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/*
Crown Copyright (c) 1996
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.
*/
/*
VERSION INFORMATION
===================
--------------------------------------------------------------------------
$Header: /u/g/release/CVSROOT/Source/src/installers/680x0/common/utility.c,v 1.1.1.1 1998/01/17 15:55:49 release Exp $
--------------------------------------------------------------------------
$Log: utility.c,v $
* Revision 1.1.1.1 1998/01/17 15:55:49 release
* First version to be checked into rolling release.
*
Revision 1.1.1.1 1997/10/13 12:43:00 ma
First version.
Revision 1.3 1997/10/13 08:50:16 ma
Made all pl_tests for general proc & exception handling pass.
Revision 1.2 1997/03/20 12:52:20 ma
Removed #if 0 and #endif around used definitions.
Revision 1.1.1.1 1997/03/14 07:50:19 ma
Imported from DRA
* Revision 1.1.1.1 1996/09/20 10:56:59 john
*
* Revision 1.1.1.1 1996/03/26 15:45:18 john
*
* Revision 1.4 94/11/08 11:24:26 11:24:26 ra (Robert Andrews)
* Changed error reporting format slightly.
*
* Revision 1.3 94/02/21 16:05:37 16:05:37 ra (Robert Andrews)
* Clear up a long-int confusion.
*
* Revision 1.2 93/04/19 13:37:53 13:37:53 ra (Robert Andrews)
* Line numbers in error reports were wrong.
*
* Revision 1.1 93/02/22 17:16:55 17:16:55 ra (Robert Andrews)
* Initial revision
*
--------------------------------------------------------------------------
*/
#include "config.h"
#if FS_STDARG
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include "common_types.h"
#include "basicread.h"
#include "instrs.h"
#include "utility.h"
extern long crt_line_num ;
extern char *crt_fname ;
extern char *progname ;
long total_calloced ;
#if 0
/* Makes automatically generated makefile work */
#include "xalloc.c"
#endif
/*
FIND THE BASENAME OF A FILE
The string nm is analysed and a pointer to the character after the
last '/' is returned.
*/
char *basename
PROTO_N ( ( nm ) )
PROTO_T ( char *nm )
{
char *bn = nm ;
for ( ; *nm ; nm++ ) if ( *nm == '/' ) bn = nm + 1 ;
return ( bn ) ;
}
/*
FIND THE FIRST NONZERO BIT
This routine returns the bit number of the least significant set
bit in n. For 0 it returns -1.
*/
int bit_one
PROTO_N ( ( n ) )
PROTO_T ( bitpattern n )
{
int c = 0 ;
bitpattern m ;
for ( m = n ; m ; m >>= 1, c++ ) if ( m & 1 ) return ( c ) ;
return ( -1 ) ;
}
/*
FIND THE NUMBER OF SET BITS
The number of set bits in n is returned.
*/
int bits_in
PROTO_N ( ( n ) )
PROTO_T ( bitpattern n )
{
/* Table of bits in : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F */
static int b [16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 } ;
int c = 0 ;
while ( n ) {
c += b [ n & 0xf ] ;
n >>= 4 ;
}
return ( c ) ;
}
/*
BIT PATTERNS
lo_bits [n] is the number with its bottom n bits set and the rest
zero. hi_bits [n] is the number with its top n bits set and the rest
zero.
*/
bitpattern lo_bits [] = { 0,
0x00000001, 0x00000003, 0x00000007, 0x0000000f,
0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff,
0x000001ff, 0x000003ff, 0x000007ff, 0x00000fff,
0x00001fff, 0x00003fff, 0x00007fff, 0x0000ffff,
0x0001ffff, 0x0003ffff, 0x0007ffff, 0x000fffff,
0x001fffff, 0x003fffff, 0x007fffff, 0x00ffffff,
0x01ffffff, 0x03ffffff, 0x07ffffff, 0x0fffffff,
0x1fffffff, 0x3fffffff, 0x7fffffff, 0xffffffff } ;
bitpattern hi_bits [] = { 0,
0x80000000, 0xc0000000, 0xe0000000, 0xf0000000,
0xf8000000, 0xfc000000, 0xfe000000, 0xff000000,
0xff800000, 0xffc00000, 0xffe00000, 0xfff00000,
0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000,
0xffff8000, 0xffffc000, 0xffffe000, 0xfffff000,
0xfffff800, 0xfffffc00, 0xfffffe00, 0xffffff00,
0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0,
0xfffffff8, 0xfffffffc, 0xfffffffe, 0xffffffff } ;
/*
NUMBER OF ERRORS
errors is the number of errors which have occurred. max_errors is
the maximum number of errors that will be tolerated before exiting.
*/
int errors = 0 ;
#ifdef EBUG
int max_errors = 10 ;
#else
int max_errors = 1 ;
#endif
/*
PRINT AN ERROR REPORT
This routine prints the error report s together with any additional
arguments.
*/
void error
PROTO_V ( ( char *s, ... ) )
{
char c ;
char *p ;
va_list args ;
#if FS_STDARG
va_start ( args, s ) ;
p = s ;
#else
va_start ( args ) ;
p = va_arg ( args, char * ) ;
#endif
if ( progname ) fprintf ( stderr, "%s : ", progname ) ;
fprintf ( stderr, "Error : " ) ;
c = *p ;
if ( c >= 'a' && c <= 'z' ) {
c += ( 'A' - 'a' ) ;
fputc ( c, stderr ) ;
p++ ;
}
vfprintf ( stderr, p, args ) ;
if ( crt_line_num != -1 && crt_fname ) {
fprintf ( stderr, ", %s, line %ld", crt_fname, crt_line_num ) ;
}
fprintf ( stderr, ".\n" ) ;
va_end ( args ) ;
#ifdef IGNORE_ERRORS
return ;
#endif
if ( max_errors == 0 ) exit ( EXIT_FAILURE ) ;
if ( ++errors > max_errors ) {
fprintf ( stderr, "%s : Too many errors.\n", progname ) ;
exit ( EXIT_FAILURE ) ;
}
return ;
}
/*
PRINT A SIMPLE ERROR
This routine prints the simple error report s.
*/
void failer
PROTO_N ( ( s ) )
PROTO_T ( char *s )
{
error ( s ) ;
return ;
}
/*
PRINT A WARNING
This routine prints the warning message s together with any additional
arguments.
*/
void warning
PROTO_V ( ( char *s, ... ) )
{
char c ;
char *p ;
va_list args ;
#if FS_STDARG
va_start ( args, s ) ;
p = s ;
#else
va_start ( args ) ;
p = va_arg ( args, char * ) ;
#endif
if ( progname ) ( void ) fprintf ( stderr, "%s : ", progname ) ;
fprintf ( stderr, "Warning : " ) ;
c = *p ;
if ( c >= 'a' && c <= 'z' ) {
c += ( 'A' - 'a' ) ;
fputc ( c, stderr ) ;
p++ ;
}
( void ) vfprintf ( stderr, p, args ) ;
( void ) fprintf ( stderr, ".\n" ) ;
va_end ( args ) ;
return ;
}
/*
MEMORY HACK VALUE
*/
#define memhack 0
/*
ALLOCATE A BLOCK OF MEMORY
A pointer to a block of memory of size sz is returned. Failure to
allocate this memory gives an immediate fatal error.
*/
voidstar xmalloc
PROTO_N ( ( sz ) )
PROTO_T ( size_t sz )
{
voidstar res ;
if ( sz == 0 ) return ( null ) ;
res = ( voidstar ) malloc ( sz + memhack ) ;
if ( res == null ) {
error ( "Can't allocate memory" ) ;
exit ( EXIT_FAILURE ) ;
}
#ifdef MEM_DEBUG
printf ( "%d (malloc, %d bytes)\n", res, sz ) ;
fflush ( stdout ) ;
#endif
return ( res ) ;
}
/*
ALLOCATE ROOM IN MEMORY
A pointer to a block of memory of size n * sz is returned. This
memory is initialized to 0. Failure to allocate memory gives an
immediate fatal error.
*/
voidstar xcalloc
PROTO_N ( ( n, sz ) )
PROTO_T ( int n X size_t sz )
{
voidstar res ;
if ( n == 0 || sz == 0 ) return ( null ) ;
if ( sz == sizeof ( char ) && n < 100 ) {
/* Be careful not to free character arrays */
static char *cbuffer = null ;
static size_t cbuffsz = 0 ;
if ( n + memhack >= cbuffsz ) {
cbuffsz = 2000 ;
cbuffer = ( char * ) calloc ( cbuffsz, sizeof ( char ) ) ;
if ( cbuffer == null ) {
error ( "Can't allocate memory" ) ;
exit ( EXIT_FAILURE ) ;
}
}
res = ( voidstar ) cbuffer ;
cbuffer += ( n + memhack ) ;
cbuffsz -= ( n + memhack ) ;
} else {
res = ( voidstar ) calloc ( n + memhack, sz ) ;
if ( res == null ) {
error ( "Can't allocate memory" ) ;
exit ( EXIT_FAILURE ) ;
}
}
#ifdef MEM_DEBUG
printf ( "%d (calloc, %d bytes)\n", res, n * sz ) ;
fflush ( stdout ) ;
#endif
return ( res ) ;
}
/*
REALLOCATE A BLOCK OF MEMORY
The previously allocated memory pointed to by p is reallocated
to size n. A pointer to the new block of memory is returned.
Failure to allocate memory gives an immediate fatal error.
*/
voidstar xrealloc
PROTO_N ( ( p, sz ) )
PROTO_T ( voidstar p X size_t sz )
{
voidstar res ;
if ( p == null ) return ( xmalloc ( sz ) ) ;
if ( sz == 0 ) return ( null ) ;
res = ( voidstar ) realloc ( p, sz + memhack ) ;
if ( res == null ) {
error ( "Can't reallocate memory" ) ;
exit ( EXIT_FAILURE ) ;
}
#ifdef MEM_DEBUG
printf ( "%d (realloc, %d bytes)\n", res, sz ) ;
fflush ( stdout ) ;
#endif
return ( res ) ;
}
/*
FREE A BLOCK OF MEMORY
The block of memory pointed to by p is returned to free. p must
previously have been allocated using one of the routines above.
*/
void xfree
PROTO_N ( ( p ) )
PROTO_T ( voidstar p )
{
if ( p == null ) return ;
free ( p ) ;
return ;
}