From 5770336f8be4ac6dbdff43587fda2b508d3786de Mon Sep 17 00:00:00 2001
From: ksaito <ksaito@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 5 Mar 2004 15:31:51 +0000
Subject: Initial revision

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5892 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 regenc.c | 586 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 586 insertions(+)
 create mode 100644 regenc.c

(limited to 'regenc.c')

diff --git a/regenc.c b/regenc.c
new file mode 100644
index 0000000000..21598ca7c7
--- /dev/null
+++ b/regenc.c
@@ -0,0 +1,586 @@
+/**********************************************************************
+
+  regenc.c -  Oniguruma (regular expression library)
+
+  Copyright (C) 2003-2004  K.Kosako (kosako@sofnec.co.jp)
+
+**********************************************************************/
+#include "regenc.h"
+
+OnigEncoding OnigEncDefaultCharEncoding = ONIG_ENCODING_INIT_DEFAULT;
+
+extern int
+onigenc_init()
+{
+  return 0;
+}
+
+extern OnigEncoding
+onigenc_get_default_encoding()
+{
+  return OnigEncDefaultCharEncoding;
+}
+
+extern int
+onigenc_set_default_encoding(OnigEncoding enc)
+{
+  OnigEncDefaultCharEncoding = enc;
+  return 0;
+}
+
+extern UChar*
+onigenc_get_right_adjust_char_head(OnigEncoding enc, UChar* start, UChar* s)
+{
+  UChar* p = ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc, start, s);
+  if (p < s) {
+    p += enc_len(enc, *p);
+  }
+  return p;
+}
+
+extern UChar*
+onigenc_get_right_adjust_char_head_with_prev(OnigEncoding enc,
+				   UChar* start, UChar* s, UChar** prev)
+{
+  UChar* p = ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc, start, s);
+
+  if (p < s) {
+    if (prev) *prev = p;
+    p += enc_len(enc, *p);
+  }
+  else {
+    if (prev) *prev = (UChar* )NULL; /* Sorry */
+  }
+  return p;
+}
+
+extern UChar*
+onigenc_get_prev_char_head(OnigEncoding enc, UChar* start, UChar* s)
+{
+  if (s <= start)
+    return (UChar* )NULL;
+
+  return ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc, start, s - 1);
+}
+
+extern UChar*
+onigenc_step_back(OnigEncoding enc, UChar* start, UChar* s, int n)
+{
+  while (ONIG_IS_NOT_NULL(s) && n-- > 0) {
+    if (s <= start)
+      return (UChar* )NULL;
+
+    s = ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc, start, s - 1);
+  }
+  return s;
+}
+
+
+#ifndef ONIG_RUBY_M17N
+
+#ifndef NOT_RUBY
+#define USE_APPLICATION_TO_LOWER_CASE_TABLE
+#endif
+
+UChar* OnigEncAsciiToLowerCaseTable = (UChar* )0;
+
+#ifndef USE_APPLICATION_TO_LOWER_CASE_TABLE
+static UChar BuiltInAsciiToLowerCaseTable[] = {
+  '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
+  '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
+  '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
+  '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
+  '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
+  '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
+  '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
+  '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
+  '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+  '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+  '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+  '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
+  '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+  '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+  '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+  '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
+  '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
+  '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
+  '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
+  '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
+  '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
+  '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
+  '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
+  '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
+  '\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
+  '\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
+  '\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
+  '\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
+  '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
+  '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
+  '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
+  '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
+};
+#endif /* not USE_APPLICATION_TO_LOWER_CASE_TABLE */
+
+unsigned short OnigEncAsciiCtypeTable[256] = {
+  0x1004, 0x1004, 0x1004, 0x1004, 0x1004, 0x1004, 0x1004, 0x1004,
+  0x1004, 0x1106, 0x1104, 0x1104, 0x1104, 0x1104, 0x1004, 0x1004,
+  0x1004, 0x1004, 0x1004, 0x1004, 0x1004, 0x1004, 0x1004, 0x1004,
+  0x1004, 0x1004, 0x1004, 0x1004, 0x1004, 0x1004, 0x1004, 0x1004,
+  0x1142, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x10d0,
+  0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x10d0,
+  0x1c58, 0x1c58, 0x1c58, 0x1c58, 0x1c58, 0x1c58, 0x1c58, 0x1c58,
+  0x1c58, 0x1c58, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x10d0,
+  0x10d0, 0x1e51, 0x1e51, 0x1e51, 0x1e51, 0x1e51, 0x1e51, 0x1a51,
+  0x1a51, 0x1a51, 0x1a51, 0x1a51, 0x1a51, 0x1a51, 0x1a51, 0x1a51,
+  0x1a51, 0x1a51, 0x1a51, 0x1a51, 0x1a51, 0x1a51, 0x1a51, 0x1a51,
+  0x1a51, 0x1a51, 0x1a51, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x18d0,
+  0x10d0, 0x1c71, 0x1c71, 0x1c71, 0x1c71, 0x1c71, 0x1c71, 0x1871,
+  0x1871, 0x1871, 0x1871, 0x1871, 0x1871, 0x1871, 0x1871, 0x1871,
+  0x1871, 0x1871, 0x1871, 0x1871, 0x1871, 0x1871, 0x1871, 0x1871,
+  0x1871, 0x1871, 0x1871, 0x10d0, 0x10d0, 0x10d0, 0x10d0, 0x1004,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+  0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
+};
+
+extern void
+onigenc_set_default_caseconv_table(UChar* table)
+{
+  if (table == (UChar* )0) {
+#ifndef USE_APPLICATION_TO_LOWER_CASE_TABLE
+    table = BuiltInAsciiToLowerCaseTable;
+#else
+    return ;
+#endif
+  }
+
+  if (table != OnigEncAsciiToLowerCaseTable) {
+    OnigEncAsciiToLowerCaseTable = table;
+  }
+}
+
+extern UChar*
+onigenc_get_left_adjust_char_head(OnigEncoding enc, UChar* start, UChar* s)
+{
+  return ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc, start, s);
+}
+
+extern int
+onigenc_nothing_get_all_fold_match_code(OnigCodePoint** codes)
+{
+  return 0;
+}
+
+extern int
+onigenc_nothing_get_fold_match_info(UChar* p, UChar* end,
+				OnigEncFoldMatchInfo** info)
+{
+  return -1;
+}
+
+extern int
+onigenc_nothing_get_ctype_code_range(int ctype, int* nsb, int* nmb,
+			 OnigCodePointRange* sbr[], OnigCodePointRange* mbr[])
+{
+  return -1;
+}
+
+/* for single byte encodings */
+extern int
+onigenc_ascii_mbc_to_lower(UChar* p, UChar* lower)
+{
+  *lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
+  return 1; /* return byte length of converted char to lower */
+}
+
+extern int
+onigenc_ascii_mbc_is_case_ambig(UChar* p)
+{
+  return ONIGENC_IS_ASCII_CODE_CASE_AMBIG(*p);
+}
+
+extern OnigCodePoint
+onigenc_single_byte_mbc_to_code(UChar* p, UChar* end)
+{
+  return (OnigCodePoint )(*p);
+}
+
+extern int
+onigenc_single_byte_code_to_mbclen(OnigCodePoint code)
+{
+  return 1;
+}
+
+extern int
+onigenc_single_byte_code_to_mbc_first(OnigCodePoint code)
+{
+  return (code & 0xff);
+}
+
+extern int
+onigenc_single_byte_code_to_mbc(OnigCodePoint code, UChar *buf)
+{
+  *buf = (UChar )(code & 0xff);
+  return 1;
+}
+
+extern UChar*
+onigenc_single_byte_left_adjust_char_head(UChar* start, UChar* s)
+{
+  return s;
+}
+
+extern int
+onigenc_single_byte_is_allowed_reverse_match(UChar* s, UChar* end)
+{
+  return TRUE;
+}
+
+extern OnigCodePoint
+onigenc_mbn_mbc_to_code(OnigEncoding enc, UChar* p, UChar* end)
+{
+  int c, i, len;
+  OnigCodePoint n;
+
+  c = *p++;
+  len = enc_len(enc, c);
+  n = c;
+  if (len == 1) return n;
+
+  for (i = 1; i < len; i++) {
+    if (p >= end) break;
+    c = *p++;
+    n <<= 8;  n += c;
+  }
+  return n;
+}
+
+extern int
+onigenc_mbn_mbc_to_lower(OnigEncoding enc, UChar* p, UChar* lower)
+{
+  int len;
+
+  if (ONIGENC_IS_MBC_ASCII(p)) {
+    *lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
+    return 1;
+  }
+  else {
+    len = enc_len(enc, *p);
+    if (lower != p) {
+      /* memcpy(lower, p, len); */
+      int i;
+      for (i = 0; i < len; i++) {
+	*lower++ = *p++;
+      }
+    }
+    return len; /* return byte length of converted to lower char */
+  }
+}
+
+extern int
+onigenc_mbn_mbc_is_case_ambig(UChar* p)
+{
+  if (ONIGENC_IS_MBC_ASCII(p))
+    return ONIGENC_IS_ASCII_CODE_CASE_AMBIG(*p);
+
+  return FALSE;
+}
+
+extern int
+onigenc_mb2_code_to_mbclen(OnigCodePoint code)
+{
+  if ((code & 0xff00) != 0) return 2;
+  else return 1;
+}
+
+extern int
+onigenc_mb4_code_to_mbclen(OnigCodePoint code)
+{
+       if ((code & 0xff000000) != 0) return 4;
+  else if ((code & 0xff0000) != 0) return 3;
+  else if ((code & 0xff00) != 0) return 2;
+  else return 1;
+}
+
+extern int
+onigenc_mb2_code_to_mbc_first(OnigCodePoint code)
+{
+  int first;
+
+  if ((code & 0xff00) != 0) {
+    first = (code >> 8) & 0xff;
+  }
+  else {
+    return (int )code;
+  }
+  return first;
+}
+
+extern int
+onigenc_mb4_code_to_mbc_first(OnigCodePoint code)
+{
+  int first;
+
+  if ((code & 0xff000000) != 0) {
+    first = (code >> 24) & 0xff;
+  }
+  else if ((code & 0xff0000) != 0) {
+    first = (code >> 16) & 0xff;
+  }
+  else if ((code & 0xff00) != 0) {
+    first = (code >>  8) & 0xff;
+  }
+  else {
+    return (int )code;
+  }
+  return first;
+}
+
+extern int
+onigenc_mb2_code_to_mbc(OnigEncoding enc, OnigCodePoint code, UChar *buf)
+{
+  UChar *p = buf;
+
+  if ((code & 0xff00) != 0) {
+    *p++ = (UChar )((code >>  8) & 0xff);
+  }
+  *p++ = (UChar )(code & 0xff);
+
+#if 1
+  if (enc_len(enc, buf[0]) != (p - buf))
+    return ONIGERR_INVALID_WIDE_CHAR_VALUE;
+#endif
+  return p - buf;
+}
+
+extern int
+onigenc_mb4_code_to_mbc(OnigEncoding enc, OnigCodePoint code, UChar *buf)
+{
+  UChar *p = buf;
+
+  if ((code & 0xff000000) != 0) {
+    *p++ = (UChar )((code >> 24) & 0xff);
+  }
+  if ((code & 0xff0000) != 0) {
+    *p++ = (UChar )((code >> 16) & 0xff);
+  }
+  if ((code & 0xff00) != 0) {
+    *p++ = (UChar )((code >> 8) & 0xff);
+  }
+  *p++ = (UChar )(code & 0xff);
+
+#if 1
+  if (enc_len(enc, buf[0]) != (p - buf))
+    return ONIGERR_INVALID_WIDE_CHAR_VALUE;
+#endif
+  return p - buf;
+}
+
+extern int
+onigenc_mb2_code_is_ctype(OnigEncoding enc, OnigCodePoint code,
+			  unsigned int ctype)
+{
+  if ((ctype & ONIGENC_CTYPE_WORD) != 0) {
+    if (code < 128)
+      return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
+    else {
+      int first = onigenc_mb2_code_to_mbc_first(code);
+      return (enc_len(enc, first) > 1 ? TRUE : FALSE);
+    }
+
+    ctype &= ~ONIGENC_CTYPE_WORD;
+    if (ctype == 0) return FALSE;
+  }
+
+  if (code < 128)
+    return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
+  else
+    return FALSE;
+}
+
+extern int
+onigenc_mb4_code_is_ctype(OnigEncoding enc, OnigCodePoint code,
+			  unsigned int ctype)
+{
+  if ((ctype & ONIGENC_CTYPE_WORD) != 0) {
+    if (code < 128)
+      return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
+    else {
+      int first = onigenc_mb4_code_to_mbc_first(code);
+      return (enc_len(enc, first) > 1 ? TRUE : FALSE);
+    }
+
+    ctype &= ~ONIGENC_CTYPE_WORD;
+    if (ctype == 0) return FALSE;
+  }
+
+  if (code < 128)
+    return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
+  else
+    return FALSE;
+}
+
+extern int
+onigenc_get_all_fold_match_code_ss_0xdf(OnigCodePoint** codes)
+{
+  static OnigCodePoint list[] = { 0xdf };
+  *codes = list;
+  return 1;
+}
+
+extern int
+onigenc_get_fold_match_info_ss_0xdf(UChar* p, UChar* end,
+				    OnigEncFoldMatchInfo** info)
+{
+  /* German alphabet ess-tsett(U+00DF) */
+  static OnigEncFoldMatchInfo ss = {
+    3,
+    { 1, 2, 2 },
+    { "\337", "ss", "SS" } /* 0337: 0xdf */
+  };
+
+  if (p >= end) return -1;
+
+  if (*p == 0xdf) {
+    *info = &ss;
+    return 1;
+  }
+  else if (p + 1 < end) {
+    if ((*p == 'S' && *(p+1) == 'S') ||
+	(*p == 's' && *(p+1) == 's')) {
+      *info = &ss;
+      return 2;
+    }
+  }
+
+  return -1; /* is not a fold string. */
+}
+
+#else /* ONIG_RUBY_M17N */
+
+extern int
+onigenc_is_code_ctype(OnigEncoding enc, OnigCodePoint code, int ctype)
+{
+  switch (ctype) {
+  case ONIGENC_CTYPE_ALPHA:
+    return m17n_isalpha(enc, code);
+    break;
+  case ONIGENC_CTYPE_BLANK:
+    return ONIGENC_IS_CODE_BLANK(enc, (int )(code));
+    break;
+  case ONIGENC_CTYPE_CNTRL:
+    return m17n_iscntrl(enc, code);
+    break;
+  case ONIGENC_CTYPE_DIGIT:
+    return m17n_isdigit(enc, code);
+    break;
+  case ONIGENC_CTYPE_GRAPH:
+    return ONIGENC_IS_CODE_GRAPH(enc, (int )(code));
+    break;
+  case ONIGENC_CTYPE_LOWER:
+    return m17n_islower(enc, code);
+    break;
+  case ONIGENC_CTYPE_PRINT:
+    return m17n_isprint(enc, code);
+    break;
+  case ONIGENC_CTYPE_PUNCT:
+    return m17n_ispunct(enc, code);
+    break;
+  case ONIGENC_CTYPE_SPACE:
+    return m17n_isspace(enc, code);
+    break;
+  case ONIGENC_CTYPE_UPPER:
+    return m17n_isupper(enc, code);
+    break;
+  case ONIGENC_CTYPE_XDIGIT:
+    return m17n_isxdigit(enc, code);
+    break;
+  case ONIGENC_CTYPE_WORD:
+    return m17n_iswchar(enc, code);
+    break;
+  case ONIGENC_CTYPE_ASCII:
+    return (code < 128 ? TRUE : FALSE);
+    break;
+  case ONIGENC_CTYPE_ALNUM:
+    return m17n_isalnum(enc, code);
+    break;
+  default:
+    break;
+  }
+
+  return 0;
+}
+
+extern int
+onigenc_code_to_mbc(OnigEncoding enc, OnigCodePoint code, UChar *buf)
+{
+  int c, len;
+
+  m17n_mbcput(enc, code, buf);
+  c = m17n_firstbyte(enc, code);
+  len = enc_len(enc, c);
+  return len;
+}
+
+extern int
+onigenc_mbc_to_lower(OnigEncoding enc, UChar* p, UChar* buf)
+{
+  unsigned int c, low;
+
+  c   = m17n_codepoint(enc, p, p + enc_len(enc, *p));
+  low = m17n_tolower(enc, c);
+  m17n_mbcput(enc, low, buf);
+
+  return m17n_codelen(enc, low);
+}
+
+extern int
+onigenc_mbc_is_case_ambig(OnigEncoding enc, UChar* p)
+{
+  unsigned int c = m17n_codepoint(enc, p, p + enc_len(enc, *p));
+
+  if (m17n_isupper(enc, c) || m17n_islower(enc, c))
+    return TRUE;
+  return FALSE;
+}
+
+extern UChar*
+onigenc_get_left_adjust_char_head(OnigEncoding enc, UChar* start, UChar* s)
+{
+  UChar *p;
+  int len;
+
+  if (s <= start) return s;
+  p = s;
+
+  while (!m17n_islead(enc, *p) && p > start) p--;
+  while (p + (len = enc_len(enc, *p)) < s) {
+    p += len;
+  }
+  if (p + len == s) return s;
+  return p;
+}
+
+extern int
+onigenc_is_allowed_reverse_match(OnigEncoding enc, UChar* s, UChar* end)
+{
+  return ONIGENC_IS_SINGLEBYTE(enc);
+}
+
+extern void
+onigenc_set_default_caseconv_table(UChar* table) { }
+
+#endif /* ONIG_RUBY_M17N */
-- 
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