/[pcre]/code/tags/pcre-4.0/maketables.c
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code/trunk/maketables.c revision 37 by nigel, Sat Feb 24 21:39:09 2007 UTC code/tags/pcre-4.0/maketables.c revision 64 by nigel, Sat Feb 24 21:40:05 2007 UTC
# Line 8  and semantics are as close as possible t Line 8  and semantics are as close as possible t
8    
9  Written by: Philip Hazel <ph10@cam.ac.uk>  Written by: Philip Hazel <ph10@cam.ac.uk>
10    
11             Copyright (c) 1997-1999 University of Cambridge             Copyright (c) 1997-2003 University of Cambridge
12    
13  -----------------------------------------------------------------------------  -----------------------------------------------------------------------------
14  Permission is granted to anyone to use this software for any purpose on any  Permission is granted to anyone to use this software for any purpose on any
# Line 58  Arguments:   none Line 58  Arguments:   none
58  Returns:     pointer to the contiguous block of data  Returns:     pointer to the contiguous block of data
59  */  */
60    
61  unsigned const char *  const unsigned char *
62  pcre_maketables(void)  pcre_maketables(void)
63  {  {
64  unsigned char *yield, *p;  unsigned char *yield, *p;
# Line 81  for (i = 0; i < 256; i++) *p++ = tolower Line 81  for (i = 0; i < 256; i++) *p++ = tolower
81    
82  for (i = 0; i < 256; i++) *p++ = islower(i)? toupper(i) : tolower(i);  for (i = 0; i < 256; i++) *p++ = islower(i)? toupper(i) : tolower(i);
83    
84  /* Then the character class tables */  /* Then the character class tables. Don't try to be clever and save effort
85    on exclusive ones - in some locales things may be different. Note that the
86    table for "space" includes everything "isspace" gives, including VT in the
87    default locale. This makes it work for the POSIX class [:space:]. */
88    
89  memset(p, 0, cbit_length);  memset(p, 0, cbit_length);
90  for (i = 0; i < 256; i++)  for (i = 0; i < 256; i++)
91    {    {
92    if (isdigit(i)) p[cbit_digit  + i/8] |= 1 << (i&7);    if (isdigit(i))
93    if (isalnum(i) || i == '_')      {
94                    p[cbit_word   + i/8] |= 1 << (i&7);      p[cbit_digit  + i/8] |= 1 << (i&7);
95        p[cbit_word   + i/8] |= 1 << (i&7);
96        }
97      if (isupper(i))
98        {
99        p[cbit_upper  + i/8] |= 1 << (i&7);
100        p[cbit_word   + i/8] |= 1 << (i&7);
101        }
102      if (islower(i))
103        {
104        p[cbit_lower  + i/8] |= 1 << (i&7);
105        p[cbit_word   + i/8] |= 1 << (i&7);
106        }
107      if (i == '_')   p[cbit_word   + i/8] |= 1 << (i&7);
108    if (isspace(i)) p[cbit_space  + i/8] |= 1 << (i&7);    if (isspace(i)) p[cbit_space  + i/8] |= 1 << (i&7);
109      if (isxdigit(i))p[cbit_xdigit + i/8] |= 1 << (i&7);
110      if (isgraph(i)) p[cbit_graph  + i/8] |= 1 << (i&7);
111      if (isprint(i)) p[cbit_print  + i/8] |= 1 << (i&7);
112      if (ispunct(i)) p[cbit_punct  + i/8] |= 1 << (i&7);
113      if (iscntrl(i)) p[cbit_cntrl  + i/8] |= 1 << (i&7);
114    }    }
115  p += cbit_length;  p += cbit_length;
116    
117  /* Finally, the character type table */  /* Finally, the character type table. In this, we exclude VT from the white
118    space chars, because Perl doesn't recognize it as such for \s and for comments
119    within regexes. */
120    
121  for (i = 0; i < 256; i++)  for (i = 0; i < 256; i++)
122    {    {
123    int x = 0;    int x = 0;
124    if (isspace(i)) x += ctype_space;    if (i != 0x0b && isspace(i)) x += ctype_space;
125    if (isalpha(i)) x += ctype_letter;    if (isalpha(i)) x += ctype_letter;
126    if (isdigit(i)) x += ctype_digit;    if (isdigit(i)) x += ctype_digit;
127    if (isxdigit(i)) x += ctype_xdigit;    if (isxdigit(i)) x += ctype_xdigit;
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