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Commit 263e5c24 authored by Dick Hollenbeck's avatar Dick Hollenbeck
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sch_dir_lib_source.*

parents de6beac9 4c8b87dc
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Showing with 102 additions and 53 deletions
new/sch_dir_lib_source.cpp
View file @ 263e5c24
......@@ -57,6 +57,7 @@ using namespace SCH;
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <assert.h>
#include <vector>
using namespace std;
......@@ -159,13 +160,19 @@ static const char* endsWithRev( const char* start, const char* tail, char separa
return 0;
}
static inline const char* endsWithRev( const STRING& aPartName, char separator )
{
return endsWithRev( aPartName.c_str(), aPartName.c_str()+aPartName.size(), separator );
}
// see struct BY_REV
bool BY_REV::operator() ( const STRING& s1, const STRING& s2 ) const
{
// avoid instantiating new STRINGs, and thank goodness that c_str() is const.
const char* rev1 = endsWithRev( s1.c_str(), s1.c_str()+s1.size(), '/' );
const char* rev2 = endsWithRev( s2.c_str(), s2.c_str()+s2.size(), '/' );
const char* rev1 = endsWithRev( s1, '/' );
const char* rev2 = endsWithRev( s2, '/' );
int rootLen1 = rev1 ? rev1 - s1.c_str() : s1.size();
int rootLen2 = rev2 ? rev2 - s2.c_str() : s2.size();
......@@ -259,7 +266,7 @@ STRING DIR_LIB_SOURCE::makeFileName( const STRING& aPartName )
STRING fileName = sourceURI + "/";
const char* rev = endsWithRev( aPartName.c_str(), aPartName.c_str()+aPartName.size(), '/' );
const char* rev = endsWithRev( aPartName, '/' );
if( rev )
{
......@@ -278,14 +285,14 @@ STRING DIR_LIB_SOURCE::makeFileName( const STRING& aPartName )
}
void DIR_LIB_SOURCE::readSExpression( STRING* aResult, const STRING& aFilename ) throw( IO_ERROR )
void DIR_LIB_SOURCE::readString( STRING* aResult, const STRING& aFileName ) throw( IO_ERROR )
{
FILE_WRAP fw = open( aFilename.c_str(), O_RDONLY );
FILE_WRAP fw = open( aFileName.c_str(), O_RDONLY );
if( fw == -1 )
{
STRING msg = strerror( errno );
msg += "; cannot open(O_RDONLY) file " + aFilename;
msg += "; cannot open(O_RDONLY) file " + aFileName;
throw( IO_ERROR( msg.c_str() ) );
}
......@@ -296,7 +303,7 @@ void DIR_LIB_SOURCE::readSExpression( STRING* aResult, const STRING& aFilename )
// sanity check on file size
if( fs.st_size > (1*1024*1024) )
{
STRING msg = aFilename;
STRING msg = aFileName;
msg += " seems too big. ( > 1 mbyte )";
throw IO_ERROR( msg.c_str() );
}
......@@ -310,7 +317,7 @@ void DIR_LIB_SOURCE::readSExpression( STRING* aResult, const STRING& aFilename )
if( count != (int) fs.st_size )
{
STRING msg = strerror( errno );
msg += "; cannot read file " + aFilename;
msg += "; cannot read file " + aFileName;
throw( IO_ERROR( msg.c_str() ) );
}
......@@ -358,42 +365,42 @@ DIR_LIB_SOURCE::~DIR_LIB_SOURCE()
void DIR_LIB_SOURCE::GetCategoricalPartNames( STRINGS* aResults, const STRING& aCategory )
throw( IO_ERROR )
{
PN_ITER limit = aCategory.size() ?
partnames.lower_bound( aCategory + char( '/' + 1 ) ) :
partnames.end();
PN_ITER it = aCategory.size() ?
partnames.lower_bound( aCategory + "/" ) :
partnames.begin();
aResults->clear();
if( aCategory.size() )
if( useVersioning )
{
STRING lower = aCategory + "/";
STRING upper = aCategory + char( '/' + 1 );
STRING partName;
PART_CACHE::const_iterator limit = partnames.upper_bound( upper );
for( PART_CACHE::const_iterator it = partnames.lower_bound( lower ); it!=limit; ++it )
while( it != limit )
{
/*
const char* start = it->c_str();
size_t len = it->size();
const char* rev = endsWithRev( *it, '/' );
// all cached partnames have a rev string in useVersioning mode
assert( rev );
if( endsWithRev( start, start+len, '/' ) )
continue;
*/
// partName is substring which omits the rev AND the rev separator
partName.assign( *it, 0, rev - it->c_str() - 1 );
aResults->push_back( *it );
aResults->push_back( partName );
// skip over all other versions of the same partName.
it = partnames.lower_bound( partName + char( '/' + 1 ) );
}
}
else
{
for( PART_CACHE::const_iterator it = partnames.begin(); it!=partnames.end(); ++it )
{
/*
const char* start = it->c_str();
size_t len = it->size();
if( !endsWithRev( start, start+len, '/' ) )
continue;
*/
aResults->push_back( *it );
}
while( it != limit )
aResults->push_back( *it++ );
}
}
......@@ -401,25 +408,53 @@ void DIR_LIB_SOURCE::GetCategoricalPartNames( STRINGS* aResults, const STRING& a
void DIR_LIB_SOURCE::ReadPart( STRING* aResult, const STRING& aPartName, const STRING& aRev )
throw( IO_ERROR )
{
STRING partname = aPartName;
STRING fileName;
STRING partName = aPartName; // appended with aRev too if not empty
const char* rev = endsWithRev( partName, '/' );
if( aRev.size() )
partname += "/" + aRev;
{
if( rev ) // a supplied rev replaces any in aPartName
partName.resize( rev - partName.c_str() - 1 );
partName += "/" + aRev;
PART_CACHE::const_iterator it = partnames.find( partname );
rev = endsWithRev( partName, '/' );
}
// partName is the exact part name we need here, or if rev is NULL,
// then look for the highest numbered revision.
if( it == partnames.end() ) // part not found
if( rev )
{
partname += " not found.";
throw IO_ERROR( partname.c_str() );
PN_ITER it = partnames.find( partName );
if( it == partnames.end() ) // part not found
{
partName += " not found.";
throw IO_ERROR( partName.c_str() );
}
readString( aResult, makeFileName( partName ) );
}
else
{
STRING search = partName + '/';
// create a fileName for the sweet string
STRING fileName = makeFileName( aPartName );
// no rev on partName string. First the first, which should be
// the highnest numbered rev because of BY_REV compare method.
PN_ITER it = partnames.upper_bound( search );
// @todo what about aRev?, and define the public API wrt to aRev better.
// verify that this one that is greater than partName is a match and not
// some unrelated name that is larger.
if( it == partnames.end() || it->compare( 0, search.size(), search ) != 0 )
{
partName += " rev not found.";
throw IO_ERROR( partName.c_str() );
}
readSExpression( aResult, fileName );
readString( aResult, makeFileName( *it ) );
}
}
......@@ -539,6 +574,8 @@ int main( int argc, char** argv )
try
{
STRINGS::const_iterator pn;
// DIR_LIB_SOURCE uut( argv[1] ? argv[1] : "", "" );
DIR_LIB_SOURCE uut( argv[1] ? argv[1] : "", "useVersioning" );
......@@ -555,6 +592,13 @@ int main( int argc, char** argv )
uut.ReadParts( &sweets, partnames );
printf( "\nSweets for Category = 'Category' parts:\n" );
pn = partnames.begin();
for( STRINGS::const_iterator it = sweets.begin(); it!=sweets.end(); ++it, ++pn )
{
printf( " %s: %s", pn->c_str(), it->c_str() );
}
// fetch the part names for ALL categories.
uut.GetCategoricalPartNames( &partnames );
......@@ -567,7 +611,7 @@ int main( int argc, char** argv )
uut.ReadParts( &sweets, partnames );
printf( "\nSweets for ALL parts:\n" );
STRINGS::const_iterator pn = partnames.begin();
pn = partnames.begin();
for( STRINGS::const_iterator it = sweets.begin(); it!=sweets.end(); ++it, ++pn )
{
printf( " %s: %s", pn->c_str(), it->c_str() );
......
new/sch_dir_lib_source.h
View file @ 263e5c24
......@@ -77,10 +77,12 @@ class DIR_LIB_SOURCE : public LIB_SOURCE
/// and some of which may have legal "revN[N..]" type strings.
PART_CACHE partnames;
typedef PART_CACHE::const_iterator PN_ITER;
/// categories which we expect to find in the set of @a partnames
NAME_CACHE categories;
std::vector<char> readBuffer; ///< used by readSExpression()
std::vector<char> readBuffer; ///< used by readString()
/**
* Function cache
......@@ -109,18 +111,17 @@ class DIR_LIB_SOURCE : public LIB_SOURCE
bool makePartName( STRING* aPartName, const char* aEntry, const STRING& aCategory );
/**
* Function readSExpression
* reads an s-expression into aResult. Candidate for virtual function later.
* Function readString
* reads a Sweet string into aResult. Candidate for virtual function later.
*/
void readSExpression( STRING* aResult, const STRING& aNameSpec ) throw( IO_ERROR );
void readString( STRING* aResult, const STRING& aFileName ) throw( IO_ERROR );
/**
* Function cacheOneDir
* loads part names [and categories] from a directory given by
* "sourceURI + '/' + category"
* Categories are only loaded if processing the top most directory because
* only one level of categories are supported. We know we are in the
* only one level of categories is supported. We know we are in the
* top most directory if aCategory is empty.
*/
void cacheOneDir( const STRING& aCategory ) throw( IO_ERROR );
......@@ -144,8 +145,11 @@ public:
* "/home/designer/mylibdir". This is not a URI, but an OS specific path that
* can be given to opendir().
*
* @param doUseVersioning if true means support versioning in the directory tree, otherwise
* only a single version of each part is recognized.
* @param aOptions is the options string from the library table, currently
* the only supported option, that this LIB_SOURCE knows about is
* "userVersioning". If present means support versioning in the directory
* tree, otherwise only a single version of each part is recognized, namely the
* one without the ".revN[N..]" trailer.
*/
DIR_LIB_SOURCE( const STRING& aDirectoryPath, const STRING& aOptions = StrEmpty )
throw( IO_ERROR );
......
new/sch_lib.h
View file @ 263e5c24
......@@ -90,7 +90,8 @@ protected: ///< derived classes must implement
* Function ReadParts
* fetches the s-expressions for each part given in @a aPartNames, into @a aResults,
* honoring the array indices respectfully.
* @param aPartNames is a list of part names, one name per list element.
* @param aPartNames is a list of part names, one name per list element. If a part name
* does not have a version string, then the most recent version is fetched.
* @param aResults receives the s-expressions
*/
virtual void ReadParts( STRINGS* aResults, const STRINGS& aPartNames )
......
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