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/*
Crown Copyright (c) 1997
This TenDRA(r) Computer Program is subject to Copyright
owned by the United Kingdom Secretary of State for Defence
acting through the Defence Evaluation and Research Agency
(DERA). It is made available to Recipients with a
royalty-free licence for its use, reproduction, transfer
to other parties and amendment for any purpose not excluding
product development provided that any such use et cetera
shall be deemed to be acceptance of the following conditions:-
(1) Its Recipients shall ensure that this Notice is
reproduced upon any copies or amended versions of it;
(2) Any amended version of it shall be clearly marked to
show both the nature of and the organisation responsible
for the relevant amendment or amendments;
(3) Its onward transfer from a recipient to another
party shall be deemed to be that party's acceptance of
these conditions;
(4) DERA gives no warranty or assurance as to its
quality or suitability for any purpose and DERA accepts
no liability whatsoever in relation to any use to which
it may be put.
*/
/**** cstring.c --- C string manipulation.
*
** Author: Steve Folkes <smf@hermes.mod.uk>
*
**** Commentary:
*
* This file implements the C string manipulation facility specified in the
* file "cstring.h". See that file for more details.
*
**** Change Log:
* $Log: cstring.c,v $
* Revision 1.3 1998/03/17 11:38:15 release
* Missing ';'.
*
* Revision 1.2 1998/03/16 11:26:34 release
* Modifications prior to version 4.1.2.
*
* Revision 1.1.1.1 1998/01/17 15:57:45 release
* First version to be checked into rolling release.
*
* Revision 1.2 1994/12/12 11:45:24 smf
* Performing changes for 'CR94_178.sid+tld-update' - bringing in line with
* OSSG C Coding Standards.
*
* Revision 1.1.1.1 1994/07/25 16:06:09 smf
* Initial import of os-interface shared files.
*
**/
/****************************************************************************/
#include "cstring.h"
#include "syntax.h"
/*--------------------------------------------------------------------------*/
CStringP
cstring_duplicate PROTO_N ((cstring))
PROTO_T (CStringP cstring)
{
unsigned length = cstring_length (cstring);
CStringP tmp = ALLOCATE_VECTOR (char, length + 1);
(void) strcpy (tmp, cstring);
return (tmp);
}
CStringP
cstring_duplicate_prefix PROTO_N ((cstring, prefix))
PROTO_T (CStringP cstring X
unsigned prefix)
{
unsigned length = cstring_length (cstring);
if (length <= prefix) {
CStringP tmp = ALLOCATE_VECTOR (char, length + 1);
(void) strcpy (tmp, cstring);
return (tmp);
} else {
CStringP tmp = ALLOCATE_VECTOR (char, prefix + 1);
(void) memcpy ((GenericP) tmp, (GenericP) cstring, (SizeT) prefix);
tmp [prefix] = '\0';
return (tmp);
}
}
unsigned
cstring_hash_value PROTO_N ((cstring))
PROTO_T (CStringP cstring)
{
unsigned value = 0;
while (*cstring) {
value += ((unsigned) (*cstring ++));
}
return (value);
}
#ifdef FS_FAST
#undef cstring_length
#endif /* defined (FS_FAST) */
unsigned
cstring_length PROTO_N ((cstring))
PROTO_T (CStringP cstring)
{
return ((unsigned) strlen (cstring));
}
#ifdef FS_FAST
#define cstring_length(s) ((unsigned) strlen (s))
#endif /* defined (FS_FAST) */
#ifdef FS_FAST
#undef cstring_equal
#endif /* defined (FS_FAST) */
BoolT
cstring_equal PROTO_N ((cstring1, cstring2))
PROTO_T (CStringP cstring1 X
CStringP cstring2)
{
return (strcmp (cstring1, cstring2) == 0);
}
#ifdef FS_FAST
#define cstring_equal(s1, s2) (strcmp ((s1), (s2)) == 0)
#endif /* defined (FS_FAST) */
BoolT
cstring_ci_equal PROTO_N ((cstring1, cstring2))
PROTO_T (CStringP cstring1 X
CStringP cstring2)
{
char c1;
char c2;
do {
c1 = syntax_upcase (*cstring1 ++);
c2 = syntax_upcase (*cstring2 ++);
} while ((c1) && (c2) && (c1 == c2));
return (c1 == c2);
}
BoolT
cstring_to_unsigned PROTO_N ((cstring, num_ref))
PROTO_T (CStringP cstring X
unsigned *num_ref)
{
unsigned number = 0;
if (*cstring == '\0') {
return (FALSE);
}
do {
int value = syntax_value (*cstring);
if ((value == SYNTAX_NO_VALUE) || (value >= 10) ||
(((UINT_MAX - (unsigned) value) / (unsigned) 10) < number)) {
return (FALSE);
}
number *= (unsigned) 10;
number += (unsigned) value;
} while (*++ cstring);
*num_ref = number;
return (TRUE);
}
BoolT
cstring_starts PROTO_N ((cstring, s))
PROTO_T (CStringP cstring X
CStringP s)
{
return (strncmp (cstring, s, strlen (s)) == 0);
}
#ifdef FS_FAST
#undef cstring_contains
#endif /* defined (FS_FAST) */
BoolT
cstring_contains PROTO_N ((cstring, c))
PROTO_T (CStringP cstring X
char c)
{
return (strchr (cstring, c) != NIL (CStringP));
}
#ifdef FS_FAST
#define cstring_contains(s, c) (strchr ((s), (c)) != NIL (CStringP))
#endif /* defined (FS_FAST) */
#ifdef FS_FAST
#undef cstring_find
#endif /* defined (FS_FAST) */
CStringP
cstring_find PROTO_N ((cstring, c))
PROTO_T (CStringP cstring X
char c)
{
return (strchr (cstring, c));
}
#ifdef FS_FAST
#define cstring_find(s, c) (strchr ((s), (c)))
#endif /* defined (FS_FAST) */
#ifdef FS_FAST
#undef cstring_find_reverse
#endif /* defined (FS_FAST) */
CStringP
cstring_find_reverse PROTO_N ((cstring, c))
PROTO_T (CStringP cstring X
char c)
{
return (strrchr (cstring, c));
}
#ifdef FS_FAST
#define cstring_find_reverse(s, c) (strrchr ((s), (c)))
#endif /* defined (FS_FAST) */
CStringP
cstring_find_basename PROTO_N ((cstring))
PROTO_T (CStringP cstring)
{
CStringP bstring = cstring_find_reverse (cstring, '/');
if (bstring != NIL (CStringP)) {
cstring = bstring + 1;
}
return (cstring);
}