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Diffstat (limited to 'template.c')
| -rw-r--r-- | template.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/template.c b/template.c new file mode 100644 index 0000000..f6a55b2 --- /dev/null +++ b/template.c @@ -0,0 +1,157 @@ +/* + * Copyright 2023, Vincent Douillet <vincent@vdouillet.fr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * 3. Neither the name of the copyright holder nor the names of its contributors + * may be used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "config.h" +#include "template.h" +#include "url.h" + +/* + * Reads the file denoted by path into a newly allocated output buffer. Returns + * 0 for success, -1 for error. The size_t is the size of output buffer (only + * to be used in case of success). + */ +static int +read_file(char *path, char **output, size_t * read_size) +{ + long file_size; + FILE *fp; + + fp = fopen(path, "r"); + if (fp == NULL) + return -1; + + /* get file size */ + if (fseek(fp, 0L, SEEK_END) != 0) + return -1; + + file_size = ftell(fp); + if (file_size < 0) + return -1; + + /* rewind to file start */ + if (fseek(fp, 0L, SEEK_SET) != 0) + return -1; + + /* create output buffer */ + *output = malloc(sizeof(char) * (file_size + 1)); + if (*output == NULL) + return -1; + + /* read the file */ + *read_size = fread(*output, sizeof(char), file_size, fp); + if (*read_size == 0 || ferror(fp) != 0) { + free(*output); + return -1; + } + /* enforce string termination */ + (*output)[*read_size] = '\0'; + + return 0; +} + +struct page_template * +page_template_new(char *page) +{ + struct page_template *tmpl; + char template_path[PATH_MAX]; + size_t path_size; + size_t file_size; + + tmpl = (struct page_template *) calloc(1, sizeof(struct page_template)); + if (tmpl == NULL) + return NULL; + + /* read global header */ + path_size = snprintf(template_path, sizeof(template_path), "%s/%s", + TEMPLATE_DIR, "head.html"); + if (path_size < 0 || path_size >= sizeof(template_path) || + read_file(template_path, &tmpl->header, &file_size) < 0) { + page_template_free(tmpl); + return NULL; + } + /* read global footer */ + path_size = snprintf(template_path, sizeof(template_path), "%s/%s", + TEMPLATE_DIR, "foot.html"); + if (path_size < 0 || path_size >= sizeof(template_path) || + read_file(template_path, &tmpl->footer, &file_size) < 0) { + page_template_free(tmpl); + return NULL; + } + /* read page header */ + path_size = snprintf(template_path, sizeof(template_path), "%s/%s_%s", + TEMPLATE_DIR, page, "head.html"); + if (path_size < 0 || path_size >= sizeof(template_path) || + read_file(template_path, &tmpl->page_header, &file_size) < 0) { + page_template_free(tmpl); + return NULL; + } + /* read page footer */ + path_size = snprintf(template_path, sizeof(template_path), "%s/%s_%s", + TEMPLATE_DIR, page, "foot.html"); + if (path_size < 0 || path_size >= sizeof(template_path) || + read_file(template_path, &tmpl->page_footer, &file_size) < 0) { + page_template_free(tmpl); + return NULL; + } + /* read page item */ + path_size = snprintf(template_path, sizeof(template_path), "%s/%s_%s", + TEMPLATE_DIR, page, "item.html"); + if (path_size < 0 || path_size >= sizeof(template_path) || + read_file(template_path, &tmpl->page_item, &file_size) < 0) { + page_template_free(tmpl); + return NULL; + } + return tmpl; +} + +void +page_template_free(struct page_template * tmpl) +{ + if (tmpl == NULL) + return; + + if (tmpl->header != NULL) + free(tmpl->header); + if (tmpl->footer != NULL) + free(tmpl->footer); + if (tmpl->page_header != NULL) + free(tmpl->page_header); + if (tmpl->page_footer != NULL) + free(tmpl->page_footer); + if (tmpl->page_item != NULL) + free(tmpl->page_item); + + free(tmpl); +} |