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produce ANSI C under -a option

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This commit is contained in:
ceriel 1991-11-26 15:38:41 +00:00
parent f4ecd50601
commit 35260bae58
10 changed files with 253 additions and 59 deletions
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4
util/LLgen/LLgen.1
View file

@ -4,7 +4,7 @@
.SH NAME
LLgen, an extended LL(1) parser generator
.SH SYNOPSIS
LLgen [ \-vxw ] [ \-j[\fInum\fP] ] [ \-l\fInum\fP ] [ \-h\fInum\fP ] file ...
LLgen [ \-vxwa ] [ \-j[\fInum\fP] ] [ \-l\fInum\fP ] [ \-h\fInum\fP ] file ...
.SH DESCRIPTION
\fILLgen\fP
converts a context-free grammar into a set of
@ -76,6 +76,8 @@ symbols and these extended sets are also included in the
file.
.IP \fB\-w\fP
no warnings are given.
.IP \fB\-a\fP
Produce ANSI C function headers and prototypes.
.IP \fB\-j\fP[\fInum\fP]
when this flag is given, \fILLgen\fP will generate dense switches,
so that the compiler can generate a jump table for it. This will only be

29
util/LLgen/lib/incl
View file

@ -25,3 +25,32 @@ extern int LLcsymb;
#define LLtdecr(d) {LL_assert(LLtcnt[d] > 0); LLtcnt[d]--;}
#define LLsincr(d) LLscnt[d]++
#define LLtincr(d) LLtcnt[d]++
#if LL_ANSI_C
extern int LL_LEXI(void);
extern void LLread(void);
extern int LLskip(void);
extern int LLnext(int);
extern void LLerror(int);
extern void LLnewlevel(unsigned int *);
extern void LLoldlevel(unsigned int *);
#ifndef LL_FASTER
extern void LLscan(int);
#endif
#ifndef LLNOFIRSTS
extern int LLfirst(int, int);
#endif
#else /* not LL_ANSI_C */
extern LLread();
extern int LLskip();
extern int LLnext();
extern LLerror();
extern LLnewlevel();
extern LLoldlevel();
#ifndef LL_FASTER
extern LLscan();
#endif
#ifndef LLNOFIRSTS
extern int LLfirst();
#endif
#endif /* not LL_ANSI_C */

106
util/LLgen/lib/rec
View file

@ -12,28 +12,26 @@ unsigned int LLscnt[LL_NSETS];
int LLcsymb, LLsymb;
static int LLlevel;
/* In this file are defined: */
extern LLread();
extern int LLskip();
extern int LLnext();
#ifndef LL_FASTER
extern LLscan();
#if LL_ANSI_C
void LLmessage(int);
#endif
extern LLerror();
# ifndef LLNOFIRSTS
extern int LLfirst();
# endif
extern LLnewlevel();
extern LLoldlevel();
#ifdef LL_USERHOOK
#if LL_ANSI_C
static void LLdoskip(int);
static int LLuserhook(int, int*);
#else
static LLdoskip();
static int LLuserhook();
#endif
#endif
#ifndef LL_FASTER
#if LL_ANSI_C
void LLscan(int t)
#else
LLscan(t)
int t;
#endif
{
/*
* Check if the next symbol is equal to the parameter
@ -48,7 +46,11 @@ LLscan(t)
}
#endif
#if LL_ANSI_C
void LLread(void) {
#else
LLread() {
#endif
for (;;) {
if ((LLcsymb = LLindex[(LLsymb = LL_LEXI())]) >= 0) return;
LLmessage(0);
@ -56,8 +58,12 @@ LLread() {
/* NOTREACHED */
}
#if LL_ANSI_C
void LLerror(int t)
#else
LLerror(t)
int t;
#endif
{
register int i;
@ -67,7 +73,7 @@ LLerror(t)
#ifdef LL_USERHOOK
static int lst[] = { EOFILE, 0 };
if (LLuserhook(EOFILE, lst)) /* nothing */;
#endif LL_USERHOOK
#endif /* LL_USERHOOK */
if (LLsymb != EOFILE && LLsymb > 0) {
LLmessage(-1);
while ((LLsymb = LL_LEXI()) > 0 && LLsymb != EOFILE)
@ -92,7 +98,11 @@ LLerror(t)
}
#ifndef LLNOFIRSTS
LLfirst(x, d) {
#if LL_ANSI_C
int LLfirst(int x, int d) {
#else
int LLfirst(x, d) {
#endif
register int i;
return (i = LLindex[x]) >= 0 &&
@ -100,8 +110,12 @@ LLfirst(x, d) {
}
#endif
LLnext(n)
#if LL_ANSI_C
int LLnext(int n)
#else
int LLnext(n)
int n;
#endif
{
/* returns: 0 if the current symbol is'nt skipped, and it
is'nt a member of "n",
@ -122,7 +136,11 @@ LLnext(n)
return retval;
}
LLskip() {
#if LL_ANSI_C
int LLskip(void) {
#else
int LLskip() {
#endif
/* returns 0 if the current symbol is'nt skipped, and
1 if it is, t.i., we have a new symbol
*/
@ -130,20 +148,27 @@ LLskip() {
return LLdoskip(0);
}
static int
LLuserhook(exp, list)
int exp;
#if LL_ANSI_C
extern void LL_USERHOOK(int, int *);
static int LLuserhook(int e, int *list)
#else
static int LLuserhook(e, list)
int e;
int *list;
#endif
{
int old = LLsymb;
LL_USERHOOK(exp, list);
LL_USERHOOK(e, list);
LLread();
return LLsymb != old;
}
static
LLmklist(list)
#if LL_ANSI_C
static void LLmklist(register int *list)
#else
static LLmklist(list)
register int *list;
#endif
{
char Xset[LL_SSIZE];
register char *p;
@ -167,13 +192,16 @@ LLmklist(list)
*list = 0;
}
static
LLdoskip(exp)
int exp;
#if LL_ANSI_C
static int LLdoskip(int e)
#else
static int LLdoskip(e)
int e;
#endif
{
int LLx;
int list[LL_NTERMINALS+1];
#endif LL_USERHOOK
#endif /* LL_USERHOOK */
register int i;
int retval;
int LLi, LLb;
@ -181,13 +209,13 @@ LLdoskip(exp)
retval = 0;
#ifdef LL_USERHOOK
LLmklist(list);
LLx = LLuserhook(exp, list);
LLx = LLuserhook(e, list);
if (LLx) retval = 1;
#endif LL_USERHOOK
#endif /* LL_USERHOOK */
for (;;) {
if (LLtcnt[LLcsymb] != 0) {
#ifdef LL_USERHOOK
if (!exp || !LLx || LLcsymb == LLindex[exp])
if (!e || !LLx || LLcsymb == LLindex[e])
#endif
return retval;
}
@ -197,7 +225,7 @@ LLdoskip(exp)
if (LLscnt[i] != 0) {
if (LLsets[LL_SSIZE*i+LLi] & LLb) {
#ifdef LL_USERHOOK
if (!exp || !LLx || LLcsymb == LLindex[exp])
if (!e || !LLx || LLcsymb == LLindex[e])
#endif
return retval;
}
@ -205,10 +233,10 @@ LLdoskip(exp)
}
#ifdef LL_USERHOOK
if (LLx) {
LLx = LLuserhook(exp, list);
LLx = LLuserhook(e, list);
continue;
}
#endif LL_USERHOOK
#endif /* LL_USERHOOK */
LLmessage(0);
retval = 1;
LLread();
@ -216,7 +244,11 @@ LLdoskip(exp)
/* NOTREACHED */
}
#if LL_ANSI_C
void LLnewlevel(unsigned int *LLsinfo) {
#else
LLnewlevel(LLsinfo) unsigned int *LLsinfo; {
#endif
register int i;
if (LLlevel++) {
@ -234,9 +266,11 @@ LLnewlevel(LLsinfo) unsigned int *LLsinfo; {
LLtincr(0);
}
LLoldlevel(LLsinfo)
unsigned int *LLsinfo;
{
#if LL_ANSI_C
void LLoldlevel(unsigned int *LLsinfo) {
#else
LLoldlevel(LLsinfo) unsigned int *LLsinfo; {
#endif
register int i;
LLtdecr(0);

2
util/LLgen/src/LLgen.g
View file

@ -29,6 +29,7 @@ static string rcsid = "$Header$";
p_mem alloc(), ralloc();
string store();
p_gram search();
long ftell();
static int nparams; /* parameter count for nonterminals */
static int acount; /* count #of global actions */
@ -211,6 +212,7 @@ rule { register p_nont p;
p->n_count = acount;
acount = 0;
p->n_lineno = linecount;
p->n_off = ftell(fact);
}
[ params { p->n_flags |= PARAMS;
if (nparams > 15) {

46
util/LLgen/src/compute.c
View file

@ -131,19 +131,48 @@ do_compute() {
STATIC
createsets() {
/*
* Allocate space for the sets
* Allocate space for the sets. Also determine which files use
* which nonterminals, and determine which nonterminals can be
* made static.
*/
register p_nont p;
register p_file f;
register p_start st;
register int i;
int n = NINTS(NBYTES(nnonterms));
p_mem alloc();
for (p = nonterms; p < maxnt; p++) {
for (f = files; f < maxfiles; f++) {
register p_set s;
f->f_used = s = (p_set) alloc((unsigned)n*sizeof(*(f->f_used)));
for (i = n; i; i--) *s++ = 0;
for (i = f->f_nonterminals; i != -1; i = p->n_next) {
p = &nonterms[i];
p->n_flags |= GENSTATIC;
p->n_first = get_set();
p->n_follow = get_set();
walk(p->n_rule);
walk(f->f_used, p->n_rule);
}
}
for (f = files; f < maxfiles; f++) {
for (i = f->f_nonterminals; i != -1; i = p->n_next) {
register p_file f2;
p = &nonterms[i];
for (f2 = files; f2 < maxfiles; f2++) {
if (f2 != f && IN(f2->f_used, i)) {
p->n_flags &= ~GENSTATIC;
}
}
}
}
for (st = start; st; st = st->ff_next) {
nonterms[st->ff_nont].n_flags &= ~GENSTATIC;
}
}
STATIC
walk(p) register p_gram p; {
walk(u, p) p_set u; register p_gram p; {
/*
* Walk through the grammar rule p, allocating sets
*/
@ -156,7 +185,7 @@ walk(p) register p_gram p; {
q = g_getterm(p);
q->t_first = get_set();
q->t_follow = get_set();
walk(q->t_rule);
walk(u, q->t_rule);
break; }
case ALTERNATION : {
register p_link l;
@ -164,7 +193,12 @@ walk(p) register p_gram p; {
l = g_getlink(p);
l->l_symbs = get_set();
l->l_others = get_set();
walk(l->l_rule);
walk(u, l->l_rule);
break; }
case NONTERM : {
register int i = g_getcont(p);
PUTIN(u, i);
break; }
case EORULE :
return;

1
util/LLgen/src/extern.h
View file

@ -75,3 +75,4 @@ extern string rec_file, incl_file;
extern int low_percentage, high_percentage;
extern int min_cases_for_jmptable;
extern int jmptable_option;
extern int ansi_c;

100
util/LLgen/src/gencode.c
View file

@ -56,6 +56,8 @@ STATIC prset();
STATIC macro();
STATIC controlline();
STATIC getparams();
STATIC getansiparams();
STATIC genprototypes();
STATIC gettok();
STATIC rulecode();
STATIC int * dopush();
@ -113,6 +115,8 @@ gencode(argc) {
opentemp(f_input);
correct_prefix();
/* generate code ... */
if (ansi_c) fputs("#define LL_ANSI_C 1\n", fpars);
fprintf(fpars, "#define LL_LEXI %s\n", lexical);
copyfile(incl_file);
generate(p);
getaction(2);
@ -123,6 +127,7 @@ gencode(argc) {
}
geninclude();
genrecovery();
fclose(fact);
}
STATIC
@ -165,8 +170,10 @@ genrecovery() {
opentemp((string) 0);
f = fpars;
correct_prefix();
copyfile(incl_file);
if (!firsts) fputs("#define LLNOFIRSTS\n", f);
if (ansi_c) fputs("#define LL_ANSI_C 1\n", f);
fprintf(f, "#define LL_LEXI %s\n", lexical);
copyfile(incl_file);
for (st = start; st; st = st->ff_next) {
/* Make sure that every set the parser needs is in the list
* before generating a define of the number of them!
@ -178,17 +185,23 @@ genrecovery() {
}
i = maxptr - setptr;
fprintf(f,
"#define LL_LEXI %s\n#define LL_SSIZE %d\n#define LL_NSETS %d\n#define LL_NTERMINALS %d\n",
lexical,
"#define LL_SSIZE %d\n#define LL_NSETS %d\n#define LL_NTERMINALS %d\n",
nbytes,
i > 0 ? i : 1,
ntokens);
if (onerror) fprintf(f,"#define LL_USERHOOK %s\n", onerror);
/* Now generate the routines that call the startsymbols */
for (st = start; st; st = st->ff_next) {
fputs(st->ff_name, f);
if (ansi_c) for (st = start; st; st = st->ff_next) {
p = &nonterms[st->ff_nont];
fputs("() {\n\tunsigned int s[LL_NTERMINALS+LL_NSETS+2];\n\tLLnewlevel(s);\n\tLLread();\n", f);
fputs("void ", f);
genextname(st->ff_nont, p->n_name, f);
fputs("(void);\n", f);
}
for (st = start; st; st = st->ff_next) {
if (ansi_c) fputs("void ", f);
fprintf(f, "%s(%s)", st->ff_name, ansi_c ? "void" : "");
p = &nonterms[st->ff_nont];
fputs(" {\n\tunsigned int s[LL_NTERMINALS+LL_NSETS+2];\n\tLLnewlevel(s);\n\tLLread();\n", f);
if (g_gettype(p->n_rule) == ALTERNATION) {
genpush(findindex(p->n_contains));
}
@ -238,6 +251,7 @@ generate(f) p_file f; {
int i;
register p_first ff;
int mustpop;
int is_first = 1;
fprintf(fpars, "#define LL_LEXI %s\n", lexical);
listcount = 0;
@ -258,13 +272,18 @@ generate(f) p_file f; {
getntparams(p) == 0) {
continue;
}
if (is_first) genprototypes(f);
is_first = 0;
if (p->n_flags & GENSTATIC) fputs("static ", fpars);
if (ansi_c) fputs("void ", fpars);
genextname(s, p->n_name, fpars);
if (p->n_flags & PARAMS) {
fputs("(\n", fpars);
controlline();
getparams();
if (ansi_c) getansiparams(1);
else getparams();
}
else fputs("() {\n", fpars);
else fprintf(fpars, "(%s) {\n", ansi_c ? "void" : "");
if (p->n_flags & LOCALS) getaction(1);
i = getntsafe(p);
mustpop = NOPOP;
@ -380,6 +399,71 @@ getparams() {
fprintf(fpars, "%c {\n",add_semi);
}
STATIC
genprototypes(f)
register p_file f;
{
/*
* Generate prototypes for all nonterminals
*/
register int i;
register p_nont p;
long off = ftell(fact);
for (i = 0; i < nnonterms; i++) {
if (! IN(f->f_used, i)) continue;
p = &nonterms[i];
if (g_gettype(p->n_rule) == EORULE &&
getntparams(p) == 0) {
continue;
}
if (ansi_c || (p->n_flags & GENSTATIC)) {
if (p->n_flags & GENSTATIC) fputs("static ", fpars);
if (ansi_c) fputs("void ", fpars);
genextname(i, p->n_name, fpars);
if (! ansi_c) fputs("();\n", fpars);
else if (p->n_flags & PARAMS) {
fputs("(\n", fpars);
fseek(fact, p->n_off, 0);
controlline();
getansiparams(0);
fseek(fact, off, 0);
}
else fputs("(void);\n", fpars);
}
}
}
STATIC
getansiparams(mkdef) {
/* getansiparams is called if a nonterminal has parameters
* and an ANSI C function definition/declaration has to be produced.
* If a definition has to be produced, "mkdef" is set to 1.
*/
register int l;
char add_semi = ' ';
int delayed = 0;
ltext[0] = '\0';
while ((l = gettok()) != ENDDECL) {
if (delayed) {
fputc(',', fpars);
delayed = 0;
}
if ((l == ';' || l == ',') && ltext[0] != '\0') {
/*
* The last identifier found before a ';' or a ','
* must be a parameter
*/
delayed = 1;
ltext[0] = '\0';
}
else if (l == IDENT) fprintf(fpars, "%s", ltext);
else fputc(l, fpars);
}
fprintf(fpars, ") %c\n", mkdef ? '{' : ';');
}
STATIC
gettok() {
/* Read from the action file. */

1
util/LLgen/src/global.c
View file

@ -66,3 +66,4 @@ string rec_file, incl_file;
int low_percentage = 10, high_percentage = 30;
int min_cases_for_jmptable = 8;
int jmptable_option;
int ansi_c = 0;

4
util/LLgen/src/main.c
View file

@ -100,6 +100,10 @@ main(argc,argv) register string argv[]; {
ntneeded = 1;
ntprint = 1;
continue;
case 'a':
case 'A':
ansi_c = 1;
continue;
default:
fprintf(stderr,"illegal option : %c\n",*arg);
exit(1);

3
util/LLgen/src/types.h
View file

@ -105,6 +105,7 @@ typedef struct {
*/
# define getntparams(p) ((p)->n_flags&017)
# define setntparams(p,i) {assert(((unsigned)(i))<=017);(p)->n_flags&=~017;(p)->n_flags|=(i);}
# define GENSTATIC 01000 /* set if routine can be made static */
# define RECURSIVE 02000 /* Set if the default rule is recursive */
# define PARAMS 04000 /* tells if a nonterminal has parameters */
# define EMPTY 010000 /* tells if a nonterminal produces empty */
@ -133,6 +134,7 @@ typedef struct {
p_set n_contains; /* pointer to symbols that can be produced */
string n_name; /* name of nonterminal */
int n_next; /* index of next nonterminal */
long n_off; /* index of parameters in action file */
} t_nont, *p_nont;
/*
@ -225,6 +227,7 @@ typedef struct f_file {
*/
int f_nonterminals; /* list of nonterminals in this file */
int f_terminals; /* list of terminals in this file */
p_set f_used; /* set of nonterminals used in this file */
} t_file, *p_file;
typedef struct info_alloc {