diff options
Diffstat (limited to 'external/libcurl_android/jni/libcurl/src/tool_cb_see.c')
| -rwxr-xr-x | external/libcurl_android/jni/libcurl/src/tool_cb_see.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/external/libcurl_android/jni/libcurl/src/tool_cb_see.c b/external/libcurl_android/jni/libcurl/src/tool_cb_see.c new file mode 100755 index 00000000..2f49e1d9 --- /dev/null +++ b/external/libcurl_android/jni/libcurl/src/tool_cb_see.c @@ -0,0 +1,131 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al. + * + * This software is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at http://curl.haxx.se/docs/copyright.html. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the COPYING file. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ***************************************************************************/ +#include "tool_setup.h" + +#define ENABLE_CURLX_PRINTF +/* use our own printf() functions */ +#include "curlx.h" + +#include "tool_cfgable.h" +#include "tool_cb_see.h" + +#include "memdebug.h" /* keep this as LAST include */ + +/* OUR_MAX_SEEK_L has 'long' data type, OUR_MAX_SEEK_O has 'curl_off_t, + both represent the same value. Maximum offset used here when we lseek + using a 'long' data type offset */ + +#define OUR_MAX_SEEK_L 2147483647L - 1L +#define OUR_MAX_SEEK_O CURL_OFF_T_C(0x7FFFFFFF) - CURL_OFF_T_C(0x1) + +/* +** callback for CURLOPT_SEEKFUNCTION +** +** Notice that this is not supposed to return the resulting offset. This +** shall only return CURL_SEEKFUNC_* return codes. +*/ + +int tool_seek_cb(void *userdata, curl_off_t offset, int whence) +{ + struct InStruct *in = userdata; + +#if(CURL_SIZEOF_CURL_OFF_T > SIZEOF_OFF_T) && !defined(USE_WIN32_LARGE_FILES) + + /* The offset check following here is only interesting if curl_off_t is + larger than off_t and we are not using the WIN32 large file support + macros that provide the support to do 64bit seeks correctly */ + + if(offset > OUR_MAX_SEEK_O) { + /* Some precaution code to work around problems with different data sizes + to allow seeking >32bit even if off_t is 32bit. Should be very rare and + is really valid on weirdo-systems. */ + curl_off_t left = offset; + + if(whence != SEEK_SET) + /* this code path doesn't support other types */ + return CURL_SEEKFUNC_FAIL; + + if(LSEEK_ERROR == lseek(in->fd, 0, SEEK_SET)) + /* couldn't rewind to beginning */ + return CURL_SEEKFUNC_FAIL; + + while(left) { + long step = (left > OUR_MAX_SEEK_O) ? OUR_MAX_SEEK_L : (long)left; + if(LSEEK_ERROR == lseek(in->fd, step, SEEK_CUR)) + /* couldn't seek forwards the desired amount */ + return CURL_SEEKFUNC_FAIL; + left -= step; + } + return CURL_SEEKFUNC_OK; + } +#endif + + if(LSEEK_ERROR == lseek(in->fd, offset, whence)) + /* couldn't rewind, the reason is in errno but errno is just not portable + enough and we don't actually care that much why we failed. We'll let + libcurl know that it may try other means if it wants to. */ + return CURL_SEEKFUNC_CANTSEEK; + + return CURL_SEEKFUNC_OK; +} + +#if defined(WIN32) && !defined(__MINGW64__) + +#ifdef __BORLANDC__ +/* 64-bit lseek-like function unavailable */ +# define _lseeki64(hnd,ofs,whence) lseek(hnd,ofs,whence) +#endif + +#ifdef __POCC__ +# if(__POCC__ < 450) +/* 64-bit lseek-like function unavailable */ +# define _lseeki64(hnd,ofs,whence) _lseek(hnd,ofs,whence) +# else +# define _lseeki64(hnd,ofs,whence) _lseek64(hnd,ofs,whence) +# endif +#endif + +#ifdef _WIN32_WCE +/* 64-bit lseek-like function unavailable */ +# undef _lseeki64 +# define _lseeki64(hnd,ofs,whence) lseek(hnd,ofs,whence) +# undef _get_osfhandle +# define _get_osfhandle(fd) (fd) +#endif + +/* + * Truncate a file handle at a 64-bit position 'where'. + */ + +int tool_ftruncate64(int fd, curl_off_t where) +{ + if(_lseeki64(fd, where, SEEK_SET) < 0) + return -1; + + if(!SetEndOfFile((HANDLE)_get_osfhandle(fd))) + return -1; + + return 0; +} + +#endif /* WIN32 && ! __MINGW64__ */ + |