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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [imfs_gtkn.c] - Rev 173
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/* * IMFS_get_token * * Routine to get a token (name or separator) from the path * the length of the token is returned in token_len. * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: imfs_gtkn.c,v 1.2 2001-09-27 12:01:15 chris Exp $ */ #include <stdlib.h> #include "imfs.h" #include "libio_.h" IMFS_token_types IMFS_get_token( const char *path, char *token, int *token_len ) { register int i = 0; IMFS_token_types type = IMFS_NAME; register char c; /* * Copy a name into token. (Remember NULL is a token.) */ c = path[i]; while ( (!IMFS_is_separator(c)) && (i <= IMFS_NAME_MAX) ) { token[i] = c; if ( i == IMFS_NAME_MAX ) return IMFS_INVALID_TOKEN; if ( !IMFS_is_valid_name_char(c) ) type = IMFS_INVALID_TOKEN; c = path [++i]; } /* * Copy a seperator into token. */ if ( i == 0 ) { token[i] = c; if ( token[i] != '\0' ) { i++; type = IMFS_CURRENT_DIR; } else { type = IMFS_NO_MORE_PATH; } } else if (token[ i-1 ] != '\0') { token[i] = '\0'; } /* * Set token_len to the number of characters copied. */ *token_len = i; /* * If we copied something that was not a seperator see if * it was a special name. */ if ( type == IMFS_NAME ) { if ( strcmp( token, "..") == 0 ) type = IMFS_UP_DIR; else if ( strcmp( token, "." ) == 0 ) type = IMFS_CURRENT_DIR; } return type; }