item, char *tail){
|
|
fprintf(file, "%s%s,", item, tail);
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}
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|
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void
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end_row(FILE *file){
|
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fprintf(file, "\n");
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}
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|
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void
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end_table(FILE *file){
|
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fprintf(file, "};\n\n");
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}
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|
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struct FSM_Tables{
|
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unsigned char *full_transition_table;
|
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unsigned char *marks;
|
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unsigned char *eq_class;
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unsigned char *eq_class_rep;
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unsigned char *reduced_transition_table;
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|
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unsigned char eq_class_counter;
|
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unsigned short state_count;
|
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};
|
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|
|
FSM_Tables
|
|
generate_whitespace_skip_table(){
|
|
unsigned char state_count = LSPP_count;
|
|
FSM_Tables table;
|
|
table.full_transition_table = (unsigned char*)malloc(state_count * 256);
|
|
table.marks = (unsigned char*)malloc(state_count * 256);
|
|
table.eq_class = (unsigned char*)malloc(state_count * 256);
|
|
table.eq_class_rep = (unsigned char*)malloc(state_count * 256);
|
|
table.state_count = state_count;
|
|
memset(table.marks, 0, 256);
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|
|
int i = 0;
|
|
Whitespace_FSM wfsm = {0};
|
|
Whitespace_FSM new_wfsm;
|
|
for (unsigned short c = 0; c < 256; ++c){
|
|
for (unsigned char state = 0; state < state_count; ++state){
|
|
wfsm.pp_state = state;
|
|
wfsm.white_done = 0;
|
|
new_wfsm = whitespace_skip_fsm(wfsm, (unsigned char)c);
|
|
table.full_transition_table[i++] = new_wfsm.pp_state + state_count*new_wfsm.white_done;
|
|
}
|
|
}
|
|
|
|
table.eq_class_counter = 0;
|
|
unsigned char *c_line = table.full_transition_table;
|
|
for (unsigned short c = 0; c < 256; ++c){
|
|
if (table.marks[c] == 0){
|
|
table.eq_class[c] = table.eq_class_counter;
|
|
table.eq_class_rep[table.eq_class_counter] = (unsigned char)c;
|
|
unsigned char *c2_line = c_line + state_count;
|
|
for (unsigned short c2 = c + 1; c2 < 256; ++c2){
|
|
if (memcmp(c_line, c2_line, state_count) == 0){
|
|
table.marks[c2] = 1;
|
|
table.eq_class[c2] = table.eq_class_counter;
|
|
}
|
|
c2_line += state_count;
|
|
}
|
|
++table.eq_class_counter;
|
|
}
|
|
c_line += state_count;
|
|
}
|
|
|
|
table.reduced_transition_table = (unsigned char*)malloc(state_count * table.eq_class_counter);
|
|
i = 0;
|
|
for (unsigned short eq = 0; eq < table.eq_class_counter; ++eq){
|
|
for (unsigned char state = 0; state < state_count; ++state){
|
|
wfsm.pp_state = state;
|
|
wfsm.white_done = 0;
|
|
new_wfsm = whitespace_skip_fsm(wfsm, table.eq_class_rep[eq]);
|
|
table.reduced_transition_table[i++] = new_wfsm.pp_state + state_count*new_wfsm.white_done;
|
|
}
|
|
}
|
|
|
|
return(table);
|
|
}
|
|
|
|
FSM_Tables
|
|
generate_fsm_table(unsigned char pp_state){
|
|
unsigned char state_count = LS_count;
|
|
FSM_Tables table;
|
|
table.full_transition_table = (unsigned char*)malloc(state_count * 256);
|
|
table.marks = (unsigned char*)malloc(state_count * 256);
|
|
table.eq_class = (unsigned char*)malloc(state_count * 256);
|
|
table.eq_class_rep = (unsigned char*)malloc(state_count * 256);
|
|
table.state_count = state_count;
|
|
memset(table.marks, 0, 256);
|
|
|
|
int i = 0;
|
|
Lex_FSM fsm = {0};
|
|
Lex_FSM new_fsm;
|
|
for (unsigned short c = 0; c < 256; ++c){
|
|
for (unsigned char state = 0; state < state_count; ++state){
|
|
fsm.state = state;
|
|
fsm.emit_token = 0;
|
|
new_fsm = main_fsm(fsm, pp_state, (unsigned char)c);
|
|
table.full_transition_table[i++] = new_fsm.state + state_count*new_fsm.emit_token;
|
|
}
|
|
}
|
|
|
|
table.eq_class_counter = 0;
|
|
unsigned char *c_line = table.full_transition_table;
|
|
for (unsigned short c = 0; c < 256; ++c){
|
|
if (table.marks[c] == 0){
|
|
table.eq_class[c] = table.eq_class_counter;
|
|
table.eq_class_rep[table.eq_class_counter] = (unsigned char)c;
|
|
unsigned char *c2_line = c_line + state_count;
|
|
for (unsigned short c2 = c + 1; c2 < 256; ++c2){
|
|
if (memcmp(c_line, c2_line, state_count) == 0){
|
|
table.marks[c2] = 1;
|
|
table.eq_class[c2] = table.eq_class_counter;
|
|
}
|
|
c2_line += state_count;
|
|
}
|
|
++table.eq_class_counter;
|
|
}
|
|
c_line += state_count;
|
|
}
|
|
|
|
table.reduced_transition_table = (unsigned char*)malloc(state_count * table.eq_class_counter);
|
|
i = 0;
|
|
for (unsigned short eq = 0; eq < table.eq_class_counter; ++eq){
|
|
for (unsigned char state = 0; state < state_count; ++state){
|
|
fsm.state = state;
|
|
fsm.emit_token = 0;
|
|
new_fsm = main_fsm(fsm, pp_state, table.eq_class_rep[eq]);
|
|
table.reduced_transition_table[i++] = new_fsm.state + state_count*new_fsm.emit_token;
|
|
}
|
|
}
|
|
|
|
return(table);
|
|
}
|
|
|
|
void
|
|
render_fsm_table(FILE *file, FSM_Tables tables, char *group_name){
|
|
begin_table(file, "short", group_name, "eq_classes");
|
|
for (unsigned short c = 0; c < 256; ++c){
|
|
do_table_item(file, tables.eq_class[c]*tables.state_count);
|
|
}
|
|
end_row(file);
|
|
end_table(file);
|
|
|
|
fprintf(file, "const int num_%s_eq_classes = %d;\n\n", group_name, tables.eq_class_counter);
|
|
|
|
int i = 0;
|
|
begin_table(file, "char", group_name, "table");
|
|
for (unsigned short c = 0; c < tables.eq_class_counter; ++c){
|
|
for (unsigned char state = 0; state < tables.state_count; ++state){
|
|
do_table_item(file, tables.reduced_transition_table[i++]);
|
|
}
|
|
end_row(file);
|
|
}
|
|
end_table(file);
|
|
}
|
|
|
|
struct PP_Names{
|
|
unsigned char pp_state;
|
|
char *name;
|
|
};
|
|
|
|
PP_Names pp_names[] = {
|
|
{LSPP_default, "main_fsm"},
|
|
{LSPP_include, "pp_include_fsm"},
|
|
{LSPP_macro_identifier, "pp_macro_fsm"},
|
|
{LSPP_identifier, "pp_identifier_fsm"},
|
|
{LSPP_body_if, "pp_body_if_fsm"},
|
|
{LSPP_body, "pp_body_fsm"},
|
|
{LSPP_number, "pp_number_fsm"},
|
|
{LSPP_error, "pp_error_fsm"},
|
|
{LSPP_junk, "pp_junk_fsm"},
|
|
};
|
|
|
|
int main(){
|
|
FILE *file;
|
|
file = fopen("4cpp_lexer_tables.c", "wb");
|
|
|
|
FSM_Tables wtables = generate_whitespace_skip_table();
|
|
render_fsm_table(file, wtables, "whitespace_fsm");
|
|
|
|
begin_table(file, "char", "multiline_state_table");
|
|
for (unsigned char state = 0; state < LS_count; ++state){
|
|
do_table_item(file, (state == LS_string_multiline || state == LS_char_multiline));
|
|
}
|
|
end_row(file);
|
|
end_table(file);
|
|
|
|
for (int i = 0; i < ArrayCount(pp_names); ++i){
|
|
assert(i == pp_names[i].pp_state);
|
|
FSM_Tables tables = generate_fsm_table(pp_names[i].pp_state);
|
|
render_fsm_table(file, tables, pp_names[i].name);
|
|
}
|
|
|
|
begin_ptr_table(file, "short", "get_eq_classes");
|
|
for (int i = 0; i < ArrayCount(pp_names); ++i){
|
|
do_table_item_direct(file, pp_names[i].name, "_eq_classes");
|
|
end_row(file);
|
|
}
|
|
end_table(file);
|
|
|
|
begin_ptr_table(file, "char", "get_table");
|
|
for (int i = 0; i < ArrayCount(pp_names); ++i){
|
|
do_table_item_direct(file, pp_names[i].name, "_table");
|
|
end_row(file);
|
|
}
|
|
end_table(file);
|
|
|
|
fclose(file);
|
|
return(0);
|
|
}
|
|
|
|
// BOTTOM
|
|
|
|
|