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More coverage testing. (CVS 1754)

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FossilOrigin-Name: 332921041040b343b6b568685ff55d21a624f502
This commit is contained in:
danielk1977
2004-06-28 13:09:11 +00:00
parent 2ec81649a5
commit f46188911d
11 changed files with 329 additions and 91 deletions
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82
src/utf.c
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@@ -12,7 +12,7 @@
** This file contains routines used to translate between UTF-8,
** UTF-16, UTF-16BE, and UTF-16LE.
**
** $Id: utf.c,v 1.25 2004/06/23 13:46:32 danielk1977 Exp $
** $Id: utf.c,v 1.26 2004/06/28 13:09:11 danielk1977 Exp $
**
** Notes on UTF-8:
**
@@ -210,6 +210,38 @@ static const int xtra_utf8_bits[4] = {
} \
}
#define SKIP_UTF16BE(zIn){ \
if( *zIn>=0xD8 && (*zIn<0xE0 || (*zIn==0xE0 && *(zIn+1)==0x00)) ){ \
zIn += 4; \
}else{ \
zIn += 2; \
} \
}
#define SKIP_UTF16LE(zIn){ \
zIn++; \
if( *zIn>=0xD8 && (*zIn<0xE0 || (*zIn==0xE0 && *(zIn-1)==0x00)) ){ \
zIn += 3; \
}else{ \
zIn += 1; \
} \
}
#define RSKIP_UTF16LE(zIn){ \
if( *zIn>=0xD8 && (*zIn<0xE0 || (*zIn==0xE0 && *(zIn-1)==0x00)) ){ \
zIn -= 4; \
}else{ \
zIn -= 2; \
} \
}
#define RSKIP_UTF16BE(zIn){ \
zIn--; \
if( *zIn>=0xD8 && (*zIn<0xE0 || (*zIn==0xE0 && *(zIn+1)==0x00)) ){ \
zIn -= 3; \
}else{ \
zIn -= 1; \
} \
}
/*
** If the TRANSLATE_TRACE macro is defined, the value of each Mem is
** printed on stderr on the way into and out of sqlite3VdbeMemTranslate().
@@ -507,6 +539,54 @@ int sqlite3utf8LikeCompare(
return *zString==0;
}
/*
** UTF-16 implementation of the substr()
*/
void sqlite3utf16Substr(
sqlite3_context *context,
int argc,
sqlite3_value **argv
){
int y, z;
unsigned char const *zStr;
unsigned char const *zStrEnd;
unsigned char const *zStart;
unsigned char const *zEnd;
int i;
zStr = (unsigned char const *)sqlite3_value_text16(argv[0]);
zStrEnd = &zStr[sqlite3_value_bytes16(argv[0])];
y = sqlite3_value_int(argv[1]);
z = sqlite3_value_int(argv[2]);
if( y>0 ){
y = y-1;
zStart = zStr;
if( SQLITE_UTF16BE==SQLITE_UTF16NATIVE ){
for(i=0; i<y && zStart<zStrEnd; i++) SKIP_UTF16BE(zStart);
}else{
for(i=0; i<y && zStart<zStrEnd; i++) SKIP_UTF16LE(zStart);
}
}else{
zStart = zStrEnd;
if( SQLITE_UTF16BE==SQLITE_UTF16NATIVE ){
for(i=y; i<0 && zStart>zStr; i++) RSKIP_UTF16BE(zStart);
}else{
for(i=y; i<0 && zStart>zStr; i++) RSKIP_UTF16LE(zStart);
}
for(; i<0; i++) z -= 1;
}
zEnd = zStart;
if( SQLITE_UTF16BE==SQLITE_UTF16NATIVE ){
for(i=0; i<z && zEnd<zStrEnd; i++) SKIP_UTF16BE(zEnd);
}else{
for(i=0; i<z && zEnd<zStrEnd; i++) SKIP_UTF16LE(zEnd);
}
sqlite3_result_text16(context, zStart, zEnd-zStart, SQLITE_TRANSIENT);
}
#if defined(SQLITE_TEST)
/*
** This routine is called from the TCL test function "translate_selftest".