opc_part.c

Demonstrates how to dump a part from an OPC container. Ussage opc_dump [container] [part-name]. E.g. opc_dump sample.docx "word/document.xml".

/*
    Dump content of a part using either the binary or the XML interfaces.

    Ussage:
    opc_part FILENAME PARTNAME

    Sample:
    opc_part OOXMLI1.docx "word/document.xml"
*/

#include <opc/opc.h>
#include <stdio.h>
#include <time.h>
#ifdef WIN32
#include <crtdbg.h>
#endif

int main( int argc, const char* argv[] )
{
#ifdef WIN32
     _CrtSetDbgFlag (_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
#endif
    opcInitLibrary();
    opcContainer *c=opcContainerOpen(_X(argv[1]), OPC_OPEN_READ_ONLY, NULL, NULL);
    if (NULL!=c) {
        opcPart part=opcPartFind(c, _X(argv[2]), NULL, 0);
        if (OPC_PART_INVALID!=part) {
            const xmlChar *type=opcPartGetType(c, part);
            opc_uint32_t type_len=xmlStrlen(type);
            opc_bool_t is_xml=NULL!=type && type_len>=3 && 'x'==type[type_len-3] && 'm'==type[type_len-2] && 'l'==type[type_len-1];
            fprintf(stderr, "type=%s is_xml=%i\n", type, is_xml);
            if (is_xml) {
                mceTextReader_t reader;
                if (OPC_ERROR_NONE==opcXmlReaderOpen(c, &reader, part, NULL, 0, 0)) {
                    xmlTextWriter *writer=xmlNewTextWriterFile(NULL);
                    xmlTextWriterSetIndent(writer, 1);
                    if (NULL!=writer) {
                        mceTextReaderDump(&reader, writer, 1);
                    }
                    xmlFreeTextWriter(writer);
                    mceTextReaderCleanup(&reader);
                }
            } else  {
                opcContainerInputStream *stream=opcContainerOpenInputStream(c, part);
                if (NULL!=stream) {
                    opc_uint32_t ret=0;
                    opc_uint8_t buf[100];
                    while((ret=opcContainerReadInputStream(stream, buf, sizeof(buf)))>0) {
                        fwrite(buf, sizeof(opc_uint8_t), ret, stdout);
                    }
                    opcContainerCloseInputStream(stream);
                }
            }
        }
        opcContainerClose(c, OPC_CLOSE_NOW);
    }
    opcFreeLibrary();
#ifdef WIN32
    OPC_ASSERT(!_CrtDumpMemoryLeaks());
#endif
    return 0;
}