From a0a18305a27a3c4483cc5c7971b977a951a0f03d Mon Sep 17 00:00:00 2001 From: Paul RASCLE Date: Tue, 9 Oct 2018 17:26:15 +0200 Subject: [PATCH] MED write/append with a lower major version of MED file format: third step --- src/MEDWrapper/MED_Factory.cxx | 45 ++++++++++++++++++++++++++++++---- 1 file changed, 40 insertions(+), 5 deletions(-) diff --git a/src/MEDWrapper/MED_Factory.cxx b/src/MEDWrapper/MED_Factory.cxx index 2ffcfe69f..e03f7d66b 100644 --- a/src/MEDWrapper/MED_Factory.cxx +++ b/src/MEDWrapper/MED_Factory.cxx @@ -27,6 +27,7 @@ #include #include #include +#include #include extern "C" @@ -41,6 +42,9 @@ extern "C" #include #endif +// ------------------------------------------------------------------------------------------------------------------- +// --- MED file compatibility: write using a lower major version implies append on an empty file of the target version + #define MED_MAJOR_EXPECTED 4 #define MED_MINOR_EXPECTED 0 #if MED_MAJOR_NUM != MED_MAJOR_EXPECTED @@ -52,6 +56,39 @@ extern "C" #define MED_VERSIONS_APPEND_COMPATIBLE {40, 32, 33} // --- 10*major + minor (the 3rd digit, release, is not used here, // med uses always the latest available) // --- The first in the list should be the default: current version +// --- empty med file content for the different MED versions with a different major. +// ==> correct accordingly CreateEmptyMEDFile method below! +#define EMPTY_FILE_32 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+#define EMPTY_FILE_33 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+//bytes hexa representation of MED file built in Python +//# ----------------------------- +//f= open('vide_321.med', 'rb') +//data=f.read() +//ba=bytearray(data) +//l=[] +//for c in ba: +// l.append(hex(c)) +//a="" +//for i in l: +// a+=i +// a+=',' +//print a +//# ----------------------------- + +//! internal use: fileName and version must be checked before call +bool CreateEmptyMEDFile(const std::string& fileName, int version) +{ + MESSAGE("copy an empty existing med file of the right version, for append" << version); + static const unsigned char empty_32[] = EMPTY_FILE_32; + static const unsigned char empty_33[] = EMPTY_FILE_33; + std::ofstream ofs(fileName); + if (version == 32) + ofs.write(reinterpret_cast(empty_32),sizeof(empty_32)); + else if (version == 33) + ofs.write(reinterpret_cast(empty_33),sizeof(empty_33)); + return true; +} +// ------------------------------------------------------------------------------------------------------------------- namespace MED { @@ -187,7 +224,7 @@ namespace MED if (wantedMinor < MED_MINOR_NUM) minor = wantedMinor; } - else // an empty existing med file of the right version will be used for append + else // an empty existing med file of the right version will be used for append { int medVersionsOK[] = MED_VERSIONS_APPEND_COMPATIBLE; bool isVersionOK = false; @@ -197,10 +234,8 @@ namespace MED isVersionOK =true; break; } - if (isVersionOK) // copy an empty existing med file of the right version, for append - { - MESSAGE("copy an empty existing med file of the right version, for append" << theVersion); - } + if (isVersionOK) // copy an empty existing med file of the right version, for append + CreateEmptyMEDFile(fileName, theVersion); } } return new MED::TWrapper(fileName, minor); -- 2.39.2