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tidy_os4.lha
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tmbstr.c
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C/C++ Source or Header
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2004-07-25
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/* tmbstr.c -- Tidy string utility functions
(c) 1998-2004 (W3C) MIT, ERCIM, Keio University
See tidy.h for the copyright notice.
CVS Info :
$Author: hoehrmann $
$Date: 2004/03/13 23:29:22 $
$Revision: 1.9 $
*/
#include "tmbstr.h"
#include "lexer.h"
/* like strdup but using MemAlloc */
tmbstr tmbstrdup( ctmbstr str )
{
tmbstr s = NULL;
if ( str )
{
uint len = tmbstrlen( str );
tmbstr cp = s = (tmbstr) MemAlloc( 1+len );
while ( 0 != (*cp++ = *str++) )
/**/;
}
return s;
}
/* like strndup but using MemAlloc */
tmbstr tmbstrndup( ctmbstr str, uint len )
{
tmbstr s = NULL;
if ( str && len > 0 )
{
tmbstr cp = s = (tmbstr) MemAlloc( 1+len );
while ( len-- > 0 && (*cp++ = *str++) )
/**/;
*cp = 0;
}
return s;
}
/* exactly same as strncpy */
uint tmbstrncpy( tmbstr s1, ctmbstr s2, uint size )
{
if ( s1 != NULL && s2 != NULL )
{
tmbstr cp = s1;
while ( *s2 && --size ) /* Predecrement: reserve byte */
*cp++ = *s2++; /* for NULL terminator. */
*cp = 0;
}
return size;
}
/* Allows expressions like: cp += tmbstrcpy( cp, "joebob" );
*/
uint tmbstrcpy( tmbstr s1, ctmbstr s2 )
{
uint ncpy = 0;
while (0 != (*s1++ = *s2++) )
++ncpy;
return ncpy;
}
/* Allows expressions like: cp += tmbstrcat( cp, "joebob" );
*/
uint tmbstrcat( tmbstr s1, ctmbstr s2 )
{
uint ncpy = 0;
while ( *s1 )
++s1;
while (0 != (*s1++ = *s2++) )
++ncpy;
return ncpy;
}
/* exactly same as strcmp */
int tmbstrcmp( ctmbstr s1, ctmbstr s2 )
{
int c;
while ((c = *s1) == *s2)
{
if (c == '\0')
return 0;
++s1;
++s2;
}
return (*s1 > *s2 ? 1 : -1);
}
/* returns byte count, not char count */
uint tmbstrlen( ctmbstr str )
{
uint len = 0;
if ( str )
{
while ( *str++ )
++len;
}
return len;
}
/*
MS C 4.2 doesn't include strcasecmp.
Note that tolower and toupper won't
work on chars > 127.
Neither does ToLower()!
*/
int tmbstrcasecmp( ctmbstr s1, ctmbstr s2 )
{
uint c;
while (c = (uint)(*s1), ToLower(c) == ToLower((uint)(*s2)))
{
if (c == '\0')
return 0;
++s1;
++s2;
}
return (*s1 > *s2 ? 1 : -1);
}
int tmbstrncmp( ctmbstr s1, ctmbstr s2, uint n )
{
uint c;
while ((c = (byte)*s1) == (byte)*s2)
{
if (c == '\0')
return 0;
if (n == 0)
return 0;
++s1;
++s2;
--n;
}
if (n == 0)
return 0;
return (*s1 > *s2 ? 1 : -1);
}
int tmbstrncasecmp( ctmbstr s1, ctmbstr s2, uint n )
{
uint c;
while ( (c = tolower(*s1)) == (uint) tolower(*s2) )
{
if (c == '\0')
return 0;
if (n == 0)
return 0;
++s1;
++s2;
--n;
}
if (n == 0)
return 0;
return (*s1 > *s2 ? 1 : -1);
}
/* return offset of cc from beginning of s1,
** -1 if not found.
*/
int tmbstrnchr( ctmbstr s1, uint maxlen, tmbchar cc )
{
int i;
ctmbstr cp = s1;
for ( i = 0; (uint)i < maxlen; ++i, ++cp )
{
if ( *cp == cc )
return i;
}
return -1;
}
ctmbstr tmbsubstrn( ctmbstr s1, uint len1, ctmbstr s2 )
{
uint len2 = tmbstrlen(s2);
int ix, diff = len1 - len2;
for ( ix = 0; ix <= diff; ++ix )
{
if ( tmbstrncmp(s1+ix, s2, len2) == 0 )
return (ctmbstr) s1+ix;
}
return NULL;
}
ctmbstr tmbsubstrncase( ctmbstr s1, uint len1, ctmbstr s2 )
{
uint len2 = tmbstrlen(s2);
int ix, diff = len1 - len2;
for ( ix = 0; ix <= diff; ++ix )
{
if ( tmbstrncasecmp(s1+ix, s2, len2) == 0 )
return (ctmbstr) s1+ix;
}
return NULL;
}
ctmbstr tmbsubstr( ctmbstr s1, ctmbstr s2 )
{
uint len1 = tmbstrlen(s1), len2 = tmbstrlen(s2);
int ix, diff = len1 - len2;
for ( ix = 0; ix <= diff; ++ix )
{
if ( tmbstrncasecmp(s1+ix, s2, len2) == 0 )
return (ctmbstr) s1+ix;
}
return NULL;
}
/* Transform ASCII chars in string to lower case */
tmbstr tmbstrtolower( tmbstr s )
{
tmbstr cp;
for ( cp=s; *cp; ++cp )
*cp = (tmbchar) ToLower( *cp );
return s;
}
/* Transform ASCII chars in string to upper case */
tmbstr tmbstrtoupper(tmbstr s)
{
tmbstr cp;
for (cp = s; *cp; ++cp)
*cp = (tmbchar)ToUpper(*cp);
return s;
}
Bool tmbsamefile( ctmbstr filename1, ctmbstr filename2 )
{
#if FILENAMES_CASE_SENSITIVE
return ( tmbstrcmp( filename1, filename2 ) == 0 );
#else
return ( tmbstrcasecmp( filename1, filename2 ) == 0 );
#endif
}
int tmbvsnprintf(tmbstr buffer, size_t count, ctmbstr format, va_list args)
{
int retval;
#if HAS_VSNPRINTF
retval = vsnprintf(buffer, count - 1, format, args);
/* todo: conditionally null-terminate the string? */
buffer[count - 1] = 0;
#else
retval = vsprintf(buffer, format, args);
#endif /* HAS_VSNPRINTF */
return retval;
}
int tmbsnprintf(tmbstr buffer, size_t count, ctmbstr format, ...)
{
int retval;
va_list args;
va_start(args, format);
#if HAS_VSNPRINTF
retval = vsnprintf(buffer, count - 1, format, args);
/* todo: conditionally null-terminate the string? */
buffer[count - 1] = 0;
#else
retval = vsprintf(buffer, format, args);
#endif /* HAS_VSNPRINTF */
va_end(args);
return retval;
}