1 files changed, 118 insertions, 0 deletions
diff --git a/MemoryMeter.c b/MemoryMeter.c
new file mode 100644
index 0000000..573b898
--- /dev/null
+++ b/MemoryMeter.c
@@ -0,0 +1,118 @@
+/*
+htop - MemoryMeter.c
+(C) 2004-2011 Hisham H. Muhammad
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
+#include "MemoryMeter.h"
+
+#include <assert.h>
+#include <math.h>
+#include <stddef.h>
+
+#include "CRT.h"
+#include "Macros.h"
+#include "Object.h"
+#include "Platform.h"
+#include "RichString.h"
+
+
+static const int MemoryMeter_attributes[] = {
+   MEMORY_USED,
+   MEMORY_SHARED,
+   MEMORY_COMPRESSED,
+   MEMORY_BUFFERS,
+   MEMORY_CACHE
+};
+
+static void MemoryMeter_updateValues(Meter* this) {
+   char* buffer = this->txtBuffer;
+   size_t size = sizeof(this->txtBuffer);
+   int written;
+
+   /* shared, compressed and available memory are not supported on all platforms */
+   this->values[MEMORY_METER_SHARED] = NAN;
+   this->values[MEMORY_METER_COMPRESSED] = NAN;
+   this->values[MEMORY_METER_AVAILABLE] = NAN;
+   Platform_setMemoryValues(this);
+
+   /* Do not print available memory in bar mode */
+   static_assert(MEMORY_METER_AVAILABLE + 1 == MEMORY_METER_ITEMCOUNT,
+      "MEMORY_METER_AVAILABLE is not the last item in MemoryMeterValues");
+   this->curItems = MEMORY_METER_AVAILABLE;
+
+   /* we actually want to show "used + shared + compressed" */
+   double used = this->values[MEMORY_METER_USED];
+   if (isPositive(this->values[MEMORY_METER_SHARED]))
+      used += this->values[MEMORY_METER_SHARED];
+   if (isPositive(this->values[MEMORY_METER_COMPRESSED]))
+      used += this->values[MEMORY_METER_COMPRESSED];
+
+   written = Meter_humanUnit(buffer, used, size);
+   METER_BUFFER_CHECK(buffer, size, written);
+
+   METER_BUFFER_APPEND_CHR(buffer, size, '/');
+
+   Meter_humanUnit(buffer, this->total, size);
+}
+
+static void MemoryMeter_display(const Object* cast, RichString* out) {
+   char buffer[50];
+   const Meter* this = (const Meter*)cast;
+
+   RichString_writeAscii(out, CRT_colors[METER_TEXT], ":");
+   Meter_humanUnit(buffer, this->total, sizeof(buffer));
+   RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
+
+   Meter_humanUnit(buffer, this->values[MEMORY_METER_USED], sizeof(buffer));
+   RichString_appendAscii(out, CRT_colors[METER_TEXT], " used:");
+   RichString_appendAscii(out, CRT_colors[MEMORY_USED], buffer);
+
+   /* shared memory is not supported on all platforms */
+   if (isNonnegative(this->values[MEMORY_METER_SHARED])) {
+      Meter_humanUnit(buffer, this->values[MEMORY_METER_SHARED], sizeof(buffer));
+      RichString_appendAscii(out, CRT_colors[METER_TEXT], " shared:");
+      RichString_appendAscii(out, CRT_colors[MEMORY_SHARED], buffer);
+   }
+
+   /* compressed memory is not supported on all platforms */
+   if (isNonnegative(this->values[MEMORY_METER_COMPRESSED])) {
+      Meter_humanUnit(buffer, this->values[MEMORY_METER_COMPRESSED], sizeof(buffer));
+      RichString_appendAscii(out, CRT_colors[METER_TEXT], " compressed:");
+      RichString_appendAscii(out, CRT_colors[MEMORY_COMPRESSED], buffer);
+   }
+
+   Meter_humanUnit(buffer, this->values[MEMORY_METER_BUFFERS], sizeof(buffer));
+   RichString_appendAscii(out, CRT_colors[METER_TEXT], " buffers:");
+   RichString_appendAscii(out, CRT_colors[MEMORY_BUFFERS_TEXT], buffer);
+
+   Meter_humanUnit(buffer, this->values[MEMORY_METER_CACHE], sizeof(buffer));
+   RichString_appendAscii(out, CRT_colors[METER_TEXT], " cache:");
+   RichString_appendAscii(out, CRT_colors[MEMORY_CACHE], buffer);
+
+   /* available memory is not supported on all platforms */
+   if (isNonnegative(this->values[MEMORY_METER_AVAILABLE])) {
+      Meter_humanUnit(buffer, this->values[MEMORY_METER_AVAILABLE], sizeof(buffer));
+      RichString_appendAscii(out, CRT_colors[METER_TEXT], " available:");
+      RichString_appendAscii(out, CRT_colors[METER_VALUE], buffer);
+   }
+}
+
+const MeterClass MemoryMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete,
+      .display = MemoryMeter_display,
+   },
+   .updateValues = MemoryMeter_updateValues,
+   .defaultMode = BAR_METERMODE,
+   .maxItems = MEMORY_METER_ITEMCOUNT,
+   .total = 100.0,
+   .attributes = MemoryMeter_attributes,
+   .name = "Memory",
+   .uiName = "Memory",
+   .caption = "Mem"
+};