gzdoom-gles/tools/re2c/main.cc

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/* $Id: main.cc,v 1.53 2006/05/14 13:38:26 helly Exp $ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#elif defined(_WIN32)
#include "config_w32.h"
#endif
#include <fstream>
#include <iostream>
#include <stdlib.h>
#include <string.h>
#include "globals.h"
#include "parser.h"
#include "dfa.h"
#include "mbo_getopt.h"
namespace re2c
{
file_info sourceFileInfo;
file_info outputFileInfo;
bool bFlag = false;
bool dFlag = false;
bool eFlag = false;
bool fFlag = false;
bool gFlag = false;
bool iFlag = false;
bool sFlag = false;
bool wFlag = false;
bool bSinglePass = false;
bool bLastPass = false;
bool bUsedYYAccept = false;
bool bUsedYYMaxFill = false;
bool bUsedYYMarker = true;
bool bUseStartLabel= false;
bool bUseStateNext = false;
bool bUseYYFill = true;
std::string startLabelName;
uint maxFill = 1;
uint next_label = 0;
uint cGotoThreshold = 9;
uint topIndent = 0;
std::string indString("\t");
bool yybmHexTable = false;
bool bUseStateAbort = false;
bool bWroteGetState = false;
uint nRealChars = 256;
uint next_fill_index = 0;
uint last_fill_index = 0;
std::set<uint> vUsedLabels;
using namespace std;
static char *opt_arg = NULL;
static int opt_ind = 1;
static const mbo_opt_struct OPTIONS[] =
{
mbo_opt_struct('?', 0, "help"),
mbo_opt_struct('b', 0, "bit-vectors"),
mbo_opt_struct('d', 0, "debug-output"),
mbo_opt_struct('e', 0, "ecb"),
mbo_opt_struct('f', 0, "storable-state"),
mbo_opt_struct('g', 0, "computed-gotos"),
mbo_opt_struct('h', 0, "help"),
mbo_opt_struct('i', 0, "no-debug-info"),
mbo_opt_struct('o', 1, "output"),
mbo_opt_struct('s', 0, "nested-ifs"),
mbo_opt_struct('v', 0, "version"),
mbo_opt_struct('V', 0, "vernum"),
mbo_opt_struct('w', 0, "wide-chars"),
mbo_opt_struct('1', 0, "two-pass"),
mbo_opt_struct('-', 0, NULL) /* end of args */
};
static void usage()
{
cerr << "usage: re2c [-bdefghisvVw1] [-o file] file\n"
"\n"
"-? -h --help Display this info.\n"
"\n"
"-b --bit-vectors Implies -s. Use bit vectors as well in the attempt to\n"
" coax better code out of the compiler. Most useful for\n"
" specifications with more than a few keywords (e.g. for\n"
" most programming languages).\n"
"\n"
"-d --debug-output Creates a parser that dumps information during\n"
" about the current position and in which state the\n"
" parser is.\n"
"\n"
"-e --ecb Cross-compile from an ASCII platform to\n"
" an EBCDIC one.\n"
"\n"
"-f --storable-state Generate a scanner that supports storable states.\n"
"\n"
"-g --computed-gotos Implies -b. Generate computed goto code (only useable\n"
" with gcc).\n"
"\n"
"-i --no-debug-info Do not generate '#line' info (usefull for versioning).\n"
"\n"
"-o --output=output Specify the output file instead of stdout\n"
" This cannot be used together with -e switch.\n"
"\n"
"-s --nested-ifs Generate nested ifs for some switches. Many compilers\n"
" need this assist to generate better code.\n"
"\n"
"-v --version Show version information.\n"
"-V --vernum Show version as one number.\n"
"\n"
"-w --wide-chars Create a parser that supports wide chars (UCS-2). This\n"
" implies -s and cannot be used together with -e switch.\n"
"\n"
"-1 --single-pass Force single pass generation, this cannot be combined\n"
" with -f and disables YYMAXFILL generation prior to last\n"
" re2c block.\n"
;
}
} // end namespace re2c
using namespace re2c;
int main(int argc, char *argv[])
{
int c;
const char *sourceFileName = 0;
const char *outputFileName = 0;
if (argc == 1)
{
usage();
return 2;
}
while ((c = mbo_getopt(argc, argv, OPTIONS, &opt_arg, &opt_ind, 0)) != -1)
{
switch (c)
{
case 'b':
bFlag = true;
sFlag = true;
break;
case 'e':
xlat = asc2ebc;
talx = ebc2asc;
eFlag = true;
break;
case 'd':
dFlag = true;
break;
case 'f':
fFlag = true;
if (bSinglePass) {
std::cerr << "re2c: error: cannot combine -1 and -f switch\n";
return 1;
}
break;
case 'g':
gFlag = true;
bFlag = true;
sFlag = true;
break;
case 'i':
iFlag = true;
break;
case 'o':
outputFileName = opt_arg;
break;
case 's':
sFlag = true;
break;
case '1':
if (bFlag) {
std::cerr << "re2c: error: cannot combine -1 and -f switch\n";
return 1;
}
bSinglePass = true;
break;
case 'v':
cout << "re2c " << PACKAGE_VERSION << "\n";
return 2;
case 'V': {
string vernum(PACKAGE_VERSION);
if (vernum[1] == '.')
{
vernum.insert(0, "0");
}
vernum.erase(2, 1);
if (vernum[3] == '.')
{
vernum.insert(2, "0");
}
vernum.erase(4, 1);
if (vernum.length() < 6 || vernum[5] < '0' || vernum[5] > '9')
{
vernum.insert(4, "0");
}
vernum.resize(6);
cout << vernum << endl;
return 2;
}
case 'w':
nRealChars = (1<<16);
sFlag = true;
wFlag = true;
break;
case 'h':
case '?':
default:
usage();
return 2;
}
}
if (wFlag && eFlag)
{
usage();
return 2;
}
else if (argc == opt_ind + 1)
{
sourceFileName = argv[opt_ind];
}
else
{
usage();
return 2;
}
// set up the source stream
re2c::ifstream_lc source;
if (sourceFileName[0] == '-' && sourceFileName[1] == '\0')
{
if (fFlag)
{
std::cerr << "re2c: error: multiple /*!re2c stdin is not acceptable when -f is specified\n";
return 1;
}
sourceFileName = "<stdin>";
source.open(stdin);
}
else if (!source.open(sourceFileName).is_open())
{
cerr << "re2c: error: cannot open " << sourceFileName << "\n";
return 1;
}
// set up the output stream
re2c::ofstream_lc output;
if (outputFileName == 0 || (sourceFileName[0] == '-' && sourceFileName[1] == '\0'))
{
outputFileName = "<stdout>";
output.open(stdout);
}
else if (!output.open(outputFileName).is_open())
{
cerr << "re2c: error: cannot open " << outputFileName << "\n";
return 1;
}
Scanner scanner(sourceFileName, source, output);
sourceFileInfo = file_info(sourceFileName, &scanner);
outputFileInfo = file_info(outputFileName, &output);
if (!bSinglePass)
{
bUsedYYMarker = false;
re2c::ifstream_lc null_source;
if (!null_source.open(sourceFileName).is_open())
{
cerr << "re2c: error: cannot re-open " << sourceFileName << "\n";
return 1;
}
null_stream null_dev;
Scanner null_scanner(sourceFileName, null_source, null_dev);
parse(null_scanner, null_dev);
next_label = 0;
next_fill_index = 0;
Symbol::ClearTable();
bWroteGetState = false;
bUsedYYMaxFill = false;
}
bLastPass = true;
parse(scanner, output);
return 0;
}