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Annotation of 42BSD/ingres/source/parser/s_comment.c, revision 1.1.1.1

1.1       root        1: 
                      2: # include <ingres.h>
                      3: # include "scanner.h"
                      4: # include      <sccs.h>
                      5: 
                      6: SCCSID(@(#)s_comment.c 7.3     5/4/83)
                      7: 
                      8: /*
                      9: ** COMMENT
                     10: ** scans comments (as delimited by the tokens 'Tokens.bgncmnt'
                     11: ** and 'Tokens.endcmnt') and removes them from the query text.
                     12: */
                     13: comment()
                     14: {
                     15:        register int            i, l;
                     16:        register struct optab   *op;
                     17:        register        char    *sp;
                     18:        char                    buf[3];
                     19: 
                     20:        /* find the end_of_comment operator */
                     21:        for (op = Optab; op->term; op++)
                     22:                if (op->token == Tokens.endcmnt)
                     23:                        break;
                     24:        if (!op->term)
                     25:                syserr("no end_of_comment token");
                     26: 
                     27:        /* scan for the end of the comment */
                     28:        l = length(op->term);
                     29:        for (i = 0,sp = buf; i < l; sp++, i++)          /* set up window on input */
                     30:                if ((*sp = get_scan(NORMAL)) <= 0)
                     31:                        /* non-terminated comment */
                     32:                        par_error(COMMTERM, FATAL, 0);          /* must end parsing */
                     33:        while (!bequal(buf, op->term, l))
                     34:        {
                     35:                /* move window on input */
                     36:                for (sp = buf,i = 0; i < l-1; i++,sp++)
                     37:                        *sp = *(sp+1);
                     38:                if (( *sp = get_scan(NORMAL)) <= 0)
                     39:                        /* non terminated comment */
                     40:                        par_error(COMMTERM, FATAL, 0);          /* must end parsing */
                     41:        }
                     42:        return (0);
                     43: }

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