/* gpcheckmult.c 18/11/94.
*
* 6/8/98 large scale reorganisation to omit globals, etc.
* 5/2/98 change generators from type char to type `gen'.
* 26/9/96 - New option -wtlex (this was already in V1 of kbmag) to deal with
* the wtlex ordering case. This uses a different word-reduction
* and needs to read in the weights from the original file.
* For the moment this is not usable with the -cos option.
*
* 1/8/96 - output a file gpname.kbprog.exitcode containing a GAP statement
* giving the exit code - for use with GAP interface
*
* 15/3/96 changed syntax of -cos call to
* gpmakefsa -cos groupname [cosname]
* where cosname defaults to "cos".
*
* 26/2/96 added option -ow (output words).
* If it finds an error, it does not correct diff2, but outputs the
* a list containing the culprit words and the associated generators.
*
* 22/9/95 - added capability of doing the calculations for coset
* automatic groups - with the -cos option
* This program assumes that kbprog, gpwa, gpgenmult have already been
* run on the group G.
* The theory of this checking process for the general multiplier is as
* follows.
*
* For each generator g of G, let M_g be the associated multiplier automaton,
* and construct the fsa E_g, which accepts word w iff there exists a word x
* such that M_g accepts (w,x). E_g should equal the word-acceptor W for G.
* Construct (E_g' and W) to check this. It should have empty language. If not
* find words w that it accepts, reduce w*g, to x, say, and update the
* word-difference machine for G used to construct the multipliers, to make
* it accept the pair (w*g,x).
*
* In practice, the function fsa_checkmult does this check on the general
* multiplier for all g at the same time.
* Furthermore, it does not need to use the word-acceptor explicitly, since
* if w is not accepted by the word-acceptor, then all pairs (w,y)
* map to 0, and w is never considered.
*
* SYNOPSIS:
* gpcheckmult [-ip d/s[dr]] [-v] [-silent] [-l/-h] [-m maxeqns]
* [-ow] [-mwd maxwdiffs] [-cos] [-wtlex] groupname [cosname]
*
* If -cos is not set,
* input is from groupname.gpgenmult, and possibly groupname.diff2
* (the last only if it requires updating).
* If -cos is set,
* input is from groupname.cosname.gpgenmult, and possibly
* groupname.cosname.midiff2 (the last only if it requires updating).
*
* If no updating is required there is no output.
* Otherwise output is to groupname.diff2 or groupname.cosname.midiff2,
* unless -ow is set, in which case it is to groupname.(cosname.)wg.
*
* EXIT STATUS:
* This is 2 if groupname.(cosname.mi)diff2 requires updating, otherwise 0.
*
* OPTIONS:
* -ip d/s[dr] input in dense or sparse format - dense is default
* -v verbose
* -silent no diagnostics
* -l/-h large/huge hash-tables (for big examples)
* -m maxeqns Abort after finding maxeqns offending words w (see above)
* default is MAXNEWEQNS
* -mwd maxwdiffs
* At most maxwdiffs word-differences possible.
* -ow If the general multiplier turns out to be incorrect, do
* not correct the diff2 machine, but simply output the
* culprit words. More precisely output a file to
* groupname.(cosname.)wg (words and generators), containing a
* list declaration of the form ???.wg := [...], where
* each term in the list is a 2-element list containing a word
* w and a generator a, such that w is not accpeted as a left
* hand side by the multiplier for generator a.
* -cos Do the calculation for coset automatic groups (by setting
* global variable cosets to be TRUE).
* -wtlex Use wtlex ordering of words. This only makes a difference if
* the diff2 machine is updated. Not usable with -cos option.
*/
#include <stdio.h>
#include "defs.h"
#include "fsa.h"
#include "rws.h"
#include "definitions.h"
#define MAXNEWEQNS 512
#define MAXRWSEQNS 1024
#define MAXWDIFFS 4096
#define PREFMARGIN 1024
#define MAXREDUCELEN 4096
static FILE *rfile, *wfile;
static void badusage(void);
int (*reduce_word)(gen *w, reduction_struct *rs_rws);
int main(int argc, char *argv[])
{
int arg, i, ct, *inv, old_ndiff, maxneweqns, numeqns, ngens, maxwdiffs;
fsa diff2, genmult;
char gpname[100], cosgpname[100], inf1[100], inf2[100], inf3[100], outf[100],
outfwg[100], outfec[100], fsaname[100];
fsa *wd_fsa; /* This is for doing word-reductions in the case that we
* correct the diff2 machine
*/
fsa wa; /* The word-acceptor in the wtlex case */
int weight[MAXGEN + 1]; /* The weights of the generators in the wtlex case */
gen testword[MAXREDUCELEN]; /* for word reduction */
char **names; /* generator names in case we need to output words */
reduction_equation *eqnptr;
reduction_struct rs_wd;
storage_type ip_store = DENSE;
int dr = 0;
boolean seengpname, seencosname;
boolean cosets = FALSE;
boolean wtlex = FALSE;
rewriting_system rws;
boolean outputwords = FALSE;
int separator = 0;
setbuf(stdout, (char *)0);
setbuf(stderr, (char *)0);
rws.maxeqns = MAXRWSEQNS;
maxneweqns = MAXNEWEQNS;
maxwdiffs = MAXWDIFFS;
inf1[0] = '\0';
inf2[0] = '\0';
outf[0] = '\0';
arg = 1;
seengpname = seencosname = FALSE;
while (argc > arg) {
if (strcmp(argv[arg], "-ip") == 0) {
arg++;
if (arg >= argc)
badusage();
if (strcmp(argv[arg], "d") == 0)
ip_store = DENSE;
else if (argv[arg][0] == 's') {
ip_store = SPARSE;
if (stringlen(argv[arg]) > 1)
dr = atoi(argv[arg] + 1);
}
else
badusage();
}
else if (strcmp(argv[arg], "-silent") == 0)
kbm_print_level = 0;
else if (strcmp(argv[arg], "-v") == 0)
kbm_print_level = 2;
else if (strcmp(argv[arg], "-vv") == 0)
kbm_print_level = 3;
else if (strcmp(argv[arg], "-l") == 0)
kbm_large = TRUE;
else if (strcmp(argv[arg], "-h") == 0)
kbm_huge = TRUE;
else if (strcmp(argv[arg], "-ow") == 0)
outputwords = TRUE;
else if (strncmp(argv[arg], "-cos", 4) == 0)
cosets = TRUE;
else if (strcmp(argv[arg], "-m") == 0) {
arg++;
if (arg >= argc)
badusage();
maxneweqns = atoi(argv[arg]);
}
else if (strcmp(argv[arg], "-mwd") == 0) {
arg++;
if (arg >= argc)
badusage();
maxwdiffs = atoi(argv[arg]);
}
else if (strcmp(argv[arg], "-wtlex") == 0)
wtlex = TRUE;
else if (argv[arg][0] == '-')
badusage();
else if (!seengpname) {
seengpname = TRUE;
strcpy(gpname, argv[arg]);
}
else if (!seencosname) {
seencosname = TRUE;
sprintf(cosgpname, "%s.%s", gpname, argv[arg]);
}
else
badusage();
arg++;
}
if (!seengpname)
badusage();
if (cosets && wtlex) {
fprintf(stderr,
"Sorry: -cos and -wtlex options cannot be used together.\n");
badusage();
}
if (cosets && !seencosname)
sprintf(cosgpname, "%s.cos", gpname);
if (cosets)
strcpy(inf1, cosgpname);
else
strcpy(inf1, gpname);
strcpy(inf2, inf1);
strcat(inf1, ".gm");
if (cosets)
sprintf(outfec, "%s.cm.ec", cosgpname);
else
sprintf(outfec, "%s.cm.ec", gpname);
if ((rfile = fopen(inf1, "r")) == 0) {
fprintf(stderr, "Cannot open file %s.\n", inf1);
exit(1);
}
fsa_read(rfile, &genmult, ip_store, dr, 0, TRUE, fsaname);
fclose(rfile);
tmalloc(eqnptr, reduction_equation, maxneweqns) if (cosets) separator =
rs_wd.separator = genmult.alphabet->base->size + 1;
if ((numeqns = fsa_checkmult(&genmult, eqnptr, maxneweqns, cosets,
separator)) > 0) {
/* A multiplier was not valid, so groupname.(mi)diff2 will need updating. */
if (outputwords) {
/* We do not update gpname.diff2, but output the offending words. */
if (cosets)
strcpy(outfwg, cosgpname);
else
strcpy(outfwg, gpname);
strcat(outfwg, ".wg");
wfile = fopen(outfwg, "w");
base_prefix(fsaname);
fprintf(wfile, "%s.wg := [\n", fsaname);
names = genmult.alphabet->base->names;
for (i = 0; i < numeqns; i++) {
strcpy(kbm_buffer, " [");
if (cosets)
add_word_to_buffer(wfile, eqnptr[i].lhs + 1, names);
else
add_word_to_buffer(wfile, eqnptr[i].lhs, names);
strcat(kbm_buffer, ",");
add_word_to_buffer(wfile, eqnptr[i].rhs, names);
if (i < numeqns - 1)
strcat(kbm_buffer, "],");
else
strcat(kbm_buffer, "]");
fprintf(wfile, "%s\n", kbm_buffer);
}
fprintf(wfile, "];\n");
fclose(wfile);
fsa_clear(&genmult);
for (i = 0; i < numeqns; i++) {
tfree(eqnptr[i].lhs);
tfree(eqnptr[i].rhs);
}
tfree(eqnptr);
wfile = fopen(outfec, "w");
fprintf(wfile, "_ExitCode := 2;\n");
fclose(wfile);
exit(2);
}
fsa_clear(&genmult);
if (cosets)
strcat(inf2, ".midiff2");
else
strcat(inf2, ".diff2");
strcpy(outf, inf2);
if (kbm_print_level > 1)
printf(" #Altering wd-machine to make it accept new equations.\n");
if ((rfile = fopen(inf2, "r")) == 0) {
fprintf(stderr, "Cannot open file %s.\n", inf2);
exit(1);
}
/* We read groupname.(mi)diff2 into diff2, and then copy it into
* wd_fsa. The copy is used for reducing words - Not surprisingly,
* we get problems if we try to alter it while using it at
* the same time!
*/
fsa_read(rfile, &diff2, DENSE, 0, maxwdiffs, TRUE, fsaname);
fclose(rfile);
tmalloc(wd_fsa, fsa, 1);
fsa_copy(wd_fsa, &diff2);
if (wtlex) { /* we have to read in the weights from the group file */
if ((rfile = fopen(gpname, "r")) == 0) {
fprintf(stderr, "Cannot open file %s.\n", gpname);
exit(1);
}
read_kbinput_simple(rfile, TRUE, &rws);
fclose(rfile);
/* we only need the weights, which we can simply copy */
for (i = 1; i <= rws.num_gens; i++)
weight[i] = rws.weight[i];
weight[rws.num_gens + 1] = 0; /* padding symbol */
rws_clear(&rws);
strcpy(inf3, gpname);
strcat(inf3, ".wa");
if ((rfile = fopen(inf3, "r")) == 0) {
fprintf(stderr, "Cannot open file %s.\n", inf3);
exit(1);
}
fsa_read(rfile, &wa, DENSE, 0, 0, TRUE, fsaname);
fclose(rfile);
}
rs_wd.wd_fsa = wd_fsa;
reduce_word =
cosets ? diff_reduce_cos : wtlex ? diff_reduce_wl : diff_reduce;
if (fsa_table_dptr_init(wd_fsa) == -1)
return -1;
if (fsa_table_dptr_init(&diff2) == -1)
return -1;
if (cosets) {
tmalloc(diff2.is_initial, boolean, maxwdiffs + 1);
for (i = 1; i <= maxwdiffs; i++)
diff2.is_initial[i] = FALSE;
for (i = 1; i <= diff2.num_initial; i++)
diff2.is_initial[diff2.initial[i]] = TRUE;
}
else if (wtlex) {
rs_wd.wa = &wa;
rs_wd.weight = weight;
rs_wd.maxreducelen = MAXREDUCELEN;
}
/* We need to know the inverses of generators - let's just work them out! */
ngens = diff2.alphabet->base->size;
if (calculate_inverses(&inv, ngens, &rs_wd) == -1)
return -1;
old_ndiff = diff2.states->size;
/* Now add the new equations
* The right hand side of the equation to be added will be the reduction of
* the lhs times the generator which is currently in the rhs.
*/
for (i = 0; i < numeqns; i++) {
genstrcat(eqnptr[i].lhs, eqnptr[i].rhs);
tfree(eqnptr[i].rhs);
genstrcpy(testword, eqnptr[i].lhs);
reduce_word(testword, &rs_wd);
tmalloc(eqnptr[i].rhs, gen, genstrlen(testword) + 1);
genstrcpy(eqnptr[i].rhs, testword);
if (cosets) {
if (add_wd_fsa_cos(&diff2, eqnptr + i, inv, TRUE, &rs_wd) == -1)
exit(1);
}
else if (add_wd_fsa(&diff2, eqnptr + i, inv, TRUE, &rs_wd) == -1)
exit(1);
}
if (cosets) {
tfree(diff2.initial);
tmalloc(diff2.initial, int, diff2.num_initial + 1);
ct = 0;
for (i = 1; i <= diff2.states->size; i++)
if (diff2.is_initial[i])
diff2.initial[++ct] = i;
tfree(diff2.is_initial);
make_full_wd_fsa_cos(&diff2, inv, old_ndiff + 1, &rs_wd);
}
else
make_full_wd_fsa(&diff2, inv, old_ndiff + 1, &rs_wd);
if (kbm_print_level > 1)
printf(" #Word-difference machine now has %d states.\n",
diff2.states->size);
wfile = fopen(inf2, "w");
fsa_print(wfile, &diff2, fsaname);
fclose(wfile);
tfree(inv);
fsa_clear(wd_fsa);
fsa_clear(&diff2);
tfree(wd_fsa);
if (wtlex)
fsa_clear(&wa);
for (i = 0; i < numeqns; i++) {
tfree(eqnptr[i].lhs);
tfree(eqnptr[i].rhs);
}
tfree(eqnptr);
wfile = fopen(outfec, "w");
fprintf(wfile, "_ExitCode := 2;\n");
fclose(wfile);
exit(2);
}
else if (numeqns < 0)
exit(1);
if (kbm_print_level > 0)
printf("#Validity test on general multiplier succeeded.\n");
fsa_clear(&genmult);
tfree(eqnptr);
wfile = fopen(outfec, "w");
fprintf(wfile, "_ExitCode := 0;\n");
fclose(wfile);
exit(0);
}
void badusage(void)
{
fprintf(
stderr,
"Usage: gpcheckmult [-ip d/s[dr]] [-silent] [-v] [-l/-h] [-m maxeqns]\n");
fprintf(stderr,
"\t\t[-ow] [-mwd maxwdiffs] [-cos] [-wtlex] groupname [cosname]\n");
exit(1);
}
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