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Overview
| Comment: | In the printf() library, measure width and precision in characters rather than bytes if the "!" (alternate-form-2) flag is present on a %s or %z substitution. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | printf-enhancement |
| Files: | files | file ages | folders |
| SHA3-256: |
ca31c6630422fca70e626dd38aae9629 |
| User & Date: | drh 2018-02-19 17:03:23 |
Context
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2018-02-19
| ||
| 18:03 | Make the alternate-form-2 flag ("!") change the meaning of width and precision from bytes to characters for the %q, %Q, and %w extensions of printf(). (check-in: 391540ac user: drh tags: printf-enhancement) | |
| 17:03 | In the printf() library, measure width and precision in characters rather than bytes if the "!" (alternate-form-2) flag is present on a %s or %z substitution. (check-in: ca31c663 user: drh tags: printf-enhancement) | |
| 16:34 | Only try to use the geteuid() interface on unix if HAVE_FCHOWN is defined. This fixes the build for vxWorks, we are told. (check-in: 38f654dc user: drh tags: trunk) | |
Changes
Changes to src/printf.c.
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}
if( bufpt==0 ){
bufpt = "";
}else if( xtype==etDYNSTRING ){
zExtra = bufpt;
}
if( precision>=0 ){
for(length=0; length<precision && bufpt[length]; length++){}
}else{
length = 0x7fffffff & (int)strlen(bufpt);
}
break;
case etSQLESCAPE: /* Escape ' characters */
case etSQLESCAPE2: /* Escape ' and enclose in '...' */
case etSQLESCAPE3: { /* Escape " characters */
int i, j, k, n, isnull;
int needQuote;
char ch;
................................................................................
for(i=0; i<k; i++){
bufpt[j++] = ch = escarg[i];
if( ch==q ) bufpt[j++] = ch;
}
if( needQuote ) bufpt[j++] = q;
bufpt[j] = 0;
length = j;
/* The precision in %q and %Q means how many input characters to
** consume, not the length of the output...
** if( precision>=0 && precision<length ) length = precision; */
break;
}
case etTOKEN: {
Token *pToken;
if( (pAccum->printfFlags & SQLITE_PRINTF_INTERNAL)==0 ) return;
................................................................................
assert( xtype==etINVALID );
return;
}
}/* End switch over the format type */
/*
** The text of the conversion is pointed to by "bufpt" and is
** "length" characters long. The field width is "width". Do
** the output.
*/
width -= length;
if( width>0 ){
if( !flag_leftjustify ) sqlite3AppendChar(pAccum, width, ' ');
sqlite3StrAccumAppend(pAccum, bufpt, length);
if( flag_leftjustify ) sqlite3AppendChar(pAccum, width, ' ');
}else{
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}
if( bufpt==0 ){
bufpt = "";
}else if( xtype==etDYNSTRING ){
zExtra = bufpt;
}
if( precision>=0 ){
if( flag_altform2 ){
/* Set length to the number of bytes needed in order to display
** precision characters */
unsigned char *z = (unsigned char*)bufpt;
while( precision-- > 0 && z[0] ){
SQLITE_SKIP_UTF8(z);
}
length = (int)(z - (unsigned char*)bufpt);
}else{
for(length=0; length<precision && bufpt[length]; length++){}
}
}else{
length = 0x7fffffff & (int)strlen(bufpt);
}
if( flag_altform2 && width>0 ){
/* Adjust width to account for extra bytes in UTF-8 characters */
int ii = length - 1;
while( ii>=0 ) if( (bufpt[ii--] & 0xc0)==0x80 ) width++;
}
break;
case etSQLESCAPE: /* Escape ' characters */
case etSQLESCAPE2: /* Escape ' and enclose in '...' */
case etSQLESCAPE3: { /* Escape " characters */
int i, j, k, n, isnull;
int needQuote;
char ch;
................................................................................
for(i=0; i<k; i++){
bufpt[j++] = ch = escarg[i];
if( ch==q ) bufpt[j++] = ch;
}
if( needQuote ) bufpt[j++] = q;
bufpt[j] = 0;
length = j;
/* The precision in %q and %Q means how many input bytes to
** consume, not the length of the output...
** if( precision>=0 && precision<length ) length = precision; */
break;
}
case etTOKEN: {
Token *pToken;
if( (pAccum->printfFlags & SQLITE_PRINTF_INTERNAL)==0 ) return;
................................................................................
assert( xtype==etINVALID );
return;
}
}/* End switch over the format type */
/*
** The text of the conversion is pointed to by "bufpt" and is
** "length" characters long. The field width is "width". Do
** the output. Both length and width are in bytes, not characters,
** at this point. If the "!" flag was present on string conversions
** indicating that width and precision should be expressed in characters,
** then the values have been translated prior to reaching this point.
*/
width -= length;
if( width>0 ){
if( !flag_leftjustify ) sqlite3AppendChar(pAccum, width, ' ');
sqlite3StrAccumAppend(pAccum, bufpt, length);
if( flag_leftjustify ) sqlite3AppendChar(pAccum, width, ' ');
}else{
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