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Add an empty cstdlib.elna source file

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This commit is contained in:
Eugen Wissner
2025-08-10 23:43:09 +03:00
parent 87058adcb3
commit d50356cd9d
11 changed files with 157 additions and 213 deletions
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26
source/CommandLineInterface.elna
View File

@@ -6,9 +6,7 @@ module;
from Args import GetArg, Narg;
from FIO import WriteString, WriteChar, WriteLine, StdErr;
from Strings import CompareStr, Length;
from MemUtils import MemZero;
from Common import ShortString;
import cstdlib, common;
type
CommandLine = record
@@ -29,26 +27,26 @@ begin
NEW(result);
result^.lex := false;
result^.parse := false;
MemZero(@result^.input, 256);
memset(@result^.input, 0, 256);
result^.output[1] := CHAR(0);
while (i < Narg()) & (result <> nil) do
parsed := GetArg(parameter, i);
parsed := false;
if CompareStr(parameter, '--lex') = 0 then
if CompareStr(parameter, "--lex") = 0 then
parsed := true;
result^.lex := true
end;
if CompareStr(parameter, '--parse') = 0 then
if CompareStr(parameter, "--parse") = 0 then
parsed := true;
result^.parse := true
end;
if CompareStr(parameter, '-o') = 0 then
if CompareStr(parameter, "-o") = 0 then
i := i + 1u;
if i = Narg() then
WriteString(StdErr, 'Fatal error: expecting a file name following -o.');
WriteString(StdErr, "Fatal error: expecting a file name following -o.");
result := nil
end;
if i < Narg() then
@@ -57,15 +55,15 @@ begin
end;
parsed := true
end;
if (parameter[1] <> '-') & (parsed = false) then
if (parameter[1] <> "-") & (parsed = false) then
parsed := true;
if Length(result^.input) > 0 then
WriteString(StdErr, 'Fatal error: only one source file can be compiled at once. First given "');
WriteString(StdErr, "Fatal error: only one source file can be compiled at once. First given \"");
WriteString(StdErr, result^.input);
WriteString(StdErr, '", then "');
WriteString(StdErr, "\", then \"");
WriteString(StdErr, parameter);
WriteString(StdErr, '".');
WriteString(StdErr, "\".");
WriteLine(StdErr);
result := nil
end;
@@ -74,7 +72,7 @@ begin
end
end;
if parsed = false then
WriteString(StdErr, 'Fatal error: unknown command line options: ');
WriteString(StdErr, "Fatal error: unknown command line options: ");
WriteString(StdErr, parameter);
WriteChar(StdErr, '.');
@@ -86,7 +84,7 @@ begin
i := i + 1
end;
if (result <> nil) & (Length(result^.input) = 0) then
WriteString(StdErr, 'Fatal error: no input files.');
WriteString(StdErr, "Fatal error: no input files.");
WriteLine(StdErr);
result := nil
end;

74
source/Compiler.elna
View File

@@ -1,74 +0,0 @@
(* This Source Code Form is subject to the terms of the Mozilla Public License,
v. 2.0. If a copy of the MPL was not distributed with this file, You can
obtain one at https://mozilla.org/MPL/2.0/. *)
program;
from FIO import Close, IsNoError, File, OpenToRead, OpenToWrite, StdErr, StdOut, WriteLine, WriteString;
from M2RTS import HALT, ExitOnHalt;
from Lexer import Lexer, lexer_destroy, lexer_initialize;
from Transpiler import transpile;
from CommandLineInterface import CommandLine, parse_command_line;
from Parser import AstModule, parse;
from Strings import Length;
var
command_line: ^CommandLine;
proc compile_from_stream();
var
lexer: Lexer;
source_input: File;
source_output: File;
ast_module: ^AstModule;
begin
source_input := OpenToRead(command_line^.input);
if IsNoError(source_input) = false then
WriteString(StdErr, 'Fatal error: failed to read the input file "');
WriteString(StdErr, command_line^.input);
WriteString(StdErr, '".');
WriteLine(StdErr);
ExitOnHalt(2)
end;
source_output := nil;
if Length(command_line^.output) > 0 then
source_output := OpenToWrite(command_line^.output);
if IsNoError(source_output) = false then
WriteString(StdErr, 'Fatal error: failed to create the output file "');
WriteString(StdErr, command_line^.output);
WriteString(StdErr, '".');
WriteLine(StdErr);
ExitOnHalt(2)
end
end;
if IsNoError(source_input) then
lexer_initialize(@lexer, source_input);
ast_module := parse(@lexer);
transpile(ast_module, StdOut, source_output, command_line^.input);
lexer_destroy(@lexer);
Close(source_output);
Close(source_input)
end
end;
begin
ExitOnHalt(0);
command_line := parse_command_line();
if command_line <> nil then
compile_from_stream()
end;
if command_line = nil then
ExitOnHalt(1)
end;
HALT()
end.

28
source/Lexer.elna
View File

@@ -3,7 +3,7 @@
obtain one at https://mozilla.org/MPL/2.0/. *)
module;
import Common, cstdlib;
import cstdio, cstring, common;
const
CHUNK_SIZE := 85536;
@@ -11,10 +11,10 @@ const
type
(*
* Classification table assigns each possible character to a group (class). All
* characters of the same group a handled equivalently.
*
* Classification:
*)
* characters of the same group a handled equivalently.
*
* Classification:
*)
TransitionClass = (
invalid,
digit,
@@ -293,7 +293,7 @@ begin
i := 129u;
while i <= 256u do
classification[i] := TransitionClass.other;
i := i + 1
i := i + 1u
end
end;
@@ -410,16 +410,16 @@ begin
if lexer^.start.iterator^ = '"' then
text_length := lexer^.current.iterator - lexer^.start.iterator + 1;
MemZero(@token^.stringKind, #size(ShortString));
MemCopy(lexer^.start.iterator, text_length, @token^.stringKind);
memset(@token^.stringKind, 0, #size(ShortString));
memcpy(@token^.stringKind, lexer^.start.iterator, text_length);
token^.kind := LexerKind.character
end;
if lexer^.start.iterator^ = "'" then
text_length := lexer^.current.iterator - lexer^.start.iterator + 1;
MemZero(@token^.stringKind, #size(ShortString));
MemCopy(lexer^.start.iterator, text_length, @token^.stringKind);
memset(@token^.stringKind, 0, #size(ShortString));
memcpy(@token^.stringKind, lexer^.start.iterator, text_length);
token^.kind := LexerKind.string
end;
@@ -432,7 +432,7 @@ begin
token^.kind := LexerKind.identifier;
token^.identifierKind[1] := cast(lexer^.current.iterator - lexer^.start.iterator: Char);
MemCopy(lexer^.start.iterator, ORD(token^.identifierKind[1]), @token^.identifierKind[2]);
memcpy(@token^.identifierKind[2], lexer^.start.iterator, ORD(token^.identifierKind[1]));
if compare_keyword("program", lexer^.start, lexer^.current.iterator) then
token^.kind := LexerKind._program
@@ -590,8 +590,8 @@ begin
token^.kind := LexerKind.integer;
integer_length := lexer^.current.iterator - lexer^.start.iterator;
MemZero(@token^.identifierKind, #size(Identifier));
MemCopy(lexer^.start.iterator, integer_length, @token^.identifierKind[1]);
memset(@token^.identifierKind, 0, #size(Identifier));
memcpy(@token^.identifierKind[1], lexer^.start.iterator, integer_length);
buffer := InitStringCharStar(@token^.identifierKind[1]);
token^.integerKind := StringToInteger(buffer, 10, found);
@@ -889,7 +889,7 @@ begin
lexer^.length := 0;
lexer^.buffer := malloc(CHUNK_SIZE);
MemZero(lexer^.buffer, CHUNK_SIZE);
memset(lexer^.buffer, 0, CHUNK_SIZE);
lexer^.size := CHUNK_SIZE
end;

12
source/Parser.elna
View File

@@ -3,11 +3,7 @@
obtain one at https://mozilla.org/MPL/2.0/. *)
module;
import cstdlib;
from MemUtils import MemZero;
from Common import Identifier, ShortString;
from Lexer import Lexer, LexerToken, lexer_current, lexer_lex;
import cstdlib, common, Lexer;
type
Parser = record
@@ -237,7 +233,7 @@ begin
end
end;
current_field := current_field + 1;
MemZero(current_field, #size(AstFieldDeclaration));
memset(current_field, 0, #size(AstFieldDeclaration));
return field_declarations
end;
@@ -331,7 +327,7 @@ begin
token := parser_lex(parser^.lexer)
end;
current_case := current_case + 1;
MemZero(current_case, #size(Identifier));
memset(current_case, 0, #size(Identifier));
return result
end;
@@ -608,7 +604,7 @@ begin
token := parser_lex(parser^.lexer)
end;
current_symbol := current_symbol + 1;
MemZero(current_symbol, #size(Identifier));
memset(current_symbol, 0, #size(Identifier));
token := parser_lex(parser^.lexer);

110
source/Transpiler.elna
View File

@@ -6,7 +6,7 @@ module;
from FIO import File, WriteNBytes, WriteLine, WriteChar, WriteString;
from NumberIO import IntToStr;
from Common import Identifier, ShortString;
import common;
from Parser import AstLiteralKind, AstUnaryOperator, AstBinaryOperator, AstModule, AstExpression, AstLiteral,
AstConstantDeclaration, AstStatement, AstTypedDeclaration, AstCompoundStatement, AstProcedureDeclaration,
AstVariableDeclaration, AstImportStatement, AstTypeExpression, AstFieldDeclaration;
@@ -26,7 +26,7 @@ begin
count := 0;
while count < context^.indentation do
WriteString(context^.output, ' ');
WriteString(context^.output, " ");
count := count + 1u
end
end;
@@ -43,17 +43,17 @@ var
written_bytes: Word;
current_symbol: ^Identifier;
begin
WriteString(context^.output, 'FROM ');
WriteString(context^.output, "FROM ");
written_bytes := WriteNBytes(context^.output, ORD(import_statement^.package[1]), @import_statement^.package[2]);
WriteString(context^.output, ' IMPORT ');
WriteString(context^.output, " IMPORT ");
current_symbol := import_statement^.symbols;
written_bytes := WriteNBytes(context^.output, ORD(current_symbol^[1]), @current_symbol^[2]);
current_symbol := current_symbol + 1;
while ORD(current_symbol^[1]) <> 0 do
WriteString(context^.output, ', ');
WriteString(context^.output, ", ");
written_bytes := WriteNBytes(context^.output, ORD(current_symbol^[1]), @current_symbol^[2]);
current_symbol := current_symbol + 1;
end;
@@ -76,10 +76,10 @@ var
buffer: [20]CHAR;
written_bytes: Word;
begin
WriteString(context^.output, ' ');
WriteString(context^.output, " ");
written_bytes := WriteNBytes(context^.output, ORD(declaration^.constant_name[1]), @declaration^.constant_name[2]);
WriteString(context^.output, ' = ');
WriteString(context^.output, " = ");
IntToStr(declaration^.constant_value, 0, buffer);
WriteString(context^.output, buffer);
@@ -92,7 +92,7 @@ var
current_declaration: ^^AstConstantDeclaration;
begin
if declarations^ <> nil then
WriteString(context^.output, 'CONST');
WriteString(context^.output, "CONST");
WriteLine(context^.output);
current_declaration := declarations;
@@ -110,9 +110,9 @@ end;
proc transpile_module(context: ^TranspilerContext, result: ^AstModule);
begin
if result^.main = false then
WriteString(context^.output, 'IMPLEMENTATION ')
WriteString(context^.output, "IMPLEMENTATION ")
end;
WriteString(context^.output, 'MODULE ');
WriteString(context^.output, "MODULE ");
(* Write the module name and end the line with a semicolon and newline. *)
transpile_module_name(context);
@@ -129,10 +129,10 @@ begin
transpile_procedure_part(context, result^.procedures);
transpile_statement_part(context, result^.statements);
WriteString(context^.output, 'END ');
WriteString(context^.output, "END ");
transpile_module_name(context);
WriteChar(context^.output, '.');
WriteChar(context^.output, ".");
WriteLine(context^.output)
end;
@@ -144,10 +144,10 @@ begin
current_field := fields;
while ORD(current_field^.field_name[1]) <> 0 do
WriteString(context^.output, ' ');
WriteString(context^.output, " ");
written_bytes := WriteNBytes(context^.output, ORD(current_field^.field_name[1]), @current_field^.field_name[2]);
WriteString(context^.output, ': ');
WriteString(context^.output, ": ");
transpile_type_expression(context, current_field^.field_type);
current_field := current_field + 1;
@@ -161,15 +161,15 @@ end;
proc transpile_record_type(context: ^TranspilerContext, type_expression: ^AstTypeExpression);
begin
WriteString(context^.output, 'RECORD');
WriteString(context^.output, "RECORD");
WriteLine(context^.output);
transpile_type_fields(context, type_expression^.fields);
WriteString(context^.output, ' END')
WriteString(context^.output, " END")
end;
proc transpile_pointer_type(context: ^TranspilerContext, type_expression: ^AstTypeExpression);
begin
WriteString(context^.output, 'POINTER TO ');
WriteString(context^.output, "POINTER TO ");
transpile_type_expression(context, type_expression^.target)
end;
@@ -178,17 +178,17 @@ proc transpile_array_type(context: ^TranspilerContext, type_expression: ^AstType
var
buffer: [20]CHAR;
begin
WriteString(context^.output, 'ARRAY');
WriteString(context^.output, "ARRAY");
if type_expression^.length <> 0 then
WriteString(context^.output, '[1..');
WriteString(context^.output, "[1..");
IntToStr(type_expression^.length, 0, buffer);
WriteString(context^.output, buffer);
WriteChar(context^.output, ']')
end;
WriteString(context^.output, ' OF ');
WriteString(context^.output, " OF ");
transpile_type_expression(context, type_expression^.base)
end;
@@ -200,22 +200,22 @@ var
begin
current_case := type_expression^.cases;
WriteString(context^.output, '(');
WriteString(context^.output, "(");
WriteLine(context^.output);
WriteString(context^.output, ' ');
WriteString(context^.output, " ");
written_bytes := WriteNBytes(context^.output, ORD(current_case^[1]), @current_case^[2]);
current_case := current_case + 1;
while ORD(current_case^[1]) <> 0 do
WriteChar(context^.output, ',');
WriteLine(context^.output);
WriteString(context^.output, ' ');
WriteString(context^.output, " ");
written_bytes := WriteNBytes(context^.output, ORD(current_case^[1]), @current_case^[2]);
current_case := current_case + 1
end;
WriteLine(context^.output);
WriteString(context^.output, ' )')
WriteString(context^.output, " )")
end;
proc transpile_named_type(context: ^TranspilerContext, type_expression: ^AstTypeExpression);
@@ -231,7 +231,7 @@ var
current_parameter: ^^AstTypeExpression;
parameter_count: Word;
begin
WriteString(context^.output, 'PROCEDURE(');
WriteString(context^.output, "PROCEDURE(");
current_parameter := type_expression^.parameters;
while current_parameter^ <> nil do
@@ -240,7 +240,7 @@ begin
current_parameter := current_parameter + 1;
if current_parameter^ <> nil then
WriteString(context^.output, ', ')
WriteString(context^.output, ", ")
end
end;
WriteChar(context^.output, ')')
@@ -272,10 +272,10 @@ proc transpile_type_declaration(context: ^TranspilerContext, declaration: ^AstTy
var
written_bytes: Word;
begin
WriteString(context^.output, ' ');
WriteString(context^.output, " ");
written_bytes := WriteNBytes(context^.output, ORD(declaration^.identifier[1]), @declaration^.identifier[2]);
WriteString(context^.output, ' = ');
WriteString(context^.output, " = ");
transpile_type_expression(context, declaration^.type_expression);
write_semicolon(context^.output)
@@ -286,7 +286,7 @@ var
current_declaration: ^^AstTypedDeclaration;
begin
if declarations^ <> nil then
WriteString(context^.output, 'TYPE');
WriteString(context^.output, "TYPE");
WriteLine(context^.output);
current_declaration := declarations;
@@ -303,10 +303,10 @@ proc transpile_variable_declaration(context: ^TranspilerContext, declaration: ^A
var
written_bytes: Word;
begin
WriteString(context^.output, ' ');
WriteString(context^.output, " ");
written_bytes := WriteNBytes(context^.output, ORD(declaration^.variable_name[1]), @declaration^.variable_name[2]);
WriteString(context^.output, ': ');
WriteString(context^.output, ": ");
transpile_type_expression(context, declaration^.variable_type);
write_semicolon(context^.output)
@@ -317,7 +317,7 @@ var
current_declaration: ^^AstVariableDeclaration;
begin
if declarations^ <> nil then
WriteString(context^.output, 'VAR');
WriteString(context^.output, "VAR");
WriteLine(context^.output);
current_declaration := declarations;
@@ -338,7 +338,7 @@ var
parameter_index: Word;
current_parameter: ^AstTypedDeclaration;
begin
WriteString(context^.output, 'PROCEDURE ');
WriteString(context^.output, "PROCEDURE ");
written_bytes := WriteNBytes(context^.output, ORD(declaration^.name[1]), @declaration^.name[2]);
WriteChar(context^.output, '(');
@@ -347,22 +347,22 @@ begin
while parameter_index < declaration^.parameter_count do
written_bytes := WriteNBytes(context^.output, ORD(current_parameter^.identifier[1]), @current_parameter^.identifier[2]);
WriteString(context^.output, ': ');
WriteString(context^.output, ": ");
transpile_type_expression(context, current_parameter^.type_expression);
parameter_index := parameter_index + 1u;
current_parameter := current_parameter + 1;
if parameter_index <> declaration^.parameter_count then
WriteString(context^.output, '; ')
WriteString(context^.output, "; ")
end
end;
WriteString(context^.output, ')');
WriteString(context^.output, ")");
(* Check for the return type and write it. *)
if declaration^.return_type <> nil then
WriteString(context^.output, ': ');
WriteString(context^.output, ": ");
transpile_type_expression(context, declaration^.return_type)
end;
write_semicolon(context^.output)
@@ -388,10 +388,10 @@ begin
| AstBinaryOperator.not_equals: WriteChar(context^.output, '#')
| AstBinaryOperator.less: WriteChar(context^.output, '<')
| AstBinaryOperator.greater: WriteChar(context^.output, '>')
| AstBinaryOperator.less_equal: WriteString(context^.output, '<=')
| AstBinaryOperator.greater_equal: WriteString(context^.output, '>=')
| AstBinaryOperator.disjunction: WriteString(context^.output, 'OR')
| AstBinaryOperatorConjunction: WriteString(context^.output, 'AND')
| AstBinaryOperator.less_equal: WriteString(context^.output, "<=")
| AstBinaryOperator.greater_equal: WriteString(context^.output, ">=")
| AstBinaryOperator.disjunction: WriteString(context^.output, "OR")
| AstBinaryOperatorConjunction: WriteString(context^.output, "AND")
end
end;
@@ -414,13 +414,13 @@ begin
WriteString(context^.output, literal^.string)
end;
if literal^.kind = AstLiteralKind.null then
WriteString(context^.output, 'NIL')
WriteString(context^.output, "NIL")
end;
if (literal^.kind = AstLiteralKind.boolean) & literal^.boolean then
WriteString(context^.output, 'TRUE')
WriteString(context^.output, "TRUE")
end;
if (literal^.kind = AstLiteralKind.boolean) & (literal^.boolean = false) then
WriteString(context^.output, 'FALSE')
WriteString(context^.output, "FALSE")
end
end;
if expression^.kind = astExpressionKindIdentifier then
@@ -466,7 +466,7 @@ begin
current_argument := current_argument + 1;
while argument_index < expression^.argument_count do
WriteString(context^.output, ', ');
WriteString(context^.output, ", ");
transpile_expression(context, current_argument^);
@@ -480,44 +480,44 @@ end;
proc transpile_if_statement(context: ^TranspilerContext, statement: ^AstStatement);
begin
WriteString(context^.output, 'IF ');
WriteString(context^.output, "IF ");
transpile_expression(context, statement^.if_condition);
WriteString(context^.output, ' THEN');
WriteString(context^.output, " THEN");
WriteLine(context^.output);
context^.indentation := context^.indentation + 1u;
transpile_compound_statement(context, statement^.if_branch);
context^.indentation := context^.indentation - 1u;
indent(context);
WriteString(context^.output, 'END')
WriteString(context^.output, "END")
end;
proc transpile_while_statement(context: ^TranspilerContext, statement: ^AstStatement);
begin
WriteString(context^.output, 'WHILE ');
WriteString(context^.output, "WHILE ");
transpile_expression(context, statement^.while_condition);
WriteString(context^.output, ' DO');
WriteString(context^.output, " DO");
WriteLine(context^.output);
context^.indentation := context^.indentation + 1u;
transpile_compound_statement(context, statement^.while_body);
context^.indentation := context^.indentation - 1u;
indent(context);
WriteString(context^.output, 'END')
WriteString(context^.output, "END")
end;
proc transpile_assignment_statement(context: ^TranspilerContext, statement: ^AstStatement);
begin
transpile_expression(context, statement^.assignee);
WriteString(context^.output, ' := ');
WriteString(context^.output, " := ");
transpile_expression(context, statement^.assignment)
end;
proc transpile_return_statement(context: ^TranspilerContext, statement: ^AstStatement);
begin
WriteString(context^.output, 'RETURN ');
WriteString(context^.output, "RETURN ");
transpile_expression(context, statement^.returned)
end;
@@ -567,7 +567,7 @@ end;
proc transpile_statement_part(context: ^TranspilerContext, compound: AstCompoundStatement);
begin
if compound.count > 0 then
WriteString(context^.output, 'BEGIN');
WriteString(context^.output, "BEGIN");
WriteLine(context^.output);
context^.indentation := context^.indentation + 1u;
@@ -586,7 +586,7 @@ begin
transpile_variable_part(context, declaration^.variables, false);
transpile_statement_part(context, declaration^.statements);
WriteString(context^.output, 'END ');
WriteString(context^.output, "END ");
written_bytes := WriteNBytes(context^.output, ORD(declaration^.name[1]), @declaration^.name[2]);
write_semicolon(context^.output)

11
source/cctype.elna Normal file
View File

@@ -0,0 +1,11 @@
(* This Source Code Form is subject to the terms of the Mozilla Public License,
v. 2.0. If a copy of the MPL was not distributed with this file, You can
obtain one at https://mozilla.org/MPL/2.0/. *)
module;
proc isdigit(c: Int ) -> Int; extern;
proc isalnum(c: Int) -> Int; extern;
proc isalpha(c: Int) -> Int; extern;
proc isspace(c: Int) -> Int; extern;
end.

1
source/Common.elna → source/common.elna
View File

@@ -10,6 +10,5 @@ type
line: Word;
column: Word
end;
FILE* = record end;
end.

23
source/cstdio.elna Normal file
View File

@@ -0,0 +1,23 @@
(* This Source Code Form is subject to the terms of the Mozilla Public License,
v. 2.0. If a copy of the MPL was not distributed with this file, You can
obtain one at https://mozilla.org/MPL/2.0/. *)
module;
type
FILE* = record end;
proc fopen(pathname: ^Char, mode: ^Char) -> ^FILE; extern;
proc fclose(stream: ^FILE) -> Int; extern;
proc fseek(stream: ^FILE, off: Int, whence: Int) -> Int; extern;
proc rewind(stream: ^FILE); extern;
proc ftell(stream: ^FILE) -> Int; extern;
proc fflush(stream: ^FILE) -> Int; extern;
proc fread(ptr: Pointer, size: Word, nmemb: Word, stream: ^FILE) -> Word; extern;
proc perror(s: ^Char); extern;
proc puts(s: ^Char) -> Int; extern;
proc putchar(c: Int) -> Int; extern;
end.

13
source/cstdlib.elna Normal file
View File

@@ -0,0 +1,13 @@
(* This Source Code Form is subject to the terms of the Mozilla Public License,
v. 2.0. If a copy of the MPL was not distributed with this file, You can
obtain one at https://mozilla.org/MPL/2.0/. *)
module;
proc malloc(size: Word) -> Pointer; extern;
proc free(ptr: Pointer); extern;
proc calloc(nmemb: Word, size: Word) -> Pointer; extern;
proc realloc(ptr: Pointer, size: Word) -> Pointer; extern;
proc exit(code: Int) -> !; extern;
end.

15
source/cstring.elna Normal file
View File

@@ -0,0 +1,15 @@
(* This Source Code Form is subject to the terms of the Mozilla Public License,
v. 2.0. If a copy of the MPL was not distributed with this file, You can
obtain one at https://mozilla.org/MPL/2.0/. *)
module;
proc memset(ptr: Pointer, c: Int, n: Int) -> ^Char; extern;
proc memcpy(dst: Pointer, src: Pointer, n: Word); extern;
proc strcmp(s1: ^Char, s2: ^Char) -> Int; extern;
proc strncmp(s1: ^Char, s2: ^Char, n: Word) -> Int; extern;
proc strncpy(dst: ^Char, src: ^Char, dsize: Word) -> ^Char; extern;
proc strcpy(dst: ^Char, src: ^Char) -> ^Char; extern;
proc strlen(ptr: ^Char) -> Word; extern;
end.

57
source/main.elna
View File

@@ -3,7 +3,7 @@
obtain one at https://mozilla.org/MPL/2.0/. *)
program;
import Common, Lexer;
import cstdlib, cstring, cstdio, cctype, common, Lexer;
const
SEEK_SET* := 0;
@@ -127,30 +127,8 @@ type
External procedures.
*)
proc fopen(pathname: ^Char, mode: ^Char) -> ^FILE; extern;
proc fclose(stream: ^FILE) -> Int; extern;
proc fseek(stream: ^FILE, off: Int, whence: Int) -> Int; extern;
proc rewind(stream: ^FILE); extern;
proc ftell(stream: ^FILE) -> Int; extern;
proc fread(ptr: Pointer, size: Word, nmemb: Word, stream: ^FILE) -> Word; extern;
proc write(fd: Int, buf: Pointer, Word: Int) -> Int; extern;
proc malloc(size: Word) -> Pointer; extern;
proc free(ptr: Pointer); extern;
proc calloc(nmemb: Word, size: Word) -> Pointer; extern;
proc realloc(ptr: Pointer, size: Word) -> Pointer; extern;
proc memset(ptr: ^Char, c: Int, n: Int) -> ^Char; extern;
proc strcmp(s1: ^Char, s2: ^Char) -> Int; extern;
proc strncmp(s1: ^Char, s2: ^Char, n: Word) -> Int; extern;
proc strncpy(dst: ^Char, src: ^Char, dsize: Word) -> ^Char; extern;
proc strcpy(dst: ^Char, src: ^Char) -> ^Char; extern;
proc strlen(ptr: ^Char) -> Word; extern;
proc perror(s: ^Char); extern;
proc exit(code: Int) -> !; extern;
(*
Standard procedures.
*)
@@ -161,12 +139,12 @@ end;
proc write_s(value: String);
begin
write(0, cast(value.ptr: Pointer), cast(value.length: Int))
write(1, cast(value.ptr: Pointer), cast(value.length: Int))
end;
proc write_z(value: ^Char);
begin
write(0, cast(value: Pointer), cast(strlen(value): Int))
write(1, cast(value: Pointer), cast(strlen(value): Int))
end;
proc write_b(value: Bool);
@@ -180,7 +158,8 @@ end;
proc write_c(value: Char);
begin
write(0, cast(@value: Pointer), 1)
putchar(cast(value: Int));
fflush(nil)
end;
proc write_i(value: Int);
@@ -212,22 +191,6 @@ begin
write_i(cast(value: Int))
end;
proc is_digit(c: Char) -> Bool;
return cast(c: Int) >= cast('0': Int) & cast(c: Int) <= cast('9': Int)
end;
proc is_alpha(c: Char) -> Bool;
return cast(c: Int) >= cast('A': Int) & cast(c: Int) <= cast('z': Int)
end;
proc is_alnum(c: Char) -> Bool;
return is_digit(c) or is_alpha(c)
end;
proc is_space(c: Char) -> Bool;
return c = ' ' or c = '\n' or c = '\t'
end;
proc substring(string: String, start: Word, count: Word) -> String;
return String(string.ptr + start, count)
end;
@@ -412,7 +375,7 @@ proc lexer_spaces(source_code: ^SourceCode);
var
current: Char;
begin
while ~source_code_empty(source_code) & is_space(source_code_head(source_code^)) do
while ~source_code_empty(source_code) & isspace(cast(source_code_head(source_code^): Int)) <> 0 do
current := source_code_head(source_code^);
if current = '\n' then
@@ -424,7 +387,7 @@ end;
(* Checker whether the character is allowed in an identificator. *)
proc lexer_is_ident(char: Char) -> Bool;
return is_alnum(char) or char = '_'
return isalnum(cast(char: Int)) <> 0 or char = '_'
end;
proc lexer_identifier(source_code: ^SourceCode, token_content: ^StringBuffer);
@@ -511,7 +474,7 @@ proc lexer_number(source_code: ^SourceCode, token_content: ^Int);
begin
token_content^ := 0;
while ~source_code_empty(source_code) & is_digit(source_code_head(source_code^)) do
while ~source_code_empty(source_code) & isdigit(cast(source_code_head(source_code^): Int)) <> 0 do
token_content^ := token_content^ * 10 + (cast(source_code_head(source_code^): Int) - cast('0': Int));
source_code_advance(source_code)
@@ -607,7 +570,7 @@ begin
first_char := source_code_head(source_code);
if is_alpha(first_char) or first_char = '_' then
if isalpha(cast(first_char: Int)) <> 0 or first_char = '_' then
lexer_identifier(@source_code, token_buffer);
current_token := lexer_categorize(string_buffer_clear(token_buffer))
elsif first_char = '#' then
@@ -616,7 +579,7 @@ begin
current_token.kind := TokenKind.trait;
current_token.value.string := string_dup(string_buffer_clear(token_buffer))
elsif is_digit(first_char) then
elsif isdigit(cast(first_char: Int)) <> 0 then
lexer_number(@source_code, @current_token.value.int_value);
if source_code_expect(@source_code, 'u') then