diff --git a/Meter.c b/Meter.c
index c37a474f..1159f5e5 100644
--- a/Meter.c
+++ b/Meter.c
@@ -114,6 +114,9 @@ typedef struct GraphData_ {
 #ifndef MAX
 #define MAX(a,b) ((a)>(b)?(a):(b))
 #endif
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
 
 MeterClass Meter_class = {
    .super = {
@@ -297,8 +300,7 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
    int items = Meter_getItems(this);
    for (int i = 0; i < items; i++) {
       double value = this->values[i];
-      value = MAX(value, 0);
-      value = MIN(value, this->total);
+      value = CLAMP(value, 0.0, this->total);
       if (value > 0) {
          blockSizes[i] = ceil((value/this->total) * w);
       } else {
@@ -306,7 +308,7 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
       }
       int nextOffset = offset + blockSizes[i];
       // (Control against invalid values)
-      nextOffset = MIN(MAX(nextOffset, 0), w);
+      nextOffset = CLAMP(nextOffset, 0, w);
       for (int j = offset; j < nextOffset; j++)
          if (bar[j] == ' ') {
             if (CRT_colorScheme == COLORSCHEME_MONOCHROME) {
@@ -324,8 +326,7 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
       attrset(CRT_colors[Meter_attributes(this)[i]]);
       mvaddnstr(y, x + offset, bar + offset, blockSizes[i]);
       offset += blockSizes[i];
-      offset = MAX(offset, 0);
-      offset = MIN(offset, w);
+      offset = CLAMP(offset, 0, w);
    }
    if (offset < w) {
       attrset(CRT_colors[BAR_SHADOW]);
@@ -406,13 +407,13 @@ static void GraphMeterMode_draw(Meter* this, int x, int y, int w) {
    
    for (int i = nValues - (w*2) + 2, k = 0; i < nValues; i+=2, k++) {
       const double dot = (1.0 / (GraphMeterMode_pixPerRow * 4));
-      int v1 = MIN(GraphMeterMode_pixPerRow * 4, MAX(1, data->values[i] / dot));
-      int v2 = MIN(GraphMeterMode_pixPerRow * 4, MAX(1, data->values[i+1] / dot));
+      int v1 = CLAMP(data->values[i] / dot, 1, GraphMeterMode_pixPerRow * 4);
+      int v2 = CLAMP(data->values[i+1] / dot, 1, GraphMeterMode_pixPerRow * 4);
 
       int colorIdx = GRAPH_1;
       for (int line = 0; line < 4; line++) {
-         int line1 = MIN(GraphMeterMode_pixPerRow, MAX(0, v1 - (GraphMeterMode_pixPerRow * (3 - line))));
-         int line2 = MIN(GraphMeterMode_pixPerRow, MAX(0, v2 - (GraphMeterMode_pixPerRow * (3 - line))));
+         int line1 = CLAMP(v1 - (GraphMeterMode_pixPerRow * (3 - line)), 0, GraphMeterMode_pixPerRow);
+         int line2 = CLAMP(v2 - (GraphMeterMode_pixPerRow * (3 - line)), 0, GraphMeterMode_pixPerRow);
 
          attrset(CRT_colors[colorIdx]);
          mvaddstr(y+line, x+k, GraphMeterMode_dots[line1 * (GraphMeterMode_pixPerRow + 1) + line2]);
diff --git a/Meter.h b/Meter.h
index fe102fb3..18a6b1e0 100644
--- a/Meter.h
+++ b/Meter.h
@@ -100,6 +100,9 @@ typedef struct GraphData_ {
 #ifndef MAX
 #define MAX(a,b) ((a)>(b)?(a):(b))
 #endif
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
 
 extern MeterClass Meter_class;
 
diff --git a/RichString.c b/RichString.c
index c9c02dec..75198330 100644
--- a/RichString.c
+++ b/RichString.c
@@ -62,10 +62,6 @@ typedef struct RichString_ {
 
 }*/
 
-#ifndef MIN
-#define MIN(a,b) ((a)<(b)?(a):(b))
-#endif
-
 #define charBytes(n) (sizeof(CharType) * (n)) 
 
 static void RichString_extendLen(RichString* this, int len) {
diff --git a/RichString.h b/RichString.h
index 04e468d9..796965ac 100644
--- a/RichString.h
+++ b/RichString.h
@@ -59,10 +59,6 @@ typedef struct RichString_ {
 } RichString;
 
 
-#ifndef MIN
-#define MIN(a,b) ((a)<(b)?(a):(b))
-#endif
-
 #define charBytes(n) (sizeof(CharType) * (n)) 
 
 #define RichString_setLen(this, len) do{ if(len < RICHSTRING_MAXLEN && this->chlen < RICHSTRING_MAXLEN) { RichString_setChar(this,len,0); this->chlen=len; } else RichString_extendLen(this,len); }while(0)
diff --git a/darwin/Platform.c b/darwin/Platform.c
index 80899064..22a18774 100644
--- a/darwin/Platform.c
+++ b/darwin/Platform.c
@@ -27,6 +27,10 @@ in the source distribution for its full text.
 #include "DarwinProcess.h"
 }*/
 
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
+
 ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 SignalItem Platform_signals[] = {
@@ -213,7 +217,7 @@ double Platform_setCPUValues(Meter* mtr, int cpu) {
    /* Convert to percent and return */
    total = mtr->values[CPU_METER_NICE] + mtr->values[CPU_METER_NORMAL] + mtr->values[CPU_METER_KERNEL];
 
-   return MIN(100.0, MAX(0.0, total));
+   return CLAMP(total, 0.0, 100.0);
 }
 
 void Platform_setMemoryValues(Meter* mtr) {
diff --git a/darwin/Platform.h b/darwin/Platform.h
index 0a873bf5..29ef289d 100644
--- a/darwin/Platform.h
+++ b/darwin/Platform.h
@@ -16,6 +16,10 @@ in the source distribution for its full text.
 #include "BatteryMeter.h"
 #include "DarwinProcess.h"
 
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
+
 extern ProcessField Platform_defaultFields[];
 
 extern SignalItem Platform_signals[];
diff --git a/freebsd/Platform.c b/freebsd/Platform.c
index a5e0e0b3..9e0c25b0 100644
--- a/freebsd/Platform.c
+++ b/freebsd/Platform.c
@@ -34,6 +34,10 @@ extern ProcessFieldData Process_fields[];
 
 }*/
 
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
+
 ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 int Platform_numberOfFields = LAST_PROCESSFIELD;
@@ -171,7 +175,7 @@ double Platform_setCPUValues(Meter* this, int cpu) {
       percent = v[0]+v[1]+v[2];
    }
 
-   percent = MIN(100.0, MAX(0.0, percent));
+   percent = CLAMP(percent, 0.0, 100.0);
    if (isnan(percent)) percent = 0.0;
    return percent;
 }
diff --git a/freebsd/Platform.h b/freebsd/Platform.h
index ef46442a..ecc0dcd4 100644
--- a/freebsd/Platform.h
+++ b/freebsd/Platform.h
@@ -16,6 +16,10 @@ in the source distribution for its full text.
 extern ProcessFieldData Process_fields[];
 
 
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
+
 extern ProcessField Platform_defaultFields[];
 
 extern int Platform_numberOfFields;
@@ -42,4 +46,6 @@ void Platform_setSwapValues(Meter* this);
 
 void Platform_setTasksValues(Meter* this);
 
+char* Platform_getProcessEnv(pid_t pid);
+
 #endif
diff --git a/linux/LinuxProcessList.c b/linux/LinuxProcessList.c
index 9387dbd4..19820ada 100644
--- a/linux/LinuxProcessList.c
+++ b/linux/LinuxProcessList.c
@@ -83,6 +83,10 @@ typedef struct LinuxProcessList_ {
 #endif
 
 }*/
+
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
    
 ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidWhiteList, uid_t userId) {
    LinuxProcessList* this = calloc(1, sizeof(LinuxProcessList));
@@ -540,7 +544,7 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, const char*
       if (settings->flags & PROCESS_FLAG_LINUX_IOPRIO)
          LinuxProcess_updateIOPriority(lp);
       float percent_cpu = (lp->utime + lp->stime - lasttimes) / period * 100.0;
-      proc->percent_cpu = MAX(MIN(percent_cpu, cpus*100.0), 0.0);
+      proc->percent_cpu = CLAMP(percent_cpu, 0.0, cpus * 100.0);
       if (isnan(proc->percent_cpu)) proc->percent_cpu = 0.0;
       proc->percent_mem = (proc->m_resident * PAGE_SIZE_KB) / (double)(pl->totalMem) * 100.0;
 
diff --git a/linux/LinuxProcessList.h b/linux/LinuxProcessList.h
index 2a4abff9..97725812 100644
--- a/linux/LinuxProcessList.h
+++ b/linux/LinuxProcessList.h
@@ -63,6 +63,10 @@ typedef struct LinuxProcessList_ {
 #define PROC_LINE_LENGTH 512
 #endif
 
+
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
    
 ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidWhiteList, uid_t userId);
 
diff --git a/linux/Platform.c b/linux/Platform.c
index 81c96e4c..7b8a120b 100644
--- a/linux/Platform.c
+++ b/linux/Platform.c
@@ -37,6 +37,10 @@ in the source distribution for its full text.
 #include "SignalsPanel.h"
 }*/
 
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
+
 ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, M_SHARE, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
 
 //static ProcessField defaultIoFields[] = { PID, IO_PRIORITY, USER, IO_READ_RATE, IO_WRITE_RATE, IO_RATE, COMM, 0 };
@@ -186,7 +190,7 @@ double Platform_setCPUValues(Meter* this, int cpu) {
       Meter_setItems(this, 4);
       percent = v[0]+v[1]+v[2]+v[3];
    }
-   percent = MIN(100.0, MAX(0.0, percent));
+   percent = CLAMP(percent, 0.0, 100.0);
    if (isnan(percent)) percent = 0.0;
    return percent;
 }
diff --git a/linux/Platform.h b/linux/Platform.h
index 114b9a20..b0d69fb7 100644
--- a/linux/Platform.h
+++ b/linux/Platform.h
@@ -15,6 +15,10 @@ in the source distribution for its full text.
 #include "LinuxProcess.h"
 #include "SignalsPanel.h"
 
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
+
 extern ProcessField Platform_defaultFields[];
 
 extern int Platform_numberOfFields;
diff --git a/openbsd/OpenBSDProcessList.c b/openbsd/OpenBSDProcessList.c
index 6da38efc..c902d2bd 100644
--- a/openbsd/OpenBSDProcessList.c
+++ b/openbsd/OpenBSDProcessList.c
@@ -42,6 +42,10 @@ typedef struct OpenBSDProcessList_ {
 
 }*/
 
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
+
 static int pageSizeKb;
 static long fscale;
 
@@ -229,7 +233,7 @@ void ProcessList_goThroughEntries(ProcessList* this) {
       proc->m_size = kproc->p_vm_dsize;
       proc->m_resident = kproc->p_vm_rssize;
       proc->percent_mem = (proc->m_resident * PAGE_SIZE_KB) / (double)(this->totalMem) * 100.0;
-      proc->percent_cpu = MAX(MIN(getpcpu(kproc), this->cpuCount*100.0), 0.0);
+      proc->percent_cpu = CLAMP(getpcpu(kproc), 0.0, this->cpuCount*100.0);
       //proc->nlwp = kproc->p_numthreads;
       //proc->time = kproc->p_rtime_sec + ((kproc->p_rtime_usec + 500000) / 10);
       proc->nice = kproc->p_nice - 20;
diff --git a/openbsd/OpenBSDProcessList.h b/openbsd/OpenBSDProcessList.h
index 567dd25e..192fb34f 100644
--- a/openbsd/OpenBSDProcessList.h
+++ b/openbsd/OpenBSDProcessList.h
@@ -27,6 +27,10 @@ typedef struct OpenBSDProcessList_ {
 } OpenBSDProcessList;
 
 
+#ifndef CLAMP
+#define CLAMP(x,low,high) (((x)>(high))?(high):(((x)<(low))?(low):(x)))
+#endif
+
 
 ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidWhiteList, uid_t userId);