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Annotation of 43BSD/contrib/icon/link/builtin.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Routines for determining if a name is a built-in function.
                      3:  */
                      4: 
                      5: #include "ilink.h"
                      6: 
                      7: /*
                      8:  * btable is an array of the names of the Icon builtin functions.
                      9:  */
                     10: char *btable[] = {
                     11: #define PDEF(p) "p",
                     12: #include "../h/pdef.h"
                     13: #undef PDEF
                     14:    };
                     15: 
                     16: #define NBUILTIN (sizeof(btable)/sizeof(char *)) 
                     17: 
                     18: /*
                     19:  * blocate - binary search for a builtin function.
                     20:  * If found, returns pointer to entry.
                     21:  */
                     22: 
                     23: blocate(s)
                     24: register char *s;
                     25:    {
                     26:    register int test, cmp;
                     27:    int low, high;
                     28: 
                     29:    low = 0;
                     30:    high = NBUILTIN;
                     31:    do {
                     32:       test = (low + high) / 2;
                     33:       cmp = strcmp(btable[test], s);
                     34:       if (cmp < 0)
                     35:          low = test + 1;
                     36:       else if (cmp > 0)
                     37:          high = test;
                     38:       else
                     39:          return (test+1);
                     40:       } while (low < high);
                     41:    return (0);
                     42:    }

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