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-rw-r--r--common.cc149
1 files changed, 149 insertions, 0 deletions
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+/* Tarlz - Archiver with multimember lzip compression
+ Copyright (C) 2013-2019 Antonio Diaz Diaz.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <cctype>
+#include <cerrno>
+#include <climits>
+#include <cstdlib>
+#include <cstring>
+#include <string>
+#include <vector>
+#include <pthread.h>
+#include <stdint.h>
+#include <unistd.h>
+
+#include "tarlz.h"
+
+
+void xinit_mutex( pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_mutex_init( mutex, 0 );
+ if( errcode )
+ { show_error( "pthread_mutex_init", errcode ); cleanup_and_fail(); }
+ }
+
+void xinit_cond( pthread_cond_t * const cond )
+ {
+ const int errcode = pthread_cond_init( cond, 0 );
+ if( errcode )
+ { show_error( "pthread_cond_init", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xdestroy_mutex( pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_mutex_destroy( mutex );
+ if( errcode )
+ { show_error( "pthread_mutex_destroy", errcode ); cleanup_and_fail(); }
+ }
+
+void xdestroy_cond( pthread_cond_t * const cond )
+ {
+ const int errcode = pthread_cond_destroy( cond );
+ if( errcode )
+ { show_error( "pthread_cond_destroy", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xlock( pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_mutex_lock( mutex );
+ if( errcode )
+ { show_error( "pthread_mutex_lock", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xunlock( pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_mutex_unlock( mutex );
+ if( errcode )
+ { show_error( "pthread_mutex_unlock", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xwait( pthread_cond_t * const cond, pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_cond_wait( cond, mutex );
+ if( errcode )
+ { show_error( "pthread_cond_wait", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xsignal( pthread_cond_t * const cond )
+ {
+ const int errcode = pthread_cond_signal( cond );
+ if( errcode )
+ { show_error( "pthread_cond_signal", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xbroadcast( pthread_cond_t * const cond )
+ {
+ const int errcode = pthread_cond_broadcast( cond );
+ if( errcode )
+ { show_error( "pthread_cond_broadcast", errcode ); cleanup_and_fail(); }
+ }
+
+
+unsigned long long parse_octal( const uint8_t * const ptr, const int size )
+ {
+ unsigned long long result = 0;
+ int i = 0;
+ while( i < size && std::isspace( ptr[i] ) ) ++i;
+ for( ; i < size && ptr[i] >= '0' && ptr[i] <= '7'; ++i )
+ { result <<= 3; result += ptr[i] - '0'; }
+ return result;
+ }
+
+
+/* Returns the number of bytes really read.
+ If (returned value < size) and (errno == 0), means EOF was reached.
+*/
+int readblock( const int fd, uint8_t * const buf, const int size )
+ {
+ int sz = 0;
+ errno = 0;
+ while( sz < size )
+ {
+ const int n = read( fd, buf + sz, size - sz );
+ if( n > 0 ) sz += n;
+ else if( n == 0 ) break; // EOF
+ else if( errno != EINTR ) break;
+ errno = 0;
+ }
+ return sz;
+ }
+
+
+/* Returns the number of bytes really written.
+ If (returned value < size), it is always an error.
+*/
+int writeblock( const int fd, const uint8_t * const buf, const int size )
+ {
+ int sz = 0;
+ errno = 0;
+ while( sz < size )
+ {
+ const int n = write( fd, buf + sz, size - sz );
+ if( n > 0 ) sz += n;
+ else if( n < 0 && errno != EINTR ) break;
+ errno = 0;
+ }
+ return sz;
+ }