From f146dac784325c9403499046f52f70e3596ae345 Mon Sep 17 00:00:00 2001 From: Nagi5Yeq Date: Tue, 12 May 2020 01:52:49 +0800 Subject: initial commit --- .clang-format | 36 ++++++ .gitignore | 2 + CMakeLists.txt | 41 +++++++ COPYING | 340 ++++++++++++++++++++++++++++++++++++++++++++++++++++ Context.cc | 11 ++ Context.hh | 22 ++++ Driver.cc | 21 ++++ Driver.hh | 28 +++++ Lexer.l | 198 ++++++++++++++++++++++++++++++ Log.cc | 31 +++++ Log.hh | 17 +++ Parser.y | 247 ++++++++++++++++++++++++++++++++++++++ Version.cc | 31 +++++ Version.hh | 27 +++++ getopt.c | 223 ++++++++++++++++++++++++++++++++++ getopt.h | 59 +++++++++ main.cc | 40 +++++++ node/BaseNode.cc | 6 + node/BaseNode.hh | 21 ++++ node/LiteralNode.cc | 22 ++++ node/LiteralNode.hh | 17 +++ t/1.pas | 17 +++ 22 files changed, 1457 insertions(+) create mode 100644 .clang-format create mode 100644 .gitignore create mode 100644 CMakeLists.txt create mode 100644 COPYING create mode 100644 Context.cc create mode 100644 Context.hh create mode 100644 Driver.cc create mode 100644 Driver.hh create mode 100755 Lexer.l create mode 100644 Log.cc create mode 100644 Log.hh create mode 100644 Parser.y create mode 100644 Version.cc create mode 100644 Version.hh create mode 100644 getopt.c create mode 100644 getopt.h create mode 100644 main.cc create mode 100644 node/BaseNode.cc create mode 100644 node/BaseNode.hh create mode 100644 node/LiteralNode.cc create mode 100644 node/LiteralNode.hh create mode 100644 t/1.pas diff --git a/.clang-format b/.clang-format new file mode 100644 index 0000000..497ab0b --- /dev/null +++ b/.clang-format @@ -0,0 +1,36 @@ +#基于哪个配置文件 +BasedOnStyle: LLVM +#指针的*的挨着哪边 +PointerAlignment: Left +#缩进宽度 +IndentWidth: 4 +#连续的空行保留几行 +MaxEmptyLinesToKeep: 1 +#是否允许短方法单行 +AllowShortFunctionsOnASingleLine: true +#是否允许短if单行 If true, if (a) return; 可以放到同一行 +AllowShortIfStatementsOnASingleLine: true +#注释对齐 +AlignTrailingComments: true +#换行的时候对齐操作符 +#AlignOperands: true +#多行声明语句按照=对齐 +AlignConsecutiveDeclarations: true +#连续的赋值语句以 = 为中心对齐 +AlignConsecutiveAssignments: false +AlignConsecutiveDeclarations: false +#等号两边的空格 +SpaceBeforeAssignmentOperators: true +#缩进 +IndentWrappedFunctionNames: true +#在block从空行开始 +KeepEmptyLinesAtTheStartOfBlocks: true +#在构造函数初始化时按逗号断行，并以冒号对齐 +BreakConstructorInitializersBeforeComma: true +#函数参数换行 +AllowAllParametersOfDeclarationOnNextLine: true +#括号后添加空格 +SpaceAfterCStyleCast: true +#tab键盘的宽度 +TabWidth: 4 +UseTab: Never diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..5acb669 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +build +.vscode diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..473eb3d --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,41 @@ +cmake_minimum_required(VERSION 3.4) +project(pcc) + +find_package(LLVM REQUIRED CONFIG) +include_directories(${LLVM_INCLUDE_DIRS}) +add_definitions(${LLVM_DEFINITIONS}) + +find_package(BISON REQUIRED) +find_package(FLEX REQUIRED) + +bison_target(pcc_parser Parser.y ${CMAKE_CURRENT_BINARY_DIR}/Parser.cc) +flex_target(pcc_lexer Lexer.l ${CMAKE_CURRENT_BINARY_DIR}/Lexer.cc) +add_flex_bison_dependency(pcc_lexer pcc_parser) + +add_definitions(-DPCC_OSNAME="${CMAKE_SYSTEM}") + +set(PCC_SOURCE + Context.cc + Driver.cc + Lexer.cc + Log.cc + main.cc + Parser.cc + Version.cc) + +list(APPEND PCC_SOURCE + node/BaseNode.cc + node/LiteralNode.cc) + +list(APPEND PCC_SOURCE + ${BISON_pcc_parser_OUTPUT} + ${FLEX_pcc_lexer_OUTPUT}) + +add_executable(pcc ${PCC_SOURCE}) +target_include_directories(pcc PRIVATE + ${CMAKE_SOURCE_DIR} + ${CMAKE_SOURCE_DIR}/node + ${CMAKE_CURRENT_BINARY_DIR}) + +llvm_map_components_to_libnames(llvm_libs support core irreader all) +target_link_libraries(pcc ${llvm_libs}) diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..623b625 --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Context.cc b/Context.cc new file mode 100644 index 0000000..ee88544 --- /dev/null +++ b/Context.cc @@ -0,0 +1,11 @@ +#include + +#include "Context.hh" + +namespace pcc { +llvm::LLVMContext GlobalContext; + +Context::Context(const char* name) + : builder_(GlobalContext) + , module_(name, GlobalContext) {} +} // namespace pcc diff --git a/Context.hh b/Context.hh new file mode 100644 index 0000000..bc66632 --- /dev/null +++ b/Context.hh @@ -0,0 +1,22 @@ +#ifndef PCC_CONTEXT_H +#define PCC_CONTEXT_H + +#include +#include + +namespace pcc { +class Driver; +class Context { + public: + Context(const char* name); + + private: + llvm::IRBuilder<> builder_; + llvm::Module module_; + friend class Driver; +}; + +extern llvm::LLVMContext GlobalContext; +} // namespace pcc + +#endif diff --git a/Driver.cc b/Driver.cc new file mode 100644 index 0000000..3fefd8c --- /dev/null +++ b/Driver.cc @@ -0,0 +1,21 @@ +#include "Driver.hh" + +namespace pcc { +Driver::Driver(Context* context) + : context_(context) {} + +Driver::~Driver() {} + +void Driver::Parse(const std::string& filename) { + if (StartLexer(filename) != 0) { + return; + } + Parser parser(*this); + parser.parse(); + StopLexer(); +} + +llvm::Module* Driver::GetModule() { return &context_->module_; } + +llvm::IRBuilder<>* Driver::GetBuilder() { return &context_->builder_; } +} // namespace pcc diff --git a/Driver.hh b/Driver.hh new file mode 100644 index 0000000..5fc5d83 --- /dev/null +++ b/Driver.hh @@ -0,0 +1,28 @@ +#ifndef PCC_DRIVER_H +#define PCC_DRIVER_H + +#include + +#include "Context.hh" +#include "Parser.hh" + +#define YY_DECL pcc::Parser::symbol_type yylex(pcc::Driver& driver) + +YY_DECL; + +namespace pcc { +class Driver { + public: + Driver(Context* context); + ~Driver(); + int StartLexer(const std::string& filename); + void StopLexer(); + void Parse(const std::string& filename); + llvm::Module* GetModule(); + llvm::IRBuilder<>* GetBuilder(); + + Context* context_; +}; +} // namespace pcc + +#endif diff --git a/Lexer.l b/Lexer.l new file mode 100755 index 0000000..fad699f --- /dev/null +++ b/Lexer.l @@ -0,0 +1,198 @@ +%{ +#include +#include +#include +#include +#include + +#include "Log.hh" +#include "Driver.hh" + +using token=pcc::Parser::token; + +namespace pcc { + class Lexer; + char ToLower(char c){ + return static_cast(std::tolower(static_cast(c))); + } +} + +%} + +%option nodefault +%option never-interactive +%option nounistd +%option case-insensitive +%option noyywrap nounput noinput + +decimal ([1-9][0-9]*)|0 +octal 0[0-7]* +hexadecimal 0[xX][0-9a-fA-F] + +integer [+-]?({decimal}|{octal}|{hexadecimal}) + +real_exp [0-9]*(\.[0-9]*)?[eE]{decimal} +real_noexp [0-9]*\.[0-9]* + +real [+-]?({real_exp}|{real_noexp}) + +char [0-9a-zA-Z_{}[\]#()<>%:;.?*+\-/^&|~!=,\\" \t\n\v\f] +escaped_char \\[\'?\\abfnrtv] +hex_char \\x[0-9a-fA-F]{1,2} +oct_char \\[0-7]{1,3} + +string '({char}|{escaped_char}|{hex_char}|{oct_char}|\\')*' + +identifier [a-z][0-9a-z]* + +white [\t\f\n\r ] + +%% + +":=" {return token::ASSIGN;} +":" {return token::COLON;} +";" {return token::SEMICOLON;} +"." {return token::DOT;} +"[" {return token::LBRACKET;} +"]" {return token::RBRACKET;} +"(" {return token::LPARENTHESIS;} +")" {return token::RPARENTHESIS;} + +"+" {return token::ADD;} +"-" {return token::SUB;} +"*" {return token::MUL;} +"/" {return token::REAL_DIV;} +"div" {return token::DIV;} +"mod" {return token::MOD;} +"**" {return token::EXP;} + +"and" {return token::AND;} +"not" {return token::NOT;} +"or" {return token::OR;} +"xor" {return token::XOR;} + +"<" {return token::LT;} +"<=" {return token::LE;} +">" {return token::GT;} +">=" {return token::GE;} +"=" {return token::EQ;} +"<>" {return token::NE;} + +"begin" {return token::BEGINS;} +"end" {return token::ENDS;} +"program" {return token::PROGRAM;} +"function" {return token::FUNCTION;} +"const" {return token::CONST;} +"var" {return token::VAR;} +"if" {return token::IF;} +"then" {return token::THEN;} +"else" {return token::ELSE;} +"while" {return token::WHILE;} +"do" {return token::DO;} +"integer" {return token::INTEGER;} +"boolean" {return token::BOOLEAN;} +"char" {return token::CHAR;} +"real" {return token::REAL;} +"string" {return token::STRING;} +"true" {return token::TRUE;} +"false" {return token::FALSE;} + +{integer} { + int number = std::strtol(yytext, NULL, 0); + return pcc::Parser::make_INTEGER_LITERAL(number); +} + +{real} { + float number = std::strtof(yytext, NULL); + return pcc::Parser::make_REAL_LITERAL(number); +} + +{string} { + static std::map escape_map={ + {'\'','\''}, + {'?','\?'}, + {'\\','\\'}, + {'a','\a'}, + {'b','\b'}, + {'f','\f'}, + {'n','\n'}, + {'r','\r'}, + {'t','\t'}, + {'v','\v'} + }; + char *str = new char[yyleng]; + char *p = str; + int i = 1; + while(i='0' && yytext[i+1]<='7'){ + char c[4], *cend; + c[0]=yytext[i+1]; + if(i+3 +#include + +namespace pcc { +enum LogLevel { PCC_ERROR, PCC_WARNING, PCC_INFO, PCC_DEBUG }; + +extern LogLevel CurrentLogLevel; + +void SetLogLevel(LogLevel level); + +void Log(LogLevel level, const char* format, ...); +} // namespace pcc + +#endif diff --git a/Parser.y b/Parser.y new file mode 100644 index 0000000..bbad3fb --- /dev/null +++ b/Parser.y @@ -0,0 +1,247 @@ +%language "c++" +%require "3.2" + +%code requires { +#include + +namespace pcc { + class Driver; +} +} + +%param {pcc::Driver& driver} + +%code { +#include "Driver.hh" +} + +%define api.namespace {pcc} +%define api.parser.class {Parser} +%define api.value.type variant +%define api.token.constructor +%define parse.error verbose +%define parse.assert + +%token COLON SEMICOLON COMMA DOT ASSIGN LBRACKET RBRACKET LPARENTHESIS RPARENTHESIS +%token PROGRAM IDENTIFIER CONST VAR BEGINS ENDS FUNCTION +%token IF THEN ELSE WHILE DO +%token INTEGER BOOLEAN CHAR REAL STRING +%token ADD SUB MUL REAL_DIV DIV MOD EXP LT LE GT GE EQ NE +%token AND NOT OR XOR TRUE FALSE +%token INTEGER_LITERAL REAL_LITERAL STRING_LITERAL + +%type INTEGER_LITERAL +%type REAL_LITERAL +%type STRING_LITERAL +%type IDENTIFIER + +%% + +/* ==================[global part]================== */ + +program + : program_decl global_decls function_decls + ; + +program_decl + : PROGRAM IDENTIFIER SEMICOLON + ; + +global_decls + : var_block + ; + +function_decls + : function_decls function_decl + | + ; + +/* ==================[var part]================== */ + +var_block + : VAR var_decls SEMICOLON + ; + +var_decls + : var_decls SEMICOLON var_decl + | var_decl + ; + +var_decl + : vars COLON var_type + ; + +vars + : vars COMMA IDENTIFIER + | IDENTIFIER + +var_type + : INTEGER + | REAL + | BOOLEAN + | CHAR + | STRING + ; + +/* ==================[function part]================== */ + +function_decl + : function_header function_body + ; + +function_header + : FUNCTION IDENTIFIER LPARENTHESIS var_decls RPARENTHESIS COLON var_type SEMICOLON + ; + +function_body + : var_block statement_block SEMICOLON + | statement_block SEMICOLON + ; + +/* ==================[statements part]================== */ + +statements + : statements statement SEMICOLON + | + ; + +statement + : closed_statement + | open_statement + ; + +open_statement + : IF expression THEN statement + | IF expression THEN closed_statement ELSE open_statement + ; + +closed_statement + : normal_statement + | IF expression THEN closed_statement ELSE closed_statement + ; + +normal_statement + : statement_block + | empty_statement + | assign_statement + | while_statement + | expression_statement + ; + +statement_block + : BEGINS statements ENDS + ; + +empty_statement + : + ; + +assign_statement + : lvalue ASSIGN expression + ; + +while_statement + : WHILE expression DO statement + ; + +expression_statement + : function_call + ; + +/* ==================[expression part]================== */ + +expression + : l1_expression l1_operator expression + | l1_expression + ; + +l1_expression + : l1_expression l2_operator l2_expression + | l2_expression + ; + +l2_expression + : l2_expression l3_operator l3_expression + | l3_expression + ; + +l3_expression + : l3_expression l4_operator l4_expression + | l4_expression + +l4_expression + : lvalue + | function_call + | literal + | LPARENTHESIS expression RPARENTHESIS + | l5_operator l4_expression + ; + +l1_operator + : LT + | LE + | GT + | GE + | EQ + | NE + ; + +l2_operator + : ADD + | SUB + | OR + | XOR + ; + +l3_operator + : MUL + | REAL_DIV + | DIV + | MOD + | AND + ; + +l4_operator + : EXP + ; + +l5_operator + : NOT + | ADD + | SUB + ; + +lvalue + : IDENTIFIER + | IDENTIFIER LBRACKET expression RBRACKET + | IDENTIFIER DOT IDENTIFIER + ; + +function_call + : IDENTIFIER LPARENTHESIS arguments RPARENTHESIS + | IDENTIFIER LPARENTHESIS RPARENTHESIS + ; + +arguments + : arguments COMMA expression + | expression + ; + +literal + : TRUE + | FALSE + | INTEGER_LITERAL + | REAL_LITERAL + | STRING_LITERAL + ; + +%% + +namespace pcc { + + void Parser::error (const std::string& m) + { + std::cerr << m << '\n'; + } + +} diff --git a/Version.cc b/Version.cc new file mode 100644 index 0000000..9b8be86 --- /dev/null +++ b/Version.cc @@ -0,0 +1,31 @@ +#include "Version.hh" + +namespace pcc { + +PCC_NORETURN void ShowVersion() { + std::cerr + << PCC_NAME " version " PCC_VERSION_STRING "\n" + << "Copyright (C) 2020 Hanjie Wu \n" + "Platform: " PCC_OSNAME "\n" + "Built on " __DATE__ " " __TIME__ "\n\n" + "This program is free software; you can redistribute it and/or " + "modify\n" + "it under the terms of the GNU General Public License as published " + "by\n" + "the Free Software Foundation; either version 2 of the License, or\n" + "(at your option) any later version." + << std::endl; + std::exit(0); +} + +PCC_NORETURN void ShowHelp() { + std::cerr << PCC_NAME " version " PCC_VERSION_STRING "\n" + << "Usage: " PCC_NAME " [-vVh] file...\n" + << " -v Verbose mode.\n" + " -V Show version and exit.\n" + " -h Show this help and exit." + << std::endl; + std::exit(0); +} + +} // namespace pcc diff --git a/Version.hh b/Version.hh new file mode 100644 index 0000000..5b3a7ff --- /dev/null +++ b/Version.hh @@ -0,0 +1,27 @@ +#ifndef PCC_VERSION_H +#define PCC_VERSION_H + +#include +#include + +#define PCC_NAME "pcc" +#define PCC_VERSION_STRING "0.1.0" + +#ifndef PCC_OSNAME +#define PCC_OSNAME "unknown platform" +#endif + +#ifdef _MSC_VER +#define PCC_NORETURN __declspec(noreturn) +#else +#define PCC_NORETURN __attribute__((noreturn)) +#endif + +namespace pcc { + +PCC_NORETURN void ShowVersion(); +PCC_NORETURN void ShowHelp(); + +} // namespace pcc + +#endif diff --git a/getopt.c b/getopt.c new file mode 100644 index 0000000..b5eebdf --- /dev/null +++ b/getopt.c @@ -0,0 +1,223 @@ +/******************************************************************************* + * Copyright (c) 2012-2017, Kim Grasman + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Kim Grasman nor the + * names of contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL KIM GRASMAN BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ******************************************************************************/ + +#include "getopt.h" + +#include +#include + +char* optarg; +int optopt; +/* The variable optind [...] shall be initialized to 1 by the system. */ +int optind = 1; +int opterr; + +static char* optcursor = NULL; + +/* Implemented based on [1] and [2] for optional arguments. + optopt is handled FreeBSD-style, per [3]. + Other GNU and FreeBSD extensions are purely accidental. + +[1] http://pubs.opengroup.org/onlinepubs/000095399/functions/getopt.html +[2] http://www.kernel.org/doc/man-pages/online/pages/man3/getopt.3.html +[3] +http://www.freebsd.org/cgi/man.cgi?query=getopt&sektion=3&manpath=FreeBSD+9.0-RELEASE +*/ +int getopt(int argc, char* const argv[], const char* optstring) { + int optchar = -1; + const char* optdecl = NULL; + + optarg = NULL; + opterr = 0; + optopt = 0; + + /* Unspecified, but we need it to avoid overrunning the argv bounds. */ + if (optind >= argc) goto no_more_optchars; + + /* If, when getopt() is called argv[optind] is a null pointer, getopt() + shall return -1 without changing optind. */ + if (argv[optind] == NULL) goto no_more_optchars; + + /* If, when getopt() is called *argv[optind] is not the character '-', + getopt() shall return -1 without changing optind. */ + if (*argv[optind] != '-') goto no_more_optchars; + + /* If, when getopt() is called argv[optind] points to the string "-", + getopt() shall return -1 without changing optind. */ + if (strcmp(argv[optind], "-") == 0) goto no_more_optchars; + + /* If, when getopt() is called argv[optind] points to the string "--", + getopt() shall return -1 after incrementing optind. */ + if (strcmp(argv[optind], "--") == 0) { + ++optind; + goto no_more_optchars; + } + + if (optcursor == NULL || *optcursor == '\0') optcursor = argv[optind] + 1; + + optchar = *optcursor; + + /* FreeBSD: The variable optopt saves the last known option character + returned by getopt(). */ + optopt = optchar; + + /* The getopt() function shall return the next option character (if one is + found) from argv that matches a character in optstring, if there is + one that matches. */ + optdecl = strchr(optstring, optchar); + if (optdecl) { + /* [I]f a character is followed by a colon, the option takes an + argument. */ + if (optdecl[1] == ':') { + optarg = ++optcursor; + if (*optarg == '\0') { + /* GNU extension: Two colons mean an option takes an + optional arg; if there is text in the current argv-element + (i.e., in the same word as the option name itself, for + example, + "-oarg"), then it is returned in optarg, otherwise optarg is + set to zero. */ + if (optdecl[2] != ':') { + /* If the option was the last character in the string + pointed to by an element of argv, then optarg shall + contain the next element of argv, and optind shall be + incremented by 2. If the resulting value of optind is + greater than argc, this indicates a missing + option-argument, and getopt() shall return an error + indication. + + Otherwise, optarg shall point to the string following the + option character in that element of argv, and optind + shall be incremented by 1. + */ + if (++optind < argc) { + optarg = argv[optind]; + } else { + /* If it detects a missing option-argument, it shall + return the colon character ( ':' ) if the first + character of optstring was a colon, or a + question-mark character ( '?' ) otherwise. + */ + optarg = NULL; + optchar = (optstring[0] == ':') ? ':' : '?'; + } + } else { + optarg = NULL; + } + } + + optcursor = NULL; + } + } else { + /* If getopt() encounters an option character that is not contained in + optstring, it shall return the question-mark ( '?' ) character. */ + optchar = '?'; + } + + if (optcursor == NULL || *++optcursor == '\0') ++optind; + + return optchar; + +no_more_optchars: + optcursor = NULL; + return -1; +} + +/* Implementation based on [1]. + +[1] http://www.kernel.org/doc/man-pages/online/pages/man3/getopt.3.html +*/ +int getopt_long(int argc, char* const argv[], const char* optstring, + const struct option* longopts, int* longindex) { + const struct option* o = longopts; + const struct option* match = NULL; + int num_matches = 0; + size_t argument_name_length = 0; + const char* current_argument = NULL; + int retval = -1; + + optarg = NULL; + optopt = 0; + + if (optind >= argc) return -1; + + if (strlen(argv[optind]) < 3 || strncmp(argv[optind], "--", 2) != 0) + return getopt(argc, argv, optstring); + + /* It's an option; starts with -- and is longer than two chars. */ + current_argument = argv[optind] + 2; + argument_name_length = strcspn(current_argument, "="); + for (; o->name; ++o) { + if (strncmp(o->name, current_argument, argument_name_length) == 0) { + match = o; + ++num_matches; + } + } + + if (num_matches == 1) { + /* If longindex is not NULL, it points to a variable which is set to the + index of the long option relative to longopts. */ + if (longindex) *longindex = (match - longopts); + + /* If flag is NULL, then getopt_long() shall return val. + Otherwise, getopt_long() returns 0, and flag shall point to a + variable which shall be set to val if the option is found, but left + unchanged if the option is not found. */ + if (match->flag) *(match->flag) = match->val; + + retval = match->flag ? 0 : match->val; + + if (match->has_arg != no_argument) { + optarg = strchr(argv[optind], '='); + if (optarg != NULL) ++optarg; + + if (match->has_arg == required_argument) { + /* Only scan the next argv for required arguments. Behavior is + not + specified, but has been observed with Ubuntu and Mac OSX. */ + if (optarg == NULL && ++optind < argc) { + optarg = argv[optind]; + } + + if (optarg == NULL) retval = ':'; + } + } else if (strchr(argv[optind], '=')) { + /* An argument was provided to a non-argument option. + I haven't seen this specified explicitly, but both GNU and + BSD-based implementations show this behavior. + */ + retval = '?'; + } + } else { + /* Unknown option or ambiguous match. */ + retval = '?'; + } + + ++optind; + return retval; +} diff --git a/getopt.h b/getopt.h new file mode 100644 index 0000000..03f769f --- /dev/null +++ b/getopt.h @@ -0,0 +1,59 @@ +/******************************************************************************* + * Copyright (c) 2012-2017, Kim Grasman + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Kim Grasman nor the + * names of contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL KIM GRASMAN BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ******************************************************************************/ + +#ifndef INCLUDED_GETOPT_PORT_H +#define INCLUDED_GETOPT_PORT_H + +#if defined(__cplusplus) +extern "C" { +#endif + +#define no_argument 1 +#define required_argument 2 +#define optional_argument 3 + +extern char* optarg; +extern int optind, opterr, optopt; + +struct option { + const char* name; + int has_arg; + int* flag; + int val; +}; + +int getopt(int argc, char* const argv[], const char* optstring); + +int getopt_long(int argc, char* const argv[], const char* optstring, + const struct option* longopts, int* longindex); + +#if defined(__cplusplus) +} +#endif + +#endif // INCLUDED_GETOPT_PORT_H diff --git a/main.cc b/main.cc new file mode 100644 index 0000000..441dcf3 --- /dev/null +++ b/main.cc @@ -0,0 +1,40 @@ +#include + +#ifdef _MSC_VER +#include "getopt.h" +#else +#include +#endif + +#include "Driver.hh" +#include "Log.hh" +#include "Version.hh" + +int main(int argc, char* argv[]) { + int rv; + pcc::LogLevel level = pcc::PCC_WARNING; + while ((rv = getopt(argc, argv, "vVh")) != -1) { + switch (rv) { + case 'v': + level = pcc::PCC_DEBUG; + break; + case 'V': + pcc::ShowVersion(); + case 'h': + pcc::ShowHelp(); + default: + pcc::Log(pcc::PCC_ERROR, "Unknown option \"%c\".", rv); + pcc::ShowHelp(); + } + } + if (optind >= argc) { + pcc::Log(pcc::PCC_ERROR, "No input file specified"); + return 0; + } + for (int i = optind; i < argc; i++) { + pcc::Context context(argv[i]); + pcc::Driver driver(&context); + driver.Parse(argv[i]); + } + return 0; +} diff --git a/node/BaseNode.cc b/node/BaseNode.cc new file mode 100644 index 0000000..98ebb82 --- /dev/null +++ b/node/BaseNode.cc @@ -0,0 +1,6 @@ +#include "BaseNode.hh" + +namespace pcc { +BaseNode::BaseNode(Driver* driver) + : driver_(driver) {} +} // namespace pcc diff --git a/node/BaseNode.hh b/node/BaseNode.hh new file mode 100644 index 0000000..ae0ccea --- /dev/null +++ b/node/BaseNode.hh @@ -0,0 +1,21 @@ +#ifndef PCC_BASE_H +#define PCC_BASE_H + +#include + +#include "Driver.hh" + +namespace pcc { +using Value = llvm::Value*; + +class BaseNode { + public: + virtual Value CodeGen() = 0; + BaseNode(Driver* driver); + + protected: + Driver* driver_; +}; +} // namespace pcc + +#endif diff --git a/node/LiteralNode.cc b/node/LiteralNode.cc new file mode 100644 index 0000000..57cc65b --- /dev/null +++ b/node/LiteralNode.cc @@ -0,0 +1,22 @@ +#include "LiteralNode.hh" + +namespace pcc { +StringLiteralNode::StringLiteralNode(Driver* driver, char* value) + : BaseNode(driver) + , value_(value) {} + +Value StringLiteralNode::CodeGen() { + llvm::Module* module = driver_->GetModule(); + llvm::LLVMContext& context = module->getContext(); + llvm::Constant* str = llvm::ConstantDataArray::getString(context, value_); + llvm::Type* type = str->getType(); + llvm::GlobalVariable* var = new llvm::GlobalVariable( + *module, type, true, llvm::GlobalVariable::InternalLinkage, str); + llvm::Constant* zero = + llvm::Constant::getNullValue(llvm::IntegerType::getInt32Ty(context)); + llvm::Constant* indices[] = {zero, zero}; + llvm::Constant* ptr = + llvm::ConstantExpr::getGetElementPtr(type, var, indices, true); + return ptr; +} +} // namespace pcc diff --git a/node/LiteralNode.hh b/node/LiteralNode.hh new file mode 100644 index 0000000..2e9b43a --- /dev/null +++ b/node/LiteralNode.hh @@ -0,0 +1,17 @@ +#ifndef PCC_LITERALNODE_H +#define PCC_LITERALNODE_H + +#include "BaseNode.hh" + +namespace pcc { +class StringLiteralNode : public BaseNode { + public: + StringLiteralNode(Driver* driver, char* value); + Value CodeGen() override; + + private: + char* value_; +}; +} // namespace pcc + +#endif diff --git a/t/1.pas b/t/1.pas new file mode 100644 index 0000000..0275bbf --- /dev/null +++ b/t/1.pas @@ -0,0 +1,17 @@ +program a; +VAR + f : integer; + g : real; + h : boolean; + j : integer; + +function test(a:integer;b:string):char; +var s1:real; +begin + f:=b; + g:=c; + if g<=c then + h:=ture + else + h:=false; +end; -- cgit