171 lines
3.2 KiB
C
171 lines
3.2 KiB
C
/* U S E R O P T I O N - H A N D L I N G */
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#include <em_arith.h>
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#include <em_label.h>
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#include "class.h"
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#include "const.h"
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#include "idfsize.h"
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#include "main.h"
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#include "type.h"
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#include "nocross.h"
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#include "dbsymtab.h"
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#define MINIDFSIZE 9
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#if MINIDFSIZE < 9
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You fouled up! MINIDFSIZE has to be at least 10 or the compiler will not
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recognize some keywords!
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#endif
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extern int idfsize;
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DoOption(text)
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register char *text;
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{
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switch( *text++ ) {
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default:
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options[text[-1]]++; /* flags, debug options etc. */
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break;
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/* recognized flags:
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-i: largest value of set of integer
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-u, -U: allow underscore in identifier
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-w: no warnings
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-R: no range checks
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-A: range checks for array references
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and many more if DEBUG
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*/
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#ifdef DBSYMTAB
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case 'g':
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options['g'] = 1;
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options['n'] = 1;
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break;
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#endif
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case 'i': { /* largest value of set of integer */
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char *t = text;
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max_intset = txt2int(&t);
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text = t;
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if( max_intset <= (arith) 0 || *t ) {
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error("bad -i flag : use -i<num>");
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max_intset = 0;
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}
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break;
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}
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case 'M': { /* maximum identifier length */
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char *t = text;
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idfsize = txt2int(&t);
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text = t;
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if( idfsize <= 0 || *t ) {
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fatal("malformed -M option");
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/*NOTREACHED*/
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}
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if( idfsize > IDFSIZE ) {
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idfsize = IDFSIZE;
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warning("maximum identifier length is %d", IDFSIZE);
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}
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if( idfsize < MINIDFSIZE ) {
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idfsize = MINIDFSIZE;
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warning("minimum identifier length is %d", MINIDFSIZE);
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}
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break;
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}
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/* case 'u': /* underscore allowed in identifiers */
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/* class('_') = STIDF;
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/* inidf['_'] = 1;
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/* break;
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*/
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case 'V' : { /* set object sizes and alignment requirements */
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/* syntax : -V[ [w|i|l|f|p] size? [.alignment]? ]* */
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#ifndef NOCROSS
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register arith size;
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register int align;
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char c, *t;
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while( c = *text++ ) {
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char *strindex();
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t = text;
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size = txt2int(&t);
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align = 0;
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if( *(text = t) == '.' ) {
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t = text + 1;
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align = txt2int(&t);
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text = t;
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}
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if( !strindex("wilfpS", c) )
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error("-V: bad type indicator %c\n", c);
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if( size )
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switch( c ) {
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case 'w': /* word */
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word_size = size;
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break;
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case 'i': /* int */
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int_size = size;
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break;
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case 'l': /* long */
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long_size = size;
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break;
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case 'f': /* real */
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real_size = size;
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break;
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case 'p': /* pointer */
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pointer_size = size;
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break;
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case 'S': /* structure */
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/* discard size */
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break;
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}
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if( align )
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switch( c ) {
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case 'w': /* word */
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word_align = align;
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break;
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case 'i': /* int */
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int_align = align;
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break;
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case 'l': /* long */
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long_align = align;
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break;
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case 'f': /* real */
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real_align = align;
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break;
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case 'p': /* pointer */
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pointer_align = align;
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break;
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case 'S': /* initial record alignment */
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struct_align = align;
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break;
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}
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}
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break;
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#endif /* NOCROSS */
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}
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}
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}
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int
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txt2int(tp)
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register char **tp;
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{
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/* the integer pointed to by *tp is read, while increasing
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*tp; the resulting value is yielded.
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*/
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register int val = 0;
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register int ch;
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while( ch = **tp, ch >= '0' && ch <= '9' ) {
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val = val * 10 + ch - '0';
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(*tp)++;
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}
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return val;
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}
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