static SigV4Status_t generateCanonicalQuery()

in source/sigv4.c [2077:2123]
33 lines of code
6 McCabe index (conditional complexity)

    static SigV4Status_t generateCanonicalQuery( const char * pQuery,
                                                 size_t queryLen,
                                                 const bool doubleEncodeEqualsInParmsValues,
                                                 CanonicalContext_t * pCanonicalContext )
    {
        SigV4Status_t returnStatus = SigV4Success;
        size_t numberOfParameters = 0U;

        assert( pCanonicalContext != NULL );

        if( pQuery != NULL )
        {
            returnStatus = parseQueryString( pQuery, queryLen, &numberOfParameters, pCanonicalContext );
        }

        if( ( returnStatus == SigV4Success ) && ( numberOfParameters > 0U ) )
        {
            /* Sort the parameter names by character code point in ascending order.
             * Parameters with duplicate names should be sorted by value. */
            quickSort( pCanonicalContext->pQueryLoc, numberOfParameters, sizeof( SigV4KeyValuePair_t ), cmpQueryFieldValue );

            /* URI-encode each parameter name and value according to the following rules specified for SigV4:
             *  - Do not URI-encode any of the unreserved characters that RFC 3986 defines:
             *      A-Z, a-z, 0-9, hyphen ( - ), underscore ( _ ), period ( . ), and tilde ( ~ ).
             *  - Percent-encode all other characters with %XY, where X and Y are hexadecimal characters (0-9 and uppercase A-F).
             */
            returnStatus = writeCanonicalQueryParameters( pCanonicalContext, numberOfParameters, doubleEncodeEqualsInParmsValues );
        }

        if( returnStatus == SigV4Success )
        {
            if( pCanonicalContext->bufRemaining > 0U )
            {
                /* Append a linefeed at the end. */
                ( ( char * ) ( pCanonicalContext->pBufProcessing ) )[ pCanonicalContext->uxCursorIndex ] = LINEFEED_CHAR;
                pCanonicalContext->uxCursorIndex++;
                pCanonicalContext->bufRemaining -= 1U;
            }
            else
            {
                returnStatus = SigV4InsufficientMemory;
                LOG_INSUFFICIENT_MEMORY_ERROR( "write newline character after canonical query", 1U );
            }
        }

        return returnStatus;
    }