55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2014.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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stdio/fparsemode.c
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Parses the mode argument of functions like fopen().
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*******************************************************************************/
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#include <errno.h>
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#include <stdio.h>
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int fparsemode(const char* mode)
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{
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int result;
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switch ( *mode++ )
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{
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case 'r': result = FILE_MODE_READ; break;
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case 'w': result = FILE_MODE_WRITE | FILE_MODE_CREATE | FILE_MODE_TRUNCATE; break;
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case 'a': result = FILE_MODE_WRITE | FILE_MODE_CREATE | FILE_MODE_APPEND; break;
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default: return errno = EINVAL, -1;
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};
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while ( *mode )
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{
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switch ( *mode++ )
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{
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case 'b': result |= FILE_MODE_BINARY; break;
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case 'e': result |= FILE_MODE_CLOEXEC; break;
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case 't': result &= ~FILE_MODE_BINARY; break;
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case 'x': result |= FILE_MODE_EXCL; break;
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case '+': result |= FILE_MODE_READ | FILE_MODE_WRITE; break;
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default: return errno = EINVAL, -1;
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};
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}
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return result;
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}
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