/*######################################################################  
  #                                                                    #  
  # This file contains some general utility functions for wmSMPmon.    #  
  #                                                                    #  
  # All of them were taken from the program 'top' from the procps      #  
  # suite.                                                             #  
  # With thanks to the author of top:                                  #  
  #                      James C. Warner <warnerjc@worldnet.att.net>   #  
  #                                                                    #  
  # This file is placed under the conditions of the GNU Library        #
  # General Public License, version 2, or any later version.           #
  # See file COPYING for information on distribution conditions.       #
  #                                                                    #  
  ######################################################################*/

# include "standards.h"
# include "general.h"

/*
 * The usual program end --
 * called only by functions in this section. */
void bye_bye (int eno, const char *str)
{
    fflush(stdout);
    if (str) {
      if (eno) perror(str);
      else {
        fputs(str, stderr);
        eno = 1;
      }
    }
    exit(eno);
}

    /*
     * This routine simply formats whatever the caller wants and
     * returns a pointer to the resulting 'const char' string... */
const char *fmtmk (const char *fmts, ...)
{
    static char buf[BIGBUFSIZ];          /* with help stuff, our buffer */
    va_list va;                          /* requirements exceed 1k */
    
    va_start(va, fmts);
    vsnprintf(buf, sizeof(buf), fmts, va);
    va_end(va);
    return (const char *)buf;
}


    /*
     * Standard error handler to normalize the look of all err o/p */
void std_err (const char *str)
{
    static char buf[SMLBUFSIZ];
    
    fflush(stdout);
        /* we'll use our own buffer so callers can still use fmtmk()
         * and, yes the leading tab is not the standard convention,
         * but the standard is wrong -- OUR msg won't get lost in
         * screen clutter, like so many others! */
    snprintf(buf, sizeof(buf), "\t%s: %s\n", Myname, str);
    
        /* not to worry, he'll change our exit code to 1 due to 'buf' */
    bye_bye(0, buf);
}

    /*
     * Handle our own memory stuff without the risk of leaving the
     * user's terminal in an ugly state should things go sour. */
void *alloc_c (unsigned numb)
{     
    void * p; 
    
    if (!numb) ++numb; 
    if (!(p = calloc(1, numb)))
        std_err("failed memory allocate");
    return p;
}