1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/****************************************************************
* *
* Copyright (c) 2006-2021 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* 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. *
* *
****************************************************************/
#include "mdef.h"
#include "gtm_string.h"
#include "stringpool.h"
#include "min_max.h"
#include "op.h"
#include "gtm_utf8.h"
GBLREF spdesc stringpool;
GBLREF boolean_t badchar_inhibit;
error_def(ERR_MAXSTRLEN);
/*
* ----------------------------------------------------------
* Set version of $extract
*
* Arguments:
* src - source mval
* expr - expression string mval to be inserted into source
* schar - starting character index to be replaced
* echar - ending character index to be replaced
* dst - destination mval where the result is saved.
*
* Return:
* none
* ----------------------------------------------------------
*/
void op_setextract(mval *src, mval *expr, int schar, int echar, mval *dst)
{
size_t dstlen, padlen;
int pfxlen, sfxoff, sfxlen, skip, bytelen, srclen, char_len;
unsigned char *srcptr, *srcbase, *srctop, *straddr;
padlen = pfxlen = sfxlen = 0;
MV_FORCE_STR(expr); /* Expression to put into piece place */
if (MV_DEFINED(src))
{
MV_FORCE_STR(src); /* Make sure is string prior to length check */
srclen = src->str.len;
} else /* Source is not defined -- treat as a null string */
srclen = 0;
schar = MAX(schar, 1); /* schar starts at 1 at a minimum */
/* There are four cases in the spec:
* 1) schar > echar or echar < 1 -- glvn and naked indicator are not changed. This is
* handled by generated code in m_set
* 2) echar >= schar-1 > $L(src) -- dst = src_$J("",schar-1-$L(src))_expr
* 3) schar-1 <= $L(src) < echar -- dst = $E(src,1,schar-1)_expr
* 4) All others -- dst = $E(src,1,schar-1)_expr_$E(src,echar+1,$L(src))
*/
srcbase = (unsigned char *)src->str.addr;
srctop = srcbase + srclen;
for (srcptr = srcbase, skip = schar - 1; ((0 < skip) && (srcptr < srctop)); --skip)
{ /* Skip the first schar - 1 characters */
if (!UTF8_VALID(srcptr, srctop, bytelen) && !badchar_inhibit)
utf8_badchar(0, srcptr, srctop, 0, NULL);
srcptr += bytelen;
}
pfxlen = INTCAST(srcptr - srcbase);
if (0 < skip)
/* Case #2: schar is past the string length. echar test handled in generated code.
* Should be padded with as many spaces as characters remained to be skipped
*/
padlen = (size_t)skip;
for (skip = echar - schar + 1; (0 < skip) && (srcptr < srctop); --skip)
{ /* skip up to the character position echar */
if (!UTF8_VALID(srcptr, srctop, bytelen) && !badchar_inhibit)
utf8_badchar(0, srcptr, srctop, 0, NULL);
srcptr += bytelen;
}
char_len = 0;
if (0 >= skip)
{ /* Case #4: echar is within the string length, suffix to be added */
sfxoff = INTCAST(srcptr - srcbase);
sfxlen = INTCAST(srctop - srcptr);
if (!badchar_inhibit && (0 <sfxlen))
{ /* Validate the suffix, and we can compute char_len as well */
for (; (srcptr < srctop); ++char_len)
{
if (!UTF8_VALID(srcptr, srctop, bytelen))
utf8_badchar(0, srcptr, srctop, 0, NULL);
srcptr += bytelen;
}
MV_FORCE_LEN(expr);
char_len += schar - 1 + expr->str.char_len;
}
}
/* Calculate total string len */
dstlen = (size_t)pfxlen + padlen + (size_t)expr->str.len + (size_t)sfxlen;
if (MAX_STRLEN < dstlen)
RTS_ERROR_CSA_ABT(NULL, VARLSTCNT(1) ERR_MAXSTRLEN);
ENSURE_STP_FREE_SPACE((int)dstlen);
srcbase = (unsigned char *)src->str.addr;
straddr = stringpool.free;
if (0 < pfxlen)
{ /* Copy prefix */
memcpy(straddr, srcbase, pfxlen);
straddr += pfxlen;
}
if (0 < padlen)
{ /* Insert padding */
memset(straddr, ' ', padlen);
straddr += padlen;
}
if (0 < expr->str.len)
{ /* Copy expression */
memcpy(straddr, expr->str.addr, expr->str.len);
straddr += expr->str.len;
}
if (0 < sfxlen)
{ /* Copy suffix */
memcpy(straddr, srcbase + sfxoff, sfxlen);
straddr += sfxlen;
}
assert(IS_AT_END_OF_STRINGPOOL(straddr, -dstlen));
MV_INIT_STRING(dst, straddr - stringpool.free, (char *)stringpool.free);
if (0 < char_len)
{
dst->mvtype |= MV_UTF_LEN;
dst->str.char_len = char_len;
}
stringpool.free = straddr;
}
|
