Introduce ARRAYSIZE

Macros.h

@@ -13,6 +13,10 @@
 #define CLAMP(x, low, high)	(((x) > (high)) ? (high) : MAXIMUM(x, low))
 #endif
 
+#ifndef ARRAYSIZE
+#define ARRAYSIZE(x)          (sizeof(x) / sizeof((x)[0]))
+#endif
+
 #ifdef  __GNUC__  // defined by GCC and Clang
 
 #define ATTR_FORMAT(type, index, check) __attribute__((format (type, index, check)))

Settings.c

@@ -20,7 +20,7 @@ in the source distribution for its full text.
 void Settings_delete(Settings* this) {
    free(this->filename);
    free(this->fields);
-   for (unsigned int i = 0; i < (sizeof(this->columns)/sizeof(MeterColumnSettings)); i++) {
+   for (unsigned int i = 0; i < ARRAYSIZE(this->columns); i++) {
       String_freeArray(this->columns[i].names);
       free(this->columns[i].modes);
    }

linux/LinuxCRT.c

@@ -22,7 +22,7 @@ void CRT_handleSIGSEGV(int sgn) {
    #ifdef __linux
    fprintf(stderr, "\n\nhtop " VERSION " aborting. Please report bug at https://htop.dev\n");
    #ifdef HAVE_EXECINFO_H
-   size_t size = backtrace(backtraceArray, sizeof(backtraceArray) / sizeof(void *));
+   size_t size = backtrace(backtraceArray, ARRAYSIZE(backtraceArray));
    fprintf(stderr, "\n Please include in your report the following backtrace: \n");
    backtrace_symbols_fd(backtraceArray, size, 2);
    fprintf(stderr, "\nAdditionally, in order to make the above backtrace useful,");

linux/Platform.c

@@ -79,7 +79,7 @@ const SignalItem Platform_signals[] = {
    { .name = "31 SIGSYS",    .number = 31 },
 };
 
-const unsigned int Platform_numberOfSignals = sizeof(Platform_signals)/sizeof(SignalItem);
+const unsigned int Platform_numberOfSignals = ARRAYSIZE(Platform_signals);
 
 static Htop_Reaction Platform_actionSetIOPriority(State* st) {
    Panel* panel = st->panel;