/* vi: set sw=4 ts=4: *//* * Utility routines. * * Copyright (C) many different people.  If you wrote this, please * acknowledge your work. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */#include <stdlib.h>#include <string.h>#include "libbb.h"/* * Gets the next package field from package_buffer, seperated into the field name * and field value, it returns the int offset to the first character of the next field */int read_package_field(const char *package_buffer, char **field_name, char **field_value){	int offset_name_start = 0;	int offset_name_end = 0;	int offset_value_start = 0;	int offset_value_end = 0;	int offset = 0;	int next_offset;	int name_length;	int value_length;	int exit_flag = FALSE;	if (package_buffer == NULL) {		*field_name = NULL;		*field_value = NULL;		return(-1);	}	while (1) {		next_offset = offset + 1;		switch (package_buffer[offset]) {			case('\0'):				exit_flag = TRUE;				break;			case(':'):				if (offset_name_end == 0) {					offset_name_end = offset;					offset_value_start = next_offset;				}				/* TODO: Name might still have trailing spaces if ':' isnt				 * immediately after name */				break;			case('\n'):				/* TODO: The char next_offset may be out of bounds */				if (package_buffer[next_offset] != ' ') {					exit_flag = TRUE;					break;				}			case('\t'):			case(' '):				/* increment the value start point if its a just filler */				if (offset_name_start == offset) {					offset_name_start++;				}				if (offset_value_start == offset) {					offset_value_start++;				}				break;		}		if (exit_flag == TRUE) {			/* Check that the names are valid */			offset_value_end = offset;			name_length = offset_name_end - offset_name_start;			value_length = offset_value_end - offset_value_start;			if (name_length == 0) {				break;			}			if ((name_length > 0) && (value_length > 0)) {				break;			}			/* If not valid, start fresh with next field */			exit_flag = FALSE;			offset_name_start = offset + 1;			offset_name_end = 0;			offset_value_start = offset + 1;			offset_value_end = offset + 1;			offset++;		}		offset++;	}	if (name_length == 0) {		*field_name = NULL;	} else {		*field_name = xstrndup(&package_buffer[offset_name_start], name_length);	}	if (value_length > 0) {		*field_value = xstrndup(&package_buffer[offset_value_start], value_length);	} else {		*field_value = NULL;	}	return(next_offset);}