4.3BSD - /usr/src/new/icon/operators/lexle.c

   1: #include "../h/rt.h"
   2: 
   3: /*
   4:  * x <<= y - test if x is lexically less than or equal to y.
   5:  */
   6: 
   7: lexle(nargs, arg2, arg1, arg0)
   8: int nargs;
   9: struct descrip arg2, arg1, arg0;
  10:    {
  11:    DclSave
  12:    register int t;
  13:    char sbuf1[MAXSTRING], sbuf2[MAXSTRING];
  14:    extern char *alcstr();
  15: 
  16:    SetBound;
  17:    /*
  18:     * x and y must be strings.  Save the cvstr return value for y because
  19:     *  y is the result (if any).
  20:     */
  21:    if (cvstr(&arg1, sbuf1) == NULL)
  22:       runerr(103, &arg1);
  23:    if ((t = cvstr(&arg2, sbuf2)) == NULL)
  24:       runerr(103, &arg2);
  25: 
  26:    /*
  27:     * lexcmp does the work.
  28:     */
  29:    if (lexcmp(&arg1, &arg2) > 0)
  30:       fail();
  31: 
  32:    /*
  33:     * Return y as the result of the comparison.  If y was converted to
  34:     *  a string, a copy of it is allocated.
  35:     */
  36:    arg0 = arg2;
  37:    if (t == 1)
  38:       STRLOC(arg0) = alcstr(STRLOC(arg0), STRLEN(arg0));
  39:    ClearBound;
  40:    }
  41: 
  42: Opblock(lexle,2,"<<=")

Defined functions