[core] Create POSIX utils module

arduino/libretuya/core/LibreTuyaAPI.cpp

@@ -2,16 +2,21 @@
 
 #include "LibreTuyaAPI.h"
 
-__weak char *strdup(const char *s) {
-	size_t len = strlen(s) + 1;
-	void *newp = malloc(len);
-	if (newp == NULL)
-		return NULL;
-	return (char *)memcpy(newp, s, len);
-}
-
 String ipToString(const IPAddress &ip) {
 	char szRet[16];
 	sprintf(szRet, "%hhu.%hhu.%hhu.%hhu", ip[0], ip[1], ip[2], ip[3]);
 	return String(szRet);
 }
+
+static void lt_random_bytes(uint8_t *buf, size_t len) {
+	int *data = (int *)buf;
+	size_t i;
+	for (i = 0; len >= sizeof(int); len -= sizeof(int)) {
+		data[i++] = rand();
+	}
+	if (len) {
+		int rem				= rand();
+		unsigned char *pRem = (unsigned char *)&rem;
+		memcpy(buf + i * sizeof(int), pRem, len);
+	}
+}

arduino/libretuya/core/LibreTuyaAPI.h

@@ -24,6 +24,7 @@ extern "C" {
 #endif // __cplusplus
 
 #include "lt_logger.h"
+#include "lt_posix_api.h"
 
 #ifdef __cplusplus
 } // extern "C"
@@ -43,7 +44,7 @@ extern "C" {
 #define PGM_VOID_P			const void *
 
 // C functions
-extern char *strdup(const char *);
+void lt_rand_bytes(uint8_t *buf, size_t len);
 
 // C++ only functions
 #ifdef __cplusplus

arduino/libretuya/libraries/NetUtils/ssl/MbedTLSClient.cpp

@@ -80,16 +80,7 @@ int MbedTLSClient::connect(const char *host, uint16_t port, const char *pskIdent
 }
 
 static int ssl_random(void *data, unsigned char *output, size_t len) {
-	int *buf = (int *)output;
-	size_t i;
-	for (i = 0; len >= sizeof(int); len -= sizeof(int)) {
-		buf[i++] = rand();
-	}
-	if (len) {
-		int rem				= rand();
-		unsigned char *pRem = (unsigned char *)&rem;
-		memcpy(output + i * sizeof(int), pRem, len);
-	}
+	lt_rand_bytes((uint8_t *)output, len);
 	return 0;
 }
 

arduino/libretuya/posix/.clang-format

@@ -0,0 +1,2 @@
+DisableFormat: true
+SortIncludes: Never

arduino/libretuya/posix/lt_posix_api.h

@@ -0,0 +1,5 @@
+/* Copyright (c) Kuba Szczodrzyński 2022-05-16. */
+
+extern char *strdup(const char *);
+extern int strcasecmp(const char *s1, const char *s2);
+extern int strncasecmp(const char *s1, const char *s2, size_t n);

arduino/libretuya/posix/strcasecmp.c

@@ -0,0 +1,97 @@
+/*	$OpenBSD: strcasecmp.c,v 1.6 2005/08/08 08:05:37 espie Exp $	*/
+/*
+ * Copyright (c) 1987, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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 University 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 REGENTS 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 REGENTS 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 <string.h>
+typedef unsigned char u_char;
+/*
+ * This array is designed for mapping upper and lower case letter
+ * together for a case independent comparison.  The mappings are
+ * based upon ascii character sequences.
+ */
+static const u_char charmap[] = {
+	'\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
+	'\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
+	'\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
+	'\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
+	'\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
+	'\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
+	'\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
+	'\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
+	'\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+	'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+	'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+	'\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
+	'\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+	'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+	'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+	'\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
+	'\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
+	'\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
+	'\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
+	'\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
+	'\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
+	'\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
+	'\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
+	'\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
+	'\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
+	'\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
+	'\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
+	'\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
+	'\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
+	'\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
+	'\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
+	'\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
+};
+int
+strcasecmp(const char *s1, const char *s2)
+{
+	const u_char *cm = charmap;
+	const u_char *us1 = (const u_char *)s1;
+	const u_char *us2 = (const u_char *)s2;
+	while (cm[*us1] == cm[*us2++])
+		if (*us1++ == '\0')
+			return (0);
+	return (cm[*us1] - cm[*--us2]);
+}
+int
+strncasecmp(const char *s1, const char *s2, size_t n)
+{
+	if (n != 0) {
+		const u_char *cm = charmap;
+		const u_char *us1 = (const u_char *)s1;
+		const u_char *us2 = (const u_char *)s2;
+		do {
+			if (cm[*us1] != cm[*us2++])
+				return (cm[*us1] - cm[*--us2]);
+			if (*us1++ == '\0')
+				break;
+		} while (--n != 0);
+	}
+	return (0);
+}

arduino/libretuya/posix/strdup.c

@@ -0,0 +1,11 @@
+/* Copyright (c) Kuba Szczodrzyński 2022-05-16. */
+
+#include <stddef.h>
+
+__attribute__((weak)) char *strdup(const char *s) {
+	size_t len = strlen(s) + 1;
+	void *newp = malloc(len);
+	if (newp == NULL)
+		return NULL;
+	return (char *)memcpy(newp, s, len);
+}

builder/arduino-common.py

@@ -39,12 +39,14 @@ env.AddLibrary(
         "+<common/*.c*>",
         "+<core/*.c*>",
         "+<libraries/**/*.c*>",
+        "+<posix/*.c>",
     ],
     includes=[
         "!<.>",
         "!<compat>",
         "!<core>",
         "!<libraries/*>",
+        "!<posix>",
     ],
 )