| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include <qpid/dispatch/iterator.h> |
| #include <qpid/dispatch/ctools.h> |
| #include <qpid/dispatch/alloc.h> |
| #include "message_private.h" |
| #include <stdio.h> |
| #include <string.h> |
| |
| typedef enum { |
| MODE_TO_END, |
| MODE_TO_SLASH |
| } parse_mode_t; |
| |
| struct dx_field_iterator_t { |
| dx_buffer_t *start_buffer; |
| unsigned char *start_cursor; |
| int start_length; |
| dx_buffer_t *buffer; |
| unsigned char *cursor; |
| int length; |
| dx_iterator_view_t view; |
| parse_mode_t mode; |
| }; |
| |
| |
| ALLOC_DECLARE(dx_field_iterator_t); |
| ALLOC_DEFINE(dx_field_iterator_t); |
| |
| |
| typedef enum { |
| STATE_START, |
| STATE_SLASH_LEFT, |
| STATE_SKIPPING_TO_NEXT_SLASH, |
| STATE_SCANNING, |
| STATE_COLON, |
| STATE_COLON_SLASH, |
| STATE_AT_NODE_ID |
| } state_t; |
| |
| |
| static void view_initialize(dx_field_iterator_t *iter) |
| { |
| if (iter->view == ITER_VIEW_ALL) { |
| iter->mode = MODE_TO_END; |
| return; |
| } |
| |
| // |
| // Advance to the node-id. |
| // |
| state_t state = STATE_START; |
| unsigned int octet; |
| while (!dx_field_iterator_end(iter) && state != STATE_AT_NODE_ID) { |
| octet = dx_field_iterator_octet(iter); |
| switch (state) { |
| case STATE_START : |
| if (octet == '/') |
| state = STATE_SLASH_LEFT; |
| else |
| state = STATE_SCANNING; |
| break; |
| |
| case STATE_SLASH_LEFT : |
| if (octet == '/') |
| state = STATE_SKIPPING_TO_NEXT_SLASH; |
| else |
| state = STATE_AT_NODE_ID; |
| break; |
| |
| case STATE_SKIPPING_TO_NEXT_SLASH : |
| if (octet == '/') |
| state = STATE_AT_NODE_ID; |
| break; |
| |
| case STATE_SCANNING : |
| if (octet == ':') |
| state = STATE_COLON; |
| break; |
| |
| case STATE_COLON : |
| if (octet == '/') |
| state = STATE_COLON_SLASH; |
| else |
| state = STATE_SCANNING; |
| break; |
| |
| case STATE_COLON_SLASH : |
| if (octet == '/') |
| state = STATE_SKIPPING_TO_NEXT_SLASH; |
| else |
| state = STATE_SCANNING; |
| break; |
| |
| case STATE_AT_NODE_ID : |
| break; |
| } |
| } |
| |
| if (state != STATE_AT_NODE_ID) { |
| // |
| // The address string was relative, not absolute. The node-id |
| // is at the beginning of the string. |
| // |
| iter->buffer = iter->start_buffer; |
| iter->cursor = iter->start_cursor; |
| iter->length = iter->start_length; |
| } |
| |
| // |
| // Cursor is now on the first octet of the node-id |
| // |
| if (iter->view == ITER_VIEW_NODE_ID) { |
| iter->mode = MODE_TO_SLASH; |
| return; |
| } |
| |
| if (iter->view == ITER_VIEW_NO_HOST) { |
| iter->mode = MODE_TO_END; |
| return; |
| } |
| |
| if (iter->view == ITER_VIEW_NODE_SPECIFIC) { |
| iter->mode = MODE_TO_END; |
| while (!dx_field_iterator_end(iter)) { |
| octet = dx_field_iterator_octet(iter); |
| if (octet == '/') |
| break; |
| } |
| return; |
| } |
| } |
| |
| |
| dx_field_iterator_t* dx_field_iterator_string(const char *text, dx_iterator_view_t view) |
| { |
| dx_field_iterator_t *iter = new_dx_field_iterator_t(); |
| if (!iter) |
| return 0; |
| |
| iter->start_buffer = 0; |
| iter->start_cursor = (unsigned char*) text; |
| iter->start_length = strlen(text); |
| |
| dx_field_iterator_reset(iter, view); |
| |
| return iter; |
| } |
| |
| |
| dx_field_iterator_t *dx_field_iterator_buffer(dx_buffer_t *buffer, int offset, int length, dx_iterator_view_t view) |
| { |
| dx_field_iterator_t *iter = new_dx_field_iterator_t(); |
| if (!iter) |
| return 0; |
| |
| iter->start_buffer = buffer; |
| iter->start_cursor = dx_buffer_base(buffer) + offset; |
| iter->start_length = length; |
| |
| dx_field_iterator_reset(iter, view); |
| |
| return iter; |
| } |
| |
| |
| void dx_field_iterator_free(dx_field_iterator_t *iter) |
| { |
| free_dx_field_iterator_t(iter); |
| } |
| |
| |
| void dx_field_iterator_reset(dx_field_iterator_t *iter, dx_iterator_view_t view) |
| { |
| iter->buffer = iter->start_buffer; |
| iter->cursor = iter->start_cursor; |
| iter->length = iter->start_length; |
| iter->view = view; |
| |
| view_initialize(iter); |
| } |
| |
| |
| unsigned char dx_field_iterator_octet(dx_field_iterator_t *iter) |
| { |
| if (iter->length == 0) |
| return (unsigned char) 0; |
| |
| unsigned char result = *(iter->cursor); |
| |
| iter->cursor++; |
| iter->length--; |
| |
| if (iter->length > 0) { |
| if (iter->buffer) { |
| if (iter->cursor - dx_buffer_base(iter->buffer) == dx_buffer_size(iter->buffer)) { |
| iter->buffer = iter->buffer->next; |
| if (iter->buffer == 0) |
| iter->length = 0; |
| iter->cursor = dx_buffer_base(iter->buffer); |
| } |
| } |
| } |
| |
| if (iter->length && iter->mode == MODE_TO_SLASH && *(iter->cursor) == '/') |
| iter->length = 0; |
| |
| return result; |
| } |
| |
| |
| int dx_field_iterator_end(dx_field_iterator_t *iter) |
| { |
| return iter->length == 0; |
| } |
| |
| |
| int dx_field_iterator_equal(dx_field_iterator_t *iter, unsigned char *string) |
| { |
| dx_field_iterator_reset(iter, iter->view); |
| while (!dx_field_iterator_end(iter) && *string) { |
| if (*string != dx_field_iterator_octet(iter)) |
| return 0; |
| string++; |
| } |
| |
| return (dx_field_iterator_end(iter) && (*string == 0)); |
| } |
| |
| |
| unsigned char *dx_field_iterator_copy(dx_field_iterator_t *iter) |
| { |
| int length = 0; |
| int idx = 0; |
| unsigned char *copy; |
| |
| dx_field_iterator_reset(iter, iter->view); |
| while (!dx_field_iterator_end(iter)) { |
| dx_field_iterator_octet(iter); |
| length++; |
| } |
| |
| dx_field_iterator_reset(iter, iter->view); |
| copy = (unsigned char*) malloc(length + 1); |
| while (!dx_field_iterator_end(iter)) |
| copy[idx++] = dx_field_iterator_octet(iter); |
| copy[idx] = '\0'; |
| |
| return copy; |
| } |
| |