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Merge pull request #1360 from rainers/vs2015_weak
Alternative support for VS2015 C runtime
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| Original file line number | Diff line number | Diff line change |
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| /** | ||
| * This module provides MS VC runtime helper function that | ||
| * wrap differences between different versions of the MS C runtime | ||
| * | ||
| * Copyright: Copyright Digital Mars 2015. | ||
| * License: Distributed under the | ||
| * $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0). | ||
| * (See accompanying file LICENSE) | ||
| * Source: $(DRUNTIMESRC rt/_stdio_msvc.d) | ||
| * Authors: Rainer Schuetze | ||
| */ | ||
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| struct _iobuf | ||
| { | ||
| char* _ptr; | ||
| int _cnt; // _cnt and _base exchanged for VS2015 | ||
| char* _base; | ||
| int _flag; | ||
| int _file; | ||
| int _charbuf; | ||
| int _bufsiz; | ||
| char* _tmpfname; | ||
| // additional members in VS2015 | ||
| }; | ||
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| typedef struct _iobuf FILE; | ||
| extern FILE* stdin; | ||
| extern FILE* stdout; | ||
| extern FILE* stderr; | ||
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| FILE* __acrt_iob_func(int hnd); // VS2015+ | ||
| FILE* __iob_func(); // VS2013- | ||
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| int _set_output_format(int format); // VS2013- | ||
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| //extern const char* __acrt_iob_func; | ||
| extern const char* _nullfunc = 0; | ||
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| #pragma comment(linker, "/alternatename:__acrt_iob_func=_nullfunc") | ||
| #pragma comment(linker, "/alternatename:__iob_func=_nullfunc") | ||
| #pragma comment(linker, "/alternatename:_set_output_format=_nullfunc") | ||
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| void init_msvc() | ||
| { | ||
| if (&__acrt_iob_func != (void*) &_nullfunc) | ||
| { | ||
| stdin = __acrt_iob_func(0); | ||
| stdout = __acrt_iob_func(1); | ||
| stderr = __acrt_iob_func(2); | ||
| } | ||
| else if (&__iob_func != (void*) &_nullfunc) | ||
| { | ||
| FILE* fp = __iob_func(); | ||
| stdin = fp; | ||
| stdout = fp + 1; | ||
| stderr = fp + 1; | ||
| } | ||
| if (&_set_output_format != (void*) &_nullfunc) | ||
| _set_output_format(1); | ||
| } | ||
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| // VS2013- implements these functions as macros, VS2015+ provides symbols | ||
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| #pragma comment(linker, "/alternatename:_fputc_nolock=_msvc_fputc_nolock") | ||
| #pragma comment(linker, "/alternatename:_fgetc_nolock=_msvc_fgetc_nolock") | ||
| #pragma comment(linker, "/alternatename:rewind=_msvc_rewind") | ||
| #pragma comment(linker, "/alternatename:clearerr=_msvc_clearerr") | ||
| #pragma comment(linker, "/alternatename:feof=_msvc_feof") | ||
| #pragma comment(linker, "/alternatename:ferror=_msvc_ferror") | ||
| #pragma comment(linker, "/alternatename:fileno=_msvc_fileno") | ||
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| // VS2013- helper functions | ||
| int _filbuf(FILE *fp); | ||
| int _flsbuf(int c, FILE *fp); | ||
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| #pragma comment(linker, "/alternatename:_filbuf=_nullfunc") | ||
| #pragma comment(linker, "/alternatename:_flsbuf=_nullfunc") | ||
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| int _msvc_fputc_nolock(int c, FILE *fp) | ||
| { | ||
| fp->_cnt = fp->_cnt - 1; | ||
| if (fp->_cnt >= 0) | ||
| { | ||
| *(fp->_ptr) = (char)c; | ||
| fp->_ptr = fp->_ptr + 1; | ||
| return (char)c; | ||
| } | ||
| else | ||
| return _flsbuf(c, fp); | ||
| } | ||
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| int _msvc_fgetc_nolock(FILE *fp) | ||
| { | ||
| fp->_cnt = fp->_cnt - 1; | ||
| if (fp->_cnt >= 0) | ||
| { | ||
| char c = *(fp->_ptr); | ||
| fp->_ptr = fp->_ptr + 1; | ||
| return c; | ||
| } | ||
| else | ||
| return _filbuf(fp); | ||
| } | ||
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| enum | ||
| { | ||
| _IOFBF = 0, | ||
| _IOLBF = 0x40, | ||
| _IONBF = 4, | ||
| _IOREAD = 1, // non-standard | ||
| _IOWRT = 2, // non-standard | ||
| _IOMYBUF = 8, // non-standard | ||
| _IOEOF = 0x10, // non-standard | ||
| _IOERR = 0x20, // non-standard | ||
| _IOSTRG = 0x40, // non-standard | ||
| _IORW = 0x80, // non-standard | ||
| _IOAPP = 0x200, // non-standard | ||
| _IOAPPEND = 0x200, // non-standard | ||
| }; | ||
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| enum | ||
| { | ||
| SEEK_SET, | ||
| SEEK_CUR, | ||
| SEEK_END | ||
| }; | ||
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| int fseek(FILE *fp, long off, int whence); | ||
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| void _msvc_rewind(FILE* stream) | ||
| { | ||
| fseek(stream, 0L, SEEK_SET); | ||
| stream->_flag = stream->_flag & ~_IOERR; | ||
| } | ||
| /// | ||
| void _msvc_clearerr(FILE* stream) | ||
| { | ||
| stream->_flag = stream->_flag & ~(_IOERR|_IOEOF); | ||
| } | ||
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| int _msvc_feof(FILE* stream) | ||
| { | ||
| return stream->_flag & _IOEOF; | ||
| } | ||
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| int _msvc_ferror(FILE* stream) | ||
| { | ||
| return stream->_flag & _IOERR; | ||
| } | ||
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| int _msvc_fileno(FILE* stream) | ||
| { | ||
| return stream->_file; | ||
| } |
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