libf2c/libF77/s_cmp.c

   1 #include "f2c.h"
   2
   3 /* compare two strings */
   4
   5 #ifdef KR_headers
   6 integer s_cmp(a0, b0, la, lb) char *a0, *b0; ftnlen la, lb;
   7 #else
   8 integer s_cmp(char *a0, char *b0, ftnlen la, ftnlen lb)
   9 #endif
  10 {
  11 register unsigned char *a, *aend, *b, *bend;
  12 a = (unsigned char *)a0;
  13 b = (unsigned char *)b0;
  14 aend = a + la;
  15 bend = b + lb;
  16
  17 if(la <= lb)
  18         {
  19         while(a < aend)
  20                 if(*a != *b)
  21                         return( *a - *b );
  22                 else
  23                         { ++a; ++b; }
  24
  25         while(b < bend)
  26                 if(*b != ' ')
  27                         return( ' ' - *b );
  28                 else    ++b;
  29         }
  30
  31 else
  32         {
  33         while(b < bend)
  34                 if(*a == *b)
  35                         { ++a; ++b; }
  36                 else
  37                         return( *a - *b );
  38         while(a < aend)
  39                 if(*a != ' ')
  40                         return(*a - ' ');
  41                 else    ++a;
  42         }
  43 return(0);
  44 }