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opencv/modules/core/src/persistence_c.cpp

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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html
#include "precomp.hpp"
#include "persistence.hpp"
static inline bool cv_strcasecmp(const char * s1, const char * s2)
{
if ( s1 == 0 && s2 == 0 )
return true;
else if ( s1 == 0 || s2 == 0 )
return false;
size_t len1 = strlen(s1);
size_t len2 = strlen(s2);
if ( len1 != len2 )
return false;
for ( size_t i = 0U; i < len1; i++ )
if ( tolower( static_cast<int>(s1[i]) ) != tolower( static_cast<int>(s2[i]) ) )
return false;
return true;
}
// this function will convert "aa?bb&cc&dd" to {"aa", "bb", "cc", "dd"}
static std::vector<std::string> analyze_file_name( std::string const & file_name )
{
static const char not_file_name = '\n';
static const char parameter_begin = '?';
static const char parameter_separator = '&';
std::vector<std::string> result;
if ( file_name.find(not_file_name, 0U) != std::string::npos )
return result;
size_t beg = file_name.find_last_of(parameter_begin);
size_t end = file_name.size();
result.push_back(file_name.substr(0U, beg));
if ( beg != std::string::npos )
{
beg ++;
for ( size_t param_beg = beg, param_end = beg;
param_end < end;
param_beg = param_end + 1U )
{
param_end = file_name.find_first_of( parameter_separator, param_beg );
if ( (param_end == std::string::npos || param_end != param_beg) && param_beg + 1U < end )
{
result.push_back( file_name.substr( param_beg, param_end - param_beg ) );
}
}
}
return result;
}
static bool is_param_exist( const std::vector<std::string> & params, const std::string & param )
{
if ( params.size() < 2U )
return false;
return std::find(params.begin(), params.end(), param) != params.end();
}
//===========================================================================================
static
void cvOpenFileStorage_(CvFileStorage*& fs, const char* query, CvMemStorage* dststorage, int flags, const char* encoding)
{
int default_block_size = 1 << 18;
bool append = (flags & 3) == CV_STORAGE_APPEND;
bool mem = (flags & CV_STORAGE_MEMORY) != 0;
bool write_mode = (flags & 3) != 0;
bool write_base64 = (write_mode || append) && (flags & CV_STORAGE_BASE64) != 0;
bool isGZ = false;
size_t fnamelen = 0;
const char * filename = query;
std::vector<std::string> params;
if ( !mem )
{
params = analyze_file_name( query );
if ( !params.empty() )
filename = params.begin()->c_str();
if ( write_base64 == false && is_param_exist( params, "base64" ) )
write_base64 = (write_mode || append);
}
if( !filename || filename[0] == '\0' )
{
if( !write_mode )
CV_Error( CV_StsNullPtr, mem ? "NULL or empty filename" : "NULL or empty buffer" );
mem = true;
}
else
fnamelen = strlen(filename);
if( mem && append )
CV_Error( CV_StsBadFlag, "CV_STORAGE_APPEND and CV_STORAGE_MEMORY are not currently compatible" );
fs->memstorage = cvCreateMemStorage( default_block_size );
fs->dststorage = dststorage ? dststorage : fs->memstorage;
fs->flags = CV_FILE_STORAGE;
fs->write_mode = write_mode;
if( !mem )
{
fs->filename = (char*)cvMemStorageAlloc( fs->memstorage, fnamelen+1 );
strcpy( fs->filename, filename );
char* dot_pos = strrchr(fs->filename, '.');
char compression = '\0';
if( dot_pos && dot_pos[1] == 'g' && dot_pos[2] == 'z' &&
(dot_pos[3] == '\0' || (cv_isdigit(dot_pos[3]) && dot_pos[4] == '\0')) )
{
if( append )
{
cvReleaseFileStorage( &fs );
CV_Error(CV_StsNotImplemented, "Appending data to compressed file is not implemented" );
}
isGZ = true;
compression = dot_pos[3];
if( compression )
dot_pos[3] = '\0', fnamelen--;
}
if( !isGZ )
{
fs->file = fopen(fs->filename, !fs->write_mode ? "rt" : !append ? "wt" : "a+t" );
if( !fs->file )
goto _exit_;
}
else
{
#if USE_ZLIB
char mode[] = { fs->write_mode ? 'w' : 'r', 'b', compression ? compression : '3', '\0' };
fs->gzfile = gzopen(fs->filename, mode);
if( !fs->gzfile )
goto _exit_;
#else
cvReleaseFileStorage( &fs );
CV_Error(CV_StsNotImplemented, "There is no compressed file storage support in this configuration");
#endif
}
}
fs->roots = 0;
fs->struct_indent = 0;
fs->struct_flags = 0;
fs->wrap_margin = 71;
if( fs->write_mode )
{
int fmt = flags & CV_STORAGE_FORMAT_MASK;
if( mem )
fs->outbuf = new std::deque<char>;
if( fmt == CV_STORAGE_FORMAT_AUTO && filename )
{
const char* dot_pos = NULL;
const char* dot_pos2 = NULL;
// like strrchr() implementation, but save two last positions simultaneously
for (const char* pos = filename; pos[0] != 0; pos++)
{
if (pos[0] == '.')
{
dot_pos2 = dot_pos;
dot_pos = pos;
}
}
if (cv_strcasecmp(dot_pos, ".gz") && dot_pos2 != NULL)
{
dot_pos = dot_pos2;
}
fs->fmt
= (cv_strcasecmp(dot_pos, ".xml") || cv_strcasecmp(dot_pos, ".xml.gz"))
? CV_STORAGE_FORMAT_XML
: (cv_strcasecmp(dot_pos, ".json") || cv_strcasecmp(dot_pos, ".json.gz"))
? CV_STORAGE_FORMAT_JSON
: CV_STORAGE_FORMAT_YAML
;
}
else if ( fmt != CV_STORAGE_FORMAT_AUTO )
{
fs->fmt = fmt;
}
else
{
fs->fmt = CV_STORAGE_FORMAT_XML;
}
// we use factor=6 for XML (the longest characters (' and ") are encoded with 6 bytes (&apos; and &quot;)
// and factor=4 for YAML ( as we use 4 bytes for non ASCII characters (e.g. \xAB))
int buf_size = CV_FS_MAX_LEN*(fs->fmt == CV_STORAGE_FORMAT_XML ? 6 : 4) + 1024;
if (append)
{
fseek( fs->file, 0, SEEK_END );
if (ftell(fs->file) == 0)
append = false;
}
fs->write_stack = cvCreateSeq( 0, sizeof(CvSeq), fs->fmt == CV_STORAGE_FORMAT_XML ?
sizeof(CvXMLStackRecord) : sizeof(int), fs->memstorage );
fs->is_first = 1;
fs->struct_indent = 0;
fs->struct_flags = CV_NODE_EMPTY;
fs->buffer_start = fs->buffer = (char*)cvAlloc( buf_size + 1024 );
fs->buffer_end = fs->buffer_start + buf_size;
fs->base64_writer = 0;
fs->is_default_using_base64 = write_base64;
fs->state_of_writing_base64 = base64::fs::Uncertain;
fs->is_write_struct_delayed = false;
fs->delayed_struct_key = 0;
fs->delayed_struct_flags = 0;
fs->delayed_type_name = 0;
if( fs->fmt == CV_STORAGE_FORMAT_XML )
{
size_t file_size = fs->file ? (size_t)ftell( fs->file ) : (size_t)0;
fs->strstorage = cvCreateChildMemStorage( fs->memstorage );
if( !append || file_size == 0 )
{
if( encoding )
{
if( strcmp( encoding, "UTF-16" ) == 0 ||
strcmp( encoding, "utf-16" ) == 0 ||
strcmp( encoding, "Utf-16" ) == 0 )
{
cvReleaseFileStorage( &fs );
CV_Error( CV_StsBadArg, "UTF-16 XML encoding is not supported! Use 8-bit encoding\n");
}
CV_Assert( strlen(encoding) < 1000 );
char buf[1100];
sprintf(buf, "<?xml version=\"1.0\" encoding=\"%s\"?>\n", encoding);
icvPuts( fs, buf );
}
else
icvPuts( fs, "<?xml version=\"1.0\"?>\n" );
icvPuts( fs, "<opencv_storage>\n" );
}
else
{
int xml_buf_size = 1 << 10;
char substr[] = "</opencv_storage>";
int last_occurence = -1;
xml_buf_size = MIN(xml_buf_size, int(file_size));
fseek( fs->file, -xml_buf_size, SEEK_END );
char* xml_buf = (char*)cvAlloc( xml_buf_size+2 );
// find the last occurrence of </opencv_storage>
for(;;)
{
int line_offset = (int)ftell( fs->file );
char* ptr0 = icvGets( fs, xml_buf, xml_buf_size ), *ptr;
if( !ptr0 )
break;
ptr = ptr0;
for(;;)
{
ptr = strstr( ptr, substr );
if( !ptr )
break;
last_occurence = line_offset + (int)(ptr - ptr0);
ptr += strlen(substr);
}
}
cvFree( &xml_buf );
if( last_occurence < 0 )
{
cvReleaseFileStorage( &fs );
CV_Error( CV_StsError, "Could not find </opencv_storage> in the end of file.\n" );
}
icvCloseFile( fs );
fs->file = fopen( fs->filename, "r+t" );
CV_Assert(fs->file);
fseek( fs->file, last_occurence, SEEK_SET );
// replace the last "</opencv_storage>" with " <!-- resumed -->", which has the same length
icvPuts( fs, " <!-- resumed -->" );
fseek( fs->file, 0, SEEK_END );
icvPuts( fs, "\n" );
}
fs->start_write_struct = icvXMLStartWriteStruct;
fs->end_write_struct = icvXMLEndWriteStruct;
fs->write_int = icvXMLWriteInt;
fs->write_real = icvXMLWriteReal;
fs->write_string = icvXMLWriteString;
fs->write_comment = icvXMLWriteComment;
fs->start_next_stream = icvXMLStartNextStream;
}
else if( fs->fmt == CV_STORAGE_FORMAT_YAML )
{
if( !append)
icvPuts( fs, "%YAML:1.0\n---\n" );
else
icvPuts( fs, "...\n---\n" );
fs->start_write_struct = icvYMLStartWriteStruct;
fs->end_write_struct = icvYMLEndWriteStruct;
fs->write_int = icvYMLWriteInt;
fs->write_real = icvYMLWriteReal;
fs->write_string = icvYMLWriteString;
fs->write_comment = icvYMLWriteComment;
fs->start_next_stream = icvYMLStartNextStream;
}
else
{
if( !append )
icvPuts( fs, "{\n" );
else
{
bool valid = false;
long roffset = 0;
for ( ;
fseek( fs->file, roffset, SEEK_END ) == 0;
roffset -= 1 )
{
const char end_mark = '}';
if ( fgetc( fs->file ) == end_mark )
{
fseek( fs->file, roffset, SEEK_END );
valid = true;
break;
}
}
if ( valid )
{
icvCloseFile( fs );
fs->file = fopen( fs->filename, "r+t" );
CV_Assert(fs->file);
fseek( fs->file, roffset, SEEK_END );
fputs( ",", fs->file );
}
else
{
CV_Error( CV_StsError, "Could not find '}' in the end of file.\n" );
}
}
fs->struct_indent = 4;
fs->start_write_struct = icvJSONStartWriteStruct;
fs->end_write_struct = icvJSONEndWriteStruct;
fs->write_int = icvJSONWriteInt;
fs->write_real = icvJSONWriteReal;
fs->write_string = icvJSONWriteString;
fs->write_comment = icvJSONWriteComment;
fs->start_next_stream = icvJSONStartNextStream;
}
}
else
{
if( mem )
{
fs->strbuf = filename;
fs->strbufsize = fnamelen;
}
size_t buf_size = 1 << 20;
const char* yaml_signature = "%YAML";
const char* json_signature = "{";
const char* xml_signature = "<?xml";
char buf[16] = { 0 };
char* bufPtr = icvGets( fs, buf, sizeof(buf)-2);
if (!bufPtr)
CV_Error(CV_BADARG_ERR, "Can't read from input stream or input stream is empty");
bufPtr = cv_skip_BOM(bufPtr);
CV_Assert(bufPtr);
size_t bufOffset = bufPtr - buf;
if(strncmp( bufPtr, yaml_signature, strlen(yaml_signature) ) == 0)
fs->fmt = CV_STORAGE_FORMAT_YAML;
else if(strncmp( bufPtr, json_signature, strlen(json_signature) ) == 0)
fs->fmt = CV_STORAGE_FORMAT_JSON;
else if(strncmp( bufPtr, xml_signature, strlen(xml_signature) ) == 0)
fs->fmt = CV_STORAGE_FORMAT_XML;
else if(fs->strbufsize == bufOffset)
CV_Error(CV_BADARG_ERR, "Input file is empty");
else
CV_Error(CV_BADARG_ERR, "Unsupported file storage format");
if( !isGZ )
{
if( !mem )
{
fseek( fs->file, 0, SEEK_END );
buf_size = ftell( fs->file );
}
else
buf_size = fs->strbufsize;
buf_size = MIN( buf_size, (size_t)(1 << 20) );
buf_size = MAX( buf_size, (size_t)(CV_FS_MAX_LEN*2 + 1024) );
}
icvRewind(fs);
fs->strbufpos = bufOffset;
fs->str_hash = cvCreateMap( 0, sizeof(CvStringHash),
sizeof(CvStringHashNode), fs->memstorage, 256 );
fs->roots = cvCreateSeq( 0, sizeof(CvSeq),
sizeof(CvFileNode), fs->memstorage );
fs->buffer = fs->buffer_start = (char*)cvAlloc( buf_size + 256 );
fs->buffer_end = fs->buffer_start + buf_size;
fs->buffer[0] = '\n';
fs->buffer[1] = '\0';
//mode = cvGetErrMode();
//cvSetErrMode( CV_ErrModeSilent );
switch (fs->fmt)
{
case CV_STORAGE_FORMAT_XML : { icvXMLParse ( fs ); break; }
case CV_STORAGE_FORMAT_YAML: { icvYMLParse ( fs ); break; }
case CV_STORAGE_FORMAT_JSON: { icvJSONParse( fs ); break; }
default: break;
}
//cvSetErrMode( mode );
// release resources that we do not need anymore
cvFree( &fs->buffer_start );
fs->buffer = fs->buffer_end = 0;
}
fs->is_opened = true;
_exit_:
if( fs )
{
if( cvGetErrStatus() < 0 || (!fs->file && !fs->gzfile && !fs->outbuf && !fs->strbuf) )
{
cvReleaseFileStorage( &fs );
}
else if( !fs->write_mode )
{
icvCloseFile(fs);
// we close the file since it's not needed anymore. But icvCloseFile() resets is_opened,
// which may be misleading. Since we restore the value of is_opened.
fs->is_opened = true;
}
}
return;
}
CV_IMPL CvFileStorage*
cvOpenFileStorage(const char* query, CvMemStorage* dststorage, int flags, const char* encoding)
{
CvFileStorage* fs = (CvFileStorage*)cvAlloc( sizeof(*fs) );
CV_Assert(fs);
memset( fs, 0, sizeof(*fs));
try
{
cvOpenFileStorage_(fs, query, dststorage, flags, encoding);
return fs;
}
catch (...)
{
if (fs)
cvReleaseFileStorage(&fs);
throw;
}
}
/* closes file storage and deallocates buffers */
CV_IMPL void
cvReleaseFileStorage( CvFileStorage** p_fs )
{
if( !p_fs )
CV_Error( CV_StsNullPtr, "NULL double pointer to file storage" );
if( *p_fs )
{
CvFileStorage* fs = *p_fs;
*p_fs = 0;
icvClose(fs, 0);
cvReleaseMemStorage( &fs->strstorage );
cvFree( &fs->buffer_start );
cvReleaseMemStorage( &fs->memstorage );
delete fs->outbuf;
delete fs->base64_writer;
delete[] fs->delayed_struct_key;
delete[] fs->delayed_type_name;
memset( fs, 0, sizeof(*fs) );
cvFree( &fs );
}
}
CV_IMPL void*
cvLoad( const char* filename, CvMemStorage* memstorage,
const char* name, const char** _real_name )
{
void* ptr = 0;
const char* real_name = 0;
cv::FileStorage fs(cvOpenFileStorage(filename, memstorage, CV_STORAGE_READ));
CvFileNode* node = 0;
if( !fs.isOpened() )
return 0;
if( name )
{
node = cvGetFileNodeByName( *fs, 0, name );
}
else
{
int i, k;
for( k = 0; k < (*fs)->roots->total; k++ )
{
CvSeq* seq;
CvSeqReader reader;
node = (CvFileNode*)cvGetSeqElem( (*fs)->roots, k );
CV_Assert(node != NULL);
if( !CV_NODE_IS_MAP( node->tag ))
return 0;
seq = node->data.seq;
node = 0;
cvStartReadSeq( seq, &reader, 0 );
// find the first element in the map
for( i = 0; i < seq->total; i++ )
{
if( CV_IS_SET_ELEM( reader.ptr ))
{
node = (CvFileNode*)reader.ptr;
goto stop_search;
}
CV_NEXT_SEQ_ELEM( seq->elem_size, reader );
}
}
stop_search:
;
}
if( !node )
CV_Error( CV_StsObjectNotFound, "Could not find the/an object in file storage" );
real_name = cvGetFileNodeName( node );
ptr = cvRead( *fs, node, 0 );
// sanity check
if( !memstorage && (CV_IS_SEQ( ptr ) || CV_IS_SET( ptr )) )
CV_Error( CV_StsNullPtr,
"NULL memory storage is passed - the loaded dynamic structure can not be stored" );
if( cvGetErrStatus() < 0 )
{
cvRelease( (void**)&ptr );
real_name = 0;
}
if( _real_name)
{
if (real_name)
{
*_real_name = (const char*)cvAlloc(strlen(real_name));
memcpy((void*)*_real_name, real_name, strlen(real_name));
} else {
*_real_name = 0;
}
}
return ptr;
}
CV_IMPL const char*
cvAttrValue( const CvAttrList* attr, const char* attr_name )
{
while( attr && attr->attr )
{
int i;
for( i = 0; attr->attr[i*2] != 0; i++ )
{
if( strcmp( attr_name, attr->attr[i*2] ) == 0 )
return attr->attr[i*2+1];
}
attr = attr->next;
}
return 0;
}
#define CV_HASHVAL_SCALE 33
CV_IMPL CvStringHashNode*
cvGetHashedKey( CvFileStorage* fs, const char* str, int len, int create_missing )
{
CvStringHashNode* node = 0;
unsigned hashval = 0;
int i, tab_size;
if( !fs )
return 0;
CvStringHash* map = fs->str_hash;
if( len < 0 )
{
for( i = 0; str[i] != '\0'; i++ )
hashval = hashval*CV_HASHVAL_SCALE + (unsigned char)str[i];
len = i;
}
else for( i = 0; i < len; i++ )
hashval = hashval*CV_HASHVAL_SCALE + (unsigned char)str[i];
hashval &= INT_MAX;
tab_size = map->tab_size;
if( (tab_size & (tab_size - 1)) == 0 )
i = (int)(hashval & (tab_size - 1));
else
i = (int)(hashval % tab_size);
for( node = (CvStringHashNode*)(map->table[i]); node != 0; node = node->next )
{
if( node->hashval == hashval &&
node->str.len == len &&
memcmp( node->str.ptr, str, len ) == 0 )
break;
}
if( !node && create_missing )
{
node = (CvStringHashNode*)cvSetNew( (CvSet*)map );
node->hashval = hashval;
node->str = cvMemStorageAllocString( map->storage, str, len );
node->next = (CvStringHashNode*)(map->table[i]);
map->table[i] = node;
}
return node;
}
CV_IMPL CvFileNode*
cvGetFileNode( CvFileStorage* fs, CvFileNode* _map_node,
const CvStringHashNode* key,
int create_missing )
{
CvFileNode* value = 0;
int k = 0, attempts = 1;
if( !fs )
return 0;
CV_CHECK_FILE_STORAGE(fs);
if( !key )
CV_Error( CV_StsNullPtr, "Null key element" );
if( _map_node )
{
if( !fs->roots )
return 0;
attempts = fs->roots->total;
}
for( k = 0; k < attempts; k++ )
{
int i, tab_size;
CvFileNode* map_node = _map_node;
CvFileMapNode* another;
CvFileNodeHash* map;
if( !map_node )
map_node = (CvFileNode*)cvGetSeqElem( fs->roots, k );
CV_Assert(map_node != NULL);
if( !CV_NODE_IS_MAP(map_node->tag) )
{
if( (!CV_NODE_IS_SEQ(map_node->tag) || map_node->data.seq->total != 0) &&
CV_NODE_TYPE(map_node->tag) != CV_NODE_NONE )
CV_Error( CV_StsError, "The node is neither a map nor an empty collection" );
return 0;
}
map = map_node->data.map;
tab_size = map->tab_size;
if( (tab_size & (tab_size - 1)) == 0 )
i = (int)(key->hashval & (tab_size - 1));
else
i = (int)(key->hashval % tab_size);
for( another = (CvFileMapNode*)(map->table[i]); another != 0; another = another->next )
if( another->key == key )
{
if( !create_missing )
{
value = &another->value;
return value;
}
CV_PARSE_ERROR( "Duplicated key" );
}
if( k == attempts - 1 && create_missing )
{
CvFileMapNode* node = (CvFileMapNode*)cvSetNew( (CvSet*)map );
node->key = key;
node->next = (CvFileMapNode*)(map->table[i]);
map->table[i] = node;
value = (CvFileNode*)node;
}
}
return value;
}
CV_IMPL CvFileNode*
cvGetFileNodeByName( const CvFileStorage* fs, const CvFileNode* _map_node, const char* str )
{
CvFileNode* value = 0;
int i, len, tab_size;
unsigned hashval = 0;
int k = 0, attempts = 1;
if( !fs )
return 0;
CV_CHECK_FILE_STORAGE(fs);
if( !str )
CV_Error( CV_StsNullPtr, "Null element name" );
for( i = 0; str[i] != '\0'; i++ )
hashval = hashval*CV_HASHVAL_SCALE + (unsigned char)str[i];
hashval &= INT_MAX;
len = i;
if( !_map_node )
{
if( !fs->roots )
return 0;
attempts = fs->roots->total;
}
for( k = 0; k < attempts; k++ )
{
CvFileNodeHash* map;
const CvFileNode* map_node = _map_node;
CvFileMapNode* another;
if( !map_node )
map_node = (CvFileNode*)cvGetSeqElem( fs->roots, k );
if( !CV_NODE_IS_MAP(map_node->tag) )
{
if( (!CV_NODE_IS_SEQ(map_node->tag) || map_node->data.seq->total != 0) &&
CV_NODE_TYPE(map_node->tag) != CV_NODE_NONE )
CV_Error( CV_StsError, "The node is neither a map nor an empty collection" );
return 0;
}
map = map_node->data.map;
tab_size = map->tab_size;
if( (tab_size & (tab_size - 1)) == 0 )
i = (int)(hashval & (tab_size - 1));
else
i = (int)(hashval % tab_size);
for( another = (CvFileMapNode*)(map->table[i]); another != 0; another = another->next )
{
const CvStringHashNode* key = another->key;
if( key->hashval == hashval &&
key->str.len == len &&
memcmp( key->str.ptr, str, len ) == 0 )
{
value = &another->value;
return value;
}
}
}
return value;
}
CV_IMPL CvFileNode*
cvGetRootFileNode( const CvFileStorage* fs, int stream_index )
{
CV_CHECK_FILE_STORAGE(fs);
if( !fs->roots || (unsigned)stream_index >= (unsigned)fs->roots->total )
return 0;
return (CvFileNode*)cvGetSeqElem( fs->roots, stream_index );
}
CV_IMPL void
cvStartWriteStruct( CvFileStorage* fs, const char* key, int struct_flags,
const char* type_name, CvAttrList /*attributes*/ )
{
CV_CHECK_OUTPUT_FILE_STORAGE(fs);
check_if_write_struct_is_delayed( fs );
if ( fs->state_of_writing_base64 == base64::fs::NotUse )
switch_to_Base64_state( fs, base64::fs::Uncertain );
if ( fs->state_of_writing_base64 == base64::fs::Uncertain
&&
CV_NODE_IS_SEQ(struct_flags)
&&
fs->is_default_using_base64
&&
type_name == 0
)
{
/* Uncertain whether output Base64 data */
make_write_struct_delayed( fs, key, struct_flags, type_name );
}
else if ( type_name && memcmp(type_name, "binary", 6) == 0 )
{
/* Must output Base64 data */
if ( !CV_NODE_IS_SEQ(struct_flags) )
CV_Error( CV_StsBadArg, "must set 'struct_flags |= CV_NODE_SEQ' if using Base64.");
else if ( fs->state_of_writing_base64 != base64::fs::Uncertain )
CV_Error( CV_StsError, "function \'cvStartWriteStruct\' calls cannot be nested if using Base64.");
fs->start_write_struct( fs, key, struct_flags, type_name );
if ( fs->state_of_writing_base64 != base64::fs::Uncertain )
switch_to_Base64_state( fs, base64::fs::Uncertain );
switch_to_Base64_state( fs, base64::fs::InUse );
}
else
{
/* Won't output Base64 data */
if ( fs->state_of_writing_base64 == base64::fs::InUse )
CV_Error( CV_StsError, "At the end of the output Base64, `cvEndWriteStruct` is needed.");
fs->start_write_struct( fs, key, struct_flags, type_name );
if ( fs->state_of_writing_base64 != base64::fs::Uncertain )
switch_to_Base64_state( fs, base64::fs::Uncertain );
switch_to_Base64_state( fs, base64::fs::NotUse );
}
}
CV_IMPL void
cvEndWriteStruct( CvFileStorage* fs )
{
CV_CHECK_OUTPUT_FILE_STORAGE(fs);
check_if_write_struct_is_delayed( fs );
if ( fs->state_of_writing_base64 != base64::fs::Uncertain )
switch_to_Base64_state( fs, base64::fs::Uncertain );
fs->end_write_struct( fs );
}
CV_IMPL void
cvWriteInt( CvFileStorage* fs, const char* key, int value )
{
CV_CHECK_OUTPUT_FILE_STORAGE(fs);
fs->write_int( fs, key, value );
}
CV_IMPL void
cvWriteReal( CvFileStorage* fs, const char* key, double value )
{
CV_CHECK_OUTPUT_FILE_STORAGE(fs);
fs->write_real( fs, key, value );
}
CV_IMPL void
cvWriteString( CvFileStorage* fs, const char* key, const char* value, int quote )
{
CV_CHECK_OUTPUT_FILE_STORAGE(fs);
fs->write_string( fs, key, value, quote );
}
CV_IMPL void
cvWriteComment( CvFileStorage* fs, const char* comment, int eol_comment )
{
CV_CHECK_OUTPUT_FILE_STORAGE(fs);
fs->write_comment( fs, comment, eol_comment );
}
CV_IMPL void
cvStartNextStream( CvFileStorage* fs )
{
CV_CHECK_OUTPUT_FILE_STORAGE(fs);
fs->start_next_stream( fs );
}
CV_IMPL void
cvWriteRawData( CvFileStorage* fs, const void* _data, int len, const char* dt )
{
if (fs->is_default_using_base64 ||
fs->state_of_writing_base64 == base64::fs::InUse )
{
cvWriteRawDataBase64( fs, _data, len, dt );
return;
}
else if ( fs->state_of_writing_base64 == base64::fs::Uncertain )
{
switch_to_Base64_state( fs, base64::fs::NotUse );
}
const char* data0 = (const char*)_data;
int offset = 0;
int fmt_pairs[CV_FS_MAX_FMT_PAIRS*2], k, fmt_pair_count;
char buf[256] = "";
CV_CHECK_OUTPUT_FILE_STORAGE( fs );
if( len < 0 )
CV_Error( CV_StsOutOfRange, "Negative number of elements" );
fmt_pair_count = icvDecodeFormat( dt, fmt_pairs, CV_FS_MAX_FMT_PAIRS );
if( !len )
return;
if( !data0 )
CV_Error( CV_StsNullPtr, "Null data pointer" );
if( fmt_pair_count == 1 )
{
fmt_pairs[0] *= len;
len = 1;
}
for(;len--;)
{
for( k = 0; k < fmt_pair_count; k++ )
{
int i, count = fmt_pairs[k*2];
int elem_type = fmt_pairs[k*2+1];
int elem_size = CV_ELEM_SIZE(elem_type);
const char* data, *ptr;
offset = cvAlign( offset, elem_size );
data = data0 + offset;
for( i = 0; i < count; i++ )
{
switch( elem_type )
{
case CV_8U:
ptr = icv_itoa( *(uchar*)data, buf, 10 );
data++;
break;
case CV_8S:
ptr = icv_itoa( *(char*)data, buf, 10 );
data++;
break;
case CV_16U:
ptr = icv_itoa( *(ushort*)data, buf, 10 );
data += sizeof(ushort);
break;
case CV_16S:
ptr = icv_itoa( *(short*)data, buf, 10 );
data += sizeof(short);
break;
case CV_32S:
ptr = icv_itoa( *(int*)data, buf, 10 );
data += sizeof(int);
break;
case CV_32F:
ptr = icvFloatToString( buf, *(float*)data );
data += sizeof(float);
break;
case CV_64F:
ptr = icvDoubleToString( buf, *(double*)data );
data += sizeof(double);
break;
case CV_USRTYPE1: /* reference */
ptr = icv_itoa( (int)*(size_t*)data, buf, 10 );
data += sizeof(size_t);
break;
default:
CV_Error( CV_StsUnsupportedFormat, "Unsupported type" );
return;
}
if( fs->fmt == CV_STORAGE_FORMAT_XML )
{
int buf_len = (int)strlen(ptr);
icvXMLWriteScalar( fs, 0, ptr, buf_len );
}
else if ( fs->fmt == CV_STORAGE_FORMAT_YAML )
{
icvYMLWrite( fs, 0, ptr );
}
else
{
if( elem_type == CV_32F || elem_type == CV_64F )
{
size_t buf_len = strlen(ptr);
if( buf_len > 0 && ptr[buf_len-1] == '.' )
{
// append zero if CV_32F or CV_64F string ends with decimal place to match JSON standard
// ptr will point to buf, so can write to buf given ptr is const
buf[buf_len] = '0';
buf[buf_len+1] = '\0';
}
}
icvJSONWrite( fs, 0, ptr );
}
}
offset = (int)(data - data0);
}
}
}
CV_IMPL void
cvStartReadRawData( const CvFileStorage* fs, const CvFileNode* src, CvSeqReader* reader )
{
int node_type;
CV_CHECK_FILE_STORAGE( fs );
if( !src || !reader )
CV_Error( CV_StsNullPtr, "Null pointer to source file node or reader" );
node_type = CV_NODE_TYPE(src->tag);
if( node_type == CV_NODE_INT || node_type == CV_NODE_REAL )
{
// emulate reading from 1-element sequence
reader->ptr = (schar*)src;
reader->block_max = reader->ptr + sizeof(*src)*2;
reader->block_min = reader->ptr;
reader->seq = 0;
}
else if( node_type == CV_NODE_SEQ )
{
cvStartReadSeq( src->data.seq, reader, 0 );
}
else if( node_type == CV_NODE_NONE )
{
memset( reader, 0, sizeof(*reader) );
}
else
CV_Error( CV_StsBadArg, "The file node should be a numerical scalar or a sequence" );
}
CV_IMPL void
cvReadRawDataSlice( const CvFileStorage* fs, CvSeqReader* reader,
int len, void* _data, const char* dt )
{
char* data0 = (char*)_data;
int fmt_pairs[CV_FS_MAX_FMT_PAIRS*2], k = 0, fmt_pair_count;
int i = 0, count = 0;
CV_CHECK_FILE_STORAGE( fs );
if( !reader || !data0 )
CV_Error( CV_StsNullPtr, "Null pointer to reader or destination array" );
if( !reader->seq && len != 1 )
CV_Error( CV_StsBadSize, "The read sequence is a scalar, thus len must be 1" );
fmt_pair_count = icvDecodeFormat( dt, fmt_pairs, CV_FS_MAX_FMT_PAIRS );
size_t step = ::icvCalcStructSize(dt, 0);
for(;;)
{
int offset = 0;
for( k = 0; k < fmt_pair_count; k++ )
{
int elem_type = fmt_pairs[k*2+1];
int elem_size = CV_ELEM_SIZE(elem_type);
char* data;
count = fmt_pairs[k*2];
offset = cvAlign( offset, elem_size );
data = data0 + offset;
for( i = 0; i < count; i++ )
{
CvFileNode* node = (CvFileNode*)reader->ptr;
if( CV_NODE_IS_INT(node->tag) )
{
int ival = node->data.i;
switch( elem_type )
{
case CV_8U:
*(uchar*)data = cv::saturate_cast<uchar>(ival);
data++;
break;
case CV_8S:
*(char*)data = cv::saturate_cast<schar>(ival);
data++;
break;
case CV_16U:
*(ushort*)data = cv::saturate_cast<ushort>(ival);
data += sizeof(ushort);
break;
case CV_16S:
*(short*)data = cv::saturate_cast<short>(ival);
data += sizeof(short);
break;
case CV_32S:
*(int*)data = ival;
data += sizeof(int);
break;
case CV_32F:
*(float*)data = (float)ival;
data += sizeof(float);
break;
case CV_64F:
*(double*)data = (double)ival;
data += sizeof(double);
break;
case CV_USRTYPE1: /* reference */
*(size_t*)data = ival;
data += sizeof(size_t);
break;
default:
CV_Error( CV_StsUnsupportedFormat, "Unsupported type" );
return;
}
}
else if( CV_NODE_IS_REAL(node->tag) )
{
double fval = node->data.f;
int ival;
switch( elem_type )
{
case CV_8U:
ival = cvRound(fval);
*(uchar*)data = cv::saturate_cast<uchar>(ival);
data++;
break;
case CV_8S:
ival = cvRound(fval);
*(char*)data = cv::saturate_cast<schar>(ival);
data++;
break;
case CV_16U:
ival = cvRound(fval);
*(ushort*)data = cv::saturate_cast<ushort>(ival);
data += sizeof(ushort);
break;
case CV_16S:
ival = cvRound(fval);
*(short*)data = cv::saturate_cast<short>(ival);
data += sizeof(short);
break;
case CV_32S:
ival = cvRound(fval);
*(int*)data = ival;
data += sizeof(int);
break;
case CV_32F:
*(float*)data = (float)fval;
data += sizeof(float);
break;
case CV_64F:
*(double*)data = fval;
data += sizeof(double);
break;
case CV_USRTYPE1: /* reference */
ival = cvRound(fval);
*(size_t*)data = ival;
data += sizeof(size_t);
break;
default:
CV_Error( CV_StsUnsupportedFormat, "Unsupported type" );
return;
}
}
else
CV_Error( CV_StsError,
"The sequence element is not a numerical scalar" );
CV_NEXT_SEQ_ELEM( sizeof(CvFileNode), *reader );
if( !--len )
goto end_loop;
}
offset = (int)(data - data0);
}
data0 += step;
}
end_loop:
if( i != count - 1 || k != fmt_pair_count - 1 )
CV_Error( CV_StsBadSize,
"The sequence slice does not fit an integer number of records" );
if( !reader->seq )
reader->ptr -= sizeof(CvFileNode);
}
CV_IMPL void
cvReadRawData( const CvFileStorage* fs, const CvFileNode* src,
void* data, const char* dt )
{
CvSeqReader reader;
if( !src || !data )
CV_Error( CV_StsNullPtr, "Null pointers to source file node or destination array" );
cvStartReadRawData( fs, src, &reader );
cvReadRawDataSlice( fs, &reader, CV_NODE_IS_SEQ(src->tag) ?
src->data.seq->total : 1, data, dt );
}
CV_IMPL void
cvWriteFileNode( CvFileStorage* fs, const char* new_node_name,
const CvFileNode* node, int embed )
{
CvFileStorage* dst = 0;
CV_CHECK_OUTPUT_FILE_STORAGE(fs);
if( !node )
return;
if( CV_NODE_IS_COLLECTION(node->tag) && embed )
{
icvWriteCollection( fs, node );
}
else
{
icvWriteFileNode( fs, new_node_name, node );
}
/*
int i, stream_count;
stream_count = fs->roots->total;
for( i = 0; i < stream_count; i++ )
{
CvFileNode* node = (CvFileNode*)cvGetSeqElem( fs->roots, i, 0 );
icvDumpCollection( dst, node );
if( i < stream_count - 1 )
dst->start_next_stream( dst );
}*/
cvReleaseFileStorage( &dst );
}
CV_IMPL const char*
cvGetFileNodeName( const CvFileNode* file_node )
{
return file_node && CV_NODE_HAS_NAME(file_node->tag) ?
((CvFileMapNode*)file_node)->key->str.ptr : 0;
}
CV_IMPL void
cvRegisterType( const CvTypeInfo* _info )
{
CvTypeInfo* info = 0;
int i, len;
char c;
//if( !CvType::first )
// icvCreateStandardTypes();
if( !_info || _info->header_size != sizeof(CvTypeInfo) )
CV_Error( CV_StsBadSize, "Invalid type info" );
if( !_info->is_instance || !_info->release ||
!_info->read || !_info->write )
CV_Error( CV_StsNullPtr,
"Some of required function pointers "
"(is_instance, release, read or write) are NULL");
c = _info->type_name[0];
if( !cv_isalpha(c) && c != '_' )
CV_Error( CV_StsBadArg, "Type name should start with a letter or _" );
len = (int)strlen(_info->type_name);
for( i = 0; i < len; i++ )
{
c = _info->type_name[i];
if( !cv_isalnum(c) && c != '-' && c != '_' )
CV_Error( CV_StsBadArg,
"Type name should contain only letters, digits, - and _" );
}
info = (CvTypeInfo*)cvAlloc( sizeof(*info) + len + 1 );
*info = *_info;
info->type_name = (char*)(info + 1);
memcpy( (char*)info->type_name, _info->type_name, len + 1 );
info->flags = 0;
info->next = CvType::first;
info->prev = 0;
if( CvType::first )
CvType::first->prev = info;
else
CvType::last = info;
CvType::first = info;
}
CV_IMPL void
cvUnregisterType( const char* type_name )
{
CvTypeInfo* info;
info = cvFindType( type_name );
if( info )
{
if( info->prev )
info->prev->next = info->next;
else
CvType::first = info->next;
if( info->next )
info->next->prev = info->prev;
else
CvType::last = info->prev;
if( !CvType::first || !CvType::last )
CvType::first = CvType::last = 0;
cvFree( &info );
}
}
CV_IMPL CvTypeInfo*
cvFirstType( void )
{
return CvType::first;
}
CV_IMPL CvTypeInfo*
cvFindType( const char* type_name )
{
CvTypeInfo* info = 0;
if (type_name)
for( info = CvType::first; info != 0; info = info->next )
if( strcmp( info->type_name, type_name ) == 0 )
break;
return info;
}
CV_IMPL CvTypeInfo*
cvTypeOf( const void* struct_ptr )
{
CvTypeInfo* info = 0;
if( struct_ptr )
{
for( info = CvType::first; info != 0; info = info->next )
if( info->is_instance( struct_ptr ))
break;
}
return info;
}
/* reads matrix, image, sequence, graph etc. */
CV_IMPL void*
cvRead( CvFileStorage* fs, CvFileNode* node, CvAttrList* list )
{
void* obj = 0;
CV_CHECK_FILE_STORAGE( fs );
if( !node )
return 0;
if( !CV_NODE_IS_USER(node->tag) || !node->info )
CV_Error( CV_StsError, "The node does not represent a user object (unknown type?)" );
obj = node->info->read( fs, node );
if( list )
*list = cvAttrList(0,0);
return obj;
}
/* writes matrix, image, sequence, graph etc. */
CV_IMPL void
cvWrite( CvFileStorage* fs, const char* name,
const void* ptr, CvAttrList attributes )
{
CvTypeInfo* info;
CV_CHECK_OUTPUT_FILE_STORAGE( fs );
if( !ptr )
CV_Error( CV_StsNullPtr, "Null pointer to the written object" );
info = cvTypeOf( ptr );
if( !info )
CV_Error( CV_StsBadArg, "Unknown object" );
if( !info->write )
CV_Error( CV_StsBadArg, "The object does not have write function" );
info->write( fs, name, ptr, attributes );
}
/* simple API for reading/writing data */
CV_IMPL void
cvSave( const char* filename, const void* struct_ptr,
const char* _name, const char* comment, CvAttrList attributes )
{
CvFileStorage* fs = 0;
if( !struct_ptr )
CV_Error( CV_StsNullPtr, "NULL object pointer" );
fs = cvOpenFileStorage( filename, 0, CV_STORAGE_WRITE );
if( !fs )
CV_Error( CV_StsError, "Could not open the file storage. Check the path and permissions" );
cv::String name = _name ? cv::String(_name) : cv::FileStorage::getDefaultObjectName(filename);
if( comment )
cvWriteComment( fs, comment, 0 );
cvWrite( fs, name.c_str(), struct_ptr, attributes );
cvReleaseFileStorage( &fs );
}