87 lines
1.5 KiB
C
87 lines
1.5 KiB
C
/*
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* fdopen - convert a (UNIX) file descriptor into a FILE pointer
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*/
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/* $Id$ */
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#include <stdio.h>
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#include <stdlib.h>
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#if ACKCONF_WANT_O_TEXT_O_BINARY
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#include <unistd.h>
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#include <fcntl.h>
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#endif
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#if ACKCONF_WANT_STDIO && ACKCONF_WANT_EMULATED_FILE
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FILE* fdopen(int fd, const char* mode)
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{
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register int i;
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FILE* stream;
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int flags = 0;
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if (fd < 0)
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return (FILE*)NULL;
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for (i = 0; __iotab[i] != 0; i++)
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if (i >= FOPEN_MAX - 1)
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return (FILE*)NULL;
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switch (*mode++)
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{
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case 'r':
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flags |= _IOREAD | _IOREADING;
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break;
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case 'a':
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flags |= _IOAPPEND;
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case 'w':
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flags |= _IOWRITE | _IOWRITING;
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break;
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default:
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return (FILE*)NULL;
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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':
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#if ACKCONF_WANT_O_TEXT_O_BINARY
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flags |= _IOBINARY;
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#endif
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continue;
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case '+':
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flags |= _IOREAD | _IOWRITE;
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continue;
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/* The sequence may be followed by aditional characters */
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default:
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break;
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}
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break;
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}
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if ((stream = (FILE*)malloc(sizeof(FILE))) == NULL)
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{
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return (FILE*)NULL;
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}
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if ((flags & _IOREAD) && (flags & _IOWRITE))
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flags &= ~(_IOREADING | _IOWRITING);
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#if ACKCONF_WANT_O_TEXT_O_BINARY
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{
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/*
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* FIXME: this assumes that any platform that has O_TEXT and
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* O_BINARY will also have a _setmode() function.
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*/
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extern int _setmode(int, int);
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_setmode(fd, (flags & _IOBINARY) ? O_BINARY : O_TEXT);
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}
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#endif
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stream->_count = 0;
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stream->_fd = fd;
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stream->_flags = flags;
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stream->_buf = NULL;
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__iotab[i] = stream;
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return stream;
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}
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#endif
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