📄 system.v
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The following changes were made by Herb Norton to the files on the
1.01 distribution disk of software from "Compiler Design in C" to get it to
compile under System V UNIX, comments in double brackets [[like this]] are my
own:
-Allen Holub
----------------------------------------------------------------------
bin directory
1. In the pp command, the C Shell constructs were replaced with the use
of basename.
include directory
2. The curses.h file was renamed to o.curses.h so that the system
curses.h would be picked up. Otherwise, an unresolved reference to
the winch function occurs.
3. In the search.h file, a semicolon was added to the end of the line
defining the bsearch function. The lack of this semicolon caused
obscure error messages and it was difficult to find.
[[This is a bug and will be fixed in release 1.02 of the sofware. -ah]]
include/tools directory
4. In compiler.h all instances of _iobuf were changed to FILE to be
consistent with declarations elsewhere.
[[ This is probably a bug too, but I've left it alone on the distribution
disk for 2 reasons: (1) Compiler.h is generated automatically by
Microsoft C, which doesn't process typedefs correctly when it creates
prototypes and (2) If you say "struct _iobuf" you don't have to #include
<stdio.h> before <tools/compiler.h>. This is really not a great idea
--you should include <stdio.h> first and use FILE, but I don't want to
break existing code that doesn't do it right. -ah]]
5. In debug.h the #define of memmove was changed from bcopy to memcpy
and the #define of memcpy was commented out.
[[ Note that this change assumes that your memcpy() handles overlapping
strings correctly. If you have a memmove() that supports overlapping
strings, then remove the #define of memmove() to memcpy() from
debug.h. -ah]]
6. In hash.h some prototype definitions were removed because of
duplications.
src/compiler/lib directory
7. In concat.c the #pragma loop_opt and the surrounding #ifdef and
#endif lines were removed. Even those these lines are only for
MSDOS, the Unix cpp complains about the #pragma line.
8. In driver.c the #include of tools/compiler.h was commented out
because of problems, although this could possible have been related
to the missing semicolon problem in 3.
9. In hash.c, the code using ftime was removed, because our system does
not have an ftime.
10. In yydebug.h, SIGIO was defined as SIGUSR1, <fcntl.h> was included
to define F_SETL, and the use of FASYNC was eliminated, since it is
not provided on our system. The to_log function was moved so it was
defined before it was used. The use of ftime was changed to a use
of time.
src/compiler/lex directory
11. In lex.c, the declaration of the driver_1 function as returning a
pointer to a FILE was removed, since it was incorrect.
[[ But driver_1() does indeed return a FILE pointer---I'm not sure what
was going on here. -ah]]
12. In squash.c, <memory.h> was included.
src/compiler/parser directory
13. In main.c, the code using ftime was removed. Actually, some was
changed to time, but the printing was removed.
14. In makefile (the Unix one), follow.o was moved from LLOBJ to COMOBJ
to resolve references. When building occs after build the second
version of llama, the instructions should tell you to touch acts.c
or the makefile should be changed to force acts.pp.c to be rebuilt
because there are LL and OX macros that expand differently when you
are building llama or occs.
src/compiler/c directory
15. In makefile, lexyy.o was moved to the end of OBJ to resolve
references. In the call to occs for c.y, the T parameter was added
to force creation of yyoutab.c which is expected by the makefile.
[[ The -T was deliberately omitted because I had intended to make the tables
only once (with the occs -T option), not every time I changed an action.
Theres a "tables:" dependancy in the makefile for this purpose.
Since occs is not the world's fastest program, I saw no point in wasting
time making tables if the grammar had not been changed (ie. if only the
action code had been changed). Adding the -T will force occs to make the
tables all the time, thereby slowing down the compilation process if all
you change is an action in c.y. -ah]]
16. In yyact.c the #define ALLOC was removed because it is already in
yyout.c and two of them cause multiple definitions.
src/compiler/c and src/compiler/parser directories
17. The .par files say that the path to them should be put in the LIB
environment, but I was not able to figure out how to do this, so I
ended up copying them the the directories where they were needed.
[[ You do this in the C shell with:
setenv LIB <path_name>
In the Bourne and Korn shells, use the following:
LIB=<path_name>
export LIB
-ah ]]
******************************************************************************
Diff of c makefile
12,13c12,13
< OBJ = decl.o gen.o local.o main.o op.o switch.o \
< symtab.o temp.o value.o yyact.o yyout.o yyoutab.o lexyy.o
---
> OBJ = decl.o gen.o lexyy.o local.o main.o op.o switch.o \
> symtab.o temp.o value.o yyact.o yyout.o yyoutab.o
32,33c32,33
< yyout.c: c.y
< $(OCCS) -vlWDSTp c.y
---
> _yyout.c: c.y
> $(OCCS) -vlWDSp c.y
******************************************************************************
Diff of compiler.h
15c15
< extern void defnext P((struct FILE *fp,char *name));
---
> extern void defnext P((struct _iobuf *fp,char *name));
19,20c19,20
< extern struct FILE *driver_1 P((struct FILE *output,int lines,char *file_name));
< extern int driver_2 P((struct FILE *output,int lines));
---
> extern struct _iobuf *driver_1 P((struct _iobuf *output,int lines,char *file_name));
> extern int driver_2 P((struct _iobuf *output,int lines));
30c30
< extern void fputstr P((char *str,int maxlen,struct FILE *stream));
---
> extern void fputstr P((char *str,int maxlen,struct _iobuf *stream));
66,67c66,67
< extern int pairs P((struct FILE *fp,int *array,int nrows,int ncols,char *name,int threshold,int numbers));
< extern void pnext P((struct FILE *fp,char *name));
---
> extern int pairs P((struct _iobuf *fp,int *array,int nrows,int ncols,char *name,int threshold,int numbers));
> extern void pnext P((struct _iobuf *fp,char *name));
71c71
< extern void pchar P((int c,struct FILE *stream));
---
> extern void pchar P((int c,struct _iobuf *stream));
75c75
< extern void print_array P((struct FILE *fp,int *array,int nrows,int ncols));
---
> extern void print_array P((struct _iobuf *fp,int *array,int nrows,int ncols));
79,80c79,80
< extern void printv P((struct FILE *fp,char * *argv));
< extern void comment P((struct FILE *fp,char * *argv));
---
> extern void printv P((struct _iobuf *fp,char * *argv));
> extern void comment P((struct _iobuf *fp,char * *argv));
******************************************************************************
Diff of concat.c
5a6,9
> #ifdef MSDOS
> #pragma loop_opt(off) /* Can't do loop optimizations (alias problems) */
> #endif
>
******************************************************************************
Diff of debug.h
28,29c28,29
< # define memmove(d,s,n) memcpy(s,d,n)
< /* # define memcpy(d,s,n) bcopy(s,d,n) */
---
> # define memmove(d,s,n) bcopy(s,d,n)
> # define memcpy(d,s,n) bcopy(s,d,n)
******************************************************************************
Diff of driver.c
7c7
< /* #include <tools/compiler.h> /* for prototypes */
---
> #include <tools/compiler.h> /* for prototypes */
******************************************************************************
Diff of hash.c
461a462,463
> ftime( &start_time );
>
485a488,491
> ftime( &end_time );
> time1 = (start_time.time * 1000) + start_time.millitm ;
> time2 = ( end_time.time * 1000) + end_time.millitm ;
> printf( "Elapsed time = %g seconds\n", (time2-time1) / 1000 );
******************************************************************************
Diff of hash.h
22a23
> extern HASH_TAB *maketab P(( unsigned maxsym, unsigned (*hash)(), int(*cmp)()));
28a30,32
> extern int ptab P(( HASH_TAB *tabp, void(*prnt)(), void *par, int srt));
> unsigned hash_add P(( unsigned char *name )); /* in hashadd.c */
> unsigned hash_pjw P(( unsigned char *name )); /* in hashpjw.c */
******************************************************************************
Diff of lex.c
190c190
< FILE *input; /* Template file for driver */
---
> FILE *input, *driver_1(); /* Template file for driver */
******************************************************************************
Diff of lldriver.c
79d78
< printf("Finished driver_2");
******************************************************************************
Diff of main.c
298,299c298,299
< long *start_time, *end_time ;
< long dtime;
---
> struct timeb start_time, end_time ;
> long time;
301c301
< time( &start_time ); /* Initialize times now so that the difference */
---
> ftime( &start_time ); /* Initialize times now so that the difference */
326c326
< time( &start_time );
---
> ftime( &start_time );
334c334
< time ( &end_time );
---
> ftime ( &end_time );
340a341,348
> }
>
> if( Verbose )
> {
> time = ( end_time.time * 1000) + end_time.millitm ;
> time -= (start_time.time * 1000) + start_time.millitm ;
> printf( "time required to make tables: %ld.%-03ld seconds\n",
> (time/1000), (time%1000));
******************************************************************************
Diff of parser makefile
53,54c53,54
< COMOBJ = main.o acts.o lexyy.o first.o stok.o follow.o
< LLOBJ = llselect.o llcode.o lldriver.o lldollar.o
---
> COMOBJ = main.o acts.o lexyy.o first.o stok.o
> LLOBJ = llselect.o llcode.o lldriver.o follow.o lldollar.o
******************************************************************************
Diff of pp
14c14,15
< echo making $1.pp.c
---
> set fname=$1:t
> echo making $fname:r.pp.c
16c17
< | sed 's/^# \([0-9]\)/#line \1/' > `basename $1 '.c'`.pp.c
---
> | sed 's/^# \([0-9]\)/#line \1/' > $fname:r.pp.c
******************************************************************************
Diff of search.h
14c14
< extern char *bsearch( );
---
> extern char *bsearch( )
******************************************************************************
Diff of squash.c
8d7
< # include <memory.h>
******************************************************************************
Diff of yyact.c
21a22
> #define ALLOC /* Define ALLOC to create symbol table in symtab.h. */
******************************************************************************
diff of yydebug.c
2,3d1
< #define SIGIO SIGUSR1
<
6d3
< #include <fcntl.h>
208c205
< UX( fcntl( fileno(stdin), F_SETFL, flags ); )
---
> UX( fcntl( fileno(stdin), F_SETFL, flags | FASYNC ); )
920,972d916
<
< /*----------------------------------------------------------------------*/
<
< PRIVATE FILE *to_log( buf )
< char *buf;
< {
< /* Set up everything to log output to a file (open the log file, etc.). */
<
< if( !yyprompt("Log-file name (CR for \"log\", ESC cancels): ", buf,1) )
< return NULL;
<
< if( !*buf )
< strcpy( buf, "log" );
<
< if( !(Log = fopen( buf, "w")) )
< {
< NEWLINE(Prompt_window );
< wprintw(Prompt_window, "Can't open %s", buf );
< presskey();
< return NULL;
< }
<
< if( !yyprompt("Log comment-window output? (y/n, CR=y): ", buf,0) )
< return NULL;
< else
< No_comment_pix = (*buf == 'n');
<
< if( !yyprompt( "Print stack pictures in log file? (y/n, CR=y): ",buf,0) )
< return NULL;
<
< if( !(No_stack_pix = (*buf == 'n')) )
< {
< if( !yyprompt( "Print stacks horizontally? (y/n, CR=y): ",buf,0) )
< return NULL;
<
< if( Horiz_stack_pix = (*buf != 'n') )
< {
< if( !yyprompt("Print SYMBOL stack (y/n, CR=y): ",buf,0) )
< return NULL;
< Sym_pix = (*buf != 'n');
<
< if( !yyprompt("Print PARSE stack (y/n, CR=y): ",buf,0) )
< return NULL;
< Parse_pix = (*buf != 'n');
<
< if( !yyprompt("Print VALUE stack (y/n, CR=y): ",buf,0) )
< return NULL;
< Attr_pix = (*buf != 'n');
< }
< }
< return Log;
< }
<
987c931
< long time_buf;
---
> struct timeb time_buf; /* defined in sys/timeb.h */
1010,1011c954,955
< time( &time_buf );
< start = time_buf;
---
> ftime( &time_buf );
> start = (time_buf.time * 1000) + time_buf.millitm;
1015,1016c959,960
< time( &time_buf );
< current = time_buf;
---
> ftime( &time_buf );
> current = (time_buf.time * 1000) + time_buf.millitm;
1379a1324,1376
>
> /*----------------------------------------------------------------------*/
>
> PRIVATE FILE *to_log( buf )
> char *buf;
> {
> /* Set up everything to log output to a file (open the log file, etc.). */
>
> if( !yyprompt("Log-file name (CR for \"log\", ESC cancels): ", buf,1) )
> return NULL;
>
> if( !*buf )
> strcpy( buf, "log" );
>
> if( !(Log = fopen( buf, "w")) )
> {
> NEWLINE(Prompt_window );
> wprintw(Prompt_window, "Can't open %s", buf );
> presskey();
> return NULL;
> }
>
> if( !yyprompt("Log comment-window output? (y/n, CR=y): ", buf,0) )
> return NULL;
> else
> No_comment_pix = (*buf == 'n');
>
> if( !yyprompt( "Print stack pictures in log file? (y/n, CR=y): ",buf,0) )
> return NULL;
>
> if( !(No_stack_pix = (*buf == 'n')) )
> {
> if( !yyprompt( "Print stacks horizontally? (y/n, CR=y): ",buf,0) )
> return NULL;
>
> if( Horiz_stack_pix = (*buf != 'n') )
> {
> if( !yyprompt("Print SYMBOL stack (y/n, CR=y): ",buf,0) )
> return NULL;
> Sym_pix = (*buf != 'n');
>
> if( !yyprompt("Print PARSE stack (y/n, CR=y): ",buf,0) )
> return NULL;
> Parse_pix = (*buf != 'n');
>
> if( !yyprompt("Print VALUE stack (y/n, CR=y): ",buf,0) )
> return NULL;
> Attr_pix = (*buf != 'n');
> }
> }
> return Log;
> }
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