Initial revision

1 files changed, 242 insertions, 0 deletions

diff --git a/regex/debug.c b/regex/debug.c
new file mode 100644
index 0000000..99ce7da
--- /dev/null
+++ b/regex/debug.c
@@ -0,0 +1,242 @@
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <regex.h>
+
+#include "utils.h"
+#include "regex2.h"
+#include "debug.ih"
+
+/*
+ - regprint - print a regexp for debugging
+ == void regprint(regex_t *r, FILE *d);
+ */
+void
+regprint(r, d)
+regex_t *r;
+FILE *d;
+{
+	register struct re_guts *g = r->re_g;
+	register int i;
+	register int c;
+	register int last;
+	int nincat[NC];
+
+	fprintf(d, "%ld states, %d categories", (long)g->nstates,
+							g->ncategories);
+	fprintf(d, ", first %ld last %ld", (long)g->firststate,
+						(long)g->laststate);
+	if (g->iflags&USEBOL)
+		fprintf(d, ", USEBOL");
+	if (g->iflags&USEEOL)
+		fprintf(d, ", USEEOL");
+	if (g->iflags&BAD)
+		fprintf(d, ", BAD");
+	if (g->nsub > 0)
+		fprintf(d, ", nsub=%ld", (long)g->nsub);
+	if (g->must != NULL)
+		fprintf(d, ", must(%ld) `%*s'", (long)g->mlen, (int)g->mlen,
+								g->must);
+	if (g->backrefs)
+		fprintf(d, ", backrefs");
+	if (g->nplus > 0)
+		fprintf(d, ", nplus %ld", (long)g->nplus);
+	fprintf(d, "\n");
+	s_print(g, d);
+	for (i = 0; i < g->ncategories; i++) {
+		nincat[i] = 0;
+		for (c = CHAR_MIN; c <= CHAR_MAX; c++)
+			if (g->categories[c] == i)
+				nincat[i]++;
+	}
+	fprintf(d, "cc0#%d", nincat[0]);
+	for (i = 1; i < g->ncategories; i++)
+		if (nincat[i] == 1) {
+			for (c = CHAR_MIN; c <= CHAR_MAX; c++)
+				if (g->categories[c] == i)
+					break;
+			fprintf(d, ", %d=%s", i, regchar(c));
+		}
+	fprintf(d, "\n");
+	for (i = 1; i < g->ncategories; i++)
+		if (nincat[i] != 1) {
+			fprintf(d, "cc%d\t", i);
+			last = -1;
+			for (c = CHAR_MIN; c <= CHAR_MAX+1; c++)	/* +1 does flush */
+				if (c <= CHAR_MAX && g->categories[c] == i) {
+					if (last < 0) {
+						fprintf(d, "%s", regchar(c));
+						last = c;
+					}
+				} else {
+					if (last >= 0) {
+						if (last != c-1)
+							fprintf(d, "-%s",
+								regchar(c-1));
+						last = -1;
+					}
+				}
+			fprintf(d, "\n");
+		}
+}
+
+/*
+ - s_print - print the strip for debugging
+ == static void s_print(register struct re_guts *g, FILE *d);
+ */
+static void
+s_print(g, d)
+register struct re_guts *g;
+FILE *d;
+{
+	register sop *s;
+	register cset *cs;
+	register int i;
+	register int done = 0;
+	register sop opnd;
+	register int col = 0;
+	register int last;
+	register sopno offset = 2;
+#	define	GAP()	{	if (offset % 5 == 0) { \
+					if (col > 40) { \
+						fprintf(d, "\n\t"); \
+						col = 0; \
+					} else { \
+						fprintf(d, " "); \
+						col++; \
+					} \
+				} else \
+					col++; \
+				offset++; \
+			}
+
+	if (OP(g->strip[0]) != OEND)
+		fprintf(d, "missing initial OEND!\n");
+	for (s = &g->strip[1]; !done; s++) {
+		opnd = OPND(*s);
+		switch (OP(*s)) {
+		case OEND:
+			fprintf(d, "\n");
+			done = 1;
+			break;
+		case OCHAR:
+			if (strchr("\\|()^$.[+*?{}!<> ", (char)opnd) != NULL)
+				fprintf(d, "\\%c", (char)opnd);
+			else
+				fprintf(d, "%s", regchar((char)opnd));
+			break;
+		case OBOL:
+			fprintf(d, "^");
+			break;
+		case OEOL:
+			fprintf(d, "$");
+			break;
+		case OBOW:
+			fprintf(d, "\\{");
+			break;
+		case OEOW:
+			fprintf(d, "\\}");
+			break;
+		case OANY:
+			fprintf(d, ".");
+			break;
+		case OANYOF:
+			fprintf(d, "[(%ld)", (long)opnd);
+			cs = &g->sets[opnd];
+			last = -1;
+			for (i = 0; i < g->csetsize+1; i++)	/* +1 flushes */
+				if (CHIN(cs, i) && i < g->csetsize) {
+					if (last < 0) {
+						fprintf(d, "%s", regchar(i));
+						last = i;
+					}
+				} else {
+					if (last >= 0) {
+						if (last != i-1)
+							fprintf(d, "-%s",
+								regchar(i-1));
+						last = -1;
+					}
+				}
+			fprintf(d, "]");
+			break;
+		case OBACK_:
+			fprintf(d, "(\\<%ld>", (long)opnd);
+			break;
+		case O_BACK:
+			fprintf(d, "<%ld>\\)", (long)opnd);
+			break;
+		case OPLUS_:
+			fprintf(d, "(+");
+			if (OP(*(s+opnd)) != O_PLUS)
+				fprintf(d, "<%ld>", (long)opnd);
+			break;
+		case O_PLUS:
+			if (OP(*(s-opnd)) != OPLUS_)
+				fprintf(d, "<%ld>", (long)opnd);
+			fprintf(d, "+)");
+			break;
+		case OQUEST_:
+			fprintf(d, "(?");
+			if (OP(*(s+opnd)) != O_QUEST)
+				fprintf(d, "<%ld>", (long)opnd);
+			break;
+		case O_QUEST:
+			if (OP(*(s-opnd)) != OQUEST_)
+				fprintf(d, "<%ld>", (long)opnd);
+			fprintf(d, "?)");
+			break;
+		case OLPAREN:
+			fprintf(d, "((<%ld>", (long)opnd);
+			break;
+		case ORPAREN:
+			fprintf(d, "<%ld>))", (long)opnd);
+			break;
+		case OCH_:
+			fprintf(d, "<");
+			if (OP(*(s+opnd)) != OOR2)
+				fprintf(d, "<%ld>", (long)opnd);
+			break;
+		case OOR1:
+			if (OP(*(s-opnd)) != OOR1 && OP(*(s-opnd)) != OCH_)
+				fprintf(d, "<%ld>", (long)opnd);
+			fprintf(d, "|");
+			break;
+		case OOR2:
+			fprintf(d, "|");
+			if (OP(*(s+opnd)) != OOR2 && OP(*(s+opnd)) != O_CH)
+				fprintf(d, "<%ld>", (long)opnd);
+			break;
+		case O_CH:
+			if (OP(*(s-opnd)) != OOR1)
+				fprintf(d, "<%ld>", (long)opnd);
+			fprintf(d, ">");
+			break;
+		default:
+			fprintf(d, "!%d(%d)!", OP(*s), opnd);
+			break;
+		}
+		if (!done)
+			GAP();
+	}
+}
+
+/*
+ - regchar - make a character printable
+ == static char *regchar(int ch);
+ */
+static char *			/* -> representation */
+regchar(ch)
+int ch;
+{
+	static char buf[10];
+
+	if (isprint(ch) || ch == ' ')
+		sprintf(buf, "%c", ch);
+	else
+		sprintf(buf, "\\%o", ch);
+	return(buf);
+}