Linux: use correct column alignment for wide fields

This affects:
- PROC_COMM, PROC_EXE and CWD on Linux
- JAIL on FreeBSD and DragonFlyBSD
- ZONE on Solaris

Process.c

@@ -244,6 +244,11 @@ void Process_outputRate(RichString* str, char* buffer, size_t n, double rate, in
    }
 }
 
+void Process_printLeftAlignedField(RichString* str, int attr, const char* content, unsigned int width) {
+   int c = RichString_appendnWide(str, attr, content, MINIMUM(width, strlen(content)));
+   RichString_appendChr(str, ' ', width + 1 - c);
+}
+
 void Process_writeField(const Process* this, RichString* str, ProcessField field) {
    char buffer[256]; buffer[255] = '\0';
    int attr = CRT_colors[DEFAULT_COLOR];
@@ -365,8 +370,7 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
          attr = CRT_colors[PROCESS_SHADOW];
 
       if (this->user) {
-         int c = RichString_appendnWide(str, attr, this->user, MINIMUM(9, strlen(this->user)));
-         RichString_appendChr(str, ' ', 10 - c);
+         Process_printLeftAlignedField(str, attr, this->user, 9);
          return;
       }
 

Process.h

@@ -179,6 +179,8 @@ void Process_fillStarttimeBuffer(Process* this);
 
 void Process_outputRate(RichString* str, char* buffer, size_t n, double rate, int coloring);
 
+void Process_printLeftAlignedField(RichString* str, int attr, const char* content, unsigned int width);
+
 void Process_display(const Object* cast, RichString* out);
 
 void Process_done(Process* this);

RichString.c

@@ -60,7 +60,7 @@ static inline int RichString_writeFromWide(RichString* this, int attrs, const ch
       this->chptr[i] = (CharType) { .attr = attrs & 0xffffff, .chars = { (iswprint(data[j]) ? data[j] : '?') } };
    }
 
-   return len;
+   return wcswidth(data, len);
 }
 
 static inline int RichString_writeFromAscii(RichString* this, int attrs, const char* data, int from, int len) {

dragonflybsd/DragonFlyBSDProcess.c

@@ -71,14 +71,7 @@ static void DragonFlyBSDProcess_writeField(const Process* this, RichString* str,
    // add Platform-specific fields here
    case PID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, (fp->kernel ? -1 : this->pid)); break;
    case JID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, fp->jid); break;
-   case JAIL: {
-      xSnprintf(buffer, n, "%-11s ", fp->jname);
-      if (buffer[11] != '\0') {
-         buffer[11] = ' ';
-         buffer[12] = '\0';
-      }
-      break;
-   }
+   case JAIL: Process_printLeftAlignedField(str, attr, fp->jname, 11); return;
    default:
       Process_writeField(this, str, field);
       return;

freebsd/FreeBSDProcess.c

@@ -71,14 +71,9 @@ static void FreeBSDProcess_writeField(const Process* this, RichString* str, Proc
    switch (field) {
    // add FreeBSD-specific fields here
    case JID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, fp->jid); break;
-   case JAIL: {
-      xSnprintf(buffer, n, "%-11s ", fp->jname);
-      if (buffer[11] != '\0') {
-         buffer[11] = ' ';
-         buffer[12] = '\0';
-      }
-      break;
-   }
+   case JAIL:
+      Process_printLeftAlignedField(str, attr, fp->jname ? fp->jname : "N/A", 11);
+      return;
    case TTY_NR:
       if (fp->ttyPath) {
          if (fp->ttyPath == nodevStr)

freebsd/FreeBSDProcessList.c

@@ -414,7 +414,7 @@ static char* FreeBSDProcessList_readJailName(const struct kinfo_proc* kproc) {
    char*  jname = NULL;
    char   jnamebuf[MAXHOSTNAMELEN];
 
-   if (kproc->ki_jid != 0 ) {
+   if (kproc->ki_jid != 0) {
       struct iovec jiov[6];
 
       memset(jnamebuf, 0, sizeof(jnamebuf));

linux/LinuxProcess.c

@@ -707,39 +707,46 @@ static void LinuxProcess_writeField(const Process* this, RichString* str, Proces
       return;
    }
    case PROC_COMM: {
+      const char* procComm;
       if (lp->procComm) {
          attr = CRT_colors[Process_isUserlandThread(this) ? PROCESS_THREAD_COMM : PROCESS_COMM];
-         /* 15 being (TASK_COMM_LEN - 1) */
-         xSnprintf(buffer, n, "%-15.15s ", lp->procComm);
+         procComm = lp->procComm;
       } else {
          attr = CRT_colors[PROCESS_SHADOW];
-         xSnprintf(buffer, n, "%-15.15s ", Process_isKernelThread(lp) ? kthreadID : "N/A");
+         procComm = Process_isKernelThread(lp) ? kthreadID : "N/A";
       }
-      break;
+      /* 15 being (TASK_COMM_LEN - 1) */
+      Process_printLeftAlignedField(str, attr, procComm, 15);
+      return;
    }
    case PROC_EXE: {
+      const char* procExe;
       if (lp->procExe) {
          attr = CRT_colors[Process_isUserlandThread(this) ? PROCESS_THREAD_BASENAME : PROCESS_BASENAME];
          if (lp->procExeDeleted)
             attr = CRT_colors[FAILED_READ];
-         xSnprintf(buffer, n, "%-15.15s ", lp->procExe + lp->procExeBasenameOffset);
+         procExe = lp->procExe + lp->procExeBasenameOffset;
       } else {
          attr = CRT_colors[PROCESS_SHADOW];
-         xSnprintf(buffer, n, "%-15.15s ", Process_isKernelThread(lp) ? kthreadID : "N/A");
+         procExe = Process_isKernelThread(lp) ? kthreadID : "N/A";
       }
-      break;
+      Process_printLeftAlignedField(str, attr, procExe, 15);
+      return;
    }
-   case CWD:
+   case CWD: {
+      const char* cwd;
       if (!lp->cwd) {
-         xSnprintf(buffer, n, "%-25s ", "N/A");
          attr = CRT_colors[PROCESS_SHADOW];
+         cwd = "N/A";
       } else if (String_startsWith(lp->cwd, "/proc/") && strstr(lp->cwd, " (deleted)") != NULL) {
-         xSnprintf(buffer, n, "%-25s ", "main thread terminated");
          attr = CRT_colors[PROCESS_SHADOW];
+         cwd = "main thread terminated";
       } else {
-         xSnprintf(buffer, n, "%-25.25s ", lp->cwd);
+         cwd = lp->cwd;
       }
-      break;
+      Process_printLeftAlignedField(str, attr, cwd, 25);
+      return;
+   }
    default:
       Process_writeField(this, str, field);
       return;

solaris/SolarisProcess.c

@@ -79,7 +79,7 @@ static void SolarisProcess_writeField(const Process* this, RichString* str, Proc
    case TASKID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, sp->taskid); break;
    case POOLID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, sp->poolid); break;
    case CONTID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, sp->contid); break;
-   case ZONE: xSnprintf(buffer, n, "%-*s ", ZONENAME_MAX/4, sp->zname); break;
+   case ZONE: Process_printLeftAlignedField(str, attr, sp->zname ? sp->zname : "global", ZONENAME_MAX/4); return;
    case PID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, sp->realpid); break;
    case PPID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, sp->realppid); break;
    case LWPID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, sp->lwpid); break;