PostgreSQL Source Code  git master
regcustom.h
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1 /*
2  * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
3  *
4  * Development of this software was funded, in part, by Cray Research Inc.,
5  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
6  * Corporation, none of whom are responsible for the results. The author
7  * thanks all of them.
8  *
9  * Redistribution and use in source and binary forms -- with or without
10  * modification -- are permitted for any purpose, provided that
11  * redistributions in source form retain this entire copyright notice and
12  * indicate the origin and nature of any modifications.
13  *
14  * I'd appreciate being given credit for this package in the documentation
15  * of software which uses it, but that is not a requirement.
16  *
17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
19  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
20  * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
26  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * src/include/regex/regcustom.h
29  */
30 
31 /* headers if any */
32 
33 /*
34  * It's against Postgres coding conventions to include postgres.h in a
35  * header file, but we allow the violation here because the regexp library
36  * files specifically intend this file to supply application-dependent
37  * headers, and are careful to include this file before anything else.
38  */
39 #include "postgres.h"
40 
41 #include <ctype.h>
42 #include <limits.h>
43 
44 /*
45  * towlower() and friends should be in <wctype.h>, but some pre-C99 systems
46  * declare them in <wchar.h>, so include that too.
47  */
48 #include <wchar.h>
49 #ifdef HAVE_WCTYPE_H
50 #include <wctype.h>
51 #endif
52 
53 #include "mb/pg_wchar.h"
54 
55 #include "miscadmin.h" /* needed by rcancelrequested/rstacktoodeep */
56 
57 
58 /* overrides for regguts.h definitions, if any */
59 #define FUNCPTR(name, args) (*name) args
60 #define MALLOC(n) malloc(n)
61 #define FREE(p) free(VS(p))
62 #define REALLOC(p,n) realloc(VS(p),n)
63 #define assert(x) Assert(x)
64 
65 /* internal character type and related */
66 typedef pg_wchar chr; /* the type itself */
67 typedef unsigned uchr; /* unsigned type that will hold a chr */
68 
69 #define CHR(c) ((unsigned char) (c)) /* turn char literal into chr literal */
70 #define DIGITVAL(c) ((c)-'0') /* turn chr digit into its value */
71 #define CHRBITS 32 /* bits in a chr; must not use sizeof */
72 #define CHR_MIN 0x00000000 /* smallest and largest chr; the value */
73 #define CHR_MAX 0x7ffffffe /* CHR_MAX-CHR_MIN+1 must fit in an int, and
74  * CHR_MAX+1 must fit in a chr variable */
75 
76 /*
77  * Check if a chr value is in range. Ideally we'd just write this as
78  * ((c) >= CHR_MIN && (c) <= CHR_MAX)
79  * However, if chr is unsigned and CHR_MIN is zero, the first part of that
80  * is a no-op, and certain overly-nannyish compilers give warnings about it.
81  * So we leave that out here. If you want to make chr signed and/or CHR_MIN
82  * not zero, redefine this macro as above. Callers should assume that the
83  * macro may multiply evaluate its argument, even though it does not today.
84  */
85 #define CHR_IS_IN_RANGE(c) ((c) <= CHR_MAX)
86 
87 /*
88  * MAX_SIMPLE_CHR is the cutoff between "simple" and "complicated" processing
89  * in the color map logic. It should usually be chosen high enough to ensure
90  * that all common characters are <= MAX_SIMPLE_CHR. However, very large
91  * values will be counterproductive since they cause more regex setup time.
92  * Also, small values can be helpful for testing the high-color-map logic
93  * with plain old ASCII input.
94  */
95 #define MAX_SIMPLE_CHR 0x7FF /* suitable value for Unicode */
96 
97 /* functions operating on chr */
98 #define iscalnum(x) pg_wc_isalnum(x)
99 #define iscalpha(x) pg_wc_isalpha(x)
100 #define iscdigit(x) pg_wc_isdigit(x)
101 #define iscspace(x) pg_wc_isspace(x)
102 
103 /* and pick up the standard header */
104 #include "regex.h"
pg_wchar chr
Definition: regcustom.h:66
unsigned int pg_wchar
Definition: mbprint.c:31
unsigned uchr
Definition: regcustom.h:67