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qse/ase/awk/func.c

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/*
* $Id: func.c,v 1.48 2006-09-11 14:29:22 bacon Exp $
*/
#include <xp/awk/awk_i.h>
#ifndef XP_AWK_STAND_ALONE
#include <xp/bas/assert.h>
#endif
#ifdef _WIN32
#include <tchar.h>
#include <math.h>
#else
#include <stdlib.h>
#include <math.h>
#endif
static int __bfn_close (xp_awk_t* awk, void* run);
static int __bfn_fflush (xp_awk_t* awk, void* run);
static int __bfn_index (xp_awk_t* awk, void* run);
static int __bfn_length (xp_awk_t* awk, void* run);
static int __bfn_substr (xp_awk_t* awk, void* run);
static int __bfn_split (xp_awk_t* awk, void* run);
static int __bfn_tolower (xp_awk_t* awk, void* run);
static int __bfn_toupper (xp_awk_t* awk, void* run);
static int __bfn_gsub (xp_awk_t* awk, void* run);
static int __bfn_system (xp_awk_t* awk, void* run);
static int __bfn_sin (xp_awk_t* awk, void* run);
/* TODO: move it under the awk structure... */
static xp_awk_bfn_t __sys_bfn[] =
{
/* io functions */
{ XP_T("close"), 5, XP_AWK_EXTIO, 1, 1, XP_NULL, __bfn_close },
{ XP_T("fflush"), 6, XP_AWK_EXTIO, 0, 1, XP_NULL, __bfn_fflush },
/* string functions */
{ XP_T("index"), 5, 0, 2, 2, XP_NULL, __bfn_index },
{ XP_T("length"), 6, 0, 1, 1, XP_NULL, __bfn_length },
{ XP_T("substr"), 6, 0, 2, 3, XP_NULL, __bfn_substr },
{ XP_T("split"), 5, 0, 2, 3, XP_T("vrv"), __bfn_split },
{ XP_T("tolower"), 7, 0, 1, 1, XP_NULL, __bfn_tolower },
{ XP_T("toupper"), 7, 0, 1, 1, XP_NULL, __bfn_toupper },
{ XP_T("gsub"), 4, 0, 2, 3, XP_T("vvr"), __bfn_gsub },
/* TODO: remove these two functions */
{ XP_T("system"), 6, 0, 1, 1, XP_NULL, __bfn_system },
{ XP_T("sin"), 3, 0, 1, 1, XP_NULL, __bfn_sin },
{ XP_NULL, 0, 0, 0, 0, XP_NULL, XP_NULL }
};
xp_awk_bfn_t* xp_awk_addbfn (
xp_awk_t* awk, const xp_char_t* name, xp_size_t name_len,
int when_valid, xp_size_t min_args, xp_size_t max_args,
const xp_char_t* arg_spec, int (*handler)(xp_awk_t*,void*))
{
xp_awk_bfn_t* p;
/* TODO: complete this function??? */
p = (xp_awk_bfn_t*) XP_AWK_MALLOC (awk, xp_sizeof(xp_awk_bfn_t));
if (p == XP_NULL) return XP_NULL;
/* NOTE: make sure that name is a constant string */
p->name = name;
p->name_len = name_len;
p->valid = when_valid;
p->min_args = min_args;
p->max_args = max_args;
p->arg_spec = arg_spec;
p->handler = handler;
p->next = awk->bfn.user;
awk->bfn.user = p;
return p;
}
int xp_awk_delbfn (xp_awk_t* awk, const xp_char_t* name, xp_size_t name_len)
{
xp_awk_bfn_t* p, * pp = XP_NULL;
for (p = awk->bfn.user; p != XP_NULL; p++)
{
if (xp_awk_strxncmp(p->name, p->name_len, name, name_len) == 0)
{
if (pp == XP_NULL)
awk->bfn.user = p->next;
else pp->next = p->next;
XP_AWK_FREE (awk, p);
return 0;
}
pp = p;
}
return -1;
}
void xp_awk_clrbfn (xp_awk_t* awk)
{
xp_awk_bfn_t* p, * np;
p = awk->bfn.user;
while (p != XP_NULL)
{
np = p;
XP_AWK_FREE (awk, p);
p = np;
}
awk->bfn.user = XP_NULL;
}
xp_awk_bfn_t* xp_awk_getbfn (
xp_awk_t* awk, const xp_char_t* name, xp_size_t name_len)
{
xp_awk_bfn_t* p;
for (p = __sys_bfn; p->name != XP_NULL; p++)
{
if (p->valid != 0 &&
(awk->option & p->valid) == 0) continue;
if (xp_awk_strxncmp (
p->name, p->name_len, name, name_len) == 0) return p;
}
/* TODO: user-added builtin functions... */
for (p = awk->bfn.user; p != XP_NULL; p = p->next)
{
if (p->valid != 0 &&
(awk->option & p->valid) == 0) continue;
if (xp_awk_strxncmp (
p->name, p->name_len, name, name_len) == 0) return p;
}
return XP_NULL;
}
static int __bfn_close (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_awk_val_t* v, * a0;
int n;
xp_char_t* name;
xp_size_t len;
nargs = xp_awk_getnargs (run);
xp_assert (nargs == 1);
/* TODO: support close (xxx, "to"/"from") like gawk */
a0 = xp_awk_getarg(run, 0);
xp_assert (a0 != XP_NULL);
if (a0->type == XP_AWK_VAL_STR)
{
name = ((xp_awk_val_str_t*)a0)->buf;
len = ((xp_awk_val_str_t*)a0)->len;
}
else
{
name = xp_awk_valtostr (run, a0, xp_true, XP_NULL, &len);
if (name == XP_NULL) return -1;
}
if (len == 0)
{
/* getline or print doesn't allow an emptry for the
* input or output file name. so close should not allow
* it either.
* another reason for this is if close is called explicitly
* with an empty string, it may close the console that uses
* an empty string for its identification because closeextio
* closes any extios that match the name given unlike
* closeextio_read or closeextio_write. */
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, name);
n = -1;
/* TODO: need to set ERRNO??? */
goto skip_close;
}
while (len > 0)
{
if (name[--len] == XP_T('\0'))
{
/* the name contains a null string.
* make close return -1 */
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, name);
n = -1;
/* TODO: need to set ERRNO??? */
goto skip_close;
}
}
n = xp_awk_closeextio (run, name);
if (n == -1 && ((xp_awk_run_t*)run)->errnum != XP_AWK_EIOHANDLER)
{
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, name);
return -1;
}
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, name);
skip_close:
v = xp_awk_makeintval (run, n);
if (v == XP_NULL)
{
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
xp_awk_setretval (run, v);
return 0;
}
static int __flush_extio (
xp_awk_run_t* run, int extio, const xp_char_t* name, int n)
{
int n2;
if (run->extio.handler[extio] != XP_NULL)
{
n2 = xp_awk_flushextio (run, extio, name);
if (n2 == -1)
{
if (run->errnum == XP_AWK_EIOHANDLER) n = -1;
else if (run->errnum == XP_AWK_ENOSUCHIO)
{
if (n != 0) n = -2;
}
else n = -99;
}
else if (n != -1) n = 0;
}
return n;
}
static int __bfn_fflush (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_awk_val_t* a0;
xp_char_t* str0;
xp_size_t len0;
int n;
nargs = xp_awk_getnargs (run);
xp_assert (nargs >= 0 && nargs <= 1);
if (nargs == 0)
{
/* flush the console output */
n = xp_awk_flushextio (run, XP_AWK_OUT_CONSOLE, XP_T(""));
if (n == -1 &&
((xp_awk_run_t*)run)->errnum != XP_AWK_EIOHANDLER &&
((xp_awk_run_t*)run)->errnum != XP_AWK_ENOSUCHIO)
{
return -1;
}
/* fflush() should return -1 on EIOHANDLER and ENOSUCHIO */
}
else
{
xp_char_t* ptr, * end;
a0 = xp_awk_getarg (run, 0);
if (a0->type == XP_AWK_VAL_STR)
{
str0 = ((xp_awk_val_str_t*)a0)->buf;
len0 = ((xp_awk_val_str_t*)a0)->len;
}
else
{
str0 = xp_awk_valtostr (
run, a0, xp_true, XP_NULL, &len0);
if (str0 == XP_NULL) return -1;
}
/* the target name contains a null character.
* make fflush return -1 and set ERRNO accordingly */
ptr = str0; end = str0 + len0;
while (ptr < end)
{
if (*ptr == XP_T('\0'))
{
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str0);
n = -1;
goto skip_flush;
}
ptr++;
}
/* flush the given extio */
n = 1;
n = __flush_extio (
run, XP_AWK_EXTIO_FILE,
((len0 == 0)? XP_NULL: str0), 1);
if (n == -99) return -1;
n = __flush_extio (
run, XP_AWK_EXTIO_PIPE,
((len0 == 0)? XP_NULL: str0), n);
if (n == -99) return -1;
n = __flush_extio (
run, XP_AWK_EXTIO_COPROC,
((len0 == 0)? XP_NULL: str0), n);
if (n == -99) return -1;
/* if n remains 1, no ip handlers have been defined for
* file, pipe, and coproc. so make fflush return -1.
* if n is -2, no such named io has been found at all
* if n is -1, the io handler has returned an error */
if (n != 0) n = -1;
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str0);
}
skip_flush:
a0 = xp_awk_makeintval (run, (xp_long_t)n);
if (a0 == XP_NULL)
{
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
xp_awk_setretval (run, a0);
return 0;
}
static int __bfn_index (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_awk_val_t* a0, * a1;
xp_char_t* str0, * str1, * ptr;
xp_size_t len0, len1;
xp_long_t idx;
nargs = xp_awk_getnargs (run);
xp_assert (nargs == 2);
a0 = xp_awk_getarg (run, 0);
a1 = xp_awk_getarg (run, 1);
if (a0->type == XP_AWK_VAL_STR)
{
str0 = ((xp_awk_val_str_t*)a0)->buf;
len0 = ((xp_awk_val_str_t*)a0)->len;
}
else
{
str0 = xp_awk_valtostr (run, a0, xp_true, XP_NULL, &len0);
if (str0 == XP_NULL) return -1;
}
if (a1->type == XP_AWK_VAL_STR)
{
str1 = ((xp_awk_val_str_t*)a1)->buf;
len1 = ((xp_awk_val_str_t*)a1)->len;
}
else
{
str1 = xp_awk_valtostr (run, a1, xp_true, XP_NULL, &len1);
if (str1 == XP_NULL)
{
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str0);
return -1;
}
}
ptr = xp_awk_strxnstr (str0, len0, str1, len1);
idx = (ptr == XP_NULL)? -1: (xp_long_t)(ptr - str0);
if (xp_awk_getopt(awk) & XP_AWK_STRINDEXONE) idx = idx + 1;
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str0);
if (a1->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str1);
a0 = xp_awk_makeintval (run, idx);
if (a0 == XP_NULL)
{
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
xp_awk_setretval (run, a0);
return 0;
}
static int __bfn_length (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_awk_val_t* v;
xp_char_t* str;
xp_size_t len;
nargs = xp_awk_getnargs (run);
xp_assert (nargs == 1);
v = xp_awk_getarg (run, 0);
if (v->type == XP_AWK_VAL_STR)
{
len = ((xp_awk_val_str_t*)v)->len;
}
else
{
str = xp_awk_valtostr (run, v, xp_true, XP_NULL, &len);
if (str == XP_NULL) return -1;
XP_AWK_FREE (awk, str);
}
v = xp_awk_makeintval (run, len);
if (v == XP_NULL)
{
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
xp_awk_setretval (run, v);
return 0;
}
static int __bfn_substr (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_awk_val_t* a0, * a1, * a2, * r;
xp_char_t* str;
xp_size_t len;
xp_long_t lindex, lcount;
xp_real_t rindex, rcount;
int n;
nargs = xp_awk_getnargs (run);
xp_assert (nargs >= 2 && nargs <= 3);
a0 = xp_awk_getarg (run, 0);
a1 = xp_awk_getarg (run, 1);
a2 = (nargs >= 3)? xp_awk_getarg (run, 2): XP_NULL;
if (a0->type == XP_AWK_VAL_STR)
{
str = ((xp_awk_val_str_t*)a0)->buf;
len = ((xp_awk_val_str_t*)a0)->len;
}
else
{
str = xp_awk_valtostr (run, a0, xp_true, XP_NULL, &len);
if (str == XP_NULL) return -1;
}
n = xp_awk_valtonum (run, a1, &lindex, &rindex);
if (n == -1)
{
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str);
return -1;
}
if (n == 1) lindex = (xp_long_t)rindex;
if (a2 == XP_NULL) lcount = (xp_long_t)len;
else
{
n = xp_awk_valtonum (run, a2, &lcount, &rcount);
if (n == -1)
{
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str);
return -1;
}
if (n == 1) lcount = (xp_long_t)rcount;
}
if (xp_awk_getopt(awk) & XP_AWK_STRINDEXONE) lindex = lindex - 1;
if (lindex >= len) lindex = len;
else if (lindex < 0) lindex = 0;
if (lcount < 0) lcount = 0;
else if (lcount > len - lindex) lcount = len - lindex;
r = xp_awk_makestrval (run, &str[lindex], (xp_size_t)lcount);
if (r == XP_NULL)
{
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str);
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str);
xp_awk_setretval (run, r);
return 0;
}
static int __bfn_split (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_awk_val_t* a0, * a1, * a2, * t1, * t2, ** a1ref;
xp_char_t* str, * str_free, * p, * tok;
xp_size_t str_len, str_left, tok_len;
xp_long_t num;
xp_char_t key[xp_sizeof(xp_long_t)*8+2];
xp_size_t key_len;
xp_char_t* fs_ptr, * fs_free;
xp_size_t fs_len;
void* fs_rex = XP_NULL;
void* fs_rex_free = XP_NULL;
int errnum;
nargs = xp_awk_getnargs (run);
xp_assert (nargs >= 2 && nargs <= 3);
a0 = xp_awk_getarg (run, 0);
a1 = xp_awk_getarg (run, 1);
a2 = (nargs >= 3)? xp_awk_getarg (run, 2): XP_NULL;
xp_assert (a1->type == XP_AWK_VAL_REF);
if (((xp_awk_val_ref_t*)a1)->id >= XP_AWK_VAL_REF_NAMEDIDX &&
((xp_awk_val_ref_t*)a1)->id <= XP_AWK_VAL_REF_ARGIDX)
{
/* an indexed value should not be assigned another map */
xp_awk_seterrnum (run, XP_AWK_EIDXVALASSMAP);
return -1;
}
a1ref = (xp_awk_val_t**)((xp_awk_val_ref_t*)a1)->adr;
if ((*a1ref)->type != XP_AWK_VAL_NIL &&
(*a1ref)->type != XP_AWK_VAL_MAP)
{
/* cannot change a scalar value to a map */
xp_awk_seterrnum (run, XP_AWK_ESCALARTOMAP);
return -1;
}
if (a0->type == XP_AWK_VAL_STR)
{
str = ((xp_awk_val_str_t*)a0)->buf;
str_len = ((xp_awk_val_str_t*)a0)->len;
str_free = XP_NULL;
}
else
{
str = xp_awk_valtostr (run, a0, xp_true, XP_NULL, &str_len);
if (str == XP_NULL) return -1;
str_free = str;
}
if (a2 == XP_NULL)
{
/* get the value from FS */
t1 = xp_awk_getglobal (run, XP_AWK_GLOBAL_FS);
if (t1->type == XP_AWK_VAL_NIL)
{
fs_ptr = XP_T(" ");
fs_len = 1;
fs_free = XP_NULL;
}
else if (t1->type == XP_AWK_VAL_STR)
{
fs_ptr = ((xp_awk_val_str_t*)t1)->buf;
fs_len = ((xp_awk_val_str_t*)t1)->len;
fs_free = XP_NULL;
}
else
{
fs_ptr = xp_awk_valtostr (
run, t1, xp_true, XP_NULL, &fs_len);
if (fs_ptr == XP_NULL)
{
if (str_free != XP_NULL)
XP_AWK_FREE (awk, str_free);
return -1;
}
fs_free = fs_ptr;
}
if (fs_len > 1)
{
fs_rex = ((xp_awk_run_t*)run)->rex.fs;
fs_rex_free = XP_NULL;
}
}
else
{
if (a2->type == XP_AWK_VAL_STR)
{
fs_ptr = ((xp_awk_val_str_t*)a2)->buf;
fs_len = ((xp_awk_val_str_t*)a2)->len;
fs_free = XP_NULL;
}
else
{
fs_ptr = xp_awk_valtostr (
run, a2, xp_true, XP_NULL, &fs_len);
if (fs_ptr == XP_NULL)
{
if (str_free != XP_NULL)
XP_AWK_FREE (awk, str_free);
return -1;
}
fs_free = fs_ptr;
}
if (fs_len > 1)
{
fs_rex = xp_awk_buildrex (awk, fs_ptr, fs_len, &errnum);
if (fs_rex == XP_NULL)
{
if (str_free != XP_NULL)
XP_AWK_FREE (awk, str_free);
if (fs_free != XP_NULL)
XP_AWK_FREE (awk, fs_free);
xp_awk_seterrnum (run, errnum);
return -1;
}
fs_rex_free = fs_rex;
}
}
t1 = xp_awk_makemapval (run);
if (t1 == XP_NULL)
{
if (str_free != XP_NULL) XP_AWK_FREE (awk, str_free);
if (fs_free != XP_NULL) XP_AWK_FREE (awk, fs_free);
if (fs_rex_free != XP_NULL) xp_awk_freerex (awk, fs_rex_free);
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
xp_awk_refdownval (run, *a1ref);
*a1ref = t1;
xp_awk_refupval (*a1ref);
p = str; str_left = str_len; num = 0;
while (p != XP_NULL)
{
if (fs_len <= 1)
{
p = xp_awk_strxntok (run,
p, str_len, fs_ptr, fs_len, &tok, &tok_len);
}
else
{
p = xp_awk_strxntokbyrex (run, p, str_len,
fs_rex, &tok, &tok_len, &errnum);
if (p == XP_NULL && errnum != XP_AWK_ENOERR)
{
if (str_free != XP_NULL)
XP_AWK_FREE (awk, str_free);
if (fs_free != XP_NULL)
XP_AWK_FREE (awk, fs_free);
if (fs_rex_free != XP_NULL)
xp_awk_freerex (awk, fs_rex_free);
xp_awk_seterrnum (run, errnum);
return -1;
}
}
if (num == 0 && p == XP_NULL && tok_len == 0)
{
/* no field at all*/
break;
}
xp_assert ((tok != XP_NULL && tok_len > 0) || tok_len == 0);
/* create the field string */
t2 = xp_awk_makestrval (run, tok, tok_len);
if (t2 == XP_NULL)
{
if (str_free != XP_NULL) XP_AWK_FREE (awk, str_free);
if (fs_free != XP_NULL) XP_AWK_FREE (awk, fs_free);
if (fs_rex_free != XP_NULL) xp_awk_freerex (awk, fs_rex_free);
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
/* put it into the map */
key_len = xp_awk_longtostr (
num, 10, XP_NULL, key, xp_countof(key));
xp_assert (key_len != (xp_size_t)-1);
if (xp_awk_map_putx (
((xp_awk_val_map_t*)t1)->map,
key, key_len, t2, XP_NULL) == -1)
{
if (str_free != XP_NULL) XP_AWK_FREE (awk, str_free);
if (fs_free != XP_NULL) XP_AWK_FREE (awk, fs_free);
if (fs_rex_free != XP_NULL) xp_awk_freerex (awk, fs_rex_free);
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
/* don't forget to update the reference count
* when you handle the assignment-like situation
* with the internal data structures */
xp_awk_refupval (t2);
num++;
str_len = str_left - (p - str);
}
if (str_free != XP_NULL) XP_AWK_FREE (awk, str_free);
if (fs_free != XP_NULL) XP_AWK_FREE (awk, fs_free);
if (fs_rex_free != XP_NULL) xp_awk_freerex (awk, fs_rex_free);
t1 = xp_awk_makeintval (run, num);
if (t1 == XP_NULL)
{
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
xp_awk_setretval (run, t1);
return 0;
}
static int __bfn_tolower (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_char_t* str;
xp_size_t len, i;
xp_awk_val_t* a0, * r;
nargs = xp_awk_getnargs (run);
xp_assert (nargs == 1);
a0 = xp_awk_getarg (run, 0);
if (a0->type == XP_AWK_VAL_STR)
{
str = ((xp_awk_val_str_t*)a0)->buf;
len = ((xp_awk_val_str_t*)a0)->len;
}
else
{
str = xp_awk_valtostr (run, a0, xp_true, XP_NULL, &len);
if (str == XP_NULL) return -1;
}
for (i = 0; i < len; i++) str[i] = XP_AWK_TOLOWER (awk, str[i]);
r = xp_awk_makestrval (run, str, len);
if (r == XP_NULL)
{
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str);
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str);
xp_awk_setretval (run, r);
return 0;
}
static int __bfn_toupper (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_char_t* str;
xp_size_t len, i;
xp_awk_val_t* a0, * r;
nargs = xp_awk_getnargs (run);
xp_assert (nargs == 1);
a0 = xp_awk_getarg (run, 0);
if (a0->type == XP_AWK_VAL_STR)
{
str = ((xp_awk_val_str_t*)a0)->buf;
len = ((xp_awk_val_str_t*)a0)->len;
}
else
{
str = xp_awk_valtostr (run, a0, xp_true, XP_NULL, &len);
if (str == XP_NULL) return -1;
}
for (i = 0; i < len; i++) str[i] = XP_AWK_TOUPPER (awk, str[i]);
r = xp_awk_makestrval (run, str, len);
if (r == XP_NULL)
{
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str);
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
if (a0->type != XP_AWK_VAL_STR) XP_AWK_FREE (awk, str);
xp_awk_setretval (run, r);
return 0;
}
static int __bfn_gsub (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_awk_val_t* a0, * a1, * a2;
xp_char_t* a0_ptr, * a1_ptr;
xp_size_t a0_len, a1_len;
xp_char_t* a0_ptr_free = XP_NULL;
xp_char_t* a1_ptr_free = XP_NULL;
nargs = xp_awk_getnargs (run);
xp_assert (nargs >= 2 && nargs <= 3);
a0 = xp_awk_getarg (run, 0);
a1 = xp_awk_getarg (run, 1);
a2 = (nargs >= 3)? xp_awk_getarg (run, 2): XP_NULL;
xp_assert (a2 == XP_NULL || a2->type == XP_AWK_VAL_REF);
if (a0->type == XP_AWK_VAL_STR)
{
a0_ptr = ((xp_awk_val_str_t*)a0)->buf;
a0_len = ((xp_awk_val_str_t*)a0)->len;
}
else
{
a0_ptr = xp_awk_valtostr (run, a0, xp_true, XP_NULL, &a0_len);
if (a0_ptr == XP_NULL) return -1;
a0_ptr_free = a0_ptr;
}
if (a1->type == XP_AWK_VAL_STR)
{
a1_ptr = ((xp_awk_val_str_t*)a1)->buf;
a1_len = ((xp_awk_val_str_t*)a1)->len;
}
else
{
a1_ptr = xp_awk_valtostr (run, a1, xp_true, XP_NULL, &a1_len);
if (a1_ptr == XP_NULL)
{
if (a0_ptr_free != XP_NULL)
XP_AWK_FREE (awk, a0_ptr_free);
return -1;
}
a1_ptr_free = a1_ptr;
}
/* TODO: */
if (a2 == XP_NULL)
{
/* operation is on $0 */
}
else
{
/* operation is on a2 */
}
if (a1_ptr_free != XP_NULL) XP_AWK_FREE (awk, a1_ptr_free);
if (a0_ptr_free != XP_NULL) XP_AWK_FREE (awk, a0_ptr_free);
return 0;
}
static int __bfn_system (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_char_t* cmd;
xp_awk_val_t* v;
int n;
nargs = xp_awk_getnargs (run);
xp_assert (nargs == 1);
cmd = xp_awk_valtostr (
run, xp_awk_getarg(run, 0), xp_true, XP_NULL, XP_NULL);
if (cmd == XP_NULL) return -1;
#ifdef _WIN32
n = _tsystem (cmd);
#else
/* TODO: support system on other platforms that win32 */
n = -1;
#endif
XP_AWK_FREE (awk, cmd);
v = xp_awk_makeintval (run, n);
if (v == XP_NULL)
{
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
xp_awk_setretval (run, v);
return 0;
}
/* math functions */
static int __bfn_sin (xp_awk_t* awk, void* run)
{
xp_size_t nargs;
xp_awk_val_t* v;
int n;
xp_long_t lv;
xp_real_t rv;
nargs = xp_awk_getnargs (run);
xp_assert (nargs == 1);
n = xp_awk_valtonum (run, xp_awk_getarg(run, 0), &lv, &rv);
if (n == -1)
{
/* wrong value */
return -1;
}
if (n == 0) rv = (xp_real_t)lv;
#if (XP_SIZEOF_REAL == XP_SIZEOF_LONG_DOUBLE)
v = xp_awk_makerealval (run, (xp_real_t)sinl(rv));
#elif (XP_SIZEOF_REAL == XP_SIZEOF_DOUBLE)
v = xp_awk_makerealval (run, (xp_real_t)sin(rv));
#else
#error unsupported floating-point data type
#endif
if (v == XP_NULL)
{
xp_awk_seterrnum (run, XP_AWK_ENOMEM);
return -1;
}
xp_awk_setretval (run, v);
return 0;
}
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