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authorMichael Zucci <zucchi@src.gnome.org>2000-02-14 10:00:22 +0800
committerMichael Zucci <zucchi@src.gnome.org>2000-02-14 10:00:22 +0800
commitadd8821e99b4ea1b574ed469018ae224a542e6ae (patch)
tree3e9e02c153fb7300707a26a132ee66c9177d2369 /libibex
parente4bbdf696cc2f23e9b1fc288d37a44eb27d9426d (diff)
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Initial revision
svn path=/trunk/; revision=1768
Diffstat (limited to 'libibex')
-rw-r--r--libibex/COPYING340
-rw-r--r--libibex/ChangeLog4
-rw-r--r--libibex/Makefile26
-rw-r--r--libibex/TODO61
-rw-r--r--libibex/file.c383
-rw-r--r--libibex/find.c100
-rw-r--r--libibex/ibex.h74
-rw-r--r--libibex/ibex_internal.h26
-rw-r--r--libibex/index.c101
-rw-r--r--libibex/lookup.c74
-rw-r--r--libibex/mkindex.c75
-rw-r--r--libibex/words.c263
12 files changed, 1527 insertions, 0 deletions
diff --git a/libibex/COPYING b/libibex/COPYING
new file mode 100644
index 0000000000..d60c31a97a
--- /dev/null
+++ b/libibex/COPYING
@@ -0,0 +1,340 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
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+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
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+
+ Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
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+patent must be licensed for everyone's free use or not licensed at all.
+
+ The precise terms and conditions for copying, distribution and
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+
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
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+Activities other than copying, distribution and modification are not
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+You may charge a fee for the physical act of transferring a copy, and
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+ 8. If the distribution and/or use of the Program is restricted in
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+original copyright holder who places the Program under this License
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+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
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+address new problems or concerns.
+
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+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
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+Foundation.
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+ 10. If you wish to incorporate parts of the Program into other free
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+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
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+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/libibex/ChangeLog b/libibex/ChangeLog
new file mode 100644
index 0000000000..47d4caeed6
--- /dev/null
+++ b/libibex/ChangeLog
@@ -0,0 +1,4 @@
+2000-02-13 NotZed <notzed@zedzone.helixcode.com>
+
+ * Added ChangeLog file.
+
diff --git a/libibex/Makefile b/libibex/Makefile
new file mode 100644
index 0000000000..eec7e1b302
--- /dev/null
+++ b/libibex/Makefile
@@ -0,0 +1,26 @@
+OBJS=file.o index.o find.o words.o
+MKINDEXOBJS=mkindex.o
+LOOKUPOBJS=lookup.o
+
+CFLAGS=${PROF} -g -Wall -Wstrict-prototypes -Wmissing-prototypes `glib-config --cflags` `unicode-config --cflags`
+LDFLAGS=${PROF}
+
+all: libibex.a mkindex lookup
+
+libibex.a: ${OBJS}
+ ar cru $@ ${OBJS}
+ @test -x /usr/bin/ranlib && ranlib $@
+
+mkindex: ${MKINDEXOBJS} libibex.a
+ ${CC} ${LDFLAGS} -o mkindex ${MKINDEXOBJS} libibex.a \
+ `glib-config --libs` `unicode-config --libs`
+
+lookup: ${LOOKUPOBJS} libibex.a
+ ${CC} ${LDFLAGS} -o lookup ${LOOKUPOBJS} libibex.a \
+ `glib-config --libs` `unicode-config --libs`
+
+clean:
+ rm -f ${OBJS} libibex.a
+ rm -f ${MKINDEXOBJS} mkindex
+ rm -f ${LOOKUPOBJS} lookup
+ rm -f *.core *~ INDEX \ No newline at end of file
diff --git a/libibex/TODO b/libibex/TODO
new file mode 100644
index 0000000000..a087c8d1f3
--- /dev/null
+++ b/libibex/TODO
@@ -0,0 +1,61 @@
+Stability
+---------
+* ibex_open should never crash, and should never return NULL without
+errno being set. Should check for errors when reading.
+
+
+Performance
+-----------
+* Profiling, keep thinking about data structures, etc.
+
+* Check memory usage
+
+* See if writing the "inverse image" of long ref streams helps
+compression without hurting performance now. (ie, if a word appears in
+more than half of the files, write out the list of files it _doesn't_
+appear in). (I tried this before, and it wasn't working well, but the
+file format and data structures have changed a lot.)
+
+* We could save a noticeable chunk of time if normalize_word computed
+the hash of the word and then we could pass that into
+g_hash_table_insert somehow.
+
+* Make a copy of the buffer to be indexed (or provide interface for
+caller to say ibex can munge the provided data) and then use that
+rather than constantly copying things. ?
+
+
+Functionality
+-------------
+* ibex file locking
+
+* specify file mode in ibex_open
+
+* ibex_find* need to normalize the search words... should this be done
+by the caller or by ibex_find?
+
+* Needs to be some way to do a secondary search after getting results
+back from ibex_find* (ie, for "foo near bar"). This either has to be
+done by ibex, or requires us to export the normalize interface.
+
+* Does there need to be an ibex_find_any, or is that easy enough for the
+caller to do?
+
+* utf8_trans needs to cover at least two more code pages. This is
+tricky because it's not clear whether some of the letters there should
+be translated to ASCII or left as UTF8. This requires some
+investigation.
+
+* ibex_index_* need to ignore HTML tags.
+ NAME = [A-Za-z][A-Za-z0-9.-]*
+ </?{NAME}(\s*{NAME}(\s*=\s*({NAME}|"[^"]*"|'[^']*')))*>
+ <!(--([^-]*|-[^-])--\s*)*>
+
+ ugh. ok, simplifying, we get:
+ <[^!](([^"'>]*("[^"]*"|'[^']*'))*> or
+ <!(--([^-]*|-[^-])--\s*)*>
+
+ which is still not simple. sigh.
+
+* ibex_index_* need to recognize and ignore "non-text". Particularly
+BinHex and uuencoding.
diff --git a/libibex/file.c b/libibex/file.c
new file mode 100644
index 0000000000..e9eaab7f51
--- /dev/null
+++ b/libibex/file.c
@@ -0,0 +1,383 @@
+/*
+ Copyright 2000 Helix Code Inc.
+*/
+
+/* file.c: index file read/write ops */
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ibex_internal.h"
+
+static unsigned long read_number(FILE *f);
+static void write_number(FILE *f, unsigned long n);
+static char *get_compressed_word(FILE *f, char **lastword);
+
+static gint free_file(gpointer key, gpointer value, gpointer data);
+static void free_word(gpointer key, gpointer value, gpointer data);
+
+/* The file format is:
+ *
+ * version string (currently "ibex1")
+ * file count
+ * list of compressed filenames, separated by \0
+ * word count
+ * list of compressed words, each followed by \0, a count, and that
+ * many references.
+ *
+ * All numbers are stored 7-bit big-endian, with the high bit telling
+ * whether or not the number continues to the next byte.
+ *
+ * compressed text consists of a byte telling how many characters the
+ * line has in common with the line before it, followed by the rest of
+ * the string. Obviously this only really works if the lists are sorted.
+ */
+ibex *
+ibex_open(char *file, gboolean create)
+{
+ ibex *ib;
+ FILE *f;
+ char vbuf[sizeof(IBEX_VERSION) - 1];
+ char *word, *lastword;
+ unsigned long nfiles, nwords, nrefs, ref;
+ ibex_file **ibfs = NULL;
+ int i;
+ GPtrArray *refs;
+
+ f = fopen(file, "r");
+ if (!f && (errno != ENOENT || !create))
+ {
+ if (errno == 0)
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ ib = g_malloc(sizeof(ibex));
+ ib->dirty = FALSE;
+ ib->path = g_strdup(file);
+ ib->files = g_tree_new(strcmp);
+ ib->words = g_hash_table_new(g_str_hash, g_str_equal);
+ ib->oldfiles = g_ptr_array_new();
+
+ if (!f)
+ return ib;
+
+ /* Check version. */
+ if (fread(vbuf, 1, sizeof(vbuf), f) != sizeof(vbuf))
+ {
+ if (feof(f))
+ errno = EINVAL;
+ goto errout;
+ }
+ if (strncmp(vbuf, IBEX_VERSION, sizeof(vbuf) != 0))
+ {
+ errno = EINVAL;
+ goto errout;
+ }
+
+ /* Read list of files. */
+ nfiles = read_number(f);
+ ibfs = g_malloc(nfiles * sizeof(ibex_file *));
+ lastword = NULL;
+ for (i = 0; i < nfiles; i++)
+ {
+ ibfs[i] = g_malloc(sizeof(ibex_file));
+ ibfs[i]->name = get_compressed_word(f, &lastword);
+ if (!ibfs[i]->name)
+ goto errout;
+ ibfs[i]->index = 0;
+ g_tree_insert(ib->files, ibfs[i]->name, ibfs[i]);
+ }
+
+ /* Read list of words. */
+ nwords = read_number(f);
+ lastword = NULL;
+ for (i = 0; i < nwords; i++)
+ {
+ word = get_compressed_word(f, &lastword);
+ if (!word)
+ goto errout;
+
+ nrefs = read_number(f);
+ refs = g_ptr_array_new();
+ g_ptr_array_set_size(refs, nrefs);
+ while (nrefs--)
+ {
+ ref = read_number(f);
+ if (ref >= nfiles)
+ goto errout;
+ refs->pdata[nrefs] = ibfs[ref];
+ }
+
+ g_hash_table_insert(ib->words, word, refs);
+ }
+
+ g_free(ibfs);
+ fclose(f);
+ return ib;
+
+errout:
+ fclose(f);
+ g_tree_traverse(ib->files, free_file, G_IN_ORDER, NULL);
+ g_tree_destroy(ib->files);
+ g_hash_table_foreach(ib->words, free_word, NULL);
+ g_hash_table_destroy(ib->words);
+ g_ptr_array_free(ib->oldfiles, TRUE);
+ if (ibfs)
+ g_free(ibfs);
+ g_free(ib->path);
+ g_free(ib);
+
+ return NULL;
+}
+
+struct ibex_write_data {
+ unsigned long index;
+ FILE *f;
+ char *lastname;
+};
+
+static int
+get_prefix(struct ibex_write_data *iwd, char *name)
+{
+ int i = 0;
+ if (iwd->lastname)
+ {
+ while (!strncmp(iwd->lastname, name, i + 1))
+ i++;
+ }
+ iwd->lastname = name;
+ return i;
+}
+
+static gint
+write_file(gpointer key, gpointer value, gpointer data)
+{
+ char *file = key;
+ ibex_file *ibf = value;
+ struct ibex_write_data *iwd = data;
+ int prefix;
+
+ ibf->index = iwd->index++;
+ prefix = get_prefix(iwd, file);
+ fprintf(iwd->f, "%c%s", prefix, file + prefix);
+ fputc(0, iwd->f);
+ return FALSE;
+}
+
+static void
+store_word(gpointer key, gpointer value, gpointer data)
+{
+ GTree *wtree = data;
+
+ g_tree_insert(wtree, key, value);
+}
+
+static gint
+write_word(gpointer key, gpointer value, gpointer data)
+{
+ char *word = key;
+ GPtrArray *refs = value;
+ struct ibex_write_data *iwd = data;
+ ibex_file *ibf;
+ int i, ind, prefix;
+
+ for (i = ind = 0; i < refs->len; i++)
+ {
+ ibf = g_ptr_array_index(refs, i);
+ if (ibf->index == -1)
+ {
+ g_ptr_array_remove_index_fast(refs, i);
+ i--;
+ }
+ else
+ ind++;
+ }
+
+ if (ind != 0)
+ {
+ prefix = get_prefix(iwd, word);
+ fprintf(iwd->f, "%c%s", prefix, word + prefix);
+ fputc(0, iwd->f);
+
+ write_number(iwd->f, ind);
+
+ for (i = 0; i < refs->len; i++)
+ {
+ ibf = g_ptr_array_index(refs, i);
+ write_number(iwd->f, ibf->index);
+ }
+ }
+ return FALSE;
+}
+
+int
+ibex_write(ibex *ib)
+{
+ struct ibex_write_data iwd;
+ GTree *wtree;
+ char *tmpfile;
+
+ tmpfile = g_strdup_printf("%s~", ib->path);
+ iwd.f = fopen(tmpfile, "w");
+ if (!iwd.f)
+ {
+ if (errno == 0)
+ errno = ENOMEM;
+ g_free(tmpfile);
+ return -1;
+ }
+
+ fputs(IBEX_VERSION, iwd.f);
+ if (ferror(iwd.f))
+ goto lose;
+
+ iwd.index = 0;
+ iwd.lastname = NULL;
+ write_number(iwd.f, g_tree_nnodes(ib->files));
+ if (ferror(iwd.f))
+ goto lose;
+ g_tree_traverse(ib->files, write_file, G_IN_ORDER, &iwd);
+ if (ferror(iwd.f))
+ goto lose;
+
+ iwd.lastname = NULL;
+ write_number(iwd.f, g_hash_table_size(ib->words));
+ if (ferror(iwd.f))
+ goto lose;
+ wtree = g_tree_new(strcmp);
+ g_hash_table_foreach(ib->words, store_word, wtree);
+ g_tree_traverse(wtree, write_word, G_IN_ORDER, &iwd);
+ g_tree_destroy(wtree);
+ if (ferror(iwd.f))
+ goto lose;
+
+ if (fclose(iwd.f) == 0 && rename(tmpfile, ib->path) == 0)
+ {
+ g_free(tmpfile);
+ ib->dirty = FALSE;
+ return 0;
+ }
+
+lose:
+ unlink(tmpfile);
+ g_free(tmpfile);
+ return -1;
+}
+
+int
+ibex_close(ibex *ib)
+{
+ ibex_file *ibf;
+
+ if (ib->dirty && ibex_write(ib) == -1)
+ return -1;
+
+ g_tree_traverse(ib->files, free_file, G_IN_ORDER, NULL);
+ g_tree_destroy(ib->files);
+ g_hash_table_foreach(ib->words, free_word, NULL);
+ g_hash_table_destroy(ib->words);
+
+ while (ib->oldfiles->len)
+ {
+ ibf = g_ptr_array_remove_index(ib->oldfiles, 0);
+ g_free(ibf->name);
+ g_free(ibf);
+ }
+ g_ptr_array_free(ib->oldfiles, TRUE);
+ g_free(ib->path);
+ g_free(ib);
+
+ return 0;
+}
+
+static gint
+free_file(gpointer key, gpointer value, gpointer data)
+{
+ ibex_file *ibf = value;
+
+ g_free(ibf->name);
+ g_free(ibf);
+ return FALSE;
+}
+
+static void
+free_word(gpointer key, gpointer value, gpointer data)
+{
+ g_free(key);
+ g_ptr_array_free(value, TRUE);
+}
+
+static char *
+get_compressed_word(FILE *f, char **lastword)
+{
+ char *buf, *p;
+ int c, size;
+
+ c = getc(f);
+ if (c == EOF)
+ return NULL;
+
+ size = c + 10;
+ buf = g_malloc(size);
+ if (*lastword)
+ strncpy(buf, *lastword, c);
+ p = buf + c;
+ do
+ {
+ c = getc(f);
+ if (c == EOF)
+ return NULL;
+ if (p == buf + size)
+ {
+ buf = g_realloc(buf, size + 10);
+ p = buf + size;
+ size += 10;
+ }
+ *p++ = c;
+ }
+ while (c != 0);
+
+ *lastword = buf;
+ return buf;
+}
+
+static void
+write_number(FILE *f, unsigned long number)
+{
+ int i, flag = 0;
+ char buf[4];
+
+ i = 4;
+ do
+ {
+ buf[--i] = (number & 0x7F) | flag;
+ number = number >> 7;
+ flag = 0x80;
+ }
+ while (number != 0);
+
+ fwrite(buf + i, 1, 4 - i, f);
+}
+
+static unsigned long
+read_number(FILE *f)
+{
+ int byte;
+ unsigned long num;
+
+ num = 0;
+ do
+ {
+ byte = getc(f);
+ num = num << 7 | (byte & 0x7F);
+ }
+ while (byte & 0x80);
+
+ return num;
+}
+
diff --git a/libibex/find.c b/libibex/find.c
new file mode 100644
index 0000000000..0937331a83
--- /dev/null
+++ b/libibex/find.c
@@ -0,0 +1,100 @@
+/*
+ Copyright 2000 Helix Code Inc.
+*/
+
+/* find.c: index file searching ops */
+
+#include <string.h>
+
+#include "ibex_internal.h"
+
+GPtrArray *
+ibex_find(ibex *ib, char *word)
+{
+ GPtrArray *refs, *ret;
+ ibex_file *ibf;
+ int i;
+
+ ret = g_ptr_array_new();
+ refs = g_hash_table_lookup(ib->words, word);
+ if (refs)
+ {
+ for (i = 0; i < refs->len; i++)
+ {
+ ibf = g_ptr_array_index(refs, i);
+ g_ptr_array_add(ret, ibf->name);
+ }
+ }
+ return ret;
+}
+
+static gint
+build_array(gpointer key, gpointer value, gpointer data)
+{
+ char *name = key;
+ unsigned int count = GPOINTER_TO_UINT(value);
+ GPtrArray *ret = data;
+
+ if (count == 1)
+ g_ptr_array_add(ret, name);
+ return FALSE;
+}
+
+GPtrArray *
+ibex_find_all(ibex *ib, GPtrArray *words)
+{
+ GTree *work;
+ GPtrArray *wrefs, *ret;
+ int i, j, count;
+ char *word;
+ ibex_file *ibf;
+
+ if (words->len == 0)
+ return g_ptr_array_new();
+ else if (words->len == 1)
+ return ibex_find(ib, g_ptr_array_index(words, 0));
+
+ work = g_tree_new(strcmp);
+ for (i = 0; i < words->len; i++)
+ {
+ word = g_ptr_array_index(words, i);
+ wrefs = g_hash_table_lookup(ib->words, word);
+ if (!wrefs)
+ {
+ /* One of the words isn't even in the index. */
+ g_tree_destroy(work);
+ return g_ptr_array_new();
+ }
+
+ if (i == 0)
+ {
+ /* Copy the references into a tree, using the filenames as
+ * keys and the size of words as the value.
+ */
+ for (j = 0; j < wrefs->len; j++)
+ {
+ ibf = g_ptr_array_index(wrefs, j);
+ g_tree_insert(work, ibf->name, GUINT_TO_POINTER(words->len));
+ }
+ }
+ else
+ {
+ /* Increment the counts in the working tree for the references
+ * for this word.
+ */
+ for (j = 0; j < wrefs->len; j++)
+ {
+ ibf = g_ptr_array_index(wrefs, j);
+ count = GPOINTER_TO_UINT(g_tree_lookup(work, ibf->name));
+ if (count)
+ g_tree_insert(work, ibf->name, GUINT_TO_POINTER(count - 1));
+ }
+ }
+ }
+
+ /* Build an array with the refs that contain all the words. */
+ ret = g_ptr_array_new();
+ g_tree_traverse(work, build_array, G_IN_ORDER, ret);
+ g_tree_destroy(work);
+ return ret;
+}
diff --git a/libibex/ibex.h b/libibex/ibex.h
new file mode 100644
index 0000000000..e430fc700d
--- /dev/null
+++ b/libibex/ibex.h
@@ -0,0 +1,74 @@
+/*
+ Copyright 2000 Helix Code Inc.
+*/
+
+#ifndef _IBEX_H
+#define _IBEX_H
+
+#include <sys/types.h>
+#include <glib.h>
+
+struct ibex;
+typedef struct ibex ibex;
+
+/* All functions that can fail set errno and return NULL or -1 on
+ * failure.
+ */
+
+/* Open the named ibex index file. If CREATE is true, create the file
+ * if it doesn't already exist.
+ */
+ibex *ibex_open(char *file, gboolean create);
+
+/* Write the ibex to disk. */
+int ibex_write(ibex *ib);
+
+/* Write the ibex to disk if it has changed, and free all memory
+ * associated with it.
+ */
+int ibex_close(ibex *ib);
+
+
+
+/* Index the named file. (If the FILENAME is already in the index,
+ * remove the old copy.
+ */
+int ibex_index_file(ibex *ib, char *filename);
+
+/* Index LEN bytes off FD, using NAME as the filename in the index.
+ * (If NAME already exists in the index, this adds more data to it.)
+ */
+int ibex_index_fd(ibex *ib, char *name, int fd, size_t len);
+
+/* Like ibex_index_fd, but with a buffer rather than a file descriptor.
+ * The buffer does not need to be '\0'-terminated. If UNREAD is not
+ * NULL, then the indexer won't assume that the buffer ends on a word
+ * boundary, and will return (in UNREAD) the number of bytes from the
+ * end of the buffer that it didn't use, if any.
+ */
+int ibex_index_buffer(ibex *ib, char *name, char *buffer,
+ size_t len, size_t *unread);
+
+/* Remove entries for a given file from the index. (Most of the removal
+ * isn't actually done until the file is written out to disk, so this
+ * is very fast.)
+ */
+void ibex_unindex(ibex *ib, char *name);
+
+/* Rename a file in the index. (This is also fast.) */
+void ibex_rename(ibex *ib, char *oldfilename, char *newfilename);
+
+
+
+/* Find a word in the index. Returns an array of strings: the caller
+ * should free the array, but should not free or modify the strings.
+ */
+GPtrArray *ibex_find(ibex *ib, char *word);
+
+/* Return all the files containing all of the words in the given
+ * array. Returned data is like with ibex_find.
+ */
+GPtrArray *ibex_find_all(ibex *ib, GPtrArray *words);
+
+#endif /* ! _IBEX_H */
+
diff --git a/libibex/ibex_internal.h b/libibex/ibex_internal.h
new file mode 100644
index 0000000000..1aabfb98c0
--- /dev/null
+++ b/libibex/ibex_internal.h
@@ -0,0 +1,26 @@
+/*
+ Copyright 2000 Helix Code Inc.
+*/
+#include <glib.h>
+
+#include "ibex.h"
+
+#define IBEX_VERSION "ibex1"
+
+struct ibex {
+ char *path;
+ GTree *files;
+ GHashTable *words;
+ GPtrArray *oldfiles;
+ gboolean dirty;
+};
+
+struct ibex_file {
+ char *name;
+ long index;
+};
+typedef struct ibex_file ibex_file;
+
+gint ibex__strcmp(gconstpointer a, gconstpointer b);
+
+#define IBEX_BUFSIZ 1024
diff --git a/libibex/index.c b/libibex/index.c
new file mode 100644
index 0000000000..aef891182e
--- /dev/null
+++ b/libibex/index.c
@@ -0,0 +1,101 @@
+/*
+ Copyright 2000 Helix Code Inc.
+*/
+/* index.c: high-level indexing ops */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "ibex_internal.h"
+
+/* Index a file, given its name. (Replace any previously indexed contents
+ * of this file with the new contents.)
+ */
+int
+ibex_index_file(ibex *ib, char *filename)
+{
+ int fd;
+ int status;
+ struct stat st;
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ if (fstat(fd, &st) == -1)
+ {
+ close(fd);
+ return -1;
+ }
+ if (!S_ISREG(st.st_mode))
+ {
+ close(fd);
+ errno = EINVAL;
+ return -1;
+ }
+
+ ibex_unindex(ib, filename);
+ status = ibex_index_fd(ib, filename, fd, st.st_size);
+ close(fd);
+ return status;
+}
+
+/* Given a file descriptor and a name to refer to it by, index LEN
+ * bytes of data from it.
+ */
+int
+ibex_index_fd(ibex *ib, char *name, int fd, size_t len)
+{
+ char *buf;
+ int off = 0, nread, status;
+
+ buf = g_malloc(len);
+ do
+ {
+ nread = read(fd, buf + off, len - off);
+ if (nread == -1)
+ {
+ g_free(buf);
+ return -1;
+ }
+ off += nread;
+ }
+ while (off != len);
+
+ status = ibex_index_buffer(ib, name, buf, len, NULL);
+ g_free(buf);
+
+ return status;
+}
+
+void
+ibex_unindex(ibex *ib, char *name)
+{
+ ibex_file *ibf;
+
+ ibf = g_tree_lookup(ib->files, name);
+ if (ibf)
+ {
+ ibf->index = -1;
+ g_tree_remove(ib->files, name);
+ g_ptr_array_add(ib->oldfiles, ibf);
+ }
+}
+
+void
+ibex_rename(ibex *ib, char *oldname, char *newname)
+{
+ ibex_file *ibf;
+
+ ibf = g_tree_lookup(ib->files, oldname);
+ if (ibf)
+ {
+ g_tree_remove(ib->files, oldname);
+ g_free(ibf->name);
+ ibf->name = g_strdup(newname);
+ g_tree_insert(ib->files, ibf->name, ibf);
+ }
+}
diff --git a/libibex/lookup.c b/libibex/lookup.c
new file mode 100644
index 0000000000..d6bdec06a5
--- /dev/null
+++ b/libibex/lookup.c
@@ -0,0 +1,74 @@
+/*
+ Copyright 2000 Helix Code Inc.
+*/
+
+/* lookup.c: a simple client, part 2 */
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ibex.h"
+
+extern int optind;
+extern char *optarg;
+
+static void
+usage(void)
+{
+ fprintf(stderr, "Usage: lookup [-f indexfile] word ...\n");
+ exit(1);
+}
+
+int
+main(int argc, char **argv)
+{
+ ibex *ib;
+ GPtrArray *ans, *words;
+ int opt, i;
+ char *file = "INDEX";
+
+ while ((opt = getopt(argc, argv, "f:")) != -1)
+ {
+ switch (opt)
+ {
+ case 'f':
+ file = optarg;
+ break;
+
+ default:
+ usage();
+ break;
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc == 0)
+ usage();
+
+ ib = ibex_open(file, FALSE);
+ if (!ib)
+ {
+ printf("Couldn't open %s: %s\n", file, strerror(errno));
+ exit(1);
+ }
+
+ words = g_ptr_array_new();
+ while (argc--)
+ g_ptr_array_add(words, argv[argc]);
+
+ ans = ibex_find_all(ib, words);
+ if (ans)
+ {
+ for (i = 0; i < ans->len; i++)
+ printf("%s\n", (char *)g_ptr_array_index(ans, i));
+ exit(0);
+ }
+ else
+ {
+ printf("Nope.\n");
+ exit(1);
+ }
+}
diff --git a/libibex/mkindex.c b/libibex/mkindex.c
new file mode 100644
index 0000000000..8018caef69
--- /dev/null
+++ b/libibex/mkindex.c
@@ -0,0 +1,75 @@
+/*
+ Copyright 2000 Helix Code Inc.
+*/
+/* mkindex.c: a simple client, part 1 */
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ibex.h"
+
+extern int optind;
+extern char *optarg;
+
+static void
+usage(void)
+{
+ fprintf(stderr, "Usage: mkindex [-f indexfile] file ...\n");
+ exit(1);
+}
+
+int
+main(int argc, char **argv)
+{
+ ibex *ib;
+ int opt;
+ char *file = "INDEX";
+
+ while ((opt = getopt(argc, argv, "f:")) != -1)
+ {
+ switch (opt)
+ {
+ case 'f':
+ file = optarg;
+ break;
+
+ default:
+ usage();
+ break;
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc == 0)
+ usage();
+
+ ib = ibex_open(file, TRUE);
+ if (!ib)
+ {
+ fprintf(stderr, "Couldn't open index file %s: %s\n",
+ file, strerror(errno));
+ exit(1);
+ }
+
+ while (argc--)
+ {
+ if (ibex_index_file(ib, argv[argc]) == -1)
+ {
+ fprintf(stderr, "Couldn't index %s: %s\n", argv[argc],
+ strerror(errno));
+ exit(1);
+ }
+ }
+
+
+ if (ibex_close(ib) != 0)
+ {
+ fprintf(stderr, "Failed to write index file %s: %s\n",
+ file, strerror(errno));
+ exit(1);
+ }
+ exit(0);
+}
diff --git a/libibex/words.c b/libibex/words.c
new file mode 100644
index 0000000000..4776634251
--- /dev/null
+++ b/libibex/words.c
@@ -0,0 +1,263 @@
+/*
+ Copyright 2000 Helix Code Inc.
+*/
+/* words.c: low-level indexing ops */
+
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+
+#include <unicode.h>
+
+#include "ibex_internal.h"
+
+static signed char utf8_trans[] = {
+ 'A', 'A', 'A', 'A', 'A', 'A', -1, 'C', 'E', 'E', 'E', 'E', 'I', 'I',
+ 'I', 'I', -2, 'N', 'O', 'O', 'O', 'O', 'O', '*', 'O', 'U', 'U', 'U',
+ 'U', 'Y', -3, -4, 'a', 'a', 'a', 'a', 'a', 'a', -5, 'c', 'e', 'e',
+ 'e', 'e', 'i', 'i', 'i', 'i', -6, 'n', 'o', 'o', 'o', 'o', 'o', '/',
+ 'o', 'u', 'u', 'u', 'u', 'y', -7, 'y', 'A', 'a', 'A', 'a', 'A', 'a',
+ 'C', 'c', 'C', 'c', 'C', 'c', 'C', 'c', 'D', 'd', 'D', 'd', 'E', 'e',
+ 'E', 'e', 'E', 'e', 'E', 'e', 'E', 'e', 'G', 'g', 'G', 'g', 'G', 'g',
+ 'G', 'g', 'H', 'h', 'H', 'h', 'I', 'i', 'I', 'i', 'I', 'i', 'I', 'i',
+ 'I', 'i', -8, -9, 'J', 'j', 'K', 'k', 'k', 'L', 'l', 'L', 'l', 'L',
+ 'l', 'L', 'l', 'L', 'l', 'N', 'n', 'N', 'n', 'N', 'n', 'n', -10, -11,
+ 'O', 'o', 'O', 'o', 'O', 'o', -12, -13, 'R', 'r', 'R', 'r', 'R', 'r',
+ 'S', 'r', 'S', 's', 'S', 's', 'S', 's', 'T', 't', 'T', 't', 'T', 't',
+ 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'U', 'u', 'W', 'w',
+ 'Y', 'y', 'Y', 'Z', 'z', 'Z', 'z', 'Z', 'z', 's'
+};
+
+static char *utf8_long_trans[] = {
+ "AE", "TH", "TH", "ss", "ae", "th", "th", "IJ", "ij", "NG", "ng", "OE", "oe"
+};
+
+/* This is a bit weird. It takes pointers to the start and end (actually
+ * just past the end) of a UTF-8-encoded word, and a buffer at least 1
+ * byte longer than the length of the word. It copies the word into the
+ * buffer in all lowercase without accents, and splits up ligatures.
+ * (Since any ligature would be a multi-byte character in UTF-8, splitting
+ * them into two US-ASCII characters won't overrun the buffer.)
+ *
+ * It is not safe to call this routine with bad UTF-8.
+ */
+static void
+normalize_word(char *start, char *end, char *buf)
+{
+ unsigned char *s, *d;
+ unicode_char_t uc;
+
+ s = (unsigned char *)start;
+ d = (unsigned char *)buf;
+ while (s < (unsigned char *)end)
+ {
+ if (*s < 0x80)
+ {
+ /* US-ASCII character: copy unless it's an apostrophe. */
+ if (*s != '\'')
+ *d++ = tolower(*s);
+ s++;
+ }
+ else
+ {
+ char *next = unicode_get_utf8(s, &uc);
+ if (uc >= 0xc0 && uc < 0xc0 + sizeof(utf8_trans))
+ {
+ signed char ch = utf8_trans[uc - 0xc0];
+ if (ch > 0)
+ *d++ = tolower(ch);
+ else
+ {
+ *d++ = tolower(utf8_long_trans[-ch - 1][0]);
+ *d++ = tolower(utf8_long_trans[-ch - 1][1]);
+ }
+ s = next;
+ }
+ else
+ {
+ while (s < (unsigned char *)next)
+ *d++ = *s++;
+ }
+ }
+ }
+ *d = '\0';
+}
+
+enum { IBEX_ALPHA, IBEX_NONALPHA, IBEX_INVALID, IBEX_INCOMPLETE };
+
+/* This incorporates parts of libunicode, because there's no way to
+ * force libunicode to not read past a certain point.
+ */
+static int
+utf8_category(char *sp, char **snp, char *send)
+{
+ unsigned char *p = (unsigned char *)sp, **np = (unsigned char **)snp;
+ unsigned char *end = (unsigned char *)send;
+
+ if (isascii(*p))
+ {
+ *np = p + 1;
+ if (isalpha(*p) || *p == '\'')
+ return IBEX_ALPHA;
+ return IBEX_NONALPHA;
+ }
+ else
+ {
+ unicode_char_t uc;
+ int more;
+
+ if ((*p & 0xe0) == 0xc0)
+ {
+ more = 1;
+ uc = *p & 0x1f;
+ }
+ else if ((*p & 0xf0) == 0xe0)
+ {
+ more = 2;
+ uc = *p & 0x0f;
+ }
+ else if ((*p & 0xf8) == 0xf0)
+ {
+ more = 3;
+ uc = *p & 0x07;
+ }
+ else if ((*p & 0xfc) == 0xf8)
+ {
+ more = 4;
+ uc = *p & 0x03;
+ }
+ else if ((*p & 0xfe) == 0xfc)
+ {
+ more = 5;
+ uc = *p & 0x01;
+ }
+ else
+ return IBEX_INVALID;
+
+ if (p + more > end)
+ return IBEX_INCOMPLETE;
+
+ while (more--)
+ {
+ if ((*++p & 0xc0) != 0x80)
+ return IBEX_INVALID;
+ uc <<= 6;
+ uc |= *p & 0x3f;
+ }
+
+ *np = p + 1;
+ if (unicode_isalpha(uc))
+ return IBEX_ALPHA;
+ else
+ return IBEX_NONALPHA;
+ }
+}
+
+static ibex_file *
+get_ibex_file(ibex *ib, char *name)
+{
+ ibex_file *ibf;
+
+ ibf = g_tree_lookup(ib->files, name);
+ if (!ibf)
+ {
+ ibf = g_malloc(sizeof(ibex_file));
+ ibf->name = strdup(name);
+ ibf->index = 0;
+ g_tree_insert(ib->files, ibf->name, ibf);
+ ib->dirty = TRUE;
+ }
+ return ibf;
+}
+
+static void
+ref_word(ibex *ib, ibex_file *ibf, char *word)
+{
+ GPtrArray *refs;
+
+ refs = g_hash_table_lookup(ib->words, word);
+ if (!refs)
+ {
+ refs = g_ptr_array_new();
+ g_hash_table_insert(ib->words, g_strdup(word), refs);
+ g_ptr_array_add(refs, ibf);
+ ib->dirty = TRUE;
+ }
+ else if (g_ptr_array_index(refs, refs->len - 1) != ibf)
+ {
+ g_ptr_array_add(refs, ibf);
+ ib->dirty = TRUE;
+ }
+}
+
+int
+ibex_index_buffer(ibex *ib, char *name, char *buffer,
+ size_t len, size_t *unread)
+{
+ char *p, *q, *nq, *end, *word;
+ ibex_file *ibf = get_ibex_file(ib, name);
+ int wordsiz, cat;
+
+ end = buffer + len;
+ wordsiz = 20;
+ word = g_malloc(wordsiz);
+
+ p = buffer;
+ while (p < end)
+ {
+ while (p < end)
+ {
+ cat = utf8_category(p, &q, end);
+ if (cat != IBEX_NONALPHA)
+ break;
+ p = q;
+ }
+ if (p == end)
+ {
+ g_free(word);
+ return 0;
+ }
+ else if (cat == IBEX_INVALID)
+ {
+ errno = EINVAL;
+ g_free(word);
+ return -1;
+ }
+ else if (cat == IBEX_INCOMPLETE)
+ q = end;
+
+ while (q < end)
+ {
+ cat = utf8_category(q, &nq, end);
+ if (cat != IBEX_ALPHA)
+ break;
+ q = nq;
+ }
+ if (cat == IBEX_INVALID || (cat == IBEX_INCOMPLETE && !unread))
+ {
+ errno = EINVAL;
+ g_free(word);
+ return -1;
+ }
+ else if (cat == IBEX_INCOMPLETE || (q == end && unread))
+ {
+ *unread = end - p;
+ g_free(word);
+ return 0;
+ }
+
+ if (wordsiz < q - p + 1)
+ {
+ wordsiz = q - p + 1;
+ word = g_realloc(word, wordsiz);
+ }
+ normalize_word(p, q, word);
+ ref_word(ib, ibf, word);
+ p = q;
+ }
+
+ if (unread)
+ *unread = 0;
+ g_free(word);
+ return 0;
+}