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statemachine basic architecture

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This commit is contained in:
Richard Thier 2024-09-19 11:36:04 +02:00
parent 356a866e8d
commit 00e818e43b
1 changed files with 79 additions and 19 deletions
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98
engine/slc.h
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@ -1,6 +1,10 @@
#ifndef SLC_H
#define SLC_H
#include<stdint.h> // uint8_t, uint32_t..
#include<string.h> // memcpy, strlen..
#include<stddef.h> // NULL
/** Possible word types */
enum SLC_WORDTYP {
/** Still in plain text */
@ -211,27 +215,36 @@ enum slc_state : uint32_t {
SLC_DEF_NAME,
/** Variable-listing part of word-definition - endline, '(', '[' or '{' ends it */
SLC_DEF_VAR,
/** Raw body part of the word definition - these can contain local variable accesses + words (state-stack in code_stack) */
/** Raw body part of the word definition - these can contain local variable accesses + words, depth counted by vars */
SLC_DEF_BODY,
/** ( .. ) part of the word definition - these can contain local variable accesses + words (state-stack in code_stack) */
SLC_DEF_PAR,
/** [ .. ] part of the word definition - these can contain local variable accesses + words (state-stack in code_stack) */
SLC_DEF_SQBR,
/** { .. } part of the word definition - these can contain local variable accesses + words (state-stack in code_stack) */
SLC_DEF_BR,
/** Name part of a word "call" (non-definition). */
/** Name part of a word "call" (non-definition). Ends by whitespace, '@' (in case of variable) or various parentheses */
SLC_WORD_NAME,
/** Variable part of a word "call" */
/** Variable call (MYWORD@MYVAR) - we get to be here from SLC_WORD_NAME or from START */
SLC_WORD_VAR,
/** ( .. ) part of a word "call" */
SLC_WORD_PAR,
/** [ .. ] part of a word "call" */
SLC_WORD_SQBR,
/** { .. } part of a word "call" */
SLC_WORD_BR,
};
typedef enum slc_state slc_state;
static inline slc_state slc_comment_statechange_in(
slc_state current_state,
char c,
const char *singleline_comment,
const char *multiline_comment_opener,
int singleline_comment_len,
int multiline_comment_len,
int *comment_i,
int *multiline_i){
// FIXME: Implement
return current_state;
}
static inline slc_state slc_defname_statechange(
slc_state current_state,
char c,
const char *prefix) {
// FIXME: Implement
return current_state;
}
/**
* This function runs the main slc engine over a snippet of code.
*
@ -265,9 +278,9 @@ typedef enum slc_state slc_state;
* @param data_stack The data stack (forth-like stack) to use.
* @param insert_stack Used for temporarily expanding the input stream (one word level above current) with further words.
* @param io_connector The engine uses this to open/close pipes/files and write/read them.
* @param singleline_comment OPTIONAL: Like "//" - the character string that makes the rest of the line being comment.
* @param multiline_comment_opener OPTIONAL: The character string that starts a multiline comment. Like / and * for C.
* @param multiline_comment_closer OPTIONAL: The character string that ends a multiline comment. Like * and / for C.
* @param singleline_comment Like "//" - the character string that makes the rest of the line being comment. Can be "" (no NULL).
* @param multiline_comment_opener The character string that starts a multiline comment. Like / and * for C. Can be "" (no NULL).
* @param multiline_comment_closer The character string that ends a multiline comment. Like * and / for C. Can be "" (no NULL).
* @param prefix The prefix added to the lookup of built-ins. Useful when you write a compiler with SLC. Defaults to "" (empty).
* @param ender The character string that ends a word definition. Defaults to ";".
* @param varprefix The character string that prefixes variable declarations. Defaults to "@".
@ -287,7 +300,54 @@ static inline void slc(
const char *prefix,
const char *ender,
const char *varprefix) {
slc_state main_state = SLC_START;
slc_state state = SLC_START;
int singleline_comment_len = strlen(singleline_comment);
int multiline_comment_opener_len = strlen(multiline_comment_opener);
uint8_t c = 0;
while(((c = code_src()) != 0)) {
switch(state) {
case SLC_START:
int comment_i = 0;
int multiline_i = 0;
int def_name_i = 0;
/* state -> comment | multiline_comment */
state = slc_comment_statechange_in(
state,
c,
singleline_comment,
multiline_comment_opener,
singleline_comment_len,
multiline_comment_opener_len,
&comment_i,
&multiline_i);
/* state -> def_name */
if(state == SLC_START) {
state = slc_defname_statechange(
state,
c,
prefix);
}
if(state == SLC_START) {
}
break;
case SLC_COMMENT:
break;
case SLC_MULTILINE_COMMENT:
break;
case SLC_DEF_NAME:
break;
case SLC_DEF_VAR:
break;
case SLC_DEF_BODY:
break;
case SLC_WORD_NAME:
break;
case SLC_WORD_VAR:
break;
}
}
}
#endif /* SLC_H */