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Started implementing the lexer

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Abdelrahman Said
2023-06-17 00:45:00 +01:00
parent f4b826a299
commit cad6b938b3
9 changed files with 887 additions and 0 deletions
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1
.gitignore vendored
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@@ -1,2 +1,3 @@
.cache
*.dSYM
src/ignore/**/*

3
build Normal file
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@@ -0,0 +1,3 @@
#!/bin/bash
bear -- ./compile

12
compile Normal file
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@@ -0,0 +1,12 @@
#!/bin/bash
CC=clang
CFLAGS="-g -Wall -Werror -pedantic -Iinclude"
SRC="src/main.c"
OUT=main
# LEXER
CFLAGS+=" -Iinclude/lexer"
SRC+=" src/lexer/*.c"
$CC $CFLAGS $SRC -o $OUT

682
compile_commands.json Normal file
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@@ -0,0 +1,682 @@
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26
include/aliases.h Normal file
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@@ -0,0 +1,26 @@
#ifndef ALIASES_H
#define ALIASES_H
#include <stdint.h>
#define u8 uint8_t
#define u16 uint16_t
#define u32 uint32_t
#define u64 uint64_t
#define i8 int8_t
#define i16 int16_t
#define i32 int32_t
#define i64 int64_t
#define f32 float
#define f64 double
#define INTERNAL static
#define PERSISTENT static
#ifdef __cplusplus
#define CLASS_MEMBER static
#endif // __cplusplus
#endif // !ALIASES_H

6
include/lexer/lexer_states.h Normal file
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@@ -0,0 +1,6 @@
#ifndef LEXER_STATES_H
#define LEXER_STATES_H
typedef struct lexer lexer_t;
#endif // !LEXER_STATES_H

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main Normal file
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src/lexer/lexer_states.c Normal file
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#include "lexer_states.h"
#include "aliases.h"
#include <ctype.h>
// clang-format off
typedef enum {
// GENERAL STATES
LEXER_STATE_START,
LEXER_STATE_SUCCESS,
LEXER_STATE_ERROR,
LEXER_STATE_VALUE,
LEXER_STATE_KEYWORD,
// COLLECTION STATES
LEXER_STATE_OBJECT,
LEXER_STATE_ARRAY,
// OBJECT STATES
LEXER_STATE_KEY_START,
LEXER_STATE_KEY_END,
// NUMBER STATES
LEXER_STATE_NUMBER_START,
LEXER_STATE_DECIMAL,
LEXER_STATE_NUMBER,
LEXER_STATE_FRACTION,
LEXER_STATE_EXPONENT,
LEXER_STATE_EXP_SIGN,
LEXER_STATE_POWER,
LEXER_STATE_NUMBER_END,
// STRING STATES
LEXER_STATE_STRING,
LEXER_STATE_ESCAPE_SEQUENCE,
LEXER_STATE_UNICODE_HEX,
COUNT_LEXER_STATES,
} lexer_state_t;
// clang-format on
struct lexer {
lexer_state_t current;
u64 line;
u64 column;
};
void lexer_state_machine(lexer_t *lexer, char input);
lexer_state_t handle_lexer_start(char input);
lexer_state_t handle_object(char input);
lexer_state_t handle_character(char input);
lexer_state_t handle_escape_sequence(char input);
void lexer_state_machine(lexer_t *lexer, char input) {
switch (lexer->current) {
case LEXER_STATE_START:
lexer->current = handle_lexer_start(input);
break;
case LEXER_STATE_SUCCESS:
break;
case LEXER_STATE_ERROR:
break;
case LEXER_STATE_VALUE:
break;
case LEXER_STATE_KEYWORD:
break;
case LEXER_STATE_OBJECT:
lexer->current = handle_object(input);
break;
case LEXER_STATE_ARRAY:
lexer->current = LEXER_STATE_VALUE;
break;
case LEXER_STATE_KEY_START:
lexer->current = LEXER_STATE_STRING;
break;
case LEXER_STATE_KEY_END:
break;
case LEXER_STATE_NUMBER_START:
break;
case LEXER_STATE_DECIMAL:
break;
case LEXER_STATE_NUMBER:
break;
case LEXER_STATE_FRACTION:
break;
case LEXER_STATE_EXPONENT:
break;
case LEXER_STATE_EXP_SIGN:
break;
case LEXER_STATE_POWER:
break;
case LEXER_STATE_NUMBER_END:
break;
case LEXER_STATE_STRING:
lexer->current = handle_character(input);
break;
case LEXER_STATE_ESCAPE_SEQUENCE:
lexer->current = handle_escape_sequence(input);
break;
case LEXER_STATE_UNICODE_HEX:
break;
default:
lexer->current = LEXER_STATE_ERROR;
}
}
lexer_state_t handle_lexer_start(char input) {
if (isspace(input)) {
return LEXER_STATE_START;
}
switch (input) {
case '{':
return LEXER_STATE_OBJECT;
case '[':
return LEXER_STATE_ARRAY;
}
return LEXER_STATE_ERROR;
}
lexer_state_t handle_object(char input) {
if (isspace(input)) {
return LEXER_STATE_OBJECT;
} else if (input == '"') {
return LEXER_STATE_KEY_START;
}
return LEXER_STATE_ERROR;
}
lexer_state_t handle_character(char input) {
switch (input) {
case '\\':
return LEXER_STATE_ESCAPE_SEQUENCE;
case '"':
return LEXER_STATE_STRING; // WHAT TO RETURN HERE?
}
return LEXER_STATE_STRING;
}
lexer_state_t handle_escape_sequence(char input) {
switch (input) {
case '"':
case '/':
case '\\':
case 'b':
case 'f':
case 'n':
case 'r':
case 't':
return LEXER_STATE_STRING;
case 'u':
return LEXER_STATE_UNICODE_HEX;
}
return LEXER_STATE_ERROR;
}

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src/main.c Normal file
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#include <stdlib.h>
int main(int argc, char *argv[]) { return EXIT_SUCCESS; }