RichString_setAttrn: refactor to take a length instead of a stop index

Fixes: #459

Meter.c

@@ -254,13 +254,13 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
    offset = 0;
    for (uint8_t i = 0; i < this->curItems; i++) {
       int attr = this->curAttributes ? this->curAttributes[i] : Meter_attributes(this)[i];
-      RichString_setAttrn(&bar, CRT_colors[attr], startPos + offset, startPos + offset + blockSizes[i] - 1);
+      RichString_setAttrn(&bar, CRT_colors[attr], startPos + offset, blockSizes[i]);
       RichString_printoffnVal(bar, y, x + offset, startPos + offset, MINIMUM(blockSizes[i], w - offset));
       offset += blockSizes[i];
       offset = CLAMP(offset, 0, w);
    }
    if (offset < w) {
-      RichString_setAttrn(&bar, CRT_colors[BAR_SHADOW], startPos + offset, startPos + w - 1);
+      RichString_setAttrn(&bar, CRT_colors[BAR_SHADOW], startPos + offset, w - offset);
       RichString_printoffnVal(bar, y, x + offset, startPos + offset, w - offset);
    }
 

Process.c

@@ -183,7 +183,8 @@ void Process_fillStarttimeBuffer(Process* this) {
 }
 
 static inline void Process_writeCommand(const Process* this, int attr, int baseattr, RichString* str) {
-   int start = RichString_size(str), finish = 0;
+   int start = RichString_size(str);
+   int len = 0;
    const char* comm = this->comm;
 
    if (this->settings->highlightBaseName || !this->settings->showProgramPath) {
@@ -192,25 +193,24 @@ static inline void Process_writeCommand(const Process* this, int attr, int basea
          if (comm[i] == '/') {
             basename = i + 1;
          } else if (comm[i] == ':') {
-            finish = i + 1;
+            len = i + 1;
             break;
          }
       }
-      if (!finish) {
+      if (len == 0) {
          if (this->settings->showProgramPath) {
             start += basename;
          } else {
             comm += basename;
          }
-         finish = this->basenameOffset - basename;
+         len = this->basenameOffset - basename;
       }
-      finish += start - 1;
    }
 
    RichString_appendWide(str, attr, comm);
 
    if (this->settings->highlightBaseName) {
-      RichString_setAttrn(str, baseattr, start, finish);
+      RichString_setAttrn(str, baseattr, start, len);
    }
 }
 

RichString.c

@@ -73,12 +73,10 @@ static inline int RichString_writeFromAscii(RichString* this, int attrs, const c
    return len;
 }
 
-inline void RichString_setAttrn(RichString* this, int attrs, int start, int finish) {
-   cchar_t* ch = this->chptr + start;
-   finish = CLAMP(finish, 0, this->chlen - 1);
-   for (int i = start; i <= finish; i++) {
-      ch->attr = attrs;
-      ch++;
+inline void RichString_setAttrn(RichString* this, int attrs, int start, int charcount) {
+   int end = CLAMP(start + charcount, 0, this->chlen);
+   for (int i = start; i < end; i++) {
+      this->chptr[i].attr = attrs;
    }
 }
 
@@ -110,12 +108,10 @@ static inline int RichString_writeFromAscii(RichString* this, int attrs, const c
    return RichString_writeFromWide(this, attrs, data_c, from, len);
 }
 
-void RichString_setAttrn(RichString* this, int attrs, int start, int finish) {
-   chtype* ch = this->chptr + start;
-   finish = CLAMP(finish, 0, this->chlen - 1);
-   for (int i = start; i <= finish; i++) {
-      *ch = (*ch & 0xff) | attrs;
-      ch++;
+void RichString_setAttrn(RichString* this, int attrs, int start, int charcount) {
+   int end = CLAMP(start + charcount, 0, this->chlen);
+   for (int i = start; i < end; i++) {
+      this->chptr[i] = (this->chptr[i] & 0xff) | attrs;
    }
 }
 
@@ -148,7 +144,7 @@ void RichString_appendChr(RichString* this, char c, int count) {
 }
 
 void RichString_setAttr(RichString* this, int attrs) {
-   RichString_setAttrn(this, attrs, 0, this->chlen - 1);
+   RichString_setAttrn(this, attrs, 0, this->chlen);
 }
 
 int RichString_appendWide(RichString* this, int attrs, const char* data) {

RichString.h

@@ -42,7 +42,7 @@ typedef struct RichString_ {
    int highlightAttr;
 } RichString;
 
-void RichString_setAttrn(RichString* this, int attrs, int start, int finish);
+void RichString_setAttrn(RichString* this, int attrs, int start, int charcount);
 
 int RichString_findChar(RichString* this, char c, int start);
 

linux/LinuxProcess.c

@@ -528,30 +528,30 @@ static void LinuxProcess_writeCommand(const Process* this, int attr, int baseAtt
       if (!lp->mergedCommand.separateComm && commStart == baseStart && highlightBaseName) {
          /* If it was matched with procExe's basename, make it bold if needed */
          if (commEnd > baseEnd) {
-            RichString_setAttrn(str, A_BOLD | baseAttr, baseStart, baseEnd - 1);
-            RichString_setAttrn(str, A_BOLD | commAttr, baseEnd, commEnd - 1);
+            RichString_setAttrn(str, A_BOLD | baseAttr, baseStart, baseEnd - baseStart);
+            RichString_setAttrn(str, A_BOLD | commAttr, baseEnd, commEnd - baseEnd);
          } else if (commEnd < baseEnd) {
-            RichString_setAttrn(str, A_BOLD | commAttr, commStart, commEnd - 1);
-            RichString_setAttrn(str, A_BOLD | baseAttr, commEnd, baseEnd - 1);
+            RichString_setAttrn(str, A_BOLD | commAttr, commStart, commEnd - commStart);
+            RichString_setAttrn(str, A_BOLD | baseAttr, commEnd, baseEnd - commEnd);
          } else {
             // Actually should be highlighted commAttr, but marked baseAttr to reduce visual noise
-            RichString_setAttrn(str, A_BOLD | baseAttr, commStart, commEnd - 1);
+            RichString_setAttrn(str, A_BOLD | baseAttr, commStart, commEnd - commStart);
          }
 
          baseStart = baseEnd;
       } else {
-         RichString_setAttrn(str, commAttr, commStart, commEnd - 1);
+         RichString_setAttrn(str, commAttr, commStart, commEnd - commStart);
       }
    }
 
    if (baseStart < baseEnd && highlightBaseName) {
-      RichString_setAttrn(str, baseAttr, baseStart, baseEnd - 1);
+      RichString_setAttrn(str, baseAttr, baseStart, baseEnd - baseStart);
    }
 
    if (mc->sep1)
-      RichString_setAttrn(str, CRT_colors[FAILED_READ], strStart + mc->sep1, strStart + mc->sep1);
+      RichString_setAttrn(str, CRT_colors[FAILED_READ], strStart + mc->sep1, 1);
    if (mc->sep2)
-      RichString_setAttrn(str, CRT_colors[FAILED_READ], strStart + mc->sep2, strStart + mc->sep2);
+      RichString_setAttrn(str, CRT_colors[FAILED_READ], strStart + mc->sep2, 1);
 }
 
 static void LinuxProcess_writeCommandField(const Process *this, RichString *str, char *buffer, int n, int attr) {