mirror of https://github.com/google/pebble
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
|
|
* Copyright 2024 Google LLC
|
|
*
|
|
* Licensed 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 "stringlist.h"
|
|
|
|
#include "util/math.h"
|
|
#include "util/string.h"
|
|
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
|
|
size_t string_list_count(StringList *list) {
|
|
if (!list || list->serialized_byte_length == 0) {
|
|
return 0;
|
|
}
|
|
|
|
size_t result = 1;
|
|
for (int i = 0; i < list->serialized_byte_length; i++) {
|
|
if (list->data[i] == '\0') {
|
|
result++;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
char *string_list_get_at(StringList *list, size_t index) {
|
|
if (!list) {
|
|
return NULL;
|
|
}
|
|
|
|
char *ptr = list->data;
|
|
const char *max_ptr = ptr + list->serialized_byte_length;
|
|
while (index > 0 && ptr < max_ptr) {
|
|
ptr += strlen(ptr) + 1;
|
|
index--;
|
|
}
|
|
|
|
if (index > 0) {
|
|
return NULL;
|
|
} else {
|
|
return ptr;
|
|
}
|
|
}
|
|
|
|
int string_list_add_string(StringList *list, size_t max_list_size, const char *buffer,
|
|
size_t max_str_size) {
|
|
if (!list) {
|
|
return 0;
|
|
}
|
|
|
|
const size_t str_length = strnlen(buffer, max_str_size);
|
|
const int size_remaining =
|
|
max_list_size - (sizeof(StringList) + list->serialized_byte_length + 1);
|
|
if (size_remaining <= 0) {
|
|
return 0;
|
|
}
|
|
const bool has_last_terminator = (list->serialized_byte_length > 0);
|
|
char *cursor = &list->data[list->serialized_byte_length + (has_last_terminator ? 1 : 0)];
|
|
const size_t bytes_written = MIN(str_length, (size_t)size_remaining - 1);
|
|
strncpy(cursor, buffer, bytes_written);
|
|
cursor[bytes_written] = '\0';
|
|
list->serialized_byte_length += (has_last_terminator ? 1 : 0) + bytes_written;
|
|
return bytes_written;
|
|
}
|