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-rw-r--r--libibex/words.c263
1 files changed, 0 insertions, 263 deletions
diff --git a/libibex/words.c b/libibex/words.c
deleted file mode 100644
index 4776634251..0000000000
--- a/libibex/words.c
+++ /dev/null
@@ -1,263 +0,0 @@
-/*
- 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;
-}
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