/*
-======================================================================
-lwio.c
+ ======================================================================
+ lwio.c
-Functions for reading basic LWO2 data types.
+ Functions for reading basic LWO2 data types.
-Ernie Wright 17 Sep 00
-====================================================================== */
+ Ernie Wright 17 Sep 00
+ ====================================================================== */
#include "../picointernal.h"
#include "lwo2.h"
/*
-======================================================================
-flen
+ ======================================================================
+ flen
-This accumulates a count of the number of bytes read. Callers can set
-it at the beginning of a sequence of reads and then retrieve it to get
-the number of bytes actually read. If one of the I/O functions fails,
-flen is set to an error code, after which the I/O functions ignore
-read requests until flen is reset.
-====================================================================== */
+ This accumulates a count of the number of bytes read. Callers can set
+ it at the beginning of a sequence of reads and then retrieve it to get
+ the number of bytes actually read. If one of the I/O functions fails,
+ flen is set to an error code, after which the I/O functions ignore
+ read requests until flen is reset.
+ ====================================================================== */
-#define INT_MIN (-2147483647 - 1) /* minimum (signed) int value */
+#define INT_MIN ( -2147483647 - 1 ) /* minimum (signed) int value */
#define FLEN_ERROR INT_MIN
static int flen;
#ifdef _WIN32
/*
-=====================================================================
-revbytes()
+ =====================================================================
+ revbytes()
-Reverses byte order in place.
+ Reverses byte order in place.
-INPUTS
+ INPUTS
bp bytes to reverse
elsize size of the underlying data type
elcount number of elements to swap
-RESULTS
+ RESULTS
Reverses the byte order in each of elcount elements.
-This only needs to be defined on little-endian platforms, most
-notably Windows. lwo2.h replaces this with a #define on big-endian
-platforms.
-===================================================================== */
-
-void revbytes( void *bp, int elsize, int elcount )
-{
- register unsigned char *p, *q;
-
- p = ( unsigned char * ) bp;
-
- if ( elsize == 2 ) {
- q = p + 1;
- while ( elcount-- ) {
- *p ^= *q;
- *q ^= *p;
- *p ^= *q;
- p += 2;
- q += 2;
- }
- return;
- }
-
- while ( elcount-- ) {
- q = p + elsize - 1;
- while ( p < q ) {
- *p ^= *q;
- *q ^= *p;
- *p ^= *q;
- ++p;
- --q;
- }
- p += elsize >> 1;
- }
+ This only needs to be defined on little-endian platforms, most
+ notably Windows. lwo2.h replaces this with a #define on big-endian
+ platforms.
+ ===================================================================== */
+
+void revbytes( void *bp, int elsize, int elcount ){
+ register unsigned char *p, *q;
+
+ p = ( unsigned char * ) bp;
+
+ if ( elsize == 2 ) {
+ q = p + 1;
+ while ( elcount-- ) {
+ *p ^= *q;
+ *q ^= *p;
+ *p ^= *q;
+ p += 2;
+ q += 2;
+ }
+ return;
+ }
+
+ while ( elcount-- ) {
+ q = p + elsize - 1;
+ while ( p < q ) {
+ *p ^= *q;
+ *q ^= *p;
+ *p ^= *q;
+ ++p;
+ --q;
+ }
+ p += elsize >> 1;
+ }
}
#endif
-void *getbytes( picoMemStream_t *fp, int size )
-{
- void *data;
-
- if ( flen == FLEN_ERROR ) return NULL;
- if ( size < 0 ) {
- flen = FLEN_ERROR;
- return NULL;
- }
- data = _pico_alloc( size );
- if ( !data ) {
- flen = FLEN_ERROR;
- return NULL;
- }
- if ( 1 != _pico_memstream_read( fp, data, size )) {
- flen = FLEN_ERROR;
- _pico_free( data );
- return NULL;
- }
-
- flen += size;
- return data;
+void *getbytes( picoMemStream_t *fp, int size ){
+ void *data;
+
+ if ( flen == FLEN_ERROR ) {
+ return NULL;
+ }
+ if ( size < 0 ) {
+ flen = FLEN_ERROR;
+ return NULL;
+ }
+ data = _pico_alloc( size );
+ if ( !data ) {
+ flen = FLEN_ERROR;
+ return NULL;
+ }
+ if ( 1 != _pico_memstream_read( fp, data, size ) ) {
+ flen = FLEN_ERROR;
+ _pico_free( data );
+ return NULL;
+ }
+
+ flen += size;
+ return data;
}
-void skipbytes( picoMemStream_t *fp, int n )
-{
- if ( flen == FLEN_ERROR ) return;
- if ( _pico_memstream_seek( fp, n, PICO_SEEK_CUR ))
- flen = FLEN_ERROR;
- else
- flen += n;
+void skipbytes( picoMemStream_t *fp, int n ){
+ if ( flen == FLEN_ERROR ) {
+ return;
+ }
+ if ( _pico_memstream_seek( fp, n, PICO_SEEK_CUR ) ) {
+ flen = FLEN_ERROR;
+ }
+ else{
+ flen += n;
+ }
}
-int getI1( picoMemStream_t *fp )
-{
- int i;
-
- if ( flen == FLEN_ERROR ) return 0;
- i = _pico_memstream_getc( fp );
- if ( i < 0 ) {
- flen = FLEN_ERROR;
- return 0;
- }
- if ( i > 127 ) i -= 256;
- flen += 1;
- return i;
+int getI1( picoMemStream_t *fp ){
+ int i;
+
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ i = _pico_memstream_getc( fp );
+ if ( i < 0 ) {
+ flen = FLEN_ERROR;
+ return 0;
+ }
+ if ( i > 127 ) {
+ i -= 256;
+ }
+ flen += 1;
+ return i;
}
-short getI2( picoMemStream_t *fp )
-{
- short i;
+short getI2( picoMemStream_t *fp ){
+ short i;
- if ( flen == FLEN_ERROR ) return 0;
- if ( 1 != _pico_memstream_read( fp, &i, 2 )) {
- flen = FLEN_ERROR;
- return 0;
- }
- revbytes( &i, 2, 1 );
- flen += 2;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ if ( 1 != _pico_memstream_read( fp, &i, 2 ) ) {
+ flen = FLEN_ERROR;
+ return 0;
+ }
+ revbytes( &i, 2, 1 );
+ flen += 2;
+ return i;
}
-int getI4( picoMemStream_t *fp )
-{
- int i;
+int getI4( picoMemStream_t *fp ){
+ int i;
- if ( flen == FLEN_ERROR ) return 0;
- if ( 1 != _pico_memstream_read( fp, &i, 4 )) {
- flen = FLEN_ERROR;
- return 0;
- }
- revbytes( &i, 4, 1 );
- flen += 4;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ if ( 1 != _pico_memstream_read( fp, &i, 4 ) ) {
+ flen = FLEN_ERROR;
+ return 0;
+ }
+ revbytes( &i, 4, 1 );
+ flen += 4;
+ return i;
}
-unsigned char getU1( picoMemStream_t *fp )
-{
- int i;
+unsigned char getU1( picoMemStream_t *fp ){
+ int i;
- if ( flen == FLEN_ERROR ) return 0;
- i = _pico_memstream_getc( fp );
- if ( i < 0 ) {
- flen = FLEN_ERROR;
- return 0;
- }
- flen += 1;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ i = _pico_memstream_getc( fp );
+ if ( i < 0 ) {
+ flen = FLEN_ERROR;
+ return 0;
+ }
+ flen += 1;
+ return i;
}
-unsigned short getU2( picoMemStream_t *fp )
-{
- unsigned short i;
+unsigned short getU2( picoMemStream_t *fp ){
+ unsigned short i;
- if ( flen == FLEN_ERROR ) return 0;
- if ( 1 != _pico_memstream_read( fp, &i, 2 )) {
- flen = FLEN_ERROR;
- return 0;
- }
- revbytes( &i, 2, 1 );
- flen += 2;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ if ( 1 != _pico_memstream_read( fp, &i, 2 ) ) {
+ flen = FLEN_ERROR;
+ return 0;
+ }
+ revbytes( &i, 2, 1 );
+ flen += 2;
+ return i;
}
-unsigned int getU4( picoMemStream_t *fp )
-{
- unsigned int i;
+unsigned int getU4( picoMemStream_t *fp ){
+ unsigned int i;
- if ( flen == FLEN_ERROR ) return 0;
- if ( 1 != _pico_memstream_read( fp, &i, 4 )) {
- flen = FLEN_ERROR;
- return 0;
- }
- revbytes( &i, 4, 1 );
- flen += 4;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ if ( 1 != _pico_memstream_read( fp, &i, 4 ) ) {
+ flen = FLEN_ERROR;
+ return 0;
+ }
+ revbytes( &i, 4, 1 );
+ flen += 4;
+ return i;
}
-int getVX( picoMemStream_t *fp )
-{
- int i, c;
-
- if ( flen == FLEN_ERROR ) return 0;
-
- c = _pico_memstream_getc( fp );
- if ( c != 0xFF ) {
- i = c << 8;
- c = _pico_memstream_getc( fp );
- i |= c;
- flen += 2;
- }
- else {
- c = _pico_memstream_getc( fp );
- i = c << 16;
- c = _pico_memstream_getc( fp );
- i |= c << 8;
- c = _pico_memstream_getc( fp );
- i |= c;
- flen += 4;
- }
-
- if ( _pico_memstream_error( fp )) {
- flen = FLEN_ERROR;
- return 0;
- }
- return i;
+int getVX( picoMemStream_t *fp ){
+ int i, c;
+
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+
+ c = _pico_memstream_getc( fp );
+ if ( c != 0xFF ) {
+ i = c << 8;
+ c = _pico_memstream_getc( fp );
+ i |= c;
+ flen += 2;
+ }
+ else {
+ c = _pico_memstream_getc( fp );
+ i = c << 16;
+ c = _pico_memstream_getc( fp );
+ i |= c << 8;
+ c = _pico_memstream_getc( fp );
+ i |= c;
+ flen += 4;
+ }
+
+ if ( _pico_memstream_error( fp ) ) {
+ flen = FLEN_ERROR;
+ return 0;
+ }
+ return i;
}
-float getF4( picoMemStream_t *fp )
-{
- float f;
+float getF4( picoMemStream_t *fp ){
+ float f;
- if ( flen == FLEN_ERROR ) return 0.0f;
- if ( 1 != _pico_memstream_read( fp, &f, 4 )) {
- flen = FLEN_ERROR;
- return 0.0f;
- }
- revbytes( &f, 4, 1 );
- flen += 4;
- return f;
+ if ( flen == FLEN_ERROR ) {
+ return 0.0f;
+ }
+ if ( 1 != _pico_memstream_read( fp, &f, 4 ) ) {
+ flen = FLEN_ERROR;
+ return 0.0f;
+ }
+ revbytes( &f, 4, 1 );
+ flen += 4;
+ return f;
}
-char *getS0( picoMemStream_t *fp )
-{
- char *s;
- int i, c, len, pos;
-
- if ( flen == FLEN_ERROR ) return NULL;
-
- pos = _pico_memstream_tell( fp );
- for ( i = 1; ; i++ ) {
- c = _pico_memstream_getc( fp );
- if ( c <= 0 ) break;
- }
- if ( c < 0 ) {
- flen = FLEN_ERROR;
- return NULL;
- }
-
- if ( i == 1 ) {
- if ( _pico_memstream_seek( fp, pos + 2, PICO_SEEK_SET ))
- flen = FLEN_ERROR;
- else
- flen += 2;
- return NULL;
- }
-
- len = i + ( i & 1 );
- s = _pico_alloc( len );
- if ( !s ) {
- flen = FLEN_ERROR;
- return NULL;
- }
-
- if ( _pico_memstream_seek( fp, pos, PICO_SEEK_SET )) {
- flen = FLEN_ERROR;
- return NULL;
- }
- if ( 1 != _pico_memstream_read( fp, s, len )) {
- flen = FLEN_ERROR;
- return NULL;
- }
-
- flen += len;
- return s;
+char *getS0( picoMemStream_t *fp ){
+ char *s;
+ int i, c, len, pos;
+
+ if ( flen == FLEN_ERROR ) {
+ return NULL;
+ }
+
+ pos = _pico_memstream_tell( fp );
+ for ( i = 1; ; i++ ) {
+ c = _pico_memstream_getc( fp );
+ if ( c <= 0 ) {
+ break;
+ }
+ }
+ if ( c < 0 ) {
+ flen = FLEN_ERROR;
+ return NULL;
+ }
+
+ if ( i == 1 ) {
+ if ( _pico_memstream_seek( fp, pos + 2, PICO_SEEK_SET ) ) {
+ flen = FLEN_ERROR;
+ }
+ else{
+ flen += 2;
+ }
+ return NULL;
+ }
+
+ len = i + ( i & 1 );
+ s = _pico_alloc( len );
+ if ( !s ) {
+ flen = FLEN_ERROR;
+ return NULL;
+ }
+
+ if ( _pico_memstream_seek( fp, pos, PICO_SEEK_SET ) ) {
+ flen = FLEN_ERROR;
+ return NULL;
+ }
+ if ( 1 != _pico_memstream_read( fp, s, len ) ) {
+ flen = FLEN_ERROR;
+ return NULL;
+ }
+
+ flen += len;
+ return s;
}
-int sgetI1( unsigned char **bp )
-{
- int i;
+int sgetI1( unsigned char **bp ){
+ int i;
- if ( flen == FLEN_ERROR ) return 0;
- i = **bp;
- if ( i > 127 ) i -= 256;
- flen += 1;
- (*bp)++;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ i = **bp;
+ if ( i > 127 ) {
+ i -= 256;
+ }
+ flen += 1;
+ ( *bp )++;
+ return i;
}
-short sgetI2( unsigned char **bp )
-{
- short i;
+short sgetI2( unsigned char **bp ){
+ short i;
- if ( flen == FLEN_ERROR ) return 0;
- memcpy( &i, *bp, 2 );
- revbytes( &i, 2, 1 );
- flen += 2;
- *bp += 2;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ memcpy( &i, *bp, 2 );
+ revbytes( &i, 2, 1 );
+ flen += 2;
+ *bp += 2;
+ return i;
}
-int sgetI4( unsigned char **bp )
-{
- int i;
+int sgetI4( unsigned char **bp ){
+ int i;
- if ( flen == FLEN_ERROR ) return 0;
- memcpy( &i, *bp, 4 );
- revbytes( &i, 4, 1 );
- flen += 4;
- *bp += 4;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ memcpy( &i, *bp, 4 );
+ revbytes( &i, 4, 1 );
+ flen += 4;
+ *bp += 4;
+ return i;
}
-unsigned char sgetU1( unsigned char **bp )
-{
- unsigned char c;
+unsigned char sgetU1( unsigned char **bp ){
+ unsigned char c;
- if ( flen == FLEN_ERROR ) return 0;
- c = **bp;
- flen += 1;
- (*bp)++;
- return c;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ c = **bp;
+ flen += 1;
+ ( *bp )++;
+ return c;
}
-unsigned short sgetU2( unsigned char **bp )
-{
- unsigned char *buf = *bp;
- unsigned short i;
+unsigned short sgetU2( unsigned char **bp ){
+ unsigned char *buf = *bp;
+ unsigned short i;
- if ( flen == FLEN_ERROR ) return 0;
- i = ( buf[ 0 ] << 8 ) | buf[ 1 ];
- flen += 2;
- *bp += 2;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ i = ( buf[ 0 ] << 8 ) | buf[ 1 ];
+ flen += 2;
+ *bp += 2;
+ return i;
}
-unsigned int sgetU4( unsigned char **bp )
-{
- unsigned int i;
+unsigned int sgetU4( unsigned char **bp ){
+ unsigned int i;
- if ( flen == FLEN_ERROR ) return 0;
- memcpy( &i, *bp, 4 );
- revbytes( &i, 4, 1 );
- flen += 4;
- *bp += 4;
- return i;
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+ memcpy( &i, *bp, 4 );
+ revbytes( &i, 4, 1 );
+ flen += 4;
+ *bp += 4;
+ return i;
}
-int sgetVX( unsigned char **bp )
-{
- unsigned char *buf = *bp;
- int i;
-
- if ( flen == FLEN_ERROR ) return 0;
-
- if ( buf[ 0 ] != 0xFF ) {
- i = buf[ 0 ] << 8 | buf[ 1 ];
- flen += 2;
- *bp += 2;
- }
- else {
- i = ( buf[ 1 ] << 16 ) | ( buf[ 2 ] << 8 ) | buf[ 3 ];
- flen += 4;
- *bp += 4;
- }
- return i;
+int sgetVX( unsigned char **bp ){
+ unsigned char *buf = *bp;
+ int i;
+
+ if ( flen == FLEN_ERROR ) {
+ return 0;
+ }
+
+ if ( buf[ 0 ] != 0xFF ) {
+ i = buf[ 0 ] << 8 | buf[ 1 ];
+ flen += 2;
+ *bp += 2;
+ }
+ else {
+ i = ( buf[ 1 ] << 16 ) | ( buf[ 2 ] << 8 ) | buf[ 3 ];
+ flen += 4;
+ *bp += 4;
+ }
+ return i;
}
-float sgetF4( unsigned char **bp )
-{
- float f;
+float sgetF4( unsigned char **bp ){
+ float f;
- if ( flen == FLEN_ERROR ) return 0.0f;
- memcpy( &f, *bp, 4 );
- revbytes( &f, 4, 1 );
- flen += 4;
- *bp += 4;
- return f;
+ if ( flen == FLEN_ERROR ) {
+ return 0.0f;
+ }
+ memcpy( &f, *bp, 4 );
+ revbytes( &f, 4, 1 );
+ flen += 4;
+ *bp += 4;
+ return f;
}
-char *sgetS0( unsigned char **bp )
-{
- char *s;
- unsigned char *buf = *bp;
- int len;
-
- if ( flen == FLEN_ERROR ) return NULL;
-
- len = strlen( buf ) + 1;
- if ( len == 1 ) {
- flen += 2;
- *bp += 2;
- return NULL;
- }
- len += len & 1;
- s = _pico_alloc( len );
- if ( !s ) {
- flen = FLEN_ERROR;
- return NULL;
- }
-
- memcpy( s, buf, len );
- flen += len;
- *bp += len;
- return s;
+char *sgetS0( unsigned char **bp ){
+ char *s;
+ unsigned char *buf = *bp;
+ int len;
+
+ if ( flen == FLEN_ERROR ) {
+ return NULL;
+ }
+
+ len = strlen( buf ) + 1;
+ if ( len == 1 ) {
+ flen += 2;
+ *bp += 2;
+ return NULL;
+ }
+ len += len & 1;
+ s = _pico_alloc( len );
+ if ( !s ) {
+ flen = FLEN_ERROR;
+ return NULL;
+ }
+
+ memcpy( s, buf, len );
+ flen += len;
+ *bp += len;
+ return s;
}
projects / xonotic / netradiant.git / blobdiff