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.gitignore vendored Normal file
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build
noom

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LICENSE Normal file
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GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.
0. Additional Definitions.
As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.
"The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.
An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.
A "Combined Work" is a work produced by combining or linking an
Application with the Library. The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".
The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code
for portions of the Combined Work that, considered in isolation, are
based on the Application, and not on the Linked Version.
The "Corresponding Application Code" for a Combined Work means the
object code and/or source code for the Application, including any data
and utility programs needed for reproducing the Combined Work from the
Application, but excluding the System Libraries of the Combined Work.
1. Exception to Section 3 of the GNU GPL.
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whatever part of its purpose remains meaningful, or
b) under the GNU GPL, with none of the additional permissions of
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3. Object Code Incorporating Material from Library Header Files.
The object code form of an Application may incorporate material from
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6. Revised Versions of the GNU Lesser General Public License.
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README.md Normal file
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# noom
> Lua is moon in Portuguese and noom is moon in reverse.
A reimplementation of Lua, or well, it will be, it doesn't do much yet.

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-- i love build scripts i love build scripts i love build scripts scripts build love i script build love me i love script build i script love build
-- TODO: script the build
local function filename(path)
local s,e = 1, #path
for i = 1,#path do
if path:sub(i,i) == '/' then s = i+1 end;
if path:sub(i,i) == '.' then e = i-1 end;
end
return path:sub(s,e)
end
local function runCommand(cmd)
print("> " .. cmd)
return os.execute(cmd)
end
runCommand('rm -r build')
runCommand('mkdir build')
local files = {
'src/lexer.c',
'src/helper.c',
'src/main.c',
}
local objects = {}
for i = 1,#files do
local fname = files[i]
local out = "build/" .. filename(fname) .. '.o'
runCommand('clang -c -o ' .. out .. ' ' .. fname)
objects[#objects+1] = out;
end
runCommand('clang -o noom ' .. table.concat(objects, ' '))

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#include "helper.h"
#include "types.h"
int noom_startswith(const char* str, char* compare) {
noom_uint_t i = 0;
while (1) {
if (compare[i] == '\0') return 1; // we did it
if (str[i] != compare[i]) return 0;
i++;
}
return 0; // unreachable but whatevs
}
int noom_streql(const char* stra, noom_uint_t lena, const char* strb, noom_uint_t lenb) {
if (lena != lenb) return 0;
for (noom_uint_t i = 0; i < lena; i++) {
if (stra[i] != strb[i]) return 0;
}
return 1;
}

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#include "types.h"
int noom_startswith(const char* str, char* compare);
int noom_streql(const char* stra, noom_uint_t lena, const char* strb, noom_uint_t lenb); // rename to something better?

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#include "types.h"
#include "helper.h"
#include "lexer.h"
int noomL_isalpha(char c) {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}
int noomL_isnumber(char c) {
return (c >= '0' && c <= '9');
}
int noomL_isalphanum(char c) {
return noomL_isalpha(c) || noomL_isnumber(c);
}
int noomL_iswhitespace(char c) {
return c == ' ' || c == '\r' || c == '\n' || c == '\t';
}
noom_uint_t noomL_getsymbol(const char* s) { // TODO: maybe find some less shit crap holy crap
if (noom_startswith(s, "...")) return 3;
if (noom_startswith(s, "==")) return 2;
if (noom_startswith(s, "~=")) return 2;
if (noom_startswith(s, "<=")) return 2;
if (noom_startswith(s, ">=")) return 2;
if (noom_startswith(s, "..")) return 2;
if (noom_startswith(s, "+")) return 1;
if (noom_startswith(s, "-")) return 1;
if (noom_startswith(s, "*")) return 1;
if (noom_startswith(s, "/")) return 1;
if (noom_startswith(s, "%")) return 1;
if (noom_startswith(s, "^")) return 1;
if (noom_startswith(s, "#")) return 1;
if (noom_startswith(s, "<")) return 1;
if (noom_startswith(s, ">")) return 1;
if (noom_startswith(s, "=")) return 1;
if (noom_startswith(s, ",")) return 1;
if (noom_startswith(s, "(")) return 1;
if (noom_startswith(s, ")")) return 1;
if (noom_startswith(s, "{")) return 1;
if (noom_startswith(s, "}")) return 1;
if (noom_startswith(s, "[")) return 1;
if (noom_startswith(s, "]")) return 1;
if (noom_startswith(s, ":")) return 1;
if (noom_startswith(s, ".")) return 1;
if (noom_startswith(s, ";")) return 1;
return 0; // no symbol
}
noom_uint_t noomL_getnumber(const char* s) { // TODO: more number kinds idk
// lazy af rn
noom_uint_t len = 0;
while (noomL_isnumber(s[len])) len++;
return len;
}
int noomL_iskeyword(const char* s, noom_uint_t len) {
if (noom_streql(s, len, "true", 4)) return 1;
if (noom_streql(s, len, "false", 5)) return 1;
if (noom_streql(s, len, "nil", 3)) return 1;
if (noom_streql(s, len, "if", 2)) return 1;
if (noom_streql(s, len, "then", 4)) return 1;
if (noom_streql(s, len, "else", 4)) return 1;
if (noom_streql(s, len, "elseif", 6)) return 1;
if (noom_streql(s, len, "and", 3)) return 1;
if (noom_streql(s, len, "or", 2)) return 1;
if (noom_streql(s, len, "not", 3)) return 1;
if (noom_streql(s, len, "local", 5)) return 1;
if (noom_streql(s, len, "for", 3)) return 1;
if (noom_streql(s, len, "function", 8)) return 1;
if (noom_streql(s, len, "do", 2)) return 1;
if (noom_streql(s, len, "until", 5)) return 1;
if (noom_streql(s, len, "goto", 4)) return 1;
if (noom_streql(s, len, "while", 5)) return 1;
if (noom_streql(s, len, "repeat", 6)) return 1;
if (noom_streql(s, len, "end", 3)) return 1;
if (noom_streql(s, len, "in", 2)) return 1;
if (noom_streql(s, len, "return", 6)) return 1;
if (noom_streql(s, len, "break", 5)) return 1;
return 0;
}
noomL_ErrorType noomL_lex(const char* s, noom_uint_t start, noomL_Token* token) {
const char* str = s + start;
if (str[0] == '\0') {
token->type = NOOML_TOKEN_EOF;
token->offset = start;
token->length = 0;
return NOOML_ERROR_NONE;
}
if (noomL_iswhitespace(str[0])) {
token->type = NOOML_TOKEN_WHITESPACE; // TODO: maybe handle multiple at once? for now it should be okay
token->offset = start;
token->length = 1;
return NOOML_ERROR_NONE;
}
if (str[0] == '_' || noomL_isalpha(str[0])) { // TODO: maybe abstract into function for "can start ident"?
noom_uint_t len = 1;
while (str[len] == '_' || noomL_isalphanum(str[len])) // same here
len++;
token->type = NOOML_TOKEN_IDENTIFIER;
if (noomL_iskeyword(str, len)) token->type = NOOML_TOKEN_KEYWORD;
token->offset = start;
token->length = len;
return NOOML_ERROR_NONE;
}
{
noom_uint_t symbolLen = noomL_getsymbol(str);
if (symbolLen) {
token->type = NOOML_TOKEN_SYMBOL;
token->offset = start;
token->length = symbolLen;
return NOOML_ERROR_NONE;
}
}
{
noom_uint_t numberLen = noomL_getnumber(str);
if (numberLen) {
token->type = NOOML_TOKEN_NUMBER;
token->offset = start;
token->length = numberLen;
return NOOML_ERROR_NONE;
}
}
// god damn it we errorrreed
return NOOML_ERROR_UNKNOWN;
}

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#include "types.h"
typedef enum noomL_TokenType {
NOOML_TOKEN_EOF = 0,
NOOML_TOKEN_KEYWORD,
NOOML_TOKEN_WHITESPACE,
NOOML_TOKEN_IDENTIFIER,
NOOML_TOKEN_STRING,
NOOML_TOKEN_SYMBOL,
NOOML_TOKEN_NUMBER,
NOOML_TOKEN_TCOUNT,
} noomL_TokenType;
typedef enum noomL_ErrorType {
NOOML_ERROR_NONE = 0,
NOOML_ERROR_UNKNOWN = 1,
} noomL_ErrorType;
typedef struct noomL_Token {
noomL_TokenType type;
noom_uint_t offset;
noom_uint_t length;
} noomL_Token;
int noomL_isalpha(char c);
int noomL_isnumber(char c);
int noomL_isalphanum(char c);
int noomL_iswhitespace(char c);
noom_uint_t noomL_getsymbol(const char* s);
noom_uint_t noomL_getnumber(const char* s);
noomL_ErrorType noomL_lex(const char* s, noom_uint_t start, noomL_Token* token); // TODO: add more error data

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#include <stdio.h> // for now
#include "lexer.h"
int main(int argc, char** argv) {
// uhh uhhh uhhhhh
const char* code = "local a = 5;";
noom_uint_t pos = 0;
noomL_Token token;
while (1) {
noomL_lex(code, pos, &token);
printf("%d ", token.type);
for (noom_uint_t i = 0; i < token.length; i++) putchar((code + token.offset)[i]);
putchar('\n');
pos += token.length;
if (token.type == NOOML_TOKEN_EOF) break;
}
return 0;
}

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typedef unsigned long int noom_uint_t;