move flex program sources into src/ directory

The *.[chly] sources are now in the src directory. This implies a
bunch of changes in Makefile.am and friends to account for the new
location. The .gitignore files are now more local to places where various object files and generated source files occur.

1 files changed, 219 insertions, 0 deletions

diff --git a/src/ecs.c b/src/ecs.c
new file mode 100644
index 0000000..e2abbe4
--- /dev/null
+++ b/src/ecs.c
@@ -0,0 +1,219 @@
+/* ecs - equivalence class routines */
+
+/*  Copyright (c) 1990 The Regents of the University of California. */
+/*  All rights reserved. */
+
+/*  This code is derived from software contributed to Berkeley by */
+/*  Vern Paxson. */
+
+/*  The United States Government has rights in this work pursuant */
+/*  to contract no. DE-AC03-76SF00098 between the United States */
+/*  Department of Energy and the University of California. */
+
+/* This file is part of flex */
+
+/*  Redistribution and use in source and binary forms, with or without */
+/*  modification, are permitted provided that the following conditions */
+/*  are met: */
+
+/*  1. Redistributions of source code must retain the above copyright */
+/*     notice, this list of conditions and the following disclaimer. */
+/*  2. Redistributions in binary form must reproduce the above copyright */
+/*     notice, this list of conditions and the following disclaimer in the */
+/*     documentation and/or other materials provided with the distribution. */
+
+/*  Neither the name of the University nor the names of its contributors */
+/*  may be used to endorse or promote products derived from this software */
+/*  without specific prior written permission. */
+
+/*  THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
+/*  IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
+/*  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
+/*  PURPOSE. */
+
+
+#include "flexdef.h"
+
+/* ccl2ecl - convert character classes to set of equivalence classes */
+
+void    ccl2ecl ()
+{
+	int     i, ich, newlen, cclp, ccls, cclmec;
+
+	for (i = 1; i <= lastccl; ++i) {
+		/* We loop through each character class, and for each character
+		 * in the class, add the character's equivalence class to the
+		 * new "character" class we are creating.  Thus when we are all
+		 * done, character classes will really consist of collections
+		 * of equivalence classes
+		 */
+
+		newlen = 0;
+		cclp = cclmap[i];
+
+		for (ccls = 0; ccls < ccllen[i]; ++ccls) {
+			ich = ccltbl[cclp + ccls];
+			cclmec = ecgroup[ich];
+
+			if (cclmec > 0) {
+				ccltbl[cclp + newlen] = cclmec;
+				++newlen;
+			}
+		}
+
+		ccllen[i] = newlen;
+	}
+}
+
+
+/* cre8ecs - associate equivalence class numbers with class members
+ *
+ * fwd is the forward linked-list of equivalence class members.  bck
+ * is the backward linked-list, and num is the number of class members.
+ *
+ * Returned is the number of classes.
+ */
+
+int     cre8ecs (fwd, bck, num)
+     int     fwd[], bck[], num;
+{
+	int     i, j, numcl;
+
+	numcl = 0;
+
+	/* Create equivalence class numbers.  From now on, ABS( bck(x) )
+	 * is the equivalence class number for object x.  If bck(x)
+	 * is positive, then x is the representative of its equivalence
+	 * class.
+	 */
+	for (i = 1; i <= num; ++i)
+		if (bck[i] == NIL) {
+			bck[i] = ++numcl;
+			for (j = fwd[i]; j != NIL; j = fwd[j])
+				bck[j] = -numcl;
+		}
+
+	return numcl;
+}
+
+
+/* mkeccl - update equivalence classes based on character class xtions
+ *
+ * synopsis
+ *    Char ccls[];
+ *    int lenccl, fwd[llsiz], bck[llsiz], llsiz, NUL_mapping;
+ *    void mkeccl( Char ccls[], int lenccl, int fwd[llsiz], int bck[llsiz],
+ *			int llsiz, int NUL_mapping );
+ *
+ * ccls contains the elements of the character class, lenccl is the
+ * number of elements in the ccl, fwd is the forward link-list of equivalent
+ * characters, bck is the backward link-list, and llsiz size of the link-list.
+ *
+ * NUL_mapping is the value which NUL (0) should be mapped to.
+ */
+
+void    mkeccl (ccls, lenccl, fwd, bck, llsiz, NUL_mapping)
+     Char    ccls[];
+     int     lenccl, fwd[], bck[], llsiz, NUL_mapping;
+{
+	int     cclp, oldec, newec;
+	int     cclm, i, j;
+	static unsigned char cclflags[CSIZE];	/* initialized to all '\0' */
+
+	/* Note that it doesn't matter whether or not the character class is
+	 * negated.  The same results will be obtained in either case.
+	 */
+
+	cclp = 0;
+
+	while (cclp < lenccl) {
+		cclm = ccls[cclp];
+
+		if (NUL_mapping && cclm == 0)
+			cclm = NUL_mapping;
+
+		oldec = bck[cclm];
+		newec = cclm;
+
+		j = cclp + 1;
+
+		for (i = fwd[cclm]; i != NIL && i <= llsiz; i = fwd[i]) {	/* look for the symbol in the character class */
+			for (; j < lenccl; ++j) {
+				register int ccl_char;
+
+				if (NUL_mapping && ccls[j] == 0)
+					ccl_char = NUL_mapping;
+				else
+					ccl_char = ccls[j];
+
+				if (ccl_char > i)
+					break;
+
+				if (ccl_char == i && !cclflags[j]) {
+					/* We found an old companion of cclm
+					 * in the ccl.  Link it into the new
+					 * equivalence class and flag it as
+					 * having been processed.
+					 */
+
+					bck[i] = newec;
+					fwd[newec] = i;
+					newec = i;
+					/* Set flag so we don't reprocess. */
+					cclflags[j] = 1;
+
+					/* Get next equivalence class member. */
+					/* continue 2 */
+					goto next_pt;
+				}
+			}
+
+			/* Symbol isn't in character class.  Put it in the old
+			 * equivalence class.
+			 */
+
+			bck[i] = oldec;
+
+			if (oldec != NIL)
+				fwd[oldec] = i;
+
+			oldec = i;
+
+		      next_pt:;
+		}
+
+		if (bck[cclm] != NIL || oldec != bck[cclm]) {
+			bck[cclm] = NIL;
+			fwd[oldec] = NIL;
+		}
+
+		fwd[newec] = NIL;
+
+		/* Find next ccl member to process. */
+
+		for (++cclp; cclflags[cclp] && cclp < lenccl; ++cclp) {
+			/* Reset "doesn't need processing" flag. */
+			cclflags[cclp] = 0;
+		}
+	}
+}
+
+
+/* mkechar - create equivalence class for single character */
+
+void    mkechar (tch, fwd, bck)
+     int     tch, fwd[], bck[];
+{
+	/* If until now the character has been a proper subset of
+	 * an equivalence class, break it away to create a new ec
+	 */
+
+	if (fwd[tch] != NIL)
+		bck[fwd[tch]] = bck[tch];
+
+	if (bck[tch] != NIL)
+		fwd[bck[tch]] = fwd[tch];
+
+	fwd[tch] = NIL;
+	bck[tch] = NIL;
+}