String: compatibility with 64 bits scalars

cores/esp8266/WString.cpp

@@ -98,6 +98,32 @@ String::String(unsigned long value, unsigned char base) {
     *this = buf;
 }
 
+String::String(long long value) {
+    init();
+    char buf[2 + 8 * sizeof(long long)];
+    sprintf(buf, "%lld", value);
+    *this = buf;
+}
+
+String::String(unsigned long long value) {
+    init();
+    char buf[1 + 8 * sizeof(unsigned long long)];
+    sprintf(buf, "%llu", value);
+    *this = buf;
+}
+
+String::String(long long value, unsigned char base) {
+    init();
+    char buf[2 + 8 * sizeof(long long)];
+    *this = lltoa(value, buf, sizeof(buf), base);
+}
+
+String::String(unsigned long long value, unsigned char base) {
+    init();
+    char buf[1 + 8 * sizeof(unsigned long long)];
+    *this = ulltoa(value, buf, sizeof(buf), base);
+}
+
 String::String(float value, unsigned char decimalPlaces) {
     init();
     char buf[33];
@@ -313,6 +339,16 @@ unsigned char String::concat(unsigned long num) {
     return concat(buf, strlen(buf));
 }
 
+unsigned char String::concat(long long num) {
+    char buf[2 + 3 * sizeof(long long)];
+    return concat(buf, sprintf(buf, "%lld", num));
+}
+
+unsigned char String::concat(unsigned long long num) {
+    char buf[1 + 3 * sizeof(unsigned long long)];
+    return concat(buf, sprintf(buf, "%llu", num));
+}
+
 unsigned char String::concat(float num) {
     char buf[20];
     char *string = dtostrf(num, 4, 2, buf);

cores/esp8266/WString.h

@@ -72,6 +72,10 @@ class String {
         explicit String(unsigned int, unsigned char base = 10);
         explicit String(long, unsigned char base = 10);
         explicit String(unsigned long, unsigned char base = 10);
+        explicit String(long long /* base 10 */);
+        explicit String(long long, unsigned char base);
+        explicit String(unsigned long long /* base 10 */);
+        explicit String(unsigned long long, unsigned char base);
         explicit String(float, unsigned char decimalPlaces = 2);
         explicit String(double, unsigned char decimalPlaces = 2);
         ~String() {
@@ -117,6 +121,8 @@ class String {
         unsigned char concat(unsigned int num);
         unsigned char concat(long num);
         unsigned char concat(unsigned long num);
+        unsigned char concat(long long num);
+        unsigned char concat(unsigned long long num);
         unsigned char concat(float num);
         unsigned char concat(double num);
         unsigned char concat(const __FlashStringHelper *str);
@@ -156,6 +162,14 @@ class String {
             concat(num);
             return *this;
         }
+        String &operator +=(long long num) {
+            concat(num);
+            return *this;
+        }
+        String &operator +=(unsigned long long num) {
+            concat(num);
+            return *this;
+        }
         String &operator +=(float num) {
             concat(num);
             return *this;
@@ -177,6 +191,8 @@ class String {
         friend StringSumHelper &operator +(const StringSumHelper &lhs, unsigned int num);
         friend StringSumHelper &operator +(const StringSumHelper &lhs, long num);
         friend StringSumHelper &operator +(const StringSumHelper &lhs, unsigned long num);
+        friend StringSumHelper &operator +(const StringSumHelper &lhs, long long num);
+        friend StringSumHelper &operator +(const StringSumHelper &lhs, unsigned long long num);
         friend StringSumHelper &operator +(const StringSumHelper &lhs, float num);
         friend StringSumHelper &operator +(const StringSumHelper &lhs, double num);
         friend StringSumHelper &operator +(const StringSumHelper &lhs, const __FlashStringHelper *rhs);
@@ -375,6 +391,12 @@ class StringSumHelper: public String {
         StringSumHelper(unsigned long num) :
                 String(num) {
         }
+        StringSumHelper(long long num) :
+                String(num) {
+        }
+        StringSumHelper(unsigned long long num) :
+                String(num) {
+        }
         StringSumHelper(float num) :
                 String(num) {
         }

cores/esp8266/debug.cpp

@@ -30,7 +30,7 @@ void hexdump(const void *mem, uint32_t len, uint8_t cols)
     while (len > 0)
     {
         uint32_t linesize = cols > len ? len : cols;
-        os_printf("\n[%p] 0x%04x: ", src, src - (const char*)mem);
+        os_printf("\n[%p] 0x%04x: ", src, (int)(src - (const char*)mem));
         for (uint32_t i = 0; i < linesize; i++)
         {
             os_printf("%02x ", *(src + i));

cores/esp8266/stdlib_noniso.cpp

@@ -0,0 +1,62 @@
+/*
+  stdlib_noniso.h - nonstandard (but usefull) conversion functions
+
+  Copyright (c) 2021 David Gauchard. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include "stdlib_noniso.h"
+
+// ulltoa() is slower than std::to_char() (1.6 times)
+// but is smaller by ~800B/flash and ~250B/rodata
+
+// ulltoa fills str backwards and can return a pointer different from str
+char* ulltoa(unsigned long long val, char* str, int slen, unsigned int radix)
+{
+    str += --slen;
+    *str = 0;
+    do
+    {
+        auto mod = val % radix;
+        val /= radix;
+        *--str = mod + ((mod > 9) ? ('a' - 10) : '0');
+    } while (--slen && val);
+    return val? nullptr: str;
+}
+
+// lltoa fills str backwards and can return a pointer different from str
+char* lltoa (long long val, char* str, int slen, unsigned int radix)
+{
+    bool neg;
+    if (val < 0)
+    {
+        val = -val;
+        neg = true;
+    }
+    else
+    {
+        neg = false;
+    }
+    char* ret = ulltoa(val, str, slen, radix);
+    if (neg)
+    {
+        if (ret == str || ret == nullptr)
+            return nullptr;
+        *--ret = '-';
+    }
+    return ret;
+}

cores/esp8266/stdlib_noniso.h

@@ -1,9 +1,9 @@
-/* 
+/*
   stdlib_noniso.h - nonstandard (but usefull) conversion functions
 
   Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
   This file is part of the esp8266 core for Arduino environment.
- 
+
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
@@ -36,10 +36,14 @@ char* itoa (int val, char *s, int radix);
 
 char* ltoa (long val, char *s, int radix);
 
+char* lltoa (long long val, char* str, int slen, unsigned int radix);
+
 char* utoa (unsigned int val, char *s, int radix);
 
 char* ultoa (unsigned long val, char *s, int radix);
-
+
+char* ulltoa (unsigned long long val, char* str, int slen, unsigned int radix);
+
 char* dtostrf (double val, signed char width, unsigned char prec, char *s);
 
 void reverse(char* begin, char* end);

tests/host/Makefile

@@ -80,6 +80,7 @@ CORE_CPP_FILES := \
 		Stream.cpp \
 		WString.cpp \
 		Print.cpp \
+		stdlib_noniso.cpp \
 		FS.cpp \
 		spiffs_api.cpp \
 		MD5Builder.cpp \

tests/host/core/test_string.cpp

@@ -132,6 +132,16 @@ TEST_CASE("String concantenation", "[core][String]")
     REQUIRE(str == "abcdeabcde9872147483647-2147483648691969-123321-1.01");
     str += (double)1.01;
     REQUIRE(str == "abcdeabcde9872147483647-2147483648691969-123321-1.011.01");
+    str += LLONG_MIN;
+    REQUIRE(str == "abcdeabcde9872147483647-2147483648691969-123321-1.011.01-9223372036854775808");
+    str += String(LLONG_MIN, 10);
+    REQUIRE(str == "abcdeabcde9872147483647-2147483648691969-123321-1.011.01-9223372036854775808-9223372036854775808");
+    str += LLONG_MAX;
+    REQUIRE(str == "abcdeabcde9872147483647-2147483648691969-123321-1.011.01-9223372036854775808-92233720368547758089223372036854775807");
+    str += ULLONG_MAX;
+    REQUIRE(str == "abcdeabcde9872147483647-2147483648691969-123321-1.011.01-9223372036854775808-9223372036854775808922337203685477580718446744073709551615");
+    str += String(ULLONG_MAX, 16);
+    REQUIRE(str == "abcdeabcde9872147483647-2147483648691969-123321-1.011.01-9223372036854775808-9223372036854775808922337203685477580718446744073709551615ffffffffffffffff");
     str = "clean";
     REQUIRE(str.concat(str) == true);
     REQUIRE(str == "cleanclean");