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/* Implementation of TLFILEStream class.
This file is part of TL, Tiggr's Library.
Written by Tiggr <tiggr@es.ele.tue.nl>
Copyright (C) 1995, 1996 Pieter J. Schoenmakers
TL is distributed WITHOUT ANY WARRANTY.
See the file LICENSE in the TL distribution for details.
$Id: TLFILEStream.m,v 1.1 1998/01/08 16:11:35 tiggr Exp $ */
#import "tl/support.h"
#import "tl/TLFILEStream.h"
#import "tl/TLString.h"
#import "tl/TLPatchedRoots.h"
#import <string.h>
id <TLInputStream> V_stdin_;
id <TLOutputStream> V_stdout_;
id <TLInputOutputStream> V_stderr_;
@implementation TLFILEStream
+init
{
if (!V_stdin_)
{
V_stdin_ = [self mutableStreamWithFILE: stdin];
V_stdout_ = [self mutableStreamWithFILE: stdout];
V_stderr_ = [self mutableStreamWithFILE: stderr];
}
return (self);
} /* +init */
+(id <TLStream>) streamWithFILE: (FILE *) an_f
{
return ([[self gcAlloc] initWithFILE: an_f]);
} /* -streamWithFILE: */
+(id <TLMutableStream>) mutableStreamWithFILE: (FILE *) an_f
{
return ([[self gcAlloc] initWithFILE: an_f]);
} /* -mutableStreamWithFILE: */
+(id <TLStream>) streamWithFileNamed: (id <TLString>) name
{
FILE *af = fopen ([name cString], "r");
if (!af)
{
[self warning: "open %#: %s", name, ERRMSG];
return (nil);
}
return ([self streamWithFILE: af]);
} /* +streamWithFileNamed: */
+(id <TLStream>) streamWithFileNamed: (id <TLString>) name
alongPath: (TLCons *) in_path
{
TLCons *dir, *path = in_path;
TLString *filename;
FILE *af;
if (!path || [[name string] fileExistsP])
return ([self streamWithFileNamed: name]);
while (path)
{
DECONS (path, dir, path);
filename = [CO_TLString stringWithFormat: @"%@/%@", dir, name];
af = fopen ([filename cString], "r");
if (af)
return ([self streamWithFILE: af]);
}
[self warning: "file %# not found along %#", name, in_path];
return (nil);
} /* +streamWithFileNamed:alongPath: */
+(id <TLMutableStream>) mutableStreamWithFileNamed: (id <TLString>) name
{
const char *s = [name cString];
FILE *af = fopen (s, "w+");
if (!af)
{
[self warning: "open %#: %s", name, ERRMSG];
return (nil);
}
return ([self mutableStreamWithFILE: af]);
} /* +mutableStreamWithFileNamed: */
-initWithFILE: (FILE *) an_f
{
f = an_f;
return (self);
} /* -initWithFILE: */
-(void) print: (id <TLMutableStream>) s quoted: (BOOL) qp
{
formac (s, @"#<%s %p on %p fd=%d eof=%d error=%d>",
class_get_class_name (isa), self, f,
f ? fileno (f) : 0, f ? feof (f) : 0, f ? ferror(f) : 0);
} /* -print:quoted: */
/******************** TLStream ********************/
-close
{
FILE *file = f;
f = NULL;
return (fclose (file) ? nil : self);
} /* -fclose */
-(int) fileDescriptor
{
return (f ? fileno (f) : -1);
} /* -fileDescriptor */
-streamp
{
return (self);
} /* -streamp */
/******************** TLInputStream ********************/
-flushInput
{
/* We don't do flush input, because of the horrible semantics of
read/write FILEs. */
return (self);
} /* -flushInput */
-(int) readByte
{
return (getc (f));
} /* -readByte */
-(int) readBytes: (int) n intoBuffer: (char *) b
{
return (fread (b, 1, n, f));
} /* -readBytes:intoBuffer: */
/******************** TLOutputStream ********************/
-flushOutput
{
return (fflush (f) ? nil : self);
} /* -flushOutput */
-(int) writeByte: (char) c
{
return (putc (c, f));
} /* -writeByte: */
-(int) writeBytes: (int) n fromBuffer: (const char *) b
{
return (fwrite (b, 1, n, f));
} /* -writeBytes:fromBuffer: */
/******************** TLMutableStream ********************/
-(long) _tell
{
return (ftell (f));
} /* -_tell */
-(long) _seek: (long) offset from: (int) pos
{
int r;
switch (pos)
{
case TLSEEK_ABSOLUTE: r = SEEK_SET; break;
case TLSEEK_FROM_END: r = SEEK_END; break;
case TLSEEK_RELATIVE: r = SEEK_CUR; break;
default: [self error: "bad TLSEEK %d", pos]; r = 0; break;
}
return (fseek (f, offset, r));
} /* -_seek:from: */
@end
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