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 int sgReadError (void) { return read_error ; }
32 int sgWriteError (void) { return write_error ; }
35 void sgReadChar ( gzFile fd, char *var )
37 if ( gzread ( fd, var, sizeof(char) ) == 1 ) return ;
42 void sgWriteChar ( gzFile fd, const char var )
44 if ( gzwrite ( fd, (void *)(&var), sizeof(char) ) == 1 ) return ;
49 void sgReadFloat ( gzFile fd, float *var )
51 if ( gzread ( fd, var, sizeof(float) ) == 1 ) return ;
56 void sgWriteFloat ( gzFile fd, const float var )
58 if ( gzwrite ( fd, (void *)(&var), sizeof(float) ) == 1 ) return ;
63 void sgReadDouble ( gzFile fd, double *var )
65 if ( gzread ( fd, var, sizeof(double) ) == 1 ) return ;
70 void sgWriteDouble ( gzFile fd, const double var )
72 if ( gzwrite ( fd, (void *)(&var), sizeof(double) ) == 1 ) return ;
77 void sgReadUInt ( gzFile fd, unsigned int *var )
79 if ( gzread ( fd, var, sizeof(unsigned int) ) == 1 ) return ;
84 void sgWriteUInt ( gzFile fd, const unsigned int var )
86 if ( gzwrite ( fd, (void *)(&var), sizeof(unsigned int) ) == 1 ) return ;
91 void sgReadInt ( gzFile fd, int *var )
93 if ( gzread ( fd, var, sizeof(int) ) == 1 ) return ;
98 void sgWriteInt ( gzFile fd, const int var )
100 if ( gzwrite ( fd, (void *)(&var), sizeof(int) ) == 1 ) return ;
105 void sgReadLong ( gzFile fd, long int *var )
107 if ( gzread ( fd, var, sizeof(long int) ) == 1 ) return ;
112 void sgWriteLong ( gzFile fd, const long int var )
114 if ( gzwrite ( fd, (void *)(&var), sizeof(long int) ) == 1 ) return ;
119 void sgReadUShort ( gzFile fd, unsigned short *var )
121 if ( gzread ( fd, var, sizeof(unsigned short) ) == 1 ) return ;
126 void sgWriteUShort ( gzFile fd, const unsigned short var )
128 if ( gzwrite ( fd, (void *)(&var), sizeof(unsigned short) ) == 1 ) return ;
133 void sgReadShort ( gzFile fd, short *var )
135 if ( gzread ( fd, var, sizeof(short) ) == 1 ) return ;
140 void sgWriteShort ( gzFile fd, const short var )
142 if ( gzwrite ( fd, (void *)(&var), sizeof(short) ) == 1 ) return ;
147 void sgReadFloat ( gzFile fd, const unsigned int n, float *var )
149 if ( gzread ( fd, var, sizeof(float) * n ) == (int)n ) return ;
154 void sgWriteFloat ( gzFile fd, const unsigned int n, const float *var )
156 if ( gzwrite ( fd, (void *)var, sizeof(float) * n ) == (int)n ) return ;
160 void sgReadDouble ( gzFile fd, const unsigned int n, double *var )
162 if ( gzread ( fd, var, sizeof(double) * n ) == (int)n ) return ;
167 void sgWriteDouble ( gzFile fd, const unsigned int n, const double *var )
169 if ( gzwrite ( fd, (void *)var, sizeof(double) * n ) == (int)n ) return ;
173 void sgReadBytes ( gzFile fd, const unsigned int n, void *var )
177 if ( gzread ( fd, var, n ) == 1 )
182 void sgWriteBytes ( gzFile fd, const unsigned int n, const void *var )
186 if ( gzwrite ( fd, (void *)var, n ) == 1 )
192 void sgReadUShort ( gzFile fd, const unsigned int n, unsigned short *var )
194 if ( gzread ( fd, var, sizeof(unsigned short) * n ) == (int)n ) return ;
199 void sgWriteUShort ( gzFile fd, const unsigned int n, const unsigned short *var )
201 if ( gzwrite ( fd, (void *)var, sizeof(unsigned short) * n ) == (int)n ) return ;
207 void sgReadShort ( gzFile fd, const unsigned int n, short *var )
209 if ( gzread ( fd, var, sizeof(short) * n ) == (int)n ) return ;
214 void sgWriteShort ( gzFile fd, const unsigned int n, const short *var )
216 if ( gzwrite ( fd, (void *)var, sizeof(short) * n ) == (int)n ) return ;
221 void sgReadUInt ( gzFile fd, const unsigned int n, unsigned int *var )
223 if ( gzread ( fd, var, sizeof(unsigned int)* n ) == (int)n ) return ;
228 void sgWriteUInt ( gzFile fd, const unsigned int n, const unsigned int *var )
230 if ( gzwrite ( fd, (void *)var, sizeof(unsigned int) * n ) == (int)n ) return ;
236 void sgReadInt ( gzFile fd, const unsigned int n, int *var )
238 if ( gzread ( fd, var, sizeof(int) * n ) == (int)n ) return ;
243 void sgWriteInt ( gzFile fd, const unsigned int n, const int *var )
245 if ( gzwrite ( fd, (void *)var, sizeof(int) * n ) == (int)n ) return ;
251 #define MAX_ENTITY_NAME_LENGTH 1024
253 void sgReadString ( gzFile fd, char **var )
256 char s [ MAX_ENTITY_NAME_LENGTH ] ;
258 for ( i = 0 ; i < MAX_ENTITY_NAME_LENGTH ; i++ )
260 int c = gzgetc ( fd ) ;
267 if ( i >= MAX_ENTITY_NAME_LENGTH-1 )
268 s [ MAX_ENTITY_NAME_LENGTH-1 ] = '\0' ;
275 *var = new char [ strlen(s)+1 ] ;
281 void sgWriteString ( gzFile fd, const char *var )
284 if ( gzwrite ( fd, (void *)var, strlen(var) + 1 ) ==
285 (int)(strlen(var) + 1) )
293 void sgReadVec2 ( gzFile fd, sgVec2 var ) { sgReadFloat ( fd, 2, var ) ; }
294 void sgWriteVec2 ( gzFile fd, const sgVec2 var ) { sgWriteFloat ( fd, 2, var ) ; }
296 void sgReadVec3 ( gzFile fd, sgVec3 var ) { sgReadFloat ( fd, 3, var ) ; }
297 void sgWriteVec3 ( gzFile fd, const sgVec3 var ) { sgWriteFloat ( fd, 3, var ) ; }
299 void sgReaddVec3 ( gzFile fd, sgdVec3 var ) { sgReadDouble ( fd, 3, var ) ; }
300 void sgWritedVec3 ( gzFile fd, const sgdVec3 var ) { sgWriteDouble ( fd, 3, var ) ; }
302 void sgReadVec4 ( gzFile fd, sgVec4 var ) { sgReadFloat ( fd, 4, var ) ; }
303 void sgWriteVec4 ( gzFile fd, const sgVec4 var ) { sgWriteFloat ( fd, 4, var ) ; }
305 void sgReadMat4 ( gzFile fd, sgMat4 var ) { sgReadFloat ( fd, 16, (float *)var ) ; }
306 void sgWriteMat4 ( gzFile fd, const sgMat4 var ) { sgWriteFloat ( fd, 16, (float *)var ) ; }