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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.
*/
/**** dstring.c --- String manipulation.
*
** Author: Steve Folkes <smf@hermes.mod.uk>
*
**** Commentary:
*
* This file implements the string manipulation facility specified in the file
* "dstring.h". See that file for more details.
*
**** Change Log:
* $Log: dstring.c,v $
* Revision 1.1.1.1 1998/01/17 15:57:16 release
* First version to be checked into rolling release.
*
* Revision 1.2 1994/12/12 11:44:33 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 16:05:49 smf
* Initial import of library shared files.
*
**/
/****************************************************************************/
#include "dstring.h"
#include "syntax.h"
/*--------------------------------------------------------------------------*/
#define DSTRING_CHUNK_SIZE 32
/*** Functions for manipulating nstrings.
**/
void
nstring_init PROTO_N ((nstring))
PROTO_T (NStringP nstring)
{
nstring->length = 0;
nstring->contents = NIL (CStringP);
}
void
nstring_init_length PROTO_N ((nstring, length))
PROTO_T (NStringP nstring X
unsigned length)
{
nstring->length = length;
nstring->contents = ALLOCATE_VECTOR (char, length);
}
void
nstring_assign PROTO_N ((to, from))
PROTO_T (NStringP to X
NStringP from)
{
to->length = nstring_length (from);
to->contents = (from->contents);
}
void
nstring_copy_cstring PROTO_N ((nstring, cstring))
PROTO_T (NStringP nstring X
CStringP cstring)
{
unsigned length = cstring_length (cstring);
if (length > 0) {
nstring->length = length;
nstring->contents = ALLOCATE_VECTOR (char, length);
(void) memcpy ((GenericP) (nstring->contents), (GenericP) cstring,
(SizeT) length);
} else {
nstring->length = 0;
nstring->contents = NIL (CStringP);
}
}
void
nstring_insert_cstring PROTO_N ((nstring, cstring))
PROTO_T (NStringP nstring X
CStringP cstring)
{
unsigned length = nstring_length (nstring);
if (length > 0) {
(void) memcpy ((GenericP) (nstring->contents), (GenericP) cstring,
(SizeT) length);
}
}
void
nstring_copy PROTO_N ((to, from))
PROTO_T (NStringP to X
NStringP from)
{
unsigned length = nstring_length (from);
if (length > 0) {
to->length = length;
to->contents = ALLOCATE_VECTOR (char, length);
(void) memcpy ((GenericP) (to->contents),
(GenericP) (from->contents), (SizeT) length);
} else {
to->length = 0;
to->contents = NIL (CStringP);
}
}
CStringP
nstring_to_cstring PROTO_N ((nstring))
PROTO_T (NStringP nstring)
{
unsigned length = nstring_length (nstring);
CStringP tmp = ALLOCATE_VECTOR (char, length + 1);
if (length > 0) {
(void) memcpy ((GenericP) tmp, (GenericP) (nstring->contents),
(SizeT) length);
}
tmp [length] = '\0';
return (tmp);
}
unsigned
nstring_hash_value PROTO_N ((nstring))
PROTO_T (NStringP nstring)
{
unsigned value = 0;
CStringP tmp_contents = (nstring->contents);
unsigned tmp_length = nstring_length (nstring);
while (tmp_length --) {
value += ((unsigned) (*tmp_contents ++));
}
return (value);
}
#ifdef FS_FAST
#undef nstring_length
#endif /* defined (FS_FAST) */
unsigned
nstring_length PROTO_N ((nstring))
PROTO_T (NStringP nstring)
{
return (nstring->length);
}
#ifdef FS_FAST
#define nstring_length(s) ((s)->length)
#endif /* defined (FS_FAST) */
#ifdef FS_FAST
#undef nstring_contents
#endif /* defined (FS_FAST) */
CStringP
nstring_contents PROTO_N ((nstring))
PROTO_T (NStringP nstring)
{
return (nstring->contents);
}
#ifdef FS_FAST
#define nstring_contents(s) ((s)->contents)
#endif /* defined (FS_FAST) */
CmpT
nstring_compare PROTO_N ((nstring1, nstring2))
PROTO_T (NStringP nstring1 X
NStringP nstring2)
{
unsigned length = nstring_length (nstring1);
int status;
if (length > nstring_length (nstring2)) {
length = nstring_length (nstring2);
}
status = memcmp ((GenericP) (nstring1->contents),
(GenericP) (nstring2->contents), (SizeT) length);
if (status < 0) {
return (CMP_LT);
} else if (status > 0) {
return (CMP_GT);
} else if (nstring_length (nstring1) < nstring_length (nstring2)) {
return (CMP_LT);
} else if (nstring_length (nstring1) > nstring_length (nstring2)) {
return (CMP_GT);
} else {
return (CMP_EQ);
}
}
BoolT
nstring_equal PROTO_N ((nstring1, nstring2))
PROTO_T (NStringP nstring1 X
NStringP nstring2)
{
unsigned length = nstring_length (nstring1);
return ((length == nstring_length (nstring2)) &&
(memcmp ((GenericP) (nstring1->contents),
(GenericP) (nstring2->contents), (SizeT) length) == 0));
}
BoolT
nstring_ci_equal PROTO_N ((nstring1, nstring2))
PROTO_T (NStringP nstring1 X
NStringP nstring2)
{
unsigned length = nstring_length (nstring1);
if (length == nstring_length (nstring2)) {
CStringP tmp1 = (nstring1->contents);
CStringP tmp2 = (nstring2->contents);
char c1;
char c2;
do {
c1 = syntax_upcase (*tmp1 ++);
c2 = syntax_upcase (*tmp2 ++);
if (length -- == 0) {
return (TRUE);
}
} while (c1 == c2);
}
return (FALSE);
}
BoolT
nstring_contains PROTO_N ((nstring, c))
PROTO_T (NStringP nstring X
char c)
{
CStringP contents = nstring_contents (nstring);
unsigned length = nstring_length (nstring);
return (memchr ((GenericP) contents, c, (SizeT) length) != NIL (GenericP));
}
BoolT
nstring_is_prefix PROTO_N ((nstring1, nstring2))
PROTO_T (NStringP nstring1 X
NStringP nstring2)
{
CStringP contents1 = nstring_contents (nstring1);
CStringP contents2 = nstring_contents (nstring2);
unsigned length = nstring_length (nstring2);
return ((length < nstring_length (nstring1)) &&
(memcmp ((GenericP) contents1, (GenericP) contents2,
(SizeT) length) == 0));
}
void
nstring_destroy PROTO_N ((nstring))
PROTO_T (NStringP nstring)
{
DEALLOCATE (nstring->contents);
}
void
write_nstring PROTO_N ((ostream, nstring))
PROTO_T (OStreamP ostream X
NStringP nstring)
{
unsigned length = nstring_length (nstring);
if (length > 0) {
write_chars (ostream, nstring->contents, length);
}
}
/*** Functions for manipulating dstrings.
**/
void
dstring_init PROTO_N ((dstring))
PROTO_T (DStringP dstring)
{
dstring->length = 0;
dstring->max_length = DSTRING_CHUNK_SIZE;
dstring->contents = ALLOCATE_VECTOR (char, dstring->max_length);
}
#ifdef FS_FAST
#undef dstring_length
#endif /* defined (FS_FAST) */
unsigned
dstring_length PROTO_N ((dstring))
PROTO_T (DStringP dstring)
{
return (dstring->length);
}
#ifdef FS_FAST
#define dstring_length(s) ((s)->length)
#endif /* defined (FS_FAST) */
void
dstring_append_char PROTO_N ((dstring, c))
PROTO_T (DStringP dstring X
char c)
{
if ((dstring->length) >= (dstring->max_length)) {
CStringP tmp;
dstring->max_length += DSTRING_CHUNK_SIZE;
tmp = ALLOCATE_VECTOR (char, dstring->max_length);
(void) memcpy ((GenericP) tmp, (GenericP) (dstring->contents),
(SizeT) (dstring->length));
DEALLOCATE (dstring->contents);
dstring->contents = tmp;
}
dstring->contents [dstring->length ++] = c;
}
void
dstring_append_cstring PROTO_N ((dstring, cstring))
PROTO_T (DStringP dstring X
CStringP cstring)
{
unsigned clength = cstring_length (cstring);
unsigned length = (clength + (dstring->length));
if (length > (dstring->max_length)) {
CStringP tmp;
while ((dstring->max_length) < length) {
dstring->max_length += DSTRING_CHUNK_SIZE;
}
tmp = ALLOCATE_VECTOR (char, dstring->max_length);
(void) memcpy ((GenericP) tmp, (GenericP) (dstring->contents),
(SizeT) (dstring->length));
DEALLOCATE (dstring->contents);
dstring->contents = tmp;
}
(void) memcpy ((GenericP) &(dstring->contents [dstring->length]),
(GenericP) cstring, (SizeT) clength);
dstring->length = length;
}
void
dstring_append_nstring PROTO_N ((dstring, nstring))
PROTO_T (DStringP dstring X
NStringP nstring)
{
unsigned nlength = nstring_length (nstring);
unsigned length = (nlength + (dstring->length));
if (length > (dstring->max_length)) {
CStringP tmp;
while ((dstring->max_length) < length) {
dstring->max_length += DSTRING_CHUNK_SIZE;
}
tmp = ALLOCATE_VECTOR (char, dstring->max_length);
(void) memcpy ((GenericP) tmp, (GenericP) (dstring->contents),
(SizeT) (dstring->length));
DEALLOCATE (dstring->contents);
dstring->contents = tmp;
}
(void) memcpy ((GenericP) &(dstring->contents [dstring->length]),
(GenericP) nstring_contents (nstring), (SizeT) nlength);
dstring->length = length;
}
BoolT
dstring_last_char_equal PROTO_N ((dstring, c))
PROTO_T (DStringP dstring X
char c)
{
return ((dstring->length) &&
((dstring->contents [dstring->length - 1]) == c));
}
void
dstring_to_nstring PROTO_N ((dstring, nstring))
PROTO_T (DStringP dstring X
NStringP nstring)
{
if (dstring->length > 0) {
nstring->length = (dstring->length);
nstring->contents = ALLOCATE_VECTOR (char, dstring->length);
(void) memcpy ((GenericP) (nstring->contents),
(GenericP) (dstring->contents),
(SizeT) (dstring->length));
} else {
nstring->length = 0;
nstring->contents = NIL (CStringP);
}
}
CStringP
dstring_to_cstring PROTO_N ((dstring))
PROTO_T (DStringP dstring)
{
CStringP tmp = ALLOCATE_VECTOR (char, dstring->length + 1);
if (dstring->length > 0) {
(void) memcpy ((GenericP) tmp, (GenericP) (dstring->contents),
(SizeT) (dstring->length));
}
tmp [dstring->length] = '\0';
return (tmp);
}
CStringP
dstring_destroy_to_cstring PROTO_N ((dstring))
PROTO_T (DStringP dstring)
{
CStringP tmp;
if ((dstring->length) >= (dstring->max_length)) {
tmp = ALLOCATE_VECTOR (char, (dstring->length) + 1);
(void) memcpy ((GenericP) tmp, (GenericP) (dstring->contents),
(SizeT) (dstring->length));
DEALLOCATE (dstring->contents);
} else {
tmp = (dstring->contents);
}
tmp [dstring->length] = '\0';
dstring->length = 0;
dstring->max_length = 0;
dstring->contents = NIL (CStringP);
return (tmp);
}
void
dstring_destroy PROTO_N ((dstring))
PROTO_T (DStringP dstring)
{
DEALLOCATE (dstring->contents);
}
/*
* Local variables(smf):
* eval: (include::add-path-entry "../os-interface" "../generated")
* end:
**/