4.3BSD - /usr/ingres/source/parser/s_name.c

   1: # include <ingres.h>
   2: # include "scanner.h"
   3: # include   <sccs.h>
   4: # include   <errors.h>
   5: 
   6: SCCSID(@(#)s_name.c	8.2	2/8/85)
   7: 
   8: /*
   9: ** NAME
  10: ** A name is defined to be a sequence of MAXNAME or fewer alphanumeric
  11: ** characters, starting with an alphabetic (underscore "_" is considered
  12: ** an alphabetic).  If it is not a keyword, each name is entered into
  13: ** the symbol table, indexed by 'yylval'.  A token is then returned for
  14: ** that name.
  15: */
  16: name(chr)
  17: char    chr;
  18: {
  19:     extern char     *yylval;
  20:     extern char     Cmap[];
  21:     char            namebuf[MAXNAME + 1];
  22:     register int        hi, lo, curr;
  23:     extern char     *syment();
  24: 
  25:     /* fill in the name */
  26:     yylval = namebuf;
  27:     *yylval = chr;
  28:     do
  29:     {
  30:         *++yylval = get_scan(NORMAL);
  31:         if ((yylval - namebuf) > MAXNAME)
  32:         {
  33:             /* name too long */
  34:             *yylval = '\0';
  35:             par_error(NAMELONG, WARN, namebuf, 0);
  36:         }
  37: 
  38:     }  while (Cmap[*yylval] == ALPHA || Cmap[*yylval] == NUMBR);
  39:     backup(*yylval);
  40:     *yylval = '\0';
  41: 
  42:     /* is it a keyword ? */
  43:     lo = 0;
  44:     hi = Keyent - 1;
  45:     while (lo <= hi)
  46:     {
  47:         curr = (lo + hi) / 2;
  48:         switch (scompare(Keyword[curr].term, MAXNAME, namebuf, MAXNAME))
  49:         {
  50:           case 1:
  51:             hi = curr - 1;
  52:             continue;
  53: 
  54:           case -1:
  55:             lo = curr + 1;
  56:             continue;
  57: 
  58:           case 0:
  59:             Lastok.toktyp = Tokens.sconst;
  60:             Lastok.tok = Keyword[curr].term;
  61:             Lastok.tokop = Keyword[curr].opcode;
  62:             yylval = (char *) Lastok.tokop;
  63:             return (Keyword[curr].token);
  64:         }
  65:     }
  66: 
  67:     /* else, USER DEFINED NAME */
  68: #	ifdef xSTR2
  69:     tTfp(71, 0, "name: %s\n", namebuf);
  70: #	endif
  71:     yylval = syment(namebuf, length(namebuf) + 1);
  72:     Lastok.tok = yylval;
  73:     Lastok.toktyp = Tokens.sconst;
  74:     Lastok.tokop = 0;
  75:     return (Tokens.name);
  76: }

Defined functions