--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libsci/util.c	Thu Aug 04 16:47:10 2022 +0200
@@ -0,0 +1,215 @@
+/*
+ * util.c -- miscellaneous utilities
+ *
+ * Copyright (c) 2021-2022 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/stat.h>
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libgen.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "util.h"
+
+void *
+util_malloc(size_t size)
+{
+	void *ret;
+
+	if (!(ret = malloc(size)))
+		util_die("malloc: %s\n", strerror(errno));
+
+	return ret;
+}
+
+void *
+util_calloc(size_t n, size_t size)
+{
+	void *ret;
+
+	if (!(ret = calloc(n, size)))
+		util_die("calloc: %s\n", strerror(errno));
+
+	return ret;
+}
+
+void *
+util_realloc(void *ptr, size_t size)
+{
+	void *ret;
+
+	if (!(ret = realloc(ptr, size)) && size)
+		util_die("realloc: %s\n", strerror(errno));
+
+	return ret;
+}
+
+void *
+util_memdup(const void *ptr, size_t size)
+{
+	void *ret;
+
+	if (!(ret = malloc(size)))
+		util_die("malloc: %s\n", strerror(errno));
+
+	return memcpy(ret, ptr, size);
+}
+
+char *
+util_strdup(const char *src)
+{
+	char *ret;
+
+	if (!(ret = strdup(src)))
+		util_die("strdup: %s\n", strerror(errno));
+
+	return ret;
+}
+
+char *
+util_strndup(const char *src, size_t n)
+{
+	assert(src);
+
+	char *ret;
+
+	if (!(ret = strndup(src, n)))
+		util_die("strndup: %s\n", strerror(errno));
+
+	return ret;
+}
+
+char *
+util_basename(const char *str)
+{
+	static char ret[PATH_MAX];
+	char tmp[PATH_MAX];
+
+	util_strlcpy(tmp, str, sizeof (tmp));
+	util_strlcpy(ret, basename(tmp), sizeof (ret));
+
+	return ret;
+}
+
+char *
+util_dirname(const char *str)
+{
+	static char ret[PATH_MAX];
+	char tmp[PATH_MAX];
+
+	util_strlcpy(tmp, str, sizeof (tmp));
+	util_strlcpy(ret, dirname(tmp), sizeof (ret));
+
+	return ret;
+}
+
+FILE *
+util_fmemopen(void *buf, size_t size, const char *mode)
+{
+	FILE *fp;
+
+	if (!(fp = fmemopen(buf, size, mode)))
+		util_die("fmemopen: %s\n", strerror(errno));
+
+	return fp;
+}
+
+FILE *
+util_open_memstream(char **out, size_t *outsz)
+{
+	assert(out);
+	assert(outsz);
+
+	FILE *fp;
+
+	if (!(fp = open_memstream(out, outsz)))
+		util_die("open_memstream: %s\n", strerror(errno));
+
+	return fp;
+}
+
+char *
+util_read(const char *path)
+{
+	int fd;
+	struct stat st;
+	char *ret;
+
+	if ((fd = open(path, O_RDONLY)) < 0)
+		return NULL;
+	if (fstat(fd, &st) < 0)
+		return close(fd), NULL;
+
+	ret = util_calloc(1, st.st_size + 1);
+
+	if (read(fd, ret, st.st_size) != st.st_size) {
+		free(ret);
+		ret = NULL;
+	}
+
+	close(fd);
+
+	return ret;
+}
+
+void
+util_die(const char *fmt, ...)
+{
+	assert(fmt);
+
+	va_list ap;
+
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	exit(1);
+}
+
+json_t *
+util_json_pack(const char *fmt, ...)
+{
+	va_list ap;
+	json_t *doc;
+	json_error_t err;
+
+	va_start(ap, fmt);
+	doc = json_vpack_ex(&err, 0, fmt, ap);
+	va_end(ap);
+
+	if (!doc)
+		util_die("json_vpack_ex: %s\n", err.text);
+
+	return doc;
+}
+
+char *
+util_json_dump(const json_t *json)
+{
+	assert(json);
+
+	char *ret;
+
+	if (!(ret = json_dumps(json, JSON_COMPACT)))
+		util_die("json_dump: %s\n", strerror(ENOMEM));
+
+	return ret;
+}