132 lines
3.1 KiB
C
132 lines
3.1 KiB
C
/*
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* $Id: awk01.c 441 2011-04-22 14:28:43Z hyunghwan.chung $
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*
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Copyright 2006-2012 Chung, Hyung-Hwan.
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This file is part of QSE.
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QSE is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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QSE is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with QSE. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <qse/awk/stdawk.h>
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#include <qse/cmn/sio.h>
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const qse_char_t* src = QSE_T("BEGIN { print \"hello, world\" | \"dir\"; }");
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struct rtx_xtn_t
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{
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qse_awk_rio_impl_t old_pipe_handler;
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};
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static qse_ssize_t new_pipe_handler (
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qse_awk_rtx_t* rtx, qse_awk_rio_cmd_t cmd, qse_awk_rio_arg_t* riod,
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qse_char_t* data, qse_size_t size)
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{
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struct rtx_xtn_t* xtn;
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xtn = qse_awk_rtx_getxtnstd (rtx);
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if (cmd == QSE_AWK_RIO_OPEN)
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qse_fprintf (QSE_STDERR, QSE_T("LOG: Executing [%s] for piping\n"), riod->name);
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return xtn->old_pipe_handler (rtx, cmd, riod, data, size);
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}
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static void extend_pipe_handler (qse_awk_rtx_t* rtx)
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{
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/* this function simply demonstrates how to extend
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* runtime I/O handlers provided by qse_awk_rtx_openstd() */
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struct rtx_xtn_t* xtn;
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qse_awk_rio_t rio;
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xtn = qse_awk_rtx_getxtnstd (rtx);
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/* get the previous handler functions */
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qse_awk_rtx_getrio (rtx, &rio);
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/* remember the old pipe handler function */
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xtn->old_pipe_handler = rio.pipe;
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/* change the pipe handler to a new one */
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rio.pipe = new_pipe_handler;
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/* changes the handlers with a new set */
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qse_awk_rtx_setrio (rtx, &rio);
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}
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int main ()
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{
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qse_awk_t* awk = QSE_NULL;
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qse_awk_rtx_t* rtx = QSE_NULL;
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qse_awk_val_t* retv;
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qse_awk_parsestd_t psin[2];
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int ret = -1;
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qse_openstdsios ();
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awk = qse_awk_openstd (0, QSE_NULL);
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if (awk == QSE_NULL)
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{
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qse_fprintf (QSE_STDERR, QSE_T("ERROR: cannot open awk\n"));
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goto oops;
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}
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psin[0].type = QSE_AWK_PARSESTD_STR;
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psin[0].u.str.ptr = src;
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psin[0].u.str.len = qse_strlen(src);
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psin[1].type = QSE_AWK_PARSESTD_NULL;
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if (qse_awk_parsestd (awk, psin, QSE_NULL) <= -1)
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{
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qse_fprintf (QSE_STDERR, QSE_T("ERROR: %s\n"),
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qse_awk_geterrmsg(awk));
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goto oops;
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}
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rtx = qse_awk_rtx_openstd (
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awk,
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QSE_SIZEOF(struct rtx_xtn_t),
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QSE_T("awk11"),
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QSE_NULL, /* stdin */
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QSE_NULL, /* stdout */
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QSE_NULL /* default cmgr */
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);
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if (rtx == QSE_NULL)
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{
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qse_fprintf (QSE_STDERR, QSE_T("ERROR: %s\n"),
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qse_awk_geterrmsg(awk));
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goto oops;
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}
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extend_pipe_handler (rtx);
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retv = qse_awk_rtx_loop (rtx);
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if (retv == QSE_NULL)
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{
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qse_fprintf (QSE_STDERR, QSE_T("ERROR: %s\n"),
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qse_awk_rtx_geterrmsg(rtx));
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goto oops;
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}
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qse_awk_rtx_refdownval (rtx, retv);
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ret = 0;
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oops:
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if (rtx != QSE_NULL) qse_awk_rtx_close (rtx);
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if (awk != QSE_NULL) qse_awk_close (awk);
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qse_closestdsios ();
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return ret;
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}
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