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comparison: build/stlport/src/stdio_streambuf.cpp
build/stlport/src/stdio_streambuf.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:bb440e4bf5a3 |
|---|---|
| 1 /* | |
| 2 * Copyright (c) 1999 | |
| 3 * Silicon Graphics Computer Systems, Inc. | |
| 4 * | |
| 5 * Copyright (c) 1999 | |
| 6 * Boris Fomitchev | |
| 7 * | |
| 8 * This material is provided "as is", with absolutely no warranty expressed | |
| 9 * or implied. Any use is at your own risk. | |
| 10 * | |
| 11 * Permission to use or copy this software for any purpose is hereby granted | |
| 12 * without fee, provided the above notices are retained on all copies. | |
| 13 * Permission to modify the code and to distribute modified code is granted, | |
| 14 * provided the above notices are retained, and a notice that the code was | |
| 15 * modified is included with the above copyright notice. | |
| 16 * | |
| 17 */ | |
| 18 | |
| 19 #include "stlport_prefix.h" | |
| 20 #include "stdio_streambuf.h" | |
| 21 | |
| 22 #ifdef _STLP_UNIX | |
| 23 # include <sys/types.h> | |
| 24 # include <sys/stat.h> | |
| 25 #endif | |
| 26 | |
| 27 #include <fstream> | |
| 28 #include <limits> | |
| 29 | |
| 30 _STLP_BEGIN_NAMESPACE | |
| 31 _STLP_MOVE_TO_PRIV_NAMESPACE | |
| 32 | |
| 33 // Compare with streamoff definition in stl/char_traits.h! | |
| 34 | |
| 35 #if defined (_STLP_USE_DEFAULT_FILE_OFFSET) || \ | |
| 36 (!defined(_LARGEFILE_SOURCE) && !defined(_LARGEFILE64_SOURCE)) | |
| 37 # if !defined (_STLP_MSVC) || (_STLP_MSVC < 1400) || defined(_STLP_WCE) | |
| 38 # define FSEEK fseek | |
| 39 # else | |
| 40 # define FSEEK _fseeki64 | |
| 41 # endif | |
| 42 # define FSETPOS fsetpos | |
| 43 # define FGETPOS fgetpos | |
| 44 # define FPOS_T fpos_t | |
| 45 #else | |
| 46 # define FSEEK fseeko64 | |
| 47 # define FSETPOS fsetpos64 | |
| 48 # define FGETPOS fgetpos64 | |
| 49 # define FPOS_T fpos64_t | |
| 50 #endif | |
| 51 | |
| 52 //---------------------------------------------------------------------- | |
| 53 // Class stdio_streambuf_base | |
| 54 | |
| 55 stdio_streambuf_base::stdio_streambuf_base(FILE* file) | |
| 56 : /* _STLP_STD::FILE_basic_streambuf(file, 0), */ | |
| 57 _M_file(file) | |
| 58 {} | |
| 59 | |
| 60 stdio_streambuf_base::~stdio_streambuf_base() { | |
| 61 _STLP_VENDOR_CSTD::fflush(_M_file); | |
| 62 } | |
| 63 | |
| 64 _STLP_STD::streambuf* stdio_streambuf_base::setbuf(char* s, streamsize n) { | |
| 65 #ifdef _STLP_WCE | |
| 66 // no buffering in windows ce .NET | |
| 67 #else | |
| 68 size_t __n_size_t = (sizeof(streamsize) > sizeof(size_t)) ? __STATIC_CAST(size_t, (min)(__STATIC_CAST(streamsize, (numeric_limits<size_t>::max)()), n)) | |
| 69 : __STATIC_CAST(size_t, n); | |
| 70 _STLP_VENDOR_CSTD::setvbuf(_M_file, s, (s == 0 && n == 0) ? _IONBF : _IOFBF, __n_size_t); | |
| 71 #endif | |
| 72 return this; | |
| 73 } | |
| 74 | |
| 75 stdio_streambuf_base::pos_type | |
| 76 stdio_streambuf_base::seekoff(off_type off, ios_base::seekdir dir, | |
| 77 ios_base::openmode /* mode */) { | |
| 78 int whence; | |
| 79 switch (dir) { | |
| 80 case ios_base::beg: | |
| 81 whence = SEEK_SET; | |
| 82 break; | |
| 83 case ios_base::cur: | |
| 84 whence = SEEK_CUR; | |
| 85 break; | |
| 86 case ios_base::end: | |
| 87 whence = SEEK_END; | |
| 88 break; | |
| 89 default: | |
| 90 return pos_type(-1); | |
| 91 } | |
| 92 | |
| 93 if (off <= numeric_limits<off_type>::max() && FSEEK(_M_file, off, whence) == 0) { | |
| 94 FPOS_T pos; | |
| 95 FGETPOS(_M_file, &pos); | |
| 96 // added 21 june 00 mdb,rjf,wjs: glibc 2.2 changed fpos_t to be a struct instead | |
| 97 // of a primitive type | |
| 98 #if (defined (__GLIBC__) && ((__GLIBC__ > 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 2)))) | |
| 99 return pos_type((streamoff)pos.__pos); | |
| 100 #elif defined (__ISCPP__) || defined (__MVS__) || defined (__OS400__) | |
| 101 return pos_type(pos.__fpos_elem[ 0 ]); | |
| 102 #elif defined (__EMX__) | |
| 103 return pos_type((streamoff)pos._pos); | |
| 104 #else | |
| 105 return pos_type(pos); | |
| 106 #endif | |
| 107 } | |
| 108 else | |
| 109 return pos_type(-1); | |
| 110 } | |
| 111 | |
| 112 | |
| 113 stdio_streambuf_base::pos_type | |
| 114 stdio_streambuf_base::seekpos(pos_type pos, ios_base::openmode /* mode */) { | |
| 115 // added 21 june 00 mdb,rjf,wjs: glibc 2.2 changed fpos_t to be a struct instead | |
| 116 // of a primitive type | |
| 117 #if (defined(__GLIBC__) && ( (__GLIBC__ > 2) || ( (__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 2) ) ) ) | |
| 118 FPOS_T p; | |
| 119 p.__pos = pos; | |
| 120 # ifdef _STLP_USE_UCLIBC | |
| 121 # ifdef __STDIO_MBSTATE | |
| 122 memset( &(p.__mbstate), 0, sizeof(p.__mbstate) ); | |
| 123 # endif | |
| 124 # ifdef __STDIO_WIDE | |
| 125 p.mblen_pending = 0; | |
| 126 # endif | |
| 127 # else | |
| 128 memset( &(p.__state), 0, sizeof(p.__state) ); | |
| 129 # endif | |
| 130 #elif defined (__MVS__) || defined (__OS400__) | |
| 131 FPOS_T p; | |
| 132 p.__fpos_elem[0] = pos; | |
| 133 #elif defined (__EMX__) | |
| 134 FPOS_T p; | |
| 135 p._pos = pos; | |
| 136 memset( &(p._mbstate), 0, sizeof(p._mbstate) ); | |
| 137 #else | |
| 138 FPOS_T p(pos); | |
| 139 #endif | |
| 140 | |
| 141 return FSETPOS(_M_file, &p) == 0 ? pos : pos_type(-1); | |
| 142 } | |
| 143 | |
| 144 int stdio_streambuf_base::sync() { | |
| 145 return _STLP_VENDOR_CSTD::fflush(_M_file) == 0 ? 0 : -1; | |
| 146 } | |
| 147 | |
| 148 //---------------------------------------------------------------------- | |
| 149 // Class stdio_istreambuf | |
| 150 | |
| 151 stdio_istreambuf::~stdio_istreambuf() {} | |
| 152 | |
| 153 streamsize stdio_istreambuf::showmanyc() | |
| 154 { return 0; } | |
| 155 | |
| 156 stdio_istreambuf::int_type stdio_istreambuf::underflow() | |
| 157 { | |
| 158 #ifdef _STLP_WCE | |
| 159 int c = fgetc(_M_file); | |
| 160 #else | |
| 161 int c = getc(_M_file); | |
| 162 #endif | |
| 163 if (c != EOF) { | |
| 164 _STLP_VENDOR_CSTD::ungetc(c, _M_file); | |
| 165 return c; | |
| 166 } | |
| 167 else | |
| 168 return traits_type::eof(); | |
| 169 } | |
| 170 | |
| 171 stdio_istreambuf::int_type stdio_istreambuf::uflow() { | |
| 172 #ifdef _STLP_WCE | |
| 173 int c = fgetc(_M_file); | |
| 174 #else | |
| 175 int c = getc(_M_file); | |
| 176 #endif | |
| 177 return c != EOF ? c : traits_type::eof(); | |
| 178 } | |
| 179 | |
| 180 stdio_istreambuf::int_type stdio_istreambuf::pbackfail(int_type c) { | |
| 181 if (c != traits_type::eof()) { | |
| 182 int result = _STLP_VENDOR_CSTD::ungetc(c, _M_file); | |
| 183 return result != EOF ? result : traits_type::eof(); | |
| 184 } | |
| 185 else{ | |
| 186 if (this->eback() < this->gptr()) { | |
| 187 this->gbump(-1); | |
| 188 return traits_type::not_eof(c); | |
| 189 } | |
| 190 else | |
| 191 return traits_type::eof(); | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 //---------------------------------------------------------------------- | |
| 196 // Class stdio_ostreambuf | |
| 197 | |
| 198 stdio_ostreambuf::~stdio_ostreambuf() {} | |
| 199 | |
| 200 streamsize stdio_ostreambuf::showmanyc() | |
| 201 { return -1; } | |
| 202 | |
| 203 stdio_ostreambuf::int_type stdio_ostreambuf::overflow(int_type c) { | |
| 204 // Write the existing buffer, without writing any additional character. | |
| 205 if (c == traits_type::eof()) { | |
| 206 // Do we have a buffer to write? | |
| 207 ptrdiff_t unwritten = this->pptr() - this->pbase(); | |
| 208 if (unwritten != 0) { | |
| 209 _STLP_VENDOR_CSTD::fflush(_M_file); | |
| 210 // Test if the write succeeded. | |
| 211 if (this->pptr() - this->pbase() < unwritten) | |
| 212 return traits_type::not_eof(c); | |
| 213 else | |
| 214 return traits_type::eof(); | |
| 215 } | |
| 216 | |
| 217 // We always succeed if we don't have to do anything. | |
| 218 else | |
| 219 return traits_type::not_eof(c); | |
| 220 } | |
| 221 | |
| 222 // Write the character c, and whatever else might be in the buffer. | |
| 223 else { | |
| 224 #ifdef _STLP_WCE | |
| 225 int result = fputc(c, _M_file); | |
| 226 #else | |
| 227 int result = putc(c, _M_file); | |
| 228 #endif | |
| 229 return result != EOF ? result : traits_type::eof(); | |
| 230 } | |
| 231 } | |
| 232 | |
| 233 _STLP_MOVE_TO_STD_NAMESPACE | |
| 234 _STLP_END_NAMESPACE | |
| 235 | |
| 236 // Local Variables: | |
| 237 // mode:C++ | |
| 238 // End: | |
| 239 |
