static int rex_main (int argc, qse_char_t* argv[])
{
qse_rex_t* rex;
qse_rex_node_t* start;
qse_cstr_t str;
qse_cstr_t matstr;
int n;
if (argc != 3)
{
qse_printf (QSE_T("USAGE: %s pattern string\n"),
qse_basename(argv[0]));
return -1;
}
rex = qse_rex_open (QSE_MMGR_GETDFL(), 0, QSE_NULL);
if (rex == QSE_NULL)
{
qse_printf (QSE_T("ERROR: cannot open rex\n"));
return -1;
}
qse_rex_setopt (rex, QSE_REX_STRICT);
start = qse_rex_comp (rex, argv[1], qse_strlen(argv[1]));
if (start == QSE_NULL)
{
qse_printf (QSE_T("ERROR: cannot compile - %s\n"),
qse_rex_geterrmsg(rex));
qse_rex_close (rex);
return -1;
}
str.ptr = argv[2];
str.len = qse_strlen(argv[2]);
qse_printf (QSE_T("compile ok\n"));
n = qse_rex_exec (rex, &str, &str, &matstr);
if (n <= -1)
{
qse_printf (QSE_T("ERROR: cannot execute - %s\n"),
qse_rex_geterrmsg(rex));
qse_rex_close (rex);
return -1;
}
if (n >= 1)
{
qse_printf (QSE_T("MATCH: [%.*s] beginning from char #%d\n"),
(int)matstr.len, matstr.ptr,
(int)(matstr.ptr - str.ptr + 1));
}
qse_rex_close (rex);
return 0;
}
static void print_usage (qse_sio_t* out, int argc, qse_char_t* argv[])
{
const qse_char_t* b = qse_basename (argv[0]);
qse_fprintf (out, QSE_T("USAGE: %s [options] script [file]\n"), b);
qse_fprintf (out, QSE_T(" %s [options] -f script-file [file]\n"), b);
qse_fprintf (out, QSE_T(" %s [options] -e script [file]\n"), b);
qse_fprintf (out, QSE_T("options as follows:\n"));
qse_fprintf (out, QSE_T(" -h/--help show this message\n"));
qse_fprintf (out, QSE_T(" --version show version\n"));
qse_fprintf (out, QSE_T(" -n disable auto-print\n"));
qse_fprintf (out, QSE_T(" -e script specify a script\n"));
qse_fprintf (out, QSE_T(" -f file specify a script file\n"));
qse_fprintf (out, QSE_T(" -o file specify an output file\n"));
qse_fprintf (out, QSE_T(" -r use the extended regular expression\n"));
qse_fprintf (out, QSE_T(" -R enable non-standard extensions to the regular\n"));
qse_fprintf (out, QSE_T(" expression\n"));
qse_fprintf (out, QSE_T(" -i perform in-place editing. imply -s\n"));
qse_fprintf (out, QSE_T(" -s process input files separately\n"));
qse_fprintf (out, QSE_T(" -a perform strict address and label check\n"));
qse_fprintf (out, QSE_T(" -b allow extended address formats\n"));
qse_fprintf (out, QSE_T(" <start~step>,<start,+line>,<start,~line>,<0,/regex/>\n"));
qse_fprintf (out, QSE_T(" -x allow text on the same line as c, a, i\n"));
qse_fprintf (out, QSE_T(" -y ensure a newline at text end\n"));
qse_fprintf (out, QSE_T(" -m number specify the maximum amount of memory to use in bytes\n"));
qse_fprintf (out, QSE_T(" -w expand file wildcards\n"));
#if defined(QSE_ENABLE_SEDTRACER)
qse_fprintf (out, QSE_T(" -t print command traces\n"));
#endif
#if defined(QSE_BUILD_DEBUG)
qse_fprintf (out, QSE_T(" -X number fail the number'th memory allocation\n"));
#endif
#if defined(QSE_CHAR_IS_WCHAR)
qse_fprintf (out, QSE_T(" --script-encoding string specify script file encoding name\n"));
qse_fprintf (out, QSE_T(" --infile-encoding string specify input file encoding name\n"));
qse_fprintf (out, QSE_T(" --outfile-encoding string specify output file encoding name\n"));
#endif
}