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/****************************************************************
* *
* Copyright 2001, 2014 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
/*
* -----------------------------------------------------
* Convert a string subscript to MUMPS string
* -----------------------------------------------------
*/
#include "mdef.h"
#include "gtm_string.h"
#include "gdsroot.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsfhead.h"
#include "copy.h"
#include "collseq.h"
#include "do_xform.h"
#include "gvsub2str.h"
#include "zshow.h"
#define LARGE_EXP 10000
GBLREF gv_namehead *gv_target;
LITREF unsigned short dpos[], dneg[];
error_def(ERR_GVSUBOFLOW);
/*
* -----------------------------------------------------
* Convert a string subscript to MUMPS string
* Save result in a buffer pointed by targ.
*
* Entry:
* sub - input string in subscript format
* targ - output mstr value.
* xlat_flg- translate flag.
* If true convert string to MUMPS format (aka ZWRITE format)
* Return:
* (pointer to the last char.
* converted in the targ string) + 1.
* -----------------------------------------------------
*/
unsigned char *gvsub2str(unsigned char *sub, mstr *opstr, boolean_t xlat_flg)
{
unsigned char buf[MAX_KEY_SZ + 1], buf1[MAX_KEY_SZ + 1], ch, *ptr, trail_ch, *str, *targ, *targ_end;
unsigned short *tbl_ptr;
int num, rev_num, trail_zero;
span_subs *subs_ptr;
int expon, in_length, targ_len;
mstr mstr_ch, mstr_targ;
DCL_THREADGBL_ACCESS;
SETUP_THREADGBL_ACCESS;
ch = *sub++;
targ = (unsigned char *)opstr->addr;
if (STR_SUB_PREFIX == ch || (SUBSCRIPT_STDCOL_NULL == ch && KEY_DELIMITER == *sub))
{ /* If this is a string */
in_length = 0;
ptr = (xlat_flg ? buf : targ);
while ((ch = *sub++))
{ /* Copy string to ptr, xlating each char */
in_length++;
if (STR_SUB_ESCAPE == ch) /* if this is an escape, demote next char */
ch = (*sub++ - 1);
*ptr++ = ch;
}
if (TREF(transform) && gv_target && gv_target->collseq)
{
mstr_ch.len = in_length;
mstr_ch.addr = (char *)(xlat_flg ? buf : targ);
mstr_targ.len = SIZEOF(buf1);
mstr_targ.addr = (char *)buf1;
do_xform(gv_target->collseq, XBACK, &mstr_ch, &mstr_targ, &targ_len);
if (targ_len > opstr->len)
{
/* The only way we know of for targ_len to be greater than opstr->len is if the collation
* library allocated an external buffer greater than opstr->len
*/
assert(mstr_targ.addr != (char *)buf1);
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_GVSUBOFLOW);
}
if (!xlat_flg)
{
memcpy(targ, mstr_targ.addr, targ_len); /* mstr_targ.addr is used just in case it is
* reallocated by the XBACK routine.
*/
targ = targ + targ_len;
} else
{
in_length = targ_len;
ptr = (unsigned char *)mstr_targ.addr; /* mstr_targ.addr is used just in case it is
* reallocated in the XBACK routine.
*/
}
} else if (xlat_flg)
ptr = &buf[0];
else
targ = ptr;
if (xlat_flg)
{
format2zwr((sm_uc_ptr_t)ptr, in_length, targ, &targ_len);
assert(targ_len <= opstr->len);
targ = targ + targ_len;
}
} else
{ /* Number */
targ_end = targ + opstr->len;
assert(opstr->len >= SPAN_PREFIX_LEN);
if (SUBSCRIPT_ZERO == ch)
*targ++ = '0';
else if(SPANGLOB_SUB_ESCAPE == ch)
{
ASGN_SPAN_PREFIX(targ);
targ += SPAN_PREFIX_LEN;
subs_ptr = (span_subs *)(sub - 1);
/* Internal to the database, the spanning node blocks counting starts with 0 i.e. first spanning
* node block has ID '0' but while displaying first block of spanning node is displayed as '1'
* Hence the below adjustment in the 'num'.
*/
num = SPAN_GVSUBS2INT(subs_ptr) + 1;
sub = (sub - 1) + SPAN_SUBS_LEN;
for (trail_zero = 0; (num % DECIMAL_BASE) == 0; trail_zero++, num /= DECIMAL_BASE)
;
for (rev_num = 0; num > 0; rev_num = (rev_num * DECIMAL_BASE + num % DECIMAL_BASE), num /= DECIMAL_BASE)
;
for (; rev_num > 0 && targ < targ_end;
*targ++ = (rev_num % DECIMAL_BASE + ASCII_0), rev_num /= DECIMAL_BASE)
;
for (; trail_zero > 0 && targ < targ_end; *targ++ = '0', trail_zero--);
if (*sub != 0)
*targ++ = '*';
}
else
{
tbl_ptr = (unsigned short *)&dpos[0] - 1;
trail_ch = KEY_DELIMITER;
if (0 <= (signed char)ch && targ < targ_end)
{ /* Bit 7 of the exponent is set for positive numbers; must be negative */
trail_ch = NEG_MNTSSA_END;
tbl_ptr = (unsigned short *)dneg;
ch = ~ch;
*targ++ = '-';
}
ch -= (SUBSCRIPT_BIAS - 1); /* Unbias the exponent */
expon = ch;
if (0 >= (signed char)ch)
{ /* number is a fraction */
ch = -(signed char)ch;
/* Save decimal point */
*targ++ = '.';
/* generate leading 0's */
do *targ++ = '0';
while ((signed char)ch-- > 0 && targ < targ_end)
;
/* make expon. really large to avoid
* generating extra dots */
expon = LARGE_EXP;
}
while ((ch = *sub++) && ch != trail_ch)
{ /* Convert digits loop */
/* adjust dcm. point */
if (0 >= (expon -= 2))
{
if (0 != expon)
{
*targ++ = '.';
expon = LARGE_EXP;
PUT_USHORT(targ, tbl_ptr[ch]);
targ += SIZEOF(short);
} else
{ /* Insert dot between digits */
PUT_USHORT(targ, tbl_ptr[ch]);
targ += SIZEOF(short);
*targ = *(targ - 1);
*(targ - 1) = '.';
targ++;
expon = LARGE_EXP;
}
} else
{
PUT_USHORT(targ, tbl_ptr[ch]);
targ += SIZEOF(short);
}
}
if ((LARGE_EXP - 100) < expon)
{
if ('0' == *(targ - 1))
targ--;
if ('.' == *(targ - 1))
targ--;
} else
while (--expon > 0 && targ < targ_end)
*targ++ = '0';
}
}
return targ;
}
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