CciElement* cpiRootElement( int* returnCode, CciParser* parser);
返回根语法元素的地址。如果发生错误,则会返回零(CCI_NULL_ADDR),并且 returnCode 会表明发生错误的原因。
此示例取自样本解析器文件 BipSampPluginParser.c(428 行到 470 行):
int cpiParseBufferEncoded( CciParser* parser, CciContext* context, int encoding, int ccsid ){ PARSER_CONTEXT_ST* pc = (PARSER_CONTEXT_ST *)context ; int rc; /* Get a pointer to the message buffer and set the offset */ pc->iBuffer = (void *)cpiBufferPointer(&rc, parser); pc->iIndex = 0; /* Save the format of the buffer */ pc->iEncoding = encoding; pc->iCcsid = ccsid; /* Save size of the buffer */ pc->iSize = cpiBufferSize(&rc, parser); /* Prime the first byte in the stream */ pc->iCurrentCharacter = cpiBufferByte(&rc, parser, pc->iIndex); /* Set the current element to the root element */ pc->iCurrentElement = cpiRootElement(&rc, parser); /* Reset flag to ensure parsing is reset correctly */ pc->iInTag = 0; /* We will assume ownership of the remainder of the buffer */ return(pc->iSize); }