./Source/directory.c

Directory/RB_Is_Source_File [ Functions ]

NAME

RB_Is_Source_File -- Is a file a sourcefile?

SYNOPSIS

int RB_Is_Source_File(
    struct RB_Path *path,
    char *filename )

FUNCTION

This functions examines the content of a file to see whether or not it is a sourcefile.

Currently it checks if there are no nul characters in the first 8191 characters of the file.

SOURCE

{
    int                 is_source = 1;

    if ( RB_Not_Accepted( filename ) )
    {
        /* File needs to be skipped based on it's name */
        is_source = 0;
    }
    else
    {
        unsigned int        size = 0;

        /* Compute the length of the filename including
           the path. */
        size += strlen( path->name );
        size += 1;
        size += strlen( filename );
        if ( size < RB_CBUFFERSIZE )
        {
            FILE               *file;

            /* We use the content_buffer buffer temporarily to
               store the filename. */
            content_buffer[0] = '\0';
            strcat( content_buffer, path->name );
            strcat( content_buffer, filename );
            if ( ( file = fopen( content_buffer, "rb" ) ) )
            {
                int                 no_read;
                no_read =
                    fread( content_buffer, sizeof( char ), RB_CBUFFERSIZE,
                           file );
                if ( no_read > 10 )
                {
                    char               *c;

                    for ( c = content_buffer; no_read; --no_read, c++ )
                    {
                        if ( *c == 0 )
                        {
                            is_source = 0;
                            break;
                        }
                    }
                }
                else
                {
                    /* A file with only 9 characters can not
                       contain any source plus documentation. */
                    is_source = 0;
                }
                fclose( file );
            }
            else
            {
                /* The file could not be opened.   */
                is_source = 0;
            }
        }
        else
        {
            /* The filename is longer than 8191 characters,
               that's way too long... so we skip it. */
            is_source = 0;
        }
    }
    return is_source;
}