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ctype-ucs2.c
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3491 lines (2997 loc) · 84.6 KB
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/* Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; version 2
of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/* UCS2 support. Written by Alexander Barkov <[email protected]> */
#include <my_global.h>
#include <my_sys.h>
#include "m_string.h"
#include "m_ctype.h"
#include <errno.h>
#include <stdarg.h>
#if defined(HAVE_CHARSET_utf16) || defined(HAVE_CHARSET_ucs2)
#define HAVE_CHARSET_mb2
#endif
#if defined(HAVE_CHARSET_mb2) || defined(HAVE_CHARSET_utf32)
#define HAVE_CHARSET_mb2_or_mb4
#endif
#ifndef EILSEQ
#define EILSEQ ENOENT
#endif
#undef ULONGLONG_MAX
#define ULONGLONG_MAX (~(ulonglong) 0)
#define MAX_NEGATIVE_NUMBER ((ulonglong) LL(0x8000000000000000))
#define INIT_CNT 9
#define LFACTOR ULL(1000000000)
#define LFACTOR1 ULL(10000000000)
#define LFACTOR2 ULL(100000000000)
static unsigned long lfactor[9]=
{ 1L, 10L, 100L, 1000L, 10000L, 100000L, 1000000L, 10000000L, 100000000L };
#ifdef HAVE_CHARSET_mb2_or_mb4
static inline int
my_bincmp(const uchar *s, const uchar *se,
const uchar *t, const uchar *te)
{
int slen= (int) (se - s), tlen= (int) (te - t);
int len= MY_MIN(slen, tlen);
int cmp= memcmp(s, t, len);
return cmp ? cmp : slen - tlen;
}
static size_t
my_caseup_str_mb2_or_mb4(const CHARSET_INFO * cs MY_ATTRIBUTE((unused)),
char * s MY_ATTRIBUTE((unused)))
{
DBUG_ASSERT(0);
return 0;
}
static size_t
my_casedn_str_mb2_or_mb4(const CHARSET_INFO *cs MY_ATTRIBUTE((unused)),
char * s MY_ATTRIBUTE((unused)))
{
DBUG_ASSERT(0);
return 0;
}
static int
my_strcasecmp_mb2_or_mb4(const CHARSET_INFO *cs MY_ATTRIBUTE((unused)),
const char *s MY_ATTRIBUTE((unused)),
const char *t MY_ATTRIBUTE((unused)))
{
DBUG_ASSERT(0);
return 0;
}
static long
my_strntol_mb2_or_mb4(const CHARSET_INFO *cs,
const char *nptr, size_t l, int base,
char **endptr, int *err)
{
int negative= 0;
int overflow;
int cnv;
my_wc_t wc;
register unsigned int cutlim;
register uint32 cutoff;
register uint32 res;
register const uchar *s= (const uchar*) nptr;
register const uchar *e= (const uchar*) nptr+l;
const uchar *save;
*err= 0;
do
{
if ((cnv= cs->cset->mb_wc(cs, &wc, s, e))>0)
{
switch (wc)
{
case ' ' : break;
case '\t': break;
case '-' : negative= !negative; break;
case '+' : break;
default : goto bs;
}
}
else /* No more characters or bad multibyte sequence */
{
if (endptr != NULL )
*endptr= (char*) s;
err[0]= (cnv==MY_CS_ILSEQ) ? EILSEQ : EDOM;
return 0;
}
s+= cnv;
} while (1);
bs:
overflow= 0;
res= 0;
save= s;
cutoff= ((uint32)~0L) / (uint32) base;
cutlim= (uint) (((uint32)~0L) % (uint32) base);
do {
if ((cnv= cs->cset->mb_wc(cs, &wc, s, e)) > 0)
{
s+= cnv;
if (wc >= '0' && wc <= '9')
wc-= '0';
else if (wc >= 'A' && wc <= 'Z')
wc= wc - 'A' + 10;
else if (wc >= 'a' && wc <= 'z')
wc= wc - 'a' + 10;
else
break;
if ((int)wc >= base)
break;
if (res > cutoff || (res == cutoff && wc > cutlim))
overflow= 1;
else
{
res*= (uint32) base;
res+= wc;
}
}
else if (cnv == MY_CS_ILSEQ)
{
if (endptr !=NULL )
*endptr = (char*) s;
err[0]= EILSEQ;
return 0;
}
else
{
/* No more characters */
break;
}
} while(1);
if (endptr != NULL)
*endptr = (char *) s;
if (s == save)
{
err[0]= EDOM;
return 0L;
}
if (negative)
{
if (res > (uint32) INT_MIN32)
overflow= 1;
}
else if (res > INT_MAX32)
overflow= 1;
if (overflow)
{
err[0]= ERANGE;
return negative ? INT_MIN32 : INT_MAX32;
}
return (negative ? -((long) res) : (long) res);
}
static ulong
my_strntoul_mb2_or_mb4(const CHARSET_INFO *cs,
const char *nptr, size_t l, int base,
char **endptr, int *err)
{
int negative= 0;
int overflow;
int cnv;
my_wc_t wc;
register unsigned int cutlim;
register uint32 cutoff;
register uint32 res;
register const uchar *s= (const uchar*) nptr;
register const uchar *e= (const uchar*) nptr + l;
const uchar *save;
*err= 0;
do
{
if ((cnv= cs->cset->mb_wc(cs, &wc, s, e)) > 0)
{
switch (wc)
{
case ' ' : break;
case '\t': break;
case '-' : negative= !negative; break;
case '+' : break;
default : goto bs;
}
}
else /* No more characters or bad multibyte sequence */
{
if (endptr !=NULL )
*endptr= (char*)s;
err[0]= (cnv == MY_CS_ILSEQ) ? EILSEQ : EDOM;
return 0;
}
s+= cnv;
} while (1);
bs:
overflow= 0;
res= 0;
save= s;
cutoff= ((uint32)~0L) / (uint32) base;
cutlim= (uint) (((uint32)~0L) % (uint32) base);
do
{
if ((cnv= cs->cset->mb_wc(cs, &wc, s, e)) > 0)
{
s+= cnv;
if (wc >= '0' && wc <= '9')
wc-= '0';
else if (wc >= 'A' && wc <= 'Z')
wc= wc - 'A' + 10;
else if (wc >= 'a' && wc <= 'z')
wc= wc - 'a' + 10;
else
break;
if ((int) wc >= base)
break;
if (res > cutoff || (res == cutoff && wc > cutlim))
overflow = 1;
else
{
res*= (uint32) base;
res+= wc;
}
}
else if (cnv == MY_CS_ILSEQ)
{
if (endptr != NULL )
*endptr= (char*)s;
err[0]= EILSEQ;
return 0;
}
else
{
/* No more characters */
break;
}
} while(1);
if (endptr != NULL)
*endptr= (char *) s;
if (s == save)
{
err[0]= EDOM;
return 0L;
}
if (overflow)
{
err[0]= (ERANGE);
return (~(uint32) 0);
}
return (negative ? -((long) res) : (long) res);
}
static longlong
my_strntoll_mb2_or_mb4(const CHARSET_INFO *cs,
const char *nptr, size_t l, int base,
char **endptr, int *err)
{
int negative=0;
int overflow;
int cnv;
my_wc_t wc;
register ulonglong cutoff;
register unsigned int cutlim;
register ulonglong res;
register const uchar *s= (const uchar*) nptr;
register const uchar *e= (const uchar*) nptr+l;
const uchar *save;
*err= 0;
do
{
if ((cnv=cs->cset->mb_wc(cs,&wc,s,e))>0)
{
switch (wc)
{
case ' ' : break;
case '\t': break;
case '-' : negative= !negative; break;
case '+' : break;
default : goto bs;
}
}
else /* No more characters or bad multibyte sequence */
{
if (endptr !=NULL )
*endptr = (char*)s;
err[0] = (cnv==MY_CS_ILSEQ) ? EILSEQ : EDOM;
return 0;
}
s+=cnv;
} while (1);
bs:
overflow = 0;
res = 0;
save = s;
cutoff = (~(ulonglong) 0) / (unsigned long int) base;
cutlim = (uint) ((~(ulonglong) 0) % (unsigned long int) base);
do {
if ((cnv=cs->cset->mb_wc(cs,&wc,s,e))>0)
{
s+=cnv;
if ( wc>='0' && wc<='9')
wc -= '0';
else if ( wc>='A' && wc<='Z')
wc = wc - 'A' + 10;
else if ( wc>='a' && wc<='z')
wc = wc - 'a' + 10;
else
break;
if ((int)wc >= base)
break;
if (res > cutoff || (res == cutoff && wc > cutlim))
overflow = 1;
else
{
res *= (ulonglong) base;
res += wc;
}
}
else if (cnv==MY_CS_ILSEQ)
{
if (endptr !=NULL )
*endptr = (char*)s;
err[0]=EILSEQ;
return 0;
}
else
{
/* No more characters */
break;
}
} while(1);
if (endptr != NULL)
*endptr = (char *) s;
if (s == save)
{
err[0]=EDOM;
return 0L;
}
if (negative)
{
if (res > (ulonglong) LONGLONG_MIN)
overflow = 1;
}
else if (res > (ulonglong) LONGLONG_MAX)
overflow = 1;
if (overflow)
{
err[0]=ERANGE;
return negative ? LONGLONG_MIN : LONGLONG_MAX;
}
return (negative ? -((longlong)res) : (longlong)res);
}
static ulonglong
my_strntoull_mb2_or_mb4(const CHARSET_INFO *cs,
const char *nptr, size_t l, int base,
char **endptr, int *err)
{
int negative= 0;
int overflow;
int cnv;
my_wc_t wc;
register ulonglong cutoff;
register unsigned int cutlim;
register ulonglong res;
register const uchar *s= (const uchar*) nptr;
register const uchar *e= (const uchar*) nptr + l;
const uchar *save;
*err= 0;
do
{
if ((cnv= cs->cset->mb_wc(cs,&wc,s,e)) > 0)
{
switch (wc)
{
case ' ' : break;
case '\t': break;
case '-' : negative= !negative; break;
case '+' : break;
default : goto bs;
}
}
else /* No more characters or bad multibyte sequence */
{
if (endptr !=NULL )
*endptr = (char*)s;
err[0]= (cnv==MY_CS_ILSEQ) ? EILSEQ : EDOM;
return 0;
}
s+=cnv;
} while (1);
bs:
overflow = 0;
res = 0;
save = s;
cutoff = (~(ulonglong) 0) / (unsigned long int) base;
cutlim = (uint) ((~(ulonglong) 0) % (unsigned long int) base);
do
{
if ((cnv=cs->cset->mb_wc(cs,&wc,s,e))>0)
{
s+=cnv;
if ( wc>='0' && wc<='9')
wc -= '0';
else if ( wc>='A' && wc<='Z')
wc = wc - 'A' + 10;
else if ( wc>='a' && wc<='z')
wc = wc - 'a' + 10;
else
break;
if ((int)wc >= base)
break;
if (res > cutoff || (res == cutoff && wc > cutlim))
overflow = 1;
else
{
res *= (ulonglong) base;
res += wc;
}
}
else if (cnv==MY_CS_ILSEQ)
{
if (endptr !=NULL )
*endptr = (char*)s;
err[0]= EILSEQ;
return 0;
}
else
{
/* No more characters */
break;
}
} while(1);
if (endptr != NULL)
*endptr = (char *) s;
if (s == save)
{
err[0]= EDOM;
return 0L;
}
if (overflow)
{
err[0]= ERANGE;
return (~(ulonglong) 0);
}
return (negative ? -((longlong) res) : (longlong) res);
}
static double
my_strntod_mb2_or_mb4(const CHARSET_INFO *cs,
char *nptr, size_t length,
char **endptr, int *err)
{
char buf[256];
double res;
register char *b= buf;
register const uchar *s= (const uchar*) nptr;
const uchar *end;
my_wc_t wc;
int cnv;
*err= 0;
/* Cut too long strings */
if (length >= sizeof(buf))
length= sizeof(buf) - 1;
end= s + length;
while ((cnv= cs->cset->mb_wc(cs,&wc,s,end)) > 0)
{
s+= cnv;
if (wc > (int) (uchar) 'e' || !wc)
break; /* Can't be part of double */
*b++= (char) wc;
}
*endptr= b;
res= my_strtod(buf, endptr, err);
*endptr= nptr + cs->mbminlen * (size_t) (*endptr - buf);
return res;
}
static ulonglong
my_strntoull10rnd_mb2_or_mb4(const CHARSET_INFO *cs,
const char *nptr, size_t length,
int unsign_fl,
char **endptr, int *err)
{
char buf[256], *b= buf;
ulonglong res;
const uchar *end, *s= (const uchar*) nptr;
my_wc_t wc;
int cnv;
/* Cut too long strings */
if (length >= sizeof(buf))
length= sizeof(buf)-1;
end= s + length;
while ((cnv= cs->cset->mb_wc(cs,&wc,s,end)) > 0)
{
s+= cnv;
if (wc > (int) (uchar) 'e' || !wc)
break; /* Can't be a number part */
*b++= (char) wc;
}
res= my_strntoull10rnd_8bit(cs, buf, b - buf, unsign_fl, endptr, err);
*endptr= (char*) nptr + cs->mbminlen * (size_t) (*endptr - buf);
return res;
}
/*
This is a fast version optimized for the case of radix 10 / -10
*/
static size_t
my_l10tostr_mb2_or_mb4(const CHARSET_INFO *cs,
char *dst, size_t len, int radix, long int val)
{
char buffer[66];
register char *p, *db, *de;
long int new_val;
int sl= 0;
unsigned long int uval = (unsigned long int) val;
p= &buffer[sizeof(buffer) - 1];
*p= '\0';
if (radix < 0)
{
if (val < 0)
{
sl= 1;
/* Avoid integer overflow in (-val) for LONGLONG_MIN (BUG#31799). */
uval = (unsigned long int)0 - uval;
}
}
new_val = (long) (uval / 10);
*--p = '0'+ (char) (uval - (unsigned long) new_val * 10);
val= new_val;
while (val != 0)
{
new_val= val / 10;
*--p= '0' + (char) (val - new_val * 10);
val= new_val;
}
if (sl)
{
*--p= '-';
}
for ( db= dst, de= dst + len ; (dst < de) && *p ; p++)
{
int cnvres= cs->cset->wc_mb(cs,(my_wc_t)p[0],(uchar*) dst, (uchar*) de);
if (cnvres > 0)
dst+= cnvres;
else
break;
}
return (int) (dst - db);
}
static size_t
my_ll10tostr_mb2_or_mb4(const CHARSET_INFO *cs,
char *dst, size_t len, int radix, longlong val)
{
char buffer[65];
register char *p, *db, *de;
long long_val;
int sl= 0;
ulonglong uval= (ulonglong) val;
if (radix < 0)
{
if (val < 0)
{
sl= 1;
/* Avoid integer overflow in (-val) for LONGLONG_MIN (BUG#31799). */
uval = (ulonglong)0 - uval;
}
}
p= &buffer[sizeof(buffer)-1];
*p='\0';
if (uval == 0)
{
*--p= '0';
goto cnv;
}
while (uval > (ulonglong) LONG_MAX)
{
ulonglong quo= uval/(uint) 10;
uint rem= (uint) (uval- quo* (uint) 10);
*--p= '0' + rem;
uval= quo;
}
long_val= (long) uval;
while (long_val != 0)
{
long quo= long_val/10;
*--p= (char) ('0' + (long_val - quo*10));
long_val= quo;
}
cnv:
if (sl)
{
*--p= '-';
}
for ( db= dst, de= dst + len ; (dst < de) && *p ; p++)
{
int cnvres= cs->cset->wc_mb(cs, (my_wc_t) p[0], (uchar*) dst, (uchar*) de);
if (cnvres > 0)
dst+= cnvres;
else
break;
}
return (int) (dst -db);
}
#endif /* HAVE_CHARSET_mb2_or_mb4 */
#ifdef HAVE_CHARSET_mb2
static longlong
my_strtoll10_mb2(const CHARSET_INFO *cs,
const char *nptr, char **endptr, int *error)
{
const char *s, *end, *start, *n_end, *true_end;
uchar c;
unsigned long i, j, k;
ulonglong li;
int negative;
ulong cutoff, cutoff2, cutoff3;
my_wc_t wc;
int res;
s= nptr;
/* If fixed length string */
if (endptr)
{
/*
Make sure string length is even.
Odd length indicates a bug in the caller.
Assert in debug, round in production.
*/
DBUG_ASSERT((*endptr - s) % 2 == 0);
end= s + ((*endptr - s) / 2) * 2;
for ( ; ; ) /* Skip leading spaces and tabs */
{
res= cs->cset->mb_wc(cs, &wc, (const uchar *) s, (const uchar *) end);
if (res <= 0)
goto no_conv;
s+= res;
if (wc != ' ' && wc != '\t')
break;
}
}
else
{
/* We don't support null terminated strings in UCS2 */
goto no_conv;
}
/* Check for a sign. */
negative= 0;
if (wc == '-')
{
*error= -1; /* Mark as negative number */
negative= 1;
res= cs->cset->mb_wc(cs, &wc, (const uchar *) s, (const uchar *) end);
if (res < 0)
goto no_conv;
s+= res;
cutoff= MAX_NEGATIVE_NUMBER / LFACTOR2;
cutoff2= (MAX_NEGATIVE_NUMBER % LFACTOR2) / 100;
cutoff3= MAX_NEGATIVE_NUMBER % 100;
}
else
{
*error= 0;
if (wc == '+')
{
res= cs->cset->mb_wc(cs, &wc, (const uchar *) s, (const uchar *) end);
if (res < 0)
goto no_conv;
s+= res;
}
cutoff= ULONGLONG_MAX / LFACTOR2;
cutoff2= ULONGLONG_MAX % LFACTOR2 / 100;
cutoff3= ULONGLONG_MAX % 100;
}
/* Handle case where we have a lot of pre-zero */
if (wc == '0')
{
i= 0;
for ( ; ; s+= res)
{
if (s == end)
goto end_i; /* Return 0 */
res= cs->cset->mb_wc(cs, &wc, (const uchar *) s, (const uchar *) end);
if (res < 0)
goto no_conv;
if (wc != '0')
break;
}
while (wc == '0');
n_end= s + 2 * INIT_CNT;
}
else
{
/* Read first digit to check that it's a valid number */
if ((c= (wc - '0')) > 9)
goto no_conv;
i= c;
n_end= s + 2 * (INIT_CNT-1);
}
/* Handle first 9 digits and store them in i */
if (n_end > end)
n_end= end;
for ( ; ; )
{
res= cs->cset->mb_wc(cs, &wc, (const uchar *) s, (const uchar *) n_end);
if (res < 0)
break;
s+= res;
if ((c= (wc - '0')) > 9)
goto end_i;
i= i*10+c;
}
if (s == end)
goto end_i;
/* Handle next 9 digits and store them in j */
j= 0;
start= s; /* Used to know how much to shift i */
n_end= true_end= s + 2 * INIT_CNT;
if (n_end > end)
n_end= end;
do
{
res= cs->cset->mb_wc(cs, &wc, (const uchar *) s, (const uchar *) end);
if (res < 0)
goto no_conv;
s+= res;
if ((c= (wc - '0')) > 9)
goto end_i_and_j;
j= j*10+c;
} while (s != n_end);
if (s == end)
{
if (s != true_end)
goto end_i_and_j;
goto end3;
}
res= cs->cset->mb_wc(cs, &wc, (const uchar *) s, (const uchar *) end);
if (res < 0)
goto no_conv;
s+= res;
if ((c= (wc - '0')) > 9)
goto end3;
/* Handle the next 1 or 2 digits and store them in k */
k=c;
if (s == end)
goto end4;
res= cs->cset->mb_wc(cs, &wc, (const uchar *) s, (const uchar *) end);
if (res < 0)
goto no_conv;
s+= res;
if ((c= (wc - '0')) > 9)
goto end4;
k= k*10+c;
*endptr= (char*) s;
/* number string should have ended here */
if (s != end && (c= (wc - '0')) <= 9)
goto overflow;
/* Check that we didn't get an overflow with the last digit */
if (i > cutoff || (i == cutoff && ((j > cutoff2 || j == cutoff2) &&
k > cutoff3)))
goto overflow;
li=i*LFACTOR2+ (ulonglong) j*100 + k;
return (longlong) li;
overflow: /* *endptr is set here */
*error= MY_ERRNO_ERANGE;
return negative ? LONGLONG_MIN : (longlong) ULONGLONG_MAX;
end_i:
*endptr= (char*) s;
return (negative ? ((longlong) -(long) i) : (longlong) i);
end_i_and_j:
li= (ulonglong) i * lfactor[(size_t) (s-start) / 2] + j;
*endptr= (char*) s;
return (negative ? -((longlong) li) : (longlong) li);
end3:
li=(ulonglong) i*LFACTOR+ (ulonglong) j;
*endptr= (char*) s;
return (negative ? -((longlong) li) : (longlong) li);
end4:
li=(ulonglong) i*LFACTOR1+ (ulonglong) j * 10 + k;
*endptr= (char*) s;
if (negative)
{
if (li > MAX_NEGATIVE_NUMBER)
goto overflow;
return -((longlong) li);
}
return (longlong) li;
no_conv:
/* There was no number to convert. */
*error= MY_ERRNO_EDOM;
*endptr= (char *) nptr;
return 0;
}
static size_t
my_scan_mb2(const CHARSET_INFO *cs,
const char *str, const char *end, int sequence_type)
{
const char *str0= str;
my_wc_t wc;
int res;
switch (sequence_type)
{
case MY_SEQ_SPACES:
for (res= cs->cset->mb_wc(cs, &wc,
(const uchar *) str, (const uchar *) end);
res > 0 && wc == ' ';
str+= res,
res= cs->cset->mb_wc(cs, &wc,
(const uchar *) str, (const uchar *) end))
{
}
return (size_t) (str - str0);
default:
return 0;
}
}
static void
my_fill_mb2(const CHARSET_INFO *cs, char *s, size_t slen, int fill)
{
char buf[10];
int buflen;
DBUG_ASSERT((slen % 2) == 0);
buflen= cs->cset->wc_mb(cs, (my_wc_t) fill, (uchar*) buf,
(uchar*) buf + sizeof(buf));
DBUG_ASSERT(buflen > 0);
while (slen >= (size_t) buflen)
{
/* Enough space for the characer */
memcpy(s, buf, (size_t) buflen);
s+= buflen;
slen-= buflen;
}
/*
If there are some more space which is not enough
for the whole multibyte character, then add trailing zeros.
*/
for ( ; slen; slen--)
{
*s++= 0x00;
}
}
static int
my_vsnprintf_mb2(char *dst, size_t n, const char* fmt, va_list ap)
{
char *start=dst, *end= dst + n - 1;
for (; *fmt ; fmt++)
{
if (fmt[0] != '%')
{
if (dst == end) /* End of buffer */
break;
*dst++='\0';
*dst++= *fmt; /* Copy ordinary char */
continue;
}
fmt++;
/* Skip if max size is used (to be compatible with printf) */
while ( (*fmt >= '0' && *fmt <= '9') || *fmt == '.' || *fmt == '-')
fmt++;
if (*fmt == 'l')
fmt++;
if (*fmt == 's') /* String parameter */
{
char *par= va_arg(ap, char *);
size_t plen;
size_t left_len= (size_t)(end-dst);