void streamCurrentProcessCommandLineImpl()

in agent/native/ext/platform.cpp [269:320]
46 lines of code
8 McCabe index (conditional complexity)

void streamCurrentProcessCommandLineImpl( TextOutputStream* txtOutStream, size_t maxLength, FILE* procSelfCmdLineFile )
{
    ELASTIC_APM_ASSERT_VALID_PTR( txtOutStream );
    ELASTIC_APM_ASSERT_VALID_PTR( procSelfCmdLineFile );

    enum { auxBufferSize = 100 };
    char auxBuffer[ auxBufferSize ];
    bool reachedEndOfFile = false;
    bool isRightAfterSeparator = false;
    size_t numberOfCharsProcessed = 0;
    while ( ! reachedEndOfFile )
    {
        size_t actuallyReadBytes = fread( auxBuffer, /* data item size: */ 1, /* max data items count: */ auxBufferSize, procSelfCmdLineFile );
        if ( actuallyReadBytes < auxBufferSize )
        {
            if ( ferror( procSelfCmdLineFile ) != 0 )
            {
                streamPrintf( txtOutStream, "<Failed to read from %s>", g_procSelfCmdLineFileName );
                return;
            }

            reachedEndOfFile = ( feof( procSelfCmdLineFile ) != 0 );
            if ( ! reachedEndOfFile )
            {
                streamPrintf( txtOutStream, "<fread did not read full buffer from %s but feof() returned false>", g_procSelfCmdLineFileName );
                return;
            }
        }

        ELASTIC_APM_FOR_EACH_INDEX( i, actuallyReadBytes )
        {
            if ( auxBuffer[ i ] == '\0' )
            {
                isRightAfterSeparator = true;
                continue;
            }

            if ( isRightAfterSeparator )
            {
                streamCharUpToMaxLength( txtOutStream, ' ', maxLength, &numberOfCharsProcessed );
                isRightAfterSeparator = false;
            }

            streamCharUpToMaxLength( txtOutStream, auxBuffer[ i ], maxLength, &numberOfCharsProcessed );
        }
    }

    if ( numberOfCharsProcessed > maxLength )
    {
        streamPrintf( txtOutStream, " <skipped remaining %" PRIu64 " characters>", (UInt64)( numberOfCharsProcessed - maxLength ) );
    }
}