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new lexer 20/20

master
Allen Webster 2016-03-17 12:48:13 -04:00
parent 69a83d0ca5
commit 0f160be414
2 changed files with 266 additions and 71 deletions
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241
test/4cpp_new_lexer.h
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@ -344,6 +344,8 @@ enum Lex_State{
LS_number,
LS_number0,
LS_float,
LS_crazy_float0,
LS_crazy_float1,
LS_hex,
LS_comment_pre,
LS_comment,
@ -372,6 +374,17 @@ enum Lex_State{
LS_count
};
enum Lex_Int_State{
LSINT_default,
LSINT_u,
LSINT_l,
LSINT_L,
LSINT_ul,
LSINT_uL,
LSINT_ll,
LSINT_extra
};
enum Lex_INC_State{
LSINC_default,
LSINC_quotes,
@ -394,20 +407,13 @@ enum Lex_PP_State{
};
struct Lex_FSM{
unsigned short state;
char pp_state;
char state;
char int_state;
char emit_token;
char multi_line;
char completed;
};
struct Lex_Data{
Lex_FSM fsm;
char pp_state;
char completed;
int token_start;
};
lexer_link Lex_PP_State
cpp_pp_directive_to_state(Cpp_Token_Type type){
Lex_PP_State result = LSPP_default;
@ -490,8 +496,15 @@ cpp_push_token_nonalloc(Cpp_Token *out_tokens, int *token_i, Cpp_Token token){
}
}
struct Lex_Data{
Lex_FSM fsm;
char pp_state;
char completed;
int token_start;
};
lexer_link Lex_Data
cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *token_stack_out){
cpp_lex_nonalloc(Lex_Data lex_data, char *chunk, int file_absolute_pos, int size, int last_chunk, Cpp_Token_Stack *token_stack_out){
Cpp_Token *out_tokens = token_stack_out->tokens;
int token_i = token_stack_out->count;
int max_token_i = token_stack_out->max_count;
@ -500,12 +513,14 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
int pos = file_absolute_pos;
int end_pos = size + file_absolute_pos;
Lex_Data lex_data = {0};
Lex_FSM fsm = {0};
int stream_end_pos = 0x7FFFFFFF;
char c = 0;
if (last_chunk){
stream_end_pos = end_pos;
++end_pos;
}
chunk -= file_absolute_pos;
for (; pos < end_pos && token_i < max_token_i;){
@ -525,10 +540,9 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
lex_data.token_start = pos;
fsm = {0};
fsm.pp_state = lex_data.pp_state;
for (; fsm.emit_token == 0 && pos <= end_pos;){
if (pos < end_pos){
lex_data.fsm = {0};
for (; lex_data.fsm.emit_token == 0 && pos < end_pos;){
if (pos < stream_end_pos){
c = chunk[pos++];
}
else{
@ -537,10 +551,11 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
}
{
unsigned short state = fsm.state;
char pp_state = fsm.pp_state;
char emit_token = fsm.emit_token;
char multi_line = fsm.multi_line;
char pp_state = lex_data.pp_state;
char state = lex_data.fsm.state;
char emit_token = lex_data.fsm.emit_token;
char multi_line = lex_data.fsm.multi_line;
switch (pp_state){
case LSPP_error:
@ -671,13 +686,14 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
case LS_char:
switch(c){
case '\'': emit_token = 1; break;
case '\\': state = LS_char_slashed; multi_line |= 1; break;
case '\\': state = LS_char_slashed; break;
}
break;
case LS_char_slashed:
switch (c){
case '\r': case '\f': case '\v': break;
case '\n': state = LS_string; multi_line |= 1; break;
default: state = LS_char; break;
}
break;
@ -685,13 +701,14 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
case LS_string:
switch(c){
case '\"': emit_token = 1; break;
case '\\': state = LS_string_slashed; multi_line |= 1; break;
case '\\': state = LS_string_slashed; break;
}
break;
case LS_string_slashed:
switch (c){
case '\r': case '\f': case '\v': break;
case '\n': state = LS_string; multi_line |= 1; break;
default: state = LS_string; break;
}
break;
@ -726,12 +743,31 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
case LS_float:
if (!(c >= '0' && c <= '9')){
switch (c){
case 'f': emit_token = 1; break;
case 'e': state = LS_crazy_float0; break;
default: emit_token = 1; break;
}
}
break;
case LS_crazy_float0:
{
if ((c >= '0' && c <= '9') || c == '-'){
state = LS_crazy_float1;
}
else{
emit_token = 1;
}
}
break;
case LS_crazy_float1:
{
if (!(c >= '0' && c <= '9')){
emit_token = 1;
}
}
break;
case LS_hex:
if (!(c >= '0' && c <= '9' || c >= 'a' && c <= 'f' || c >= 'A' && c <= 'F')){
emit_token = 1;
@ -904,17 +940,17 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
break;
}
fsm.state = state;
fsm.pp_state = pp_state;
fsm.emit_token = emit_token;
fsm.multi_line = multi_line;
lex_data.pp_state = pp_state;
lex_data.fsm.state = state;
lex_data.fsm.emit_token = emit_token;
lex_data.fsm.multi_line = multi_line;
}
}
if (fsm.emit_token){
if (lex_data.fsm.emit_token){
if (lex_data.pp_state == LSPP_include){
switch (fsm.state){
switch (lex_data.fsm.state){
case LSINC_default:break;
case LSINC_quotes:
@ -929,7 +965,7 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
break;
}
}
else switch (fsm.state){
else switch (lex_data.fsm.state){
case LS_default:
switch (c){
#define OperCase(op,t) case op: token.type = t; break;
@ -949,8 +985,27 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
OperCase('@', CPP_TOKEN_JUNK);
OperCase('$', CPP_TOKEN_JUNK);
OperCase('\\', CPP_TOKEN_JUNK);
#undef OperCase
case '\\':
if (lex_data.pp_state == LSPP_default){
token.type = CPP_TOKEN_JUNK;
}
else{
int restore_point = pos;
c = chunk[pos];
while (c == ' ' || c == '\t' || c == '\r' || c == '\v' || c == '\f'){
c = chunk[pos++];
}
if (c == '\n'){
lex_data.fsm.emit_token = 0;
}
else{
pos = restore_point;
token.type = CPP_TOKEN_JUNK;
}
}
break;
}
if (c != '@' && c != '$' && c != '\\'){
token.flags = CPP_TFLAG_IS_OPERATOR;
@ -996,11 +1051,11 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
}break;
case LS_pound:
token.flags = CPP_TFLAG_IS_OPERATOR;
token.flags = 0;
switch (c){
case '=': token.type = CPP_TOKEN_LESSEQ; break;
case '#': token.type = CPP_PP_CONCAT; break;
default:
token.type = CPP_TOKEN_LESS;
token.type = CPP_PP_STRINGIFY;
--pos;
break;
}
@ -1036,19 +1091,99 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
case LS_number:
case LS_number0:
case LS_hex:
lex_data.fsm.int_state = LSINT_default;
{
int done = 0;
--pos;
for (; done == 0 && pos <= end_pos;){
if (pos < end_pos){
c = chunk[pos++];
}
else{
c = 0;
++pos;
}
switch (lex_data.fsm.int_state){
case LSINT_default:
switch (c){
case 'u': case 'U': lex_data.fsm.int_state = LSINT_u; break;
case 'l': lex_data.fsm.int_state = LSINT_l; break;
case 'L': lex_data.fsm.int_state = LSINT_L; break;
default: done = 1; break;
}
break;
case LSINT_u:
switch (c){
case 'l': lex_data.fsm.int_state = LSINT_ul; break;
case 'L': lex_data.fsm.int_state = LSINT_uL; break;
default: done = 1; break;
}
break;
case LSINT_l:
switch (c){
case 'l': lex_data.fsm.int_state = LSINT_ll; break;
case 'U': case 'u': lex_data.fsm.int_state = LSINT_extra; break;
default: done = 1; break;
}
break;
case LSINT_L:
switch (c){
case 'L': lex_data.fsm.int_state = LSINT_ll; break;
case 'U': case 'u': lex_data.fsm.int_state = LSINT_extra; break;
default: done = 1; break;
}
break;
case LSINT_ul:
switch (c){
case 'l': lex_data.fsm.int_state = LSINT_extra; break;
default: done = 1; break;
}
break;
case LSINT_uL:
switch (c){
case 'L': lex_data.fsm.int_state = LSINT_extra; break;
default: done = 1; break;
}
break;
case LSINT_ll:
switch (c){
case 'u': case 'U': lex_data.fsm.int_state = LSINT_extra; break;
default: done = 1; break;
}
break;
case LSINT_extra:
done = 1;
break;
}
}
--pos;
}
token.type = CPP_TOKEN_INTEGER_CONSTANT;
token.flags = 0;
--pos;
break;
case LS_float:
case LS_crazy_float0:
case LS_crazy_float1:
token.type = CPP_TOKEN_FLOATING_CONSTANT;
token.flags = 0;
if (c != 'f'){
--pos;
}
switch (c){
case 'f': case 'F':
case 'l': case 'L':break;
default: --pos; break;
}
break;
case LS_char:
token.type = CPP_TOKEN_CHARACTER_CONSTANT;
token.flags = 0;
@ -1280,7 +1415,7 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
switch (c){
case '=': token.type = CPP_TOKEN_NOTEQ; break;
default:
token.type = CPP_TOKEN_BIT_NOT;
token.type = CPP_TOKEN_NOT;
--pos;
break;
}
@ -1297,7 +1432,7 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
break;
case LSPP_macro_identifier:
if (fsm.state != LS_identifier){
if (lex_data.fsm.state != LS_identifier){
token.type = CPP_TOKEN_JUNK;
lex_data.pp_state = LSPP_junk;
}
@ -1307,7 +1442,7 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
break;
case LSPP_identifier:
if (fsm.state != LS_identifier){
if (lex_data.fsm.state != LS_identifier){
token.type = CPP_TOKEN_JUNK;
}
lex_data.pp_state = LSPP_junk;
@ -1328,14 +1463,16 @@ cpp_lex_nonalloc(char *chunk, int file_absolute_pos, int size, Cpp_Token_Stack *
break;
}
}
if (lex_data.fsm.emit_token){
token.start = lex_data.token_start;
token.size = pos - lex_data.token_start;
token.flags |= (lex_data.fsm.multi_line)?(CPP_TFLAG_MULTILINE):(0);
token.flags |= (lex_data.pp_state != LSPP_default)?(CPP_TFLAG_PP_BODY):(0);
token.state_flags = lex_data.pp_state;
token.start = lex_data.token_start;
token.size = pos - lex_data.token_start;
token.flags |= (fsm.multi_line)?(CPP_TFLAG_MULTILINE):(0);
token.flags |= (fsm.pp_state != LSPP_default)?(CPP_TFLAG_PP_BODY):(0);
token.state_flags = fsm.pp_state;
cpp_push_token_nonalloc(out_tokens, &token_i, token);
cpp_push_token_nonalloc(out_tokens, &token_i, token);
}
}
}

96
test/experiment.cpp
View File

@ -20,6 +20,7 @@
#include "4cpp_new_lexer.h"
#include <windows.h>
#include <intrin.h>
#include <stdio.h>
#include <stdlib.h>
@ -180,12 +181,17 @@ struct Experiment{
int passed_total, test_total;
};
i64 handcoded_lexer_time = 0;
i64 fsm_lexer_time = 0;
static void
run_experiment(Experiment *exp, char *filename, int verbose){
run_experiment(Experiment *exp, char *filename, int verbose, int chunks){
String extension = {};
Data file_data;
Cpp_File file_cpp;
new_lex::Lex_Data ld = {0};
int pass;
int k, chunk_size, is_last;
extension = file_extension(make_string_slowly(filename));
@ -193,7 +199,7 @@ run_experiment(Experiment *exp, char *filename, int verbose){
file_data = dump_file(filename);
if (file_data.size < (100 << 10)){
pass = 1;
printf("testing on file: %s\n", filename);
if (verbose >= 0) printf("testing on file: %s\n", filename);
exp->test_total++;
exp->correct_stack.count = 0;
@ -205,13 +211,38 @@ run_experiment(Experiment *exp, char *filename, int verbose){
file_cpp.data = (char*)file_data.data;
file_cpp.size = file_data.size;
cpp_lex_file_nonalloc(file_cpp, &exp->correct_stack, lex_data);
new_lex::cpp_lex_nonalloc((char*)file_data.data, 0, file_data.size, &exp->testing_stack);
{
i64 start;
start = __rdtsc();
cpp_lex_file_nonalloc(file_cpp, &exp->correct_stack, lex_data);
handcoded_lexer_time += (__rdtsc() - start);
start = __rdtsc();
if (chunks){
is_last = 0;
for (k = 0; k < file_data.size; k += chunks){
chunk_size = chunks;
if (chunk_size + k >= file_data.size){
chunk_size = file_data.size - k;
is_last = 1;
}
ld = new_lex::cpp_lex_nonalloc(ld, (char*)file_data.data + k, k, is_last, chunk_size, &exp->testing_stack);
}
}
else{
new_lex::cpp_lex_nonalloc(ld, (char*)file_data.data, 0, file_data.size, 1, &exp->testing_stack);
}
fsm_lexer_time += (__rdtsc() - start);
}
if (exp->correct_stack.count != exp->testing_stack.count){
pass = 0;
printf("error: stack size mismatch %d original and %d testing\n",
exp->correct_stack.count, exp->testing_stack.count);
if (verbose >= 0){
printf("error: stack size mismatch %d original and %d testing\n",
exp->correct_stack.count, exp->testing_stack.count);
}
}
int min_count = exp->correct_stack.count;
@ -224,12 +255,12 @@ run_experiment(Experiment *exp, char *filename, int verbose){
if (correct->type != testing->type){
pass = 0;
if (verbose) printf("type mismatch at token %d\n", j);
if (verbose >= 1) printf("type mismatch at token %d\n", j);
}
if (correct->start != testing->start || correct->size != testing->size){
pass = 0;
if (verbose){
if (verbose >= 1){
printf("token range mismatch at token %d\n"
" %d:%d original %d:%d testing\n"
" %.*s original %.*s testing\n",
@ -239,19 +270,19 @@ run_experiment(Experiment *exp, char *filename, int verbose){
testing->size, file_cpp.data + testing->start);
}
}
if (correct->flags != testing->flags){
pass = 0;
if (verbose) printf("token flag mismatch at token %d\n", j);
if (verbose >= 1) printf("token flag mismatch at token %d\n", j);
}
}
if (pass){
exp->passed_total++;
printf("test passed!\n\n");
if (verbose >= 0) printf("test passed!\n\n");
}
else{
printf("test failed, you failed, fix it now!\n\n");
if (verbose >= 0) printf("test failed, you failed, fix it now!\n\n");
}
}
@ -262,6 +293,9 @@ run_experiment(Experiment *exp, char *filename, int verbose){
#define BASE_DIR "w:/4ed/data/test/"
int main(){
int repeats = 100;
int verbose_level = -1;
int chunks = 0;
char test_directory[] = BASE_DIR;
File_List all_files = {};
Experiment exp = {};
@ -271,20 +305,44 @@ int main(){
AllowLocal(test_directory);
AllowLocal(all_files);
#if 0
run_experiment(&exp, BASE_DIR "lexer_test.cpp", 1);
(void)(repeats);
(void)(verbose_level);
run_experiment(&exp, BASE_DIR "crazywords.cpp", 1, chunks);
#else
system_set_file_list(&all_files, make_lit_string(test_directory));
for (int i = 0; i < all_files.count; ++i){
if (all_files.infos[i].folder == 0){
run_experiment(&exp, all_files.infos[i].filename.str, 0);
for (int j = 0; j < repeats; ++j){
for (int i = 0; i < all_files.count; ++i){
if (all_files.infos[i].folder == 0){
run_experiment(&exp, all_files.infos[i].filename.str, verbose_level, chunks);
}
}
}
#endif
printf("you passed %d / %d tests\n", exp.passed_total, exp.test_total);
#define OUTLINE(type) "%-30s "type"\n"
#define OUTLINE_VAR(t, var) #var, (t)var
if (exp.passed_total == exp.test_total && exp.passed_total > 1){
f32 speed_up = ((f32)handcoded_lexer_time) / fsm_lexer_time;
printf(
"\nTime information for %d repeates\n"
OUTLINE("%d")
OUTLINE("%d")
OUTLINE("%f"),
repeats,
OUTLINE_VAR(i32, handcoded_lexer_time),
OUTLINE_VAR(i32, fsm_lexer_time),
OUTLINE_VAR(f32, speed_up)
);
}
return(0);
}