| /**************************************************************************** |
| * apps/testing/fopencookie/fopencookie.c |
| * |
| * 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. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| |
| #include <sys/stat.h> |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| |
| /**************************************************************************** |
| * Pre-processor Definitions |
| ****************************************************************************/ |
| |
| #define BUF_SIZE 32 |
| |
| /**************************************************************************** |
| * Private data |
| ****************************************************************************/ |
| |
| struct my_cookie |
| { |
| char *buf; |
| size_t endpos; |
| size_t bufsize; |
| off_t offset; |
| }; |
| |
| static const char correctbuf[] = "abcdefghijklmnopqrstuvwxyz"; |
| |
| /**************************************************************************** |
| * Private Functions |
| ****************************************************************************/ |
| |
| ssize_t fopencookie_write_hook(void *c, const char *buf, size_t size) |
| { |
| char *new_buff; |
| off_t realloc_size; |
| struct my_cookie *cookie = (struct my_cookie *)c; |
| |
| DEBUGASSERT(c != NULL); |
| |
| if (size + cookie->offset > cookie->bufsize) |
| { |
| realloc_size = size + cookie->offset - cookie->bufsize + 1; |
| new_buff = realloc(cookie->buf, realloc_size); |
| if (new_buff == NULL) |
| { |
| fprintf(stderr, "ERROR: Cannot reallocate memory!\n"); |
| return -1; |
| } |
| |
| cookie->buf = new_buff; |
| cookie->bufsize = realloc_size; |
| } |
| |
| memcpy(cookie->buf + cookie->offset, buf, size); |
| |
| cookie->offset += size; |
| if (cookie->offset > cookie->endpos) |
| { |
| cookie->endpos = cookie->offset; |
| } |
| |
| return size; |
| } |
| |
| ssize_t fopencookie_read_hook(void *c, char *buf, size_t size) |
| { |
| struct my_cookie *cookie = (struct my_cookie *)c; |
| |
| if (cookie->offset + size > cookie->endpos) |
| { |
| size = cookie->endpos - cookie->offset; |
| } |
| |
| if (size < 0) |
| { |
| size = 0; |
| } |
| |
| memcpy(buf, cookie->buf + cookie->offset, size); |
| |
| cookie->offset += size; |
| return size; |
| } |
| |
| off_t fopencookie_seek_hook(void *c, off_t *offset, int whence) |
| { |
| off_t new_offset; |
| struct my_cookie *cookie = (struct my_cookie *)c; |
| |
| if (whence == SEEK_SET) |
| { |
| new_offset = *offset; |
| } |
| |
| else if (whence == SEEK_END) |
| { |
| new_offset = cookie->endpos + *offset; |
| } |
| |
| else if (whence == SEEK_CUR) |
| { |
| new_offset = cookie->offset + *offset; |
| } |
| |
| else |
| { |
| return -1; |
| } |
| |
| if (new_offset < 0) |
| { |
| return -1; |
| } |
| |
| cookie->offset = new_offset; |
| *offset = new_offset; |
| return new_offset; |
| } |
| |
| int fopencookie_close_hook(void *c) |
| { |
| struct my_cookie *cookie = (struct my_cookie *)c; |
| |
| cookie->bufsize = 0; |
| |
| return OK; |
| } |
| |
| /**************************************************************************** |
| * Name: fopencookie_write_test |
| ****************************************************************************/ |
| |
| static int fopencookie_write_test(FILE *stream) |
| { |
| int n; |
| |
| n = fputs(correctbuf, stream); |
| if (n < 0) |
| { |
| printf("fopencookie_write_test: fputs failed: %d\n", -errno); |
| return -1; |
| } |
| |
| printf("fopencookie_write_test: written buffer: %.*s\n", n, correctbuf); |
| printf("fopencookie_write_test: succesfull\n"); |
| return 0; |
| } |
| |
| /**************************************************************************** |
| * Name: fopencookie_write_test |
| ****************************************************************************/ |
| |
| static int fopencookie_read_test(FILE *stream) |
| { |
| int n; |
| int endpos; |
| char buf[256]; |
| |
| fseek(stream, 0, SEEK_END); |
| endpos = ftell(stream); |
| fseek(stream, 0, SEEK_SET); |
| |
| n = fread(buf, 1, endpos, stream); |
| |
| for (int i = 0; i < n; i++) |
| { |
| if (correctbuf[i] != buf[i]) |
| { |
| printf("fopencookie_write_test: error %d got %c, expected %c\n", i, |
| buf[i], correctbuf[i]); |
| return -1; |
| } |
| } |
| |
| printf("fopencookie_read_test: read buffer: %.*s\n", n, correctbuf); |
| printf("fopencookie_read_test: succesfull\n"); |
| return 0; |
| } |
| |
| /**************************************************************************** |
| * Name: fopencookie_seek_test |
| ****************************************************************************/ |
| |
| static int fopencookie_seek_test(FILE *stream) |
| { |
| int endpos; |
| int i; |
| int n; |
| char buf[1]; |
| |
| fseek(stream, 0, SEEK_END); |
| endpos = ftell(stream); |
| fseek(stream, 0, SEEK_SET); |
| |
| for (i = 0; i < endpos; i += 2) |
| { |
| fseek(stream, i, SEEK_SET); |
| n = fread(buf, 1, 1, stream); |
| if (n != 1) |
| { |
| printf("fopencookie_seek_test: read at %i failed\n", i); |
| } |
| |
| if (correctbuf[i] != buf[0]) |
| { |
| printf("fopencookie_seek_test: error %d got %c, expected %c\n", i, |
| buf[0], correctbuf[i]); |
| return -1; |
| } |
| |
| printf("fopencookie_seek_test: pos %d, char %c\n", i, buf[i]); |
| } |
| |
| printf("fopencookie_seek_test: succesfull\n"); |
| |
| fseek(stream, 0, SEEK_SET); |
| return 0; |
| } |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| int main(int argc, FAR char *argv[]) |
| { |
| int ret; |
| FILE *stream; |
| struct my_cookie mycookie; |
| cookie_io_functions_t cookie_funcs = |
| { |
| .read = fopencookie_read_hook, |
| .write = fopencookie_write_hook, |
| .seek = fopencookie_seek_hook, |
| .close = fopencookie_close_hook |
| }; |
| |
| /* Set up the cookie before calling fopencookie(). */ |
| |
| mycookie.buf = malloc(BUF_SIZE); |
| if (mycookie.buf == NULL) |
| { |
| printf("Could not allocate memory for cookie.\n"); |
| return -1; |
| } |
| |
| mycookie.bufsize = BUF_SIZE; |
| mycookie.offset = 0; |
| mycookie.endpos = 0; |
| |
| stream = fopencookie(&mycookie, "w+", cookie_funcs); |
| if (stream == NULL) |
| { |
| free(mycookie.buf); |
| return -1; |
| } |
| |
| ret = fopencookie_write_test(stream); |
| if (ret < 0) |
| { |
| goto fopencookie_ret; |
| } |
| |
| ret = fopencookie_read_test(stream); |
| if (ret < 0) |
| { |
| goto fopencookie_ret; |
| } |
| |
| ret = fopencookie_seek_test(stream); |
| if (ret < 0) |
| { |
| goto fopencookie_ret; |
| } |
| |
| printf("fopencokie tests were succesfull.\n"); |
| |
| fopencookie_ret: |
| fclose(stream); |
| free(mycookie.buf); |
| |
| return ret; |
| } |