author | etisserant |
Thu, 28 Feb 2008 18:10:01 +0100 | |
changeset 112 | 0c8d1b0c957a |
parent 47 | 017efb738d95 |
child 136 | 32bd7ef40897 |
permissions | -rwxr-xr-x |
0
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1 |
/* |
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* (c) 2003 Mario de Sousa |
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* |
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* Offered to the public under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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* Public License for more details. |
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* |
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* This code is made available on the understanding that it will not be |
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* used in safety-critical situations without a full and competent review. |
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*/ |
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|
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/* |
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* An IEC 61131-3 IL and ST compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*/ |
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/* |
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**************************************************************** |
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**************************************************************** |
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**************************************************************** |
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********* ********* |
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********* ********* |
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********* O V E R A L L A R C H I T E C T U R E ********* |
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********* ********* |
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********* ********* |
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**************************************************************** |
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**************************************************************** |
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**************************************************************** |
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The compiler works in 4(+1) stages: |
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Stage 1 - Lexical analyser - implemented with flex (iec.flex) |
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Stage 2 - Syntax parser - implemented with bison (iec.y) |
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Stage 3 - Semantics analyser - not yet implemented |
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Stage 4 - Code generator - implemented in C++ |
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Stage 4+1 - Binary code generator - gcc, javac, etc... |
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Data structures passed between stages, in global variables: |
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1->2 : tokens (int), and token values (char *) |
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2->1 : symbol tables (defined in symtable.hh) |
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2->3 : abstract syntax tree (tree of C++ classes, in absyntax.hh file) |
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3->4 : Same as 2->3 |
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4->4+1 : file with program in c, java, etc... |
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The compiler works in several passes: |
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Pass 1: executes stages 1 and 2 simultaneously |
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Pass 2: executes stage 3 |
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Pass 3: executes stage 4 |
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Pass 4: executes stage 4+1 |
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*/ |
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//#include <stdio.h> // printf() |
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#include <stdlib.h> // EXIT_FAILURE |
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#include "absyntax/absyntax.hh" // symbol_c type |
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/* A macro for printing out internal parser errors... */ |
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#include <iostream> // required for std::cerr |
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#define ERROR error_exit(__FILE__,__LINE__) |
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void error_exit(const char *file_name, int line_no) { |
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std::cerr << "\nInternal program error in file " << file_name |
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<< " at line " << line_no << "\n\n\n"; |
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exit(EXIT_FAILURE); |
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} |
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/* forward declarations... */ |
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int stage1_2(const char *filename, const char *includedir, symbol_c **tree_root); |
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//int stage3(symbol_c *tree_root); |
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int stage4(symbol_c *tree_root, const char *builddir); |
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static void printusage(const char *cmd) { |
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printf("%s [<input_file>] [-I <include_directory>] [<target_directory>]\n", cmd); |
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} |
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int main(int argc, char **argv) { |
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symbol_c *tree_root; |
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char * includedir = NULL; |
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char * builddir = NULL; |
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if (argc == 5) { |
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builddir = argv[4]; |
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argc = 4; |
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} |
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if (argc == 4) { |
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if (strcmp(argv[2], "-I") != 0) { |
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printusage(argv[0]); |
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return EXIT_FAILURE; |
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} |
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includedir = argv[3]; |
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argc = 2; |
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} |
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if (argc == 3) { |
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builddir = argv[2]; |
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argc = 2; |
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} |
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if (argc != 2) { |
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printusage(argv[0]); |
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return EXIT_FAILURE; |
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} |
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diff
changeset
|
122 |
|
fb772792efd1
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etisserant
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123 |
/* 1st Pass */ |
fb772792efd1
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124 |
if (stage1_2(argv[1], includedir, &tree_root) < 0) |
fb772792efd1
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etisserant
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125 |
return EXIT_FAILURE; |
fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
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|
126 |
|
fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
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127 |
/* 2nd Pass */ |
fb772792efd1
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etisserant
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128 |
/* not yet implemented... */ |
fb772792efd1
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etisserant
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129 |
/* |
fb772792efd1
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etisserant
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130 |
if (stage3(tree_root) < 0) |
fb772792efd1
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etisserant
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131 |
return EXIT_FAILURE; |
fb772792efd1
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etisserant
parents:
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132 |
*/ |
fb772792efd1
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etisserant
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133 |
|
fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
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134 |
/* 3rd Pass */ |
46
fc1b78ea6d84
Adding support for generating files into an user-defined folder
lbessard
parents:
0
diff
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|
135 |
if (stage4(tree_root, builddir) < 0) |
0
fb772792efd1
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136 |
return EXIT_FAILURE; |
fb772792efd1
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etisserant
parents:
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|
137 |
|
fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
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138 |
/* 4th Pass */ |
fb772792efd1
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etisserant
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139 |
/* Currently implemented in the Makefile! */ |
fb772792efd1
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etisserant
parents:
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140 |
|
fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
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141 |
return 0; |
fb772792efd1
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etisserant
parents:
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142 |
} |
fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
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143 |
|
fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
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changeset
|
144 |