144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
#include <qse/awk/stdawk.h>
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#include <qse/si/sio.h>
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#include <qse/cmn/main.h>
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#include "awk00.h"
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static const qse_char_t* src = QSE_T(
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"function pow(x,y) { return x ** y; }"
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);
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static int awk_main (int argc, qse_char_t* argv[])
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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_parsestd_t psin[2];
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qse_char_t* str;
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qse_size_t len;
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qse_awk_val_t* rtv;
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qse_awk_val_t* arg[2] = { QSE_NULL, QSE_NULL };
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int ret = -1, i, opt;
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qse_awk_fun_t* fun;
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/* create an awk object */
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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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/* get the awk's trait */
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qse_awk_getopt (awk, QSE_AWK_TRAIT, &opt);
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/* change the trait value to disallow BEGIN, END, pattern-action blocks */
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opt &= ~QSE_AWK_PABLOCK;
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/* update the trait */
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qse_awk_setopt (awk, QSE_AWK_TRAIT, &opt);
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/* prepare an awk script to parse */
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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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/* parse the script */
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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"), qse_awk_geterrmsg(awk));
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goto oops;
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}
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/* create a runtime context */
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rtx = qse_awk_rtx_openstd (
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awk,
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0,
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QSE_T("awk05"),
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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"), qse_awk_geterrmsg(awk));
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goto oops;
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}
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/* create the first argument to the pow function to call */
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arg[0] = qse_awk_rtx_makeintval (rtx, 50);
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if (arg[0] == QSE_NULL)
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{
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qse_fprintf (QSE_STDERR, QSE_T("ERROR: %s\n"), qse_awk_rtx_geterrmsg(rtx));
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goto oops;
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}
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qse_awk_rtx_refupval (rtx, arg[0]);
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/* create the second argument to the pow function to call */
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arg[1] = qse_awk_rtx_makeintval (rtx, 3);
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if (arg[1] == QSE_NULL)
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{
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qse_fprintf (QSE_STDERR, QSE_T("ERROR: %s\n"), qse_awk_rtx_geterrmsg(rtx));
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goto oops;
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}
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qse_awk_rtx_refupval (rtx, arg[1]);
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/* find the pow function */
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fun = qse_awk_rtx_findfun (rtx, QSE_T("pow"));
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if (fun == QSE_NULL)
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{
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qse_fprintf (QSE_STDERR, QSE_T("ERROR: %s\n"), qse_awk_rtx_geterrmsg(rtx));
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goto oops;
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}
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/* call the function found */
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rtv = qse_awk_rtx_callfun (rtx, fun, arg, 2);
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if (rtv == QSE_NULL)
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{
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qse_fprintf (QSE_STDERR, QSE_T("ERROR: %s\n"), qse_awk_rtx_geterrmsg(rtx));
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goto oops;
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}
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/* duplicate the return value to a string */
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str = qse_awk_rtx_valtostrdup (rtx, rtv, &len);
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/* clear the return value */
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qse_awk_rtx_refdownval (rtx, rtv);
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if (str == QSE_NULL)
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{
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qse_fprintf (QSE_STDERR, QSE_T("ERROR: %s\n"), qse_awk_rtx_geterrmsg(rtx));
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goto oops;
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}
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qse_printf (QSE_T("[%.*s]\n"), (int)len, str);
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/* destroy the duplicated string */
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qse_awk_rtx_freemem (rtx, str);
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ret = 0;
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oops:
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/* dereference all arguments */
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for (i = 0; i < QSE_COUNTOF(arg); i++)
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{
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if (arg[i]) qse_awk_rtx_refdownval (rtx, arg[i]);
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}
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/* destroy a runtime context */
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if (rtx) qse_awk_rtx_close (rtx);
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/* destroy the processor */
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if (awk) qse_awk_close (awk);
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return ret;
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}
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int qse_main (int argc, qse_achar_t* argv[])
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{
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int x;
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qse_open_stdsios ();
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init_awk_sample_locale ();
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x = qse_run_main (argc, argv, awk_main);
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qse_close_stdsios ();
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return x;
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}
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