mirror of
https://github.com/gnustep/libs-base.git
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302c691e79
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@4853 72102866-910b-0410-8b05-ffd578937521
421 lines
11 KiB
Objective-C
421 lines
11 KiB
Objective-C
/* Implementation of GNU Objective-C text stream object for use serializing
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Copyright (C) 1996 Free Software Foundation, Inc.
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Written by: Andrew Kachites McCallum <mccallum@gnu.ai.mit.edu>
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Written: Jan 1996
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This file is part of the GNUstep Base Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA.
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*/
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#include <config.h>
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#include <base/preface.h>
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#include <base/TextCStream.h>
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#include <base/NSString.h>
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#include <base/StdioStream.h>
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#include <Foundation/NSException.h>
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#define DEFAULT_FORMAT_VERSION 0
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static BOOL debug_textcoder = NO;
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@implementation TextCStream
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/* Encoding/decoding C values */
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#define XSTR(s) STR(s)
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#define STR(s) #s
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#define ATXSTR(s) ATSTR(s)
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#define ATSTR(s) @#s
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#define ROUND(V, A) \
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({ typeof(V) __v=(V); typeof(A) __a=(A); \
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__a*((__v+__a-1)/__a); })
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#define ENCODER_FORMAT(TYPE, CONVERSION) \
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@"%*s<%s> (" ATXSTR(TYPE) @") = %" ATXSTR(CONVERSION) @"\n"
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- (void) encodeValueOfCType: (const char*) type
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at: (const void*) d
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withName: (NSString*) name;
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{
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if (!type)
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[NSException raise:NSInvalidArgumentException format:@"type is NULL"];
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NSAssert(*type != '@', @"tried to encode an \"ObjC\" type");
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NSAssert(*type != '^', @"tried to encode an \"ObjC\" type");
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NSAssert(*type != ':', @"tried to encode an \"ObjC\" type");
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if (!name || [name length] == 0)
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name = @"Anonymous";
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switch (*type)
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{
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case _C_LNG:
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[stream writeFormat:@"%*s<%s> (long) = %ld\n",
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indentation, "", [name cString], *(long*)d];
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break;
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case _C_ULNG:
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[stream writeFormat:@"%*s<%s> (unsigned long) = %lu\n",
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indentation, "", [name cString], *(unsigned long*)d];
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break;
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case _C_INT:
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[stream writeFormat:@"%*s<%s> (int) = %d\n",
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indentation, "", [name cString], *(int*)d];
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break;
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case _C_UINT:
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[stream writeFormat:@"%*s<%s> (unsigned int) = %u\n",
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indentation, "", [name cString], *(unsigned int*)d];
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break;
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case _C_SHT:
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[stream writeFormat:@"%*s<%s> (short) = %d\n",
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indentation, "", [name cString], (int)*(short*)d];
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break;
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case _C_USHT:
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[stream writeFormat:@"%*s<%s> (unsigned short) = %u\n",
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indentation, "", [name cString],
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(unsigned)*(unsigned short*)d];
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break;
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case _C_CHR:
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[stream writeFormat:@"%*s<%s> (char) = %c (0x%x)\n",
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indentation, "", [name cString],
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*(char*)d, (unsigned)*(char*)d];
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break;
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case _C_UCHR:
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[stream writeFormat:@"%*s<%s> (unsigned char) = 0x%x\n",
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indentation, "", [name cString],
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(unsigned)*(unsigned char*)d];
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break;
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case _C_FLT:
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[stream writeFormat:@"%*s<%s> (float) = %g\n",
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indentation, "", [name cString], *(float*)d];
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break;
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case _C_DBL:
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[stream writeFormat:@"%*s<%s> (double) = %g\n",
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indentation, "", [name cString], *(double*)d];
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break;
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case _C_CHARPTR:
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[stream writeFormat:@"%*s<%s> (char*) = \"%s\"\n",
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indentation, "", [name cString], *(char**)d];
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break;
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case _C_ARY_B:
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{
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int len = atoi (type+1); /* xxx why +1 ? */
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int offset;
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while (isdigit(*++type));
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offset = objc_sizeof_type(type);
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[self encodeName:name];
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[self encodeIndent];
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while (len-- > 0)
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{
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/* Change this so we don't re-write type info every time. */
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[self encodeValueOfCType:type
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at:d
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withName:@"array component"];
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((char*)d) += offset;
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}
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[self encodeUnindent];
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break;
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}
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case _C_STRUCT_B:
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{
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int acc_size = 0;
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int align;
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while (*type != _C_STRUCT_E && *type++ != '='); /* skip "<name>=" */
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[self encodeName:name];
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[self encodeIndent];
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while (*type != _C_STRUCT_E)
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{
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align = objc_alignof_type (type); /* pad to alignment */
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acc_size = ROUND (acc_size, align);
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[self encodeValueOfCType:type
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at:((char*)d)+acc_size
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withName:@"structure component"];
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acc_size += objc_sizeof_type (type); /* add component size */
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type = objc_skip_typespec (type); /* skip component */
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}
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[self encodeUnindent];
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break;
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}
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case _C_PTR:
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[NSException raise: NSGenericException
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format: @"Cannot encode pointers"];
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break;
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#if 0 /* No, don't know how far to recurse */
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[self encodeValueOfObjCType:type+1 at:*(char**)d withName:name];
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break;
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#endif
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default:
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[NSException raise: NSGenericException
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format: @"type %s not implemented", type];
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}
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}
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#define DECODER_FORMAT(TYPE, CONVERSION) \
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@" <%a[^>]> (" ATXSTR(TYPE) @") = %" ATXSTR(CONVERSION) @" \n"
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#define DECODE_ERROR(TYPE) \
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{ \
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id line = [stream readLine]; \
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[NSException raise: NSGenericException \
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format: @"bad format decoding " ATXSTR(TYPE) @".\n" \
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@"Looking at %s\n.", \
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[line cString]]; \
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}
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#define DECODE_DEBUG(TYPE, CONVERSION) \
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if (debug_textcoder) \
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[[StdioStream standardError] writeFormat: \
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@"got <%s> (%s) %" ATXSTR(CONVERSION) @"\n", \
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tmpname, \
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XSTR(TYPE), *(TYPE*)d];
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- (void) decodeValueOfCType: (const char*) type
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at: (void*) d
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withName: (NSString* *) namePtr;
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{
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char *tmpname;
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if (!type)
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[NSException raise:NSInvalidArgumentException format:@"type is NULL"];
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if (!d)
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[NSException raise:NSInvalidArgumentException format:@"d is NULL"];
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NSAssert(*type != '@', @"tried to decode an \"ObjC\" type");
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NSAssert(*type != '^', @"tried to decode an \"ObjC\" type");
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NSAssert(*type != ':', @"tried to decode an \"ObjC\" type");
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switch (*type)
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{
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case _C_LNG:
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if ([stream readFormat: DECODER_FORMAT(long,l),
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&tmpname, (long*)d] != 2)
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DECODE_ERROR(long);
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DECODE_DEBUG(long, l);
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break;
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case _C_ULNG:
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if ([stream readFormat:DECODER_FORMAT(unsigned long, lu),
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&tmpname, (unsigned long*)d] != 2)
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DECODE_ERROR(unsigned long);
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DECODE_DEBUG(unsigned long, lu);
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break;
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case _C_INT:
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if ([stream readFormat:DECODER_FORMAT(int, d),
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&tmpname, (int*)d] != 2)
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DECODE_ERROR(int);
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DECODE_DEBUG(int, d);
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break;
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case _C_UINT:
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if ([stream readFormat:DECODER_FORMAT(unsigned int,u),
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&tmpname, (unsigned int*)d] != 2)
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DECODE_ERROR(unsigned int);
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DECODE_DEBUG(unsigned int, u);
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break;
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case _C_SHT:
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if ([stream readFormat:DECODER_FORMAT(short,hd),
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&tmpname, (short*)d] != 2)
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DECODE_ERROR(short);
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DECODE_DEBUG(short, d);
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break;
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case _C_USHT:
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if ([stream readFormat:DECODER_FORMAT(unsigned short,hu),
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&tmpname, (unsigned short*)d] != 2)
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DECODE_ERROR(unsigned short);
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DECODE_DEBUG(unsigned short, u);
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break;
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case _C_CHR:
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{
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unsigned tmp;
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if ([stream readFormat:@" <%a[^>]> (char) = %*c (%x) \n",
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&tmpname, &tmp] != 2)
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DECODE_ERROR(char);
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*(char*)d = (char)tmp;
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DECODE_DEBUG(char, c);
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break;
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}
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case _C_UCHR:
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{
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unsigned tmp;
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if ([stream readFormat:DECODER_FORMAT(unsigned char,x),
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&tmpname, &tmp] != 2)
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DECODE_ERROR(unsigned char);
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*(unsigned char*)d = (unsigned char)tmp;
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DECODE_DEBUG(unsigned char, c);
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break;
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}
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case _C_FLT:
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if ([stream readFormat:DECODER_FORMAT(float,f),
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&tmpname, (float*)d] != 2)
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DECODE_ERROR(float);
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DECODE_DEBUG(float, f);
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break;
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case _C_DBL:
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if ([stream readFormat:DECODER_FORMAT(double,lf),
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&tmpname, (double*)d] != 2)
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DECODE_ERROR(double);
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DECODE_DEBUG(double, f);
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break;
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case _C_CHARPTR:
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if ([stream readFormat:@" <%a[^>]> (char*) = \"%a[^\"]\" \n",
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&tmpname, (char**)d] != 2)
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DECODE_ERROR(char*);
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DECODE_DEBUG(char*, s);
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break;
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case _C_ARY_B:
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{
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/* xxx Do we need to allocate space, just like _C_CHARPTR ? */
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int len = atoi(type+1);
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int offset;
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[self decodeName:namePtr];
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[self decodeIndent];
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while (isdigit(*++type));
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offset = objc_sizeof_type(type);
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while (len-- > 0)
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{
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[self decodeValueOfCType:type
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at:d
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withName:namePtr];
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((char*)d) += offset;
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}
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[self decodeUnindent];
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break;
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}
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case _C_STRUCT_B:
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{
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/* xxx Do we need to allocate space just like char* ? No. */
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int acc_size = 0;
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int align;
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while (*type != _C_STRUCT_E && *type++ != '='); /* skip "<name>=" */
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[self decodeName:namePtr];
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[self decodeIndent]; /* xxx insert [self decodeName:] */
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while (*type != _C_STRUCT_E)
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{
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align = objc_alignof_type (type); /* pad to alignment */
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acc_size = ROUND (acc_size, align);
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[self decodeValueOfCType:type
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at:((char*)d)+acc_size
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withName:namePtr];
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acc_size += objc_sizeof_type (type); /* add component size */
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type = objc_skip_typespec (type); /* skip component */
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}
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[self decodeUnindent];
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break;
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}
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case _C_PTR:
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[NSException raise: NSGenericException
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format: @"Cannot decode pointers"];
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break;
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#if 0 /* No, don't know how far to recurse */
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OBJC_MALLOC(*(void**)d, void*, 1);
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[self decodeValueOfObjCType:type+1 at:*(char**)d withName:namePtr];
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break;
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#endif
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default:
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[NSException raise: NSGenericException
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format: @"type %s not yet implemented", type];
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}
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if (namePtr)
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*namePtr = [[[NSString alloc] initWithCStringNoCopy: tmpname
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length: strlen (tmpname)
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freeWhenDone: YES]
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autorelease];
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else
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objc_free (tmpname);
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}
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/* Encoding/decoding indentation */
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- (void) encodeIndent
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{
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[stream writeFormat: @"%*s {\n", indentation, ""];
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indentation += 2;
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}
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- (void) encodeUnindent
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{
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indentation -= 2;
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[stream writeFormat: @"%*s }\n", indentation, ""];
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}
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- (void) decodeIndent
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{
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id line;
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const char *lp;
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line = [stream readLine];
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lp = [line cString];
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while (*lp == ' ') lp++;
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if (*lp != '{')
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[NSException raise: NSGenericException
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format: @"bad indent format, got \"%s\"", line];
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}
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- (void) decodeUnindent
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{
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id line;
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const char *lp;
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line = [stream readLine];
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lp = [line cString];
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while (*lp == ' ') lp++;
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if (*lp != '}')
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[NSException raise: NSGenericException
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format: @"bad unindent format, got \"%s\"", line];
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}
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- (void) encodeName: (NSString*) n
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{
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if (n)
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[stream writeFormat:@"%*s<%s>\n", indentation, "", [n cString]];
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else
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[stream writeFormat:@"%*s<NULL>\n", indentation, ""];
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}
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- (void) decodeName: (NSString* *) name
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{
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char *n;
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if (name)
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{
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if ([stream readFormat: @" <%a[^>]> \n", &n] != 1)
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[NSException raise: NSGenericException
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format: @"bad format"];
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*name = [[[NSString alloc] initWithCStringNoCopy: n
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length: strlen (n)
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freeWhenDone: YES]
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autorelease];
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if (debug_textcoder)
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fprintf(stderr, "got name <%s>\n", n);
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}
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else
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{
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[stream readFormat: @" <%*[^>]> \n"];
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}
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}
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/* Returning default format version. */
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+ (int) defaultFormatVersion
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{
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return DEFAULT_FORMAT_VERSION;
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}
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@end
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