1 // lowlevel.hxx -- routines to handle lowlevel compressed binary IO of
4 // Shamelessly adapted from plib (plib.sourceforge.net) January 2001
6 // Original version Copyright (C) 2000 the plib team
7 // Local changes Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 2 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "lowlevel.hxx"
28 static int read_error = false ;
29 static int write_error = false ;
31 void sgClearReadError() { read_error = false; }
32 void sgClearWriteError() { write_error = false; }
33 int sgReadError() { return read_error ; }
34 int sgWriteError() { return write_error ; }
37 void sgReadChar ( gzFile fd, char *var )
39 if ( gzread ( fd, var, sizeof(char) ) > 0 ) return ;
44 void sgWriteChar ( gzFile fd, const char var )
46 if ( gzwrite ( fd, (void *)(&var), sizeof(char) ) > 0 ) return ;
51 void sgReadFloat ( gzFile fd, float *var )
53 if ( gzread ( fd, var, sizeof(float) ) > 0 ) return ;
58 void sgWriteFloat ( gzFile fd, const float var )
60 if ( gzwrite ( fd, (void *)(&var), sizeof(float) ) > 0 ) return ;
65 void sgReadDouble ( gzFile fd, double *var )
67 if ( gzread ( fd, var, sizeof(double) ) > 0 ) return ;
72 void sgWriteDouble ( gzFile fd, const double var )
74 if ( gzwrite ( fd, (void *)(&var), sizeof(double) ) > 0 ) return ;
79 void sgReadUInt ( gzFile fd, unsigned int *var )
81 if ( gzread ( fd, var, sizeof(unsigned int) ) > 0 ) return ;
86 void sgWriteUInt ( gzFile fd, const unsigned int var )
88 if ( gzwrite ( fd, (void *)(&var), sizeof(unsigned int) ) > 0 ) return ;
93 void sgReadInt ( gzFile fd, int *var )
95 if ( gzread ( fd, var, sizeof(int) ) > 0 ) return ;
100 void sgWriteInt ( gzFile fd, const int var )
102 if ( gzwrite ( fd, (void *)(&var), sizeof(int) ) > 0 ) return ;
107 void sgReadLong ( gzFile fd, long int *var )
109 if ( gzread ( fd, var, sizeof(long int) ) > 0 ) return ;
114 void sgWriteLong ( gzFile fd, const long int var )
116 if ( gzwrite ( fd, (void *)(&var), sizeof(long int) ) > 0 ) return ;
121 void sgReadUShort ( gzFile fd, unsigned short *var )
123 if ( gzread ( fd, var, sizeof(unsigned short) ) > 0 ) return ;
128 void sgWriteUShort ( gzFile fd, const unsigned short var )
130 if ( gzwrite ( fd, (void *)(&var), sizeof(unsigned short) ) > 0 ) return ;
135 void sgReadShort ( gzFile fd, short *var )
137 if ( gzread ( fd, var, sizeof(short) ) > 0 ) return ;
142 void sgWriteShort ( gzFile fd, const short var )
144 if ( gzwrite ( fd, (void *)(&var), sizeof(short) ) > 0 ) return ;
149 void sgReadFloat ( gzFile fd, const unsigned int n, float *var )
151 if ( gzread ( fd, var, sizeof(float) * n ) == (int)n ) return ;
156 void sgWriteFloat ( gzFile fd, const unsigned int n, const float *var )
158 if ( gzwrite ( fd, (void *)var, sizeof(float) * n ) == (int)n ) return ;
162 void sgReadDouble ( gzFile fd, const unsigned int n, double *var )
164 if ( gzread ( fd, var, sizeof(double) * n ) == (int)n ) return ;
169 void sgWriteDouble ( gzFile fd, const unsigned int n, const double *var )
171 if ( gzwrite ( fd, (void *)var, sizeof(double) * n ) == (int)n ) return ;
175 void sgReadBytes ( gzFile fd, const unsigned int n, void *var )
179 if ( gzread ( fd, var, n ) > 0 )
184 void sgWriteBytes ( gzFile fd, const unsigned int n, const void *var )
188 if ( gzwrite ( fd, (void *)var, n ) > 0 )
194 void sgReadUShort ( gzFile fd, const unsigned int n, unsigned short *var )
196 if ( gzread ( fd, var, sizeof(unsigned short) * n ) == (int)n ) return ;
201 void sgWriteUShort ( gzFile fd, const unsigned int n, const unsigned short *var )
203 if ( gzwrite ( fd, (void *)var, sizeof(unsigned short) * n ) == (int)n ) return ;
209 void sgReadShort ( gzFile fd, const unsigned int n, short *var )
211 if ( gzread ( fd, var, sizeof(short) * n ) == (int)n ) return ;
216 void sgWriteShort ( gzFile fd, const unsigned int n, const short *var )
218 if ( gzwrite ( fd, (void *)var, sizeof(short) * n ) == (int)n ) return ;
223 void sgReadUInt ( gzFile fd, const unsigned int n, unsigned int *var )
225 if ( gzread ( fd, var, sizeof(unsigned int)* n ) == (int)n ) return ;
230 void sgWriteUInt ( gzFile fd, const unsigned int n, const unsigned int *var )
232 if ( gzwrite ( fd, (void *)var, sizeof(unsigned int) * n ) == (int)n ) return ;
238 void sgReadInt ( gzFile fd, const unsigned int n, int *var )
240 if ( gzread ( fd, var, sizeof(int) * n ) == (int)n ) return ;
245 void sgWriteInt ( gzFile fd, const unsigned int n, const int *var )
247 if ( gzwrite ( fd, (void *)var, sizeof(int) * n ) == (int)n ) return ;
253 #define MAX_ENTITY_NAME_LENGTH 1024
255 void sgReadString ( gzFile fd, char **var )
258 char s [ MAX_ENTITY_NAME_LENGTH ] ;
260 for ( i = 0 ; i < MAX_ENTITY_NAME_LENGTH ; i++ )
262 int c = gzgetc ( fd ) ;
269 if ( i >= MAX_ENTITY_NAME_LENGTH-1 )
270 s [ MAX_ENTITY_NAME_LENGTH-1 ] = '\0' ;
277 *var = new char [ strlen(s)+1 ] ;
283 void sgWriteString ( gzFile fd, const char *var )
286 if ( gzwrite ( fd, (void *)var, strlen(var) + 1 ) ==
287 (int)(strlen(var) + 1) )
295 void sgReadVec2 ( gzFile fd, sgVec2 var ) { sgReadFloat ( fd, 2, var ) ; }
296 void sgWriteVec2 ( gzFile fd, const sgVec2 var ) { sgWriteFloat ( fd, 2, var ) ; }
298 void sgReadVec3 ( gzFile fd, sgVec3 var ) { sgReadFloat ( fd, 3, var ) ; }
299 void sgWriteVec3 ( gzFile fd, const sgVec3 var ) { sgWriteFloat ( fd, 3, var ) ; }
301 void sgReaddVec3 ( gzFile fd, sgdVec3 var ) { sgReadDouble ( fd, 3, var ) ; }
302 void sgWritedVec3 ( gzFile fd, const sgdVec3 var ) { sgWriteDouble ( fd, 3, var ) ; }
304 void sgReadVec4 ( gzFile fd, sgVec4 var ) { sgReadFloat ( fd, 4, var ) ; }
305 void sgWriteVec4 ( gzFile fd, const sgVec4 var ) { sgWriteFloat ( fd, 4, var ) ; }
307 void sgReadMat4 ( gzFile fd, sgMat4 var ) { sgReadFloat ( fd, 16, (float *)var ) ; }
308 void sgWriteMat4 ( gzFile fd, const sgMat4 var ) { sgWriteFloat ( fd, 16, (float *)var ) ; }