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