1329 lines
38 KiB
C++
1329 lines
38 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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/* TODO(allen):
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Next Time:
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Finish linking from one FSM to the next in the keyword recognizer.
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1. Make sure each FSM follows the rules about state types correctly.
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2. Make a look up table from final states to resulting token types.
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*/
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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_types.h"
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#include "4cpp_lexer_fsms.h"
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static String_And_Flag preprop_strings[] = {
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{"include", CPP_PP_INCLUDE},
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{"INCLUDE", CPP_PP_INCLUDE},
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{"ifndef", CPP_PP_IFNDEF},
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{"IFNDEF", CPP_PP_IFNDEF},
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{"define", CPP_PP_DEFINE},
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{"DEFINE", CPP_PP_DEFINE},
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{"import", CPP_PP_IMPORT},
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{"IMPORT", CPP_PP_IMPORT},
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{"pragma", CPP_PP_PRAGMA},
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{"PRAGMA", CPP_PP_PRAGMA},
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{"undef", CPP_PP_UNDEF},
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{"UNDEF", CPP_PP_UNDEF},
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{"endif", CPP_PP_ENDIF},
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{"ENDIF", CPP_PP_ENDIF},
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{"error", CPP_PP_ERROR},
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{"ERROR", CPP_PP_ERROR},
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{"ifdef", CPP_PP_IFDEF},
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{"IFDEF", CPP_PP_IFDEF},
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{"using", CPP_PP_USING},
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{"USING", CPP_PP_USING},
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{"else", CPP_PP_ELSE},
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{"ELSE", CPP_PP_ELSE},
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{"elif", CPP_PP_ELIF},
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{"ELIF", CPP_PP_ELIF},
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{"line", CPP_PP_LINE},
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{"LINE", CPP_PP_LINE},
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{"if", CPP_PP_IF},
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{"IF", CPP_PP_IF},
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};
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static String_And_Flag keyword_strings[] = {
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{"true", CPP_TOKEN_BOOLEAN_CONSTANT},
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{"false", CPP_TOKEN_BOOLEAN_CONSTANT},
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{"and", CPP_TOKEN_AND},
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{"and_eq", CPP_TOKEN_ANDEQ},
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{"bitand", CPP_TOKEN_BIT_AND},
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{"bitor", CPP_TOKEN_BIT_OR},
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{"or", CPP_TOKEN_OR},
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{"or_eq", CPP_TOKEN_OREQ},
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{"sizeof", CPP_TOKEN_SIZEOF},
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{"alignof", CPP_TOKEN_ALIGNOF},
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{"decltype", CPP_TOKEN_DECLTYPE},
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{"throw", CPP_TOKEN_THROW},
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{"new", CPP_TOKEN_NEW},
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{"delete", CPP_TOKEN_DELETE},
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{"xor", CPP_TOKEN_BIT_XOR},
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{"xor_eq", CPP_TOKEN_XOREQ},
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{"not", CPP_TOKEN_NOT},
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{"not_eq", CPP_TOKEN_NOTEQ},
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{"typeid", CPP_TOKEN_TYPEID},
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{"compl", CPP_TOKEN_BIT_NOT},
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{"void", CPP_TOKEN_KEY_TYPE},
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{"bool", CPP_TOKEN_KEY_TYPE},
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{"char", CPP_TOKEN_KEY_TYPE},
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{"int", CPP_TOKEN_KEY_TYPE},
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{"float", CPP_TOKEN_KEY_TYPE},
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{"double", CPP_TOKEN_KEY_TYPE},
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{"long", CPP_TOKEN_KEY_MODIFIER},
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{"short", CPP_TOKEN_KEY_MODIFIER},
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{"unsigned", CPP_TOKEN_KEY_MODIFIER},
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{"const", CPP_TOKEN_KEY_QUALIFIER},
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{"volatile", CPP_TOKEN_KEY_QUALIFIER},
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{"asm", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"break", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"case", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"catch", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"continue", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"default", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"do", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"else", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"for", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"goto", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"if", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"return", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"switch", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"try", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"while", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"static_assert", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"const_cast", CPP_TOKEN_KEY_CAST},
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{"dynamic_cast", CPP_TOKEN_KEY_CAST},
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{"reinterpret_cast", CPP_TOKEN_KEY_CAST},
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{"static_cast", CPP_TOKEN_KEY_CAST},
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{"class", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"enum", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"struct", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"typedef", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"union", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"template", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"typename", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"friend", CPP_TOKEN_KEY_ACCESS},
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{"namespace", CPP_TOKEN_KEY_ACCESS},
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{"private", CPP_TOKEN_KEY_ACCESS},
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{"protected", CPP_TOKEN_KEY_ACCESS},
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{"public", CPP_TOKEN_KEY_ACCESS},
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{"using", CPP_TOKEN_KEY_ACCESS},
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{"extern", CPP_TOKEN_KEY_LINKAGE},
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{"export", CPP_TOKEN_KEY_LINKAGE},
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{"inline", CPP_TOKEN_KEY_LINKAGE},
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{"static", CPP_TOKEN_KEY_LINKAGE},
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{"virtual", CPP_TOKEN_KEY_LINKAGE},
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{"alignas", CPP_TOKEN_KEY_OTHER},
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{"explicit", CPP_TOKEN_KEY_OTHER},
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{"noexcept", CPP_TOKEN_KEY_OTHER},
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{"nullptr", CPP_TOKEN_KEY_OTHER},
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{"operator", CPP_TOKEN_KEY_OTHER},
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{"register", CPP_TOKEN_KEY_OTHER},
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{"this", CPP_TOKEN_KEY_OTHER},
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{"thread_local", CPP_TOKEN_KEY_OTHER},
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};
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struct FSM_State{
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unsigned int transition_rule[256];
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unsigned char override;
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};
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struct FSM{
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FSM_State *states;
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unsigned short count, max;
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FSM_State *term_states;
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unsigned short term_count, term_max;
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unsigned char terminal_base;
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char *comment;
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};
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struct FSM_Stack{
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FSM *fsms;
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int count, max;
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unsigned char table_transition_state;
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unsigned char final_state;
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};
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struct Match_Node{
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Match_Node *first_child;
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Match_Node *next_sibling;
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int *words;
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int count, max;
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int index;
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FSM_State *state;
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};
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struct Match_Tree{
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Match_Node *nodes;
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int count, max;
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};
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struct Match_Tree_Stack{
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Match_Tree *trees;
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int count, max;
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};
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struct Future_FSM{
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Match_Node *source;
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};
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struct Future_FSM_Stack{
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Future_FSM *futures;
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int count, max;
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};
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FSM*
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get_fsm(FSM_Stack *stack){
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FSM* result = 0;
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assert(stack->count < stack->max);
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result = &stack->fsms[stack->count];
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++stack->count;
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return(result);
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}
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Match_Tree*
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get_tree(Match_Tree_Stack *stack){
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Match_Tree* result = 0;
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assert(stack->count < stack->max);
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result = &stack->trees[stack->count++];
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return(result);
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}
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FSM
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fsm_init(unsigned short max, unsigned char terminal_base){
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FSM fsm;
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int memsize;
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fsm.max = max;
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fsm.count = 0;
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memsize = sizeof(FSM_State)*fsm.max;
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fsm.states = (FSM_State*)malloc(memsize);
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fsm.term_max = max;
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fsm.term_count = 0;
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memsize = sizeof(FSM_State)*fsm.term_max;
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fsm.term_states = (FSM_State*)malloc(memsize);
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fsm.comment = 0;
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fsm.terminal_base = terminal_base;
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return(fsm);
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}
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void
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fsm_add_comment(FSM *fsm, char *str){
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int comment_len;
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int str_len;
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char *new_comment;
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str_len = (int)strlen(str);
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if (fsm->comment != 0){
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comment_len = (int)strlen(fsm->comment);
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new_comment = (char*)malloc(str_len + comment_len + 1);
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memcpy(new_comment, fsm->comment, comment_len);
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memcpy(new_comment + comment_len, str, str_len);
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new_comment[comment_len + str_len] = 0;
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free(fsm->comment);
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fsm->comment = new_comment;
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}
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else{
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fsm->comment = (char*)malloc(str_len + 1);
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memcpy(fsm->comment, str, str_len);
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fsm->comment[str_len] = 0;
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}
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}
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Match_Tree
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tree_init(unsigned short max){
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Match_Tree tree;
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int memsize;
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tree.max = max;
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tree.count = 0;
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memsize = sizeof(Match_Node)*tree.max;
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tree.nodes = (Match_Node*)malloc(memsize);
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return(tree);
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}
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unsigned char
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push_future_fsm(Future_FSM_Stack *stack, Match_Node *node){
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unsigned char index = 0;
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Future_FSM *future = 0;
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assert(stack->count < stack->max);
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assert(stack->max < 256);
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index = (unsigned char)(stack->count++);
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future = &stack->futures[index];
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future->source = node;
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return(index);
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}
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Match_Node*
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match_get_node(Match_Tree *tree){
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Match_Node *result;
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assert(tree->count < tree->max);
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result = &tree->nodes[tree->count++];
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return(result);
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}
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void
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match_init_node(Match_Node *node, int match_count){
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*node = {};
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node->words = (int*)malloc(sizeof(int)*match_count);
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node->max = match_count;
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}
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void
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match_copy_init_node(Match_Node *node, Match_Node *source){
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*node = {};
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node->max = source->count;
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node->count = source->count;
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node->words = (int*)malloc(sizeof(int)*source->count);
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node->index = source->index;
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memcpy(node->words, source->words, sizeof(int)*source->count);
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}
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void
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match_add_word(Match_Node *node, int word){
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assert(node->count < node->max);
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node->words[node->count++] = word;
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}
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FSM_State*
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fsm_get_state(FSM *fsm, unsigned int terminal_base){
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FSM_State *result;
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unsigned short i;
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assert(fsm->count < fsm->max);
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result = &fsm->states[fsm->count++];
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for (i = 0; i < 256; ++i){
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result->transition_rule[i] = terminal_base;
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}
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result->override = 0;
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return(result);
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}
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FSM_State*
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fsm_get_state(FSM *fsm){
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FSM_State *result = fsm_get_state(fsm, fsm->terminal_base);
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return(result);
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}
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FSM_State*
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fsm_get_term_state(FSM *fsm, unsigned char override){
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FSM_State *result;
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assert(fsm->term_count < fsm->term_max);
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result = &fsm->term_states[fsm->term_count++];
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result->override = override;
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return(result);
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}
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unsigned char
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fsm_index(FSM *fsm, FSM_State *s){
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unsigned char result;
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result = (unsigned char)(unsigned long long)(s - fsm->states);
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if (s->override){
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result = fsm->terminal_base + s->override;
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}
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return(result);
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}
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void
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fsm_add_transition(FSM_State *state, char c, unsigned char dest){
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state->transition_rule[c] = dest;
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}
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struct Terminal_Lookup_Table{
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unsigned int state_to_type[60];
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unsigned char type_to_state[CPP_TOKEN_TYPE_COUNT];
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unsigned char state_count;
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};
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void
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process_match_node(String_And_Flag *input, Match_Node *node, Match_Tree *tree, FSM *fsm){
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int next_index = node->index + 1;
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int match_count = node->count;
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FSM_State *this_state = node->state;
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unsigned char terminal_base = fsm->terminal_base;
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int i, j, *words = node->words;
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String_And_Flag saf;
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int l;
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char c;
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Match_Node *next_nodes[256];
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Match_Node *newest_child = 0;
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Match_Node *n;
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unsigned char unjunkify = 0;
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memset(next_nodes, 0, sizeof(next_nodes));
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for (i = 0; i < match_count; ++i){
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j = words[i];
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saf = input[j];
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l = (int)strlen(saf.str);
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if (next_index < l){
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c = saf.str[next_index];
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if (next_nodes[c] == 0){
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next_nodes[c] = match_get_node(tree);
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match_init_node(next_nodes[c], match_count);
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next_nodes[c]->index = next_index;
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next_nodes[c]->state = fsm_get_state(fsm);
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if (newest_child == 0){
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assert(node->first_child == 0);
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node->first_child = next_nodes[c];
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}
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else{
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assert(newest_child->next_sibling == 0);
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newest_child->next_sibling = next_nodes[c];
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}
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newest_child = next_nodes[c];
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}
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match_add_word(next_nodes[c], j);
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fsm_add_transition(this_state, c, fsm_index(fsm, next_nodes[c]->state));
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}
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else if (next_index == l){
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assert(unjunkify == 0);
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unjunkify = (unsigned char)saf.flags;
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}
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}
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if (unjunkify){
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for (i = 0; i < 256; ++i){
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if (this_state->transition_rule[i] == terminal_base){
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this_state->transition_rule[i] = terminal_base + unjunkify;
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}
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}
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}
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for (n = node->first_child; n; n = n->next_sibling){
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process_match_node(input, n, tree, fsm);
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}
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}
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FSM
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generate_pp_directive_fsm(){
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Match_Tree tree;
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FSM fsm;
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Match_Node *root_node;
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FSM_State *root_state;
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int i;
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fsm = fsm_init(200, 200);
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tree = tree_init(200);
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root_state = fsm_get_state(&fsm);
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root_node = match_get_node(&tree);
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match_init_node(root_node, ArrayCount(preprop_strings));
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for (i = 0; i < ArrayCount(preprop_strings); ++i){
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root_node->words[i] = i;
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}
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root_node->count = ArrayCount(preprop_strings);
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root_node->state = root_state;
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root_node->index = -1;
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process_match_node(preprop_strings, root_node, &tree, &fsm);
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root_state->transition_rule[' '] = 0;
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root_state->transition_rule['\t'] = 0;
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root_state->transition_rule['\r'] = 0;
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root_state->transition_rule['\v'] = 0;
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root_state->transition_rule['\f'] = 0;
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return(fsm);
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}
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|
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/*
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|
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Each state needs a full set of transition rules. Most transitions should go into a
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"not-a-keyword-state". The exceptions are:
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1. When we see an alphanumeric character that is the next character of an actual keyword
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i. May need to transition to a new table at this point.
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2. When we have just seen an entire valid keyword, and the next thing we see is not alphanumeric.
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*/
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|
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#define RealTerminateBase 65536
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|
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int
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char_is_alphanumeric(char x){
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int result = 0;
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if ((x >= '0' && x <= '9') ||
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(x >= 'A' && x <= 'Z') ||
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(x >= 'a' && x <= 'z') ||
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x == '_'){
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result = 1;
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}
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return(result);
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}
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|
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void
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process_match_node(String_And_Flag *input, Match_Node *node, Match_Tree *tree, FSM *fsm,
|
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Terminal_Lookup_Table *terminal_table, int levels_to_go,
|
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Future_FSM_Stack *unfinished_fsms){
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|
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int next_index = node->index + 1;
|
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int match_count = node->count;
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int *words = node->words;
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FSM_State *this_state = node->state;
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|
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int word_index = 0;
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int good_transition = 0;
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int len = 0;
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int i = 0;
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|
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String_And_Flag saf = {0};
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|
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Match_Node *next_nodes[256];
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Match_Node *newest_child = 0;
|
|
Match_Node *n = 0;
|
|
char c = 0;
|
|
|
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unsigned char override = 0;
|
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|
|
memset(next_nodes, 0, sizeof(next_nodes));
|
|
|
|
for (i = 0; i < match_count; ++i){
|
|
word_index = words[i];
|
|
saf = input[word_index];
|
|
|
|
len = (int)strlen(saf.str);
|
|
if (next_index < len){
|
|
c = saf.str[next_index];
|
|
|
|
if (next_nodes[c] == 0){
|
|
next_nodes[c] = match_get_node(tree);
|
|
match_init_node(next_nodes[c], match_count);
|
|
|
|
next_nodes[c]->index = next_index;
|
|
|
|
if (levels_to_go == 1){
|
|
override = push_future_fsm(unfinished_fsms, next_nodes[c]);
|
|
next_nodes[c]->state = fsm_get_term_state(fsm, override);
|
|
}
|
|
else{
|
|
next_nodes[c]->state = fsm_get_state(fsm, RealTerminateBase);
|
|
}
|
|
|
|
if (newest_child == 0){
|
|
assert(node->first_child == 0);
|
|
node->first_child = next_nodes[c];
|
|
}
|
|
else{
|
|
assert(newest_child->next_sibling == 0);
|
|
newest_child->next_sibling = next_nodes[c];
|
|
}
|
|
newest_child = next_nodes[c];
|
|
}
|
|
|
|
match_add_word(next_nodes[c], word_index);
|
|
fsm_add_transition(this_state, c, fsm_index(fsm, next_nodes[c]->state));
|
|
}
|
|
else{
|
|
assert(next_index == len);
|
|
assert(good_transition == 0);
|
|
good_transition = terminal_table->type_to_state[saf.flags] + RealTerminateBase;
|
|
}
|
|
}
|
|
|
|
if (good_transition){
|
|
for (i = 0; i < 256; ++i){
|
|
if (!char_is_alphanumeric((char)i)){
|
|
this_state->transition_rule[i] = good_transition;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (levels_to_go != 1){
|
|
for (n = node->first_child; n; n = n->next_sibling){
|
|
process_match_node(input, n, tree, fsm, terminal_table, levels_to_go-1, unfinished_fsms);
|
|
}
|
|
}
|
|
}
|
|
|
|
Whitespace_FSM
|
|
whitespace_skip_fsm(Whitespace_FSM wfsm, char c){
|
|
if (wfsm.pp_state != LSPP_default){
|
|
if (c == '\n') wfsm.pp_state = LSPP_default;
|
|
}
|
|
if (!(c == ' ' || c == '\n' || c == '\t' || c == '\r' || c == '\f' || c == '\v')){
|
|
wfsm.white_done = 1;
|
|
}
|
|
return(wfsm);
|
|
}
|
|
|
|
Lex_FSM
|
|
int_fsm(Lex_FSM fsm, char c){
|
|
switch (fsm.int_state){
|
|
case LSINT_default:
|
|
switch (c){
|
|
case 'u': case 'U': fsm.int_state = LSINT_u; break;
|
|
case 'l': fsm.int_state = LSINT_l; break;
|
|
case 'L': fsm.int_state = LSINT_L; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LSINT_u:
|
|
switch (c){
|
|
case 'l': fsm.int_state = LSINT_ul; break;
|
|
case 'L': fsm.int_state = LSINT_uL; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LSINT_l:
|
|
switch (c){
|
|
case 'l': fsm.int_state = LSINT_ll; break;
|
|
case 'U': case 'u': fsm.int_state = LSINT_extra; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LSINT_L:
|
|
switch (c){
|
|
case 'L': fsm.int_state = LSINT_ll; break;
|
|
case 'U': case 'u': fsm.int_state = LSINT_extra; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LSINT_ul:
|
|
switch (c){
|
|
case 'l': fsm.int_state = LSINT_extra; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LSINT_uL:
|
|
switch (c){
|
|
case 'L': fsm.int_state = LSINT_extra; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LSINT_ll:
|
|
switch (c){
|
|
case 'u': case 'U': fsm.int_state = LSINT_extra; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LSINT_extra:
|
|
fsm.emit_token = 1;
|
|
break;
|
|
}
|
|
return(fsm);
|
|
}
|
|
|
|
Lex_FSM
|
|
main_fsm(Lex_FSM fsm, unsigned char pp_state, unsigned char c){
|
|
if (c == 0) fsm.emit_token = 1;
|
|
else
|
|
switch (pp_state){
|
|
case LSPP_error:
|
|
fsm.state = LS_error_message;
|
|
if (c == '\n') fsm.emit_token = 1;
|
|
break;
|
|
|
|
case LSPP_include:
|
|
switch (fsm.state){
|
|
case LSINC_default:
|
|
switch (c){
|
|
case '"': fsm.state = LSINC_quotes; break;
|
|
case '<': fsm.state = LSINC_pointy; break;
|
|
default: fsm.state = LSINC_junk; break;
|
|
}
|
|
break;
|
|
|
|
case LSINC_quotes:
|
|
if (c == '"') fsm.emit_token = 1;
|
|
else if (c == '\n'){
|
|
fsm.emit_token = 1;
|
|
fsm.state = LSINC_junk;
|
|
}
|
|
break;
|
|
|
|
case LSINC_pointy:
|
|
if (c == '>') fsm.emit_token = 1;
|
|
else if (c == '\n'){
|
|
fsm.emit_token = 1;
|
|
fsm.state = LSINC_junk;
|
|
}
|
|
break;
|
|
|
|
case LSINC_junk:
|
|
if (c == '\n') fsm.emit_token = 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
switch (fsm.state){
|
|
case LS_default:
|
|
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_'){
|
|
fsm.state = LS_identifier;
|
|
}
|
|
else if (c >= '1' && c <= '9'){
|
|
fsm.state = LS_number;
|
|
}
|
|
else if (c == '0'){
|
|
fsm.state = LS_number0;
|
|
}
|
|
else switch (c){
|
|
case '\'': fsm.state = LS_char; break;
|
|
case '"': fsm.state = LS_string; break;
|
|
|
|
case '/': fsm.state = LS_comment_pre; break;
|
|
|
|
case '.': fsm.state = LS_dot; break;
|
|
|
|
case '<': fsm.state = LS_less; break;
|
|
case '>': fsm.state = LS_more; break;
|
|
|
|
case '-': fsm.state = LS_minus; break;
|
|
|
|
case '&': fsm.state = LS_and; break;
|
|
case '|': fsm.state = LS_or; break;
|
|
|
|
case '+': fsm.state = LS_plus; break;
|
|
|
|
case ':': fsm.state = LS_colon; break;
|
|
|
|
case '*': fsm.state = LS_star; break;
|
|
|
|
case '%': fsm.state = LS_modulo; break;
|
|
case '^': fsm.state = LS_caret; break;
|
|
|
|
case '=': fsm.state = LS_eq; break;
|
|
case '!': fsm.state = LS_bang; break;
|
|
|
|
case '#':
|
|
if (pp_state == LSPP_default){
|
|
fsm.state = LS_pp;
|
|
fsm.emit_token = 1;
|
|
}
|
|
else{
|
|
fsm.state = LS_pound;
|
|
}
|
|
break;
|
|
|
|
#define OperCase(op,type) case op: fsm.emit_token = 1; break;
|
|
OperCase('{', CPP_TOKEN_BRACE_OPEN);
|
|
OperCase('}', CPP_TOKEN_BRACE_CLOSE);
|
|
|
|
OperCase('[', CPP_TOKEN_BRACKET_OPEN);
|
|
OperCase(']', CPP_TOKEN_BRACKET_CLOSE);
|
|
|
|
OperCase('(', CPP_TOKEN_PARENTHESE_OPEN);
|
|
OperCase(')', CPP_TOKEN_PARENTHESE_CLOSE);
|
|
|
|
OperCase('~', CPP_TOKEN_TILDE);
|
|
OperCase(',', CPP_TOKEN_COMMA);
|
|
OperCase(';', CPP_TOKEN_SEMICOLON);
|
|
OperCase('?', CPP_TOKEN_TERNARY_QMARK);
|
|
|
|
OperCase('@', CPP_TOKEN_JUNK);
|
|
OperCase('$', CPP_TOKEN_JUNK);
|
|
OperCase('\\', CPP_TOKEN_JUNK);
|
|
#undef OperCase
|
|
}
|
|
break;
|
|
|
|
case LS_identifier:
|
|
if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_')){
|
|
fsm.emit_token = 1;
|
|
}
|
|
break;
|
|
|
|
case LS_pound:
|
|
switch (c){
|
|
case '#': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_pp:break;
|
|
|
|
case LS_char:
|
|
case LS_char_multiline:
|
|
switch(c){
|
|
case '\n': case '\'': fsm.emit_token = 1; break;
|
|
case '\\': fsm.state = LS_char_slashed; break;
|
|
}
|
|
break;
|
|
|
|
case LS_char_slashed:
|
|
switch (c){
|
|
case '\r': case '\f': case '\v': break;
|
|
case '\n': fsm.state = LS_char_multiline; break;
|
|
default: fsm.state = LS_char; break;
|
|
}
|
|
break;
|
|
|
|
case LS_string:
|
|
case LS_string_multiline:
|
|
switch(c){
|
|
case '\n': case '\"': fsm.emit_token = 1; break;
|
|
case '\\': fsm.state = LS_string_slashed; break;
|
|
}
|
|
break;
|
|
|
|
case LS_string_slashed:
|
|
switch (c){
|
|
case '\r': case '\f': case '\v': break;
|
|
case '\n': fsm.state = LS_string_multiline; break;
|
|
default: fsm.state = LS_string; break;
|
|
}
|
|
break;
|
|
|
|
case LS_number:
|
|
if (c >= '0' && c <= '9'){
|
|
fsm.state = LS_number;
|
|
}
|
|
else{
|
|
switch (c){
|
|
case '.': fsm.state = LS_float; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case LS_number0:
|
|
if (c >= '0' && c <= '9'){
|
|
fsm.state = LS_number;
|
|
}
|
|
else if (c == 'x'){
|
|
fsm.state = LS_hex;
|
|
}
|
|
else if (c == '.'){
|
|
fsm.state = LS_float;
|
|
}
|
|
else{
|
|
fsm.emit_token = 1;
|
|
}
|
|
break;
|
|
|
|
case LS_float:
|
|
if (!(c >= '0' && c <= '9')){
|
|
switch (c){
|
|
case 'e': fsm.state = LS_crazy_float0; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case LS_crazy_float0:
|
|
{
|
|
if ((c >= '0' && c <= '9') || c == '-'){
|
|
fsm.state = LS_crazy_float1;
|
|
}
|
|
else{
|
|
fsm.emit_token = 1;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case LS_crazy_float1:
|
|
{
|
|
if (!(c >= '0' && c <= '9')){
|
|
fsm.emit_token = 1;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case LS_hex:
|
|
if (!(c >= '0' && c <= '9' || c >= 'a' && c <= 'f' || c >= 'A' && c <= 'F')){
|
|
fsm.emit_token = 1;
|
|
}
|
|
break;
|
|
|
|
case LS_dot:
|
|
if (c >= '0' && c <= '9'){
|
|
fsm.state = LS_float;
|
|
}
|
|
else
|
|
switch (c){
|
|
case '.': fsm.state = LS_ellipsis; break;
|
|
case '*': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_ellipsis: fsm.emit_token = 1; break;
|
|
|
|
case LS_less:
|
|
switch (c){
|
|
case '<': fsm.state = LS_less_less; break;
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_less_less:
|
|
switch (c){
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_more:
|
|
switch (c){
|
|
case '>': fsm.state = LS_more_more; break;
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_more_more:
|
|
switch (c){
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_comment_pre:
|
|
switch (c){
|
|
case '/': fsm.state = LS_comment; break;
|
|
case '*': fsm.state = LS_comment_block; break;
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_comment:
|
|
switch (c){
|
|
case '\\': fsm.state = LS_comment_slashed; break;
|
|
case '\n': fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_comment_slashed:
|
|
switch (c){
|
|
case '\r': case '\f': case '\v': break;
|
|
default: fsm.state = LS_comment; break;
|
|
}
|
|
break;
|
|
|
|
case LS_comment_block:
|
|
switch (c){
|
|
case '*': fsm.state = LS_comment_block_ending; break;
|
|
}
|
|
break;
|
|
|
|
case LS_comment_block_ending:
|
|
switch (c){
|
|
case '*': fsm.state = LS_comment_block_ending; break;
|
|
case '/': fsm.emit_token = 1; break;
|
|
default: fsm.state = LS_comment_block; break;
|
|
}
|
|
break;
|
|
|
|
case LS_minus:
|
|
switch (c){
|
|
case '>': fsm.state = LS_arrow; break;
|
|
case '-': fsm.emit_token = 1; break;
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_arrow:
|
|
switch (c){
|
|
case '*': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_and:
|
|
switch (c){
|
|
case '&': fsm.emit_token = 1; break;
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_or:
|
|
switch (c){
|
|
case '|': fsm.emit_token = 1; break;
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_plus:
|
|
switch (c){
|
|
case '+': fsm.emit_token = 1; break;
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_colon:
|
|
switch (c){
|
|
case ':': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_star:
|
|
switch (c){
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_modulo:
|
|
switch (c){
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_caret:
|
|
switch (c){
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_eq:
|
|
switch (c){
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
|
|
case LS_bang:
|
|
switch (c){
|
|
case '=': fsm.emit_token = 1; break;
|
|
default: fsm.emit_token = 1; break;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
return(fsm);
|
|
}
|
|
|
|
void
|
|
begin_table(FILE *file, char *type, char *group_name, char *table_name){
|
|
fprintf(file, "unsigned %s %s_%s[] = {\n", type, group_name, table_name);
|
|
}
|
|
|
|
void
|
|
begin_table(FILE *file, char *type, char *table_name){
|
|
fprintf(file, "unsigned %s %s[] = {\n", type, table_name);
|
|
}
|
|
|
|
void
|
|
begin_ptr_table(FILE *file, char *type, char *table_name){
|
|
fprintf(file, "unsigned %s * %s[] = {\n", type, table_name);
|
|
}
|
|
|
|
void
|
|
do_table_item(FILE *file, unsigned short item){
|
|
fprintf(file, "%2d,", (int)item);
|
|
}
|
|
|
|
void
|
|
do_table_item_direct(FILE *file, char *item, char *tail){
|
|
fprintf(file, "%s%s,", item, tail);
|
|
}
|
|
|
|
void
|
|
end_row(FILE *file){
|
|
fprintf(file, "\n");
|
|
}
|
|
|
|
void
|
|
end_table(FILE *file){
|
|
fprintf(file, "};\n\n");
|
|
}
|
|
|
|
struct FSM_Tables{
|
|
unsigned char *full_transition_table;
|
|
unsigned char *marks;
|
|
unsigned char *eq_class;
|
|
unsigned char *eq_class_rep;
|
|
unsigned char *reduced_transition_table;
|
|
|
|
unsigned char eq_class_counter;
|
|
unsigned short state_count;
|
|
};
|
|
|
|
void
|
|
allocate_full_tables(FSM_Tables *table, unsigned char state_count){
|
|
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);
|
|
}
|
|
|
|
void
|
|
do_table_reduction(FSM_Tables *table, unsigned short state_count){
|
|
{
|
|
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);
|
|
{
|
|
unsigned char *r_line = table->reduced_transition_table;
|
|
for (unsigned short eq = 0; eq < table->eq_class_counter; ++eq){
|
|
unsigned char *u_line = table->full_transition_table + state_count * table->eq_class_rep[eq];
|
|
memcpy(r_line, u_line, state_count);
|
|
r_line += state_count;
|
|
}
|
|
}
|
|
}
|
|
|
|
FSM_Tables
|
|
generate_whitespace_skip_table(){
|
|
unsigned char state_count = LSPP_count;
|
|
FSM_Tables table;
|
|
allocate_full_tables(&table, state_count);
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
do_table_reduction(&table, state_count);
|
|
|
|
return(table);
|
|
}
|
|
|
|
FSM_Tables
|
|
generate_int_table(){
|
|
unsigned char state_count = LSINT_count;
|
|
FSM_Tables table;
|
|
allocate_full_tables(&table, state_count);
|
|
|
|
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.int_state = state;
|
|
fsm.emit_token = 0;
|
|
new_fsm = int_fsm(fsm, (unsigned char)c);
|
|
table.full_transition_table[i++] = new_fsm.int_state + state_count*new_fsm.emit_token;
|
|
}
|
|
}
|
|
|
|
do_table_reduction(&table, state_count);
|
|
|
|
return(table);
|
|
}
|
|
|
|
FSM_Tables
|
|
generate_fsm_table(unsigned char pp_state){
|
|
unsigned char state_count = LS_count;
|
|
FSM_Tables table;
|
|
allocate_full_tables(&table, state_count);
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
do_table_reduction(&table, state_count);
|
|
|
|
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);
|
|
}
|
|
|
|
void
|
|
render_variable(FILE *file, char *type, char *variable, unsigned int x){
|
|
fprintf(file, "%s %s = %d;\n\n", type, variable, x);
|
|
}
|
|
|
|
void
|
|
render_comment(FILE *file, char *comment){
|
|
fprintf(file, "/*\n%s*/\n", comment);
|
|
}
|
|
|
|
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"},
|
|
};
|
|
|
|
FSM_Tables
|
|
generate_table_from_abstract_fsm(FSM fsm, unsigned char real_term_base){
|
|
unsigned char state_count = (unsigned char)fsm.count;
|
|
FSM_Tables table;
|
|
|
|
allocate_full_tables(&table, state_count);
|
|
|
|
int i = 0;
|
|
unsigned int new_state;
|
|
for (unsigned short c = 0; c < 256; ++c){
|
|
for (unsigned char state = 0; state < state_count; ++state){
|
|
new_state = fsm.states[state].transition_rule[c];
|
|
if (new_state >= RealTerminateBase){
|
|
new_state = new_state - RealTerminateBase + real_term_base;
|
|
}
|
|
table.full_transition_table[i++] = (unsigned char)new_state;
|
|
}
|
|
}
|
|
|
|
do_table_reduction(&table, state_count);
|
|
|
|
return(table);
|
|
}
|
|
|
|
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");
|
|
|
|
FSM_Tables itables = generate_int_table();
|
|
render_fsm_table(file, itables, "int_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);
|
|
|
|
FSM pp_directive_fsm = generate_pp_directive_fsm();
|
|
FSM_Tables pp_directive_tables = generate_table_from_abstract_fsm(pp_directive_fsm, 0);
|
|
|
|
render_fsm_table(file, pp_directive_tables, "pp_directive");
|
|
render_variable(file, "unsigned char", "LSDIR_default", 0);
|
|
render_variable(file, "unsigned char", "LSDIR_count", pp_directive_fsm.count);
|
|
render_variable(file, "unsigned char", "pp_directive_terminal_base", pp_directive_fsm.terminal_base);
|
|
|
|
fclose(file);
|
|
return(0);
|
|
}
|
|
|
|
// BOTTOM
|
|
|
|
|