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- /* ---------------------------------------------------------------------- */
- /* Copyright (C) 1991 by Natürlich! */
- /* This file is copyrighted! */
- /* Refer to the documentation for details. */
- /* ---------------------------------------------------------------------- */
- #include "defines.h"
- #include "nasm.h"
- #include OSBIND
- #include "code.h"
- #include <stddef.h> /* get size_t */
- #include <string.h>
- #include <stdlib.h>
- #include "debug.h"
-
- #if STATISTICS
- #include "stats.h"
- #include <stdio.h>
- #endif
-
- extern char outofmem[];
-
- #if STATISTICS || ! VERSION
- #define MAXHISTORY 256
- #define MAXWATCHES 16
- #define MAGIC 0x41424344L
-
- static struct
- {
- byte huge *p;
- lword size;
- } history[ MAXHISTORY];
-
-
- static struct watch
- {
- unsigned long magic;
- unsigned char *p;
- char *name;
- short size;
- short occupied;
- unsigned long chksum;
- } watches[ MAXWATCHES] =
- {
- { MAGIC, 0, 0, 0, 0, 0 }, /* fill this up appropriately */
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 },
- { MAGIC, 0, 0, 0, 0, 0 }
- };
-
-
-
- unsigned long chksum( p, size)
- unsigned char *p;
- {
- unsigned long x;
- int i;
-
- x = *p++;
- for( i = 3; i-- && size; size--)
- x = (x << 8) + *p++;
- while( size--)
- x = (x << 3) + *p++;
- return( x);
- }
-
-
- void add_watch( p, size, name)
- unsigned char *p;
- size_t size;
- char *name;
- {
- struct watch *q;
- int i;
-
- ENTER("add_watch");
- if( ! p)
- return;
- for( q = watches, i = MAXWATCHES; i--; q++)
- if( ! q->occupied)
- {
- q->magic = MAGIC;
- q->p = p;
- q->name = name;
- q->size = size;
- q->chksum = chksum( p, (int) size);
- q->occupied = 1;
- LEAVE();
- return;
- }
- nierror("Watch space exhausted");
- }
-
-
- print_watches()
- {
- struct watch *q;
- int i;
-
- printf("Active watches:\n");
- for( q = watches, i = MAXWATCHES; i--; q++)
- if( q->occupied)
- printf( "\t%s\n", q->name);
- }
-
-
- void del_watch( p)
- unsigned char *p;
- {
- struct watch *q;
- int i;
-
- ENTER("del_watch");
- if( ! p)
- return;
- for( q = watches, i = MAXWATCHES; i--; q++)
- if( q->occupied && q->p == p)
- {
- q->occupied = 0;
- LEAVE();
- return;
- }
- nierror("Watch not found");
- }
-
-
- do_watch()
- {
- struct watch *q;
- int i;
-
- for( q = watches, i = MAXWATCHES; i--; q++)
- {
- if( q->magic != MAGIC)
- nierror("Good work! You managed to clobber the watch space");
-
- if( q->occupied && q->chksum != chksum( q->p, q->size))
- {
- auto char buffer[ 256];
-
- if( q->name)
- sprintf( buffer, "Someone clobbered >>%s<<", q->name);
- else
- sprintf( buffer, "Someone clobbered %d bytes @$%.8lX",
- q->size, (long) q->p);
- nierror( buffer);
- }
- }
- }
-
-
- check_mallocs()
- {
- int i = 0;
- byte huge *p, huge *q, huge *r;
-
- for( i = 0; i < MAXHISTORY; i++)
- if( p = (byte huge *) history[ i].p)
- {
- q = p - sizeof( lword);
- r = p + history[ i].size;
- if( lbeek( q) != MAGIC ||
- lbeek( r) != MAGIC)
- nierror("Someone clobbered the malloc space");
- }
- }
-
-
-
- do_check()
- {
- ENTER("do_check");
- do_watch();
- check_mallocs();
- LEAVE();
- }
-
-
-
- bad_pointer( p)
- byte huge *p;
- {
- int i = 0;
- byte huge *q;
-
- if( ! p)
- return;
- for( i = 0; i < MAXHISTORY; i++)
- if( (q = history[ i].p) && p >= q && p < (q + history[ i].size))
- return;
- nierror("You got a bad pointer here");
- }
-
- #endif
-
-
- byte huge *nmalloc( size)
- lword size;
- {
- register byte volatile huge *p;
-
- ENTER("nmalloc");
- #if ! VERSION
- if( size > 0x01000000)
- nwarning("Probably some conversion trouble when calling nmalloc");
- size += sizeof( lword) * 2;
- #endif
-
- #if STATISTICS
- _mused += size;
- if( _mused >= _maxused)
- _maxused = _mused;
- #endif
- /* fucking TURBO.C libraries, nothing works */
- #if OS == TOS && __TURBOC__ && ! defined( __PUREC__)
- if( ! (p = (byte huge *) malloc( size)) || (long) p < 0)
- #else
- if( ! (p = (byte huge *) malloc( size)))
- #endif
- nferror( outofmem);
- #if ! VERSION
- memset( p, 0xFF, size);
- # if OS == MSDOS
- if( get_ADDR( p) < 0x10000 || get_ADDR( p) > 0x400000)
- nierror( "Pointer trouble in paradise");
- # endif
- check_mallocs();
- if( ((*p = 0x55) && *p != 0x55) || ((*p = 0xAA) && *p != 0xAA))
- nierror("malloc is seriously fucked");
-
- lbyte( p, MAGIC);
- size -= sizeof( lword) * 2;
- p += sizeof( lword);
- lbyte( p + size, MAGIC);
- #endif
-
- #if STATISTICS || ! VERSION
- {
- register int i = 0;
-
- while( history[ i].p && i++ < MAXHISTORY);
- if( i == MAXHISTORY)
- nierror("Statistic space for nmalloc exhausted");
- history[ i].p = (byte huge *) p;
- history[ i].size = size;
- }
- #endif
- IMESS("Memory starts @$%8.8lX", (lword) p, 4);
- LEAVE();
- return( (byte huge *) p);
- }
-
- void nfree( p)
- void huge *p;
- {
- ENTER("nfree");
- if( ! p) /* check for p == NULL (Can happen!) */
- return;
- #if STATISTICS || ! VERSION
- {
- int i = 0;
-
- while( history[ i].p != p && i++ < MAXHISTORY);
- if( i == MAXHISTORY)
- nierror("Faulty nfree");
- #if STATISTICS
- _mused -= history[ i].size;
- #endif
- memset( (char *) p - sizeof( lword), 0xFE, history[ i].size + 2 * sizeof( lword));
- history[i].p = 0;
- }
- #endif
- #if ! VERSION
- (char huge *) p -= sizeof( lword);
- #endif
- free( p);
- LEAVE();
- }
-
-
- char *get_filename( pathname)
- char *pathname;
- {
- register char c,
- *p = pathname;
-
- while( (c = *p++) && c != DIRSLASH);
- if( ! c)
- return( pathname);
- while( *p++);
- while( *--p != DIRSLASH);
- return( ++p);
- }
-
-
- void complete( filename, ext, force)
- char *filename, *ext;
- {
- char *x;
-
- ENTER("complete");
-
- if( x = strrchr( filename, '.'))
- {
- if( strrchr( filename, DIRSLASH) > x)
- goto dis;
- if( force)
- while( *++x = *++ext);
- }
- else
- dis:
- strcat( filename, ext);
- LEAVE();
- }
-
- #if LOWERFILE
- #include <ctype.h>
-
- void downcase( s)
- register char *s;
- {
- register char c;
-
- while( c = *s)
- *s++ = tolower( c);
- }
- #endif
- /* ---------------------------------------------------------- */
- /* Character representation (from Your Atari Computer) */
- /* $00-$1F -> $40-$5F (+ $40) */
- /* $20-$5F -> $00-$3F (- $20) */
- /* $60-$7F -> $60-$7F (+-$00) */
- /* $80-$9F -> $C0-$DF (+ $40) */
- /* $A0-$DF -> $80-$BF (- $20) */
- /* $EO-$FF -> $E0-$FF (+-$00) */
- /* ---------------------------------------------------------- */
- byte scrtab[] =
- {
- 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
- 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
- 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
- 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
- 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
- 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
- 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
- 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
- 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
- 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
- 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
- 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
- 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
- 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
-
- 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
- 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
- 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
- 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
- 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
- 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
- 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
- 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
- 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
- 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
- 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
- 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
- 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
- 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
- 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
- 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
- };
-
-