xref: /unit/src/nxt_string.h (revision 1481:235553af9977)
1 
2 /*
3  * Copyright (C) Igor Sysoev
4  * Copyright (C) NGINX, Inc.
5  */
6 
7 #ifndef _NXT_STRING_H_INCLUDED_
8 #define _NXT_STRING_H_INCLUDED_
9 
10 
11 #define                                                                       \
12 nxt_lowcase(c)                                                                \
13     (u_char) ((c >= 'A' && c <= 'Z') ? c | 0x20 : c)
14 
15 #define                                                                       \
16 nxt_upcase(c)                                                                 \
17     (u_char) ((c >= 'a' && c <= 'z') ? c & ~0x20 : c)
18 
19 #define                                                                       \
20 nxt_isdigit(c)                                                                \
21     ((u_char) ((c) - '0') <= 9)
22 
23 #define                                                                       \
24 nxt_strtod(s, endptr)                                                         \
25     strtod((char *) s, (char **) endptr)
26 
27 
28 #define                                                                       \
29 nxt_strlen(s)                                                                 \
30     strlen((char *) s)
31 
32 
33 #define                                                                       \
34 nxt_memzero(buf, length)                                                      \
35     (void) memset(buf, 0, length)
36 
37 
38 #define                                                                       \
39 nxt_memset(buf, c, length)                                                    \
40     (void) memset(buf, c, length)
41 
42 
43 #define                                                                       \
44 nxt_memcpy(dst, src, length)                                                  \
45     (void) memcpy(dst, src, length)
46 
47 
48 NXT_EXPORT void nxt_memcpy_lowcase(u_char *dst, const u_char *src,
49     size_t length);
50 NXT_EXPORT void nxt_memcpy_upcase(u_char *dst, const u_char *src,
51     size_t length);
52 
53 
54 /*
55  * nxt_cpymem() is an inline function but not a macro to
56  * eliminate possible double evaluation of length "length".
57  */
58 nxt_inline void *
59 nxt_cpymem(void *dst, const void *src, size_t length)
60 {
61     return ((u_char *) memcpy(dst, src, length)) + length;
62 }
63 
64 
65 #define                                                                       \
66 nxt_memmove(dst, src, length)                                                 \
67     (void) memmove(dst, src, length)
68 
69 
70 #define                                                                       \
71 nxt_memcmp(s1, s2, length)                                                    \
72     memcmp((char *) s1, (char *) s2, length)
73 
74 
75 #define                                                                       \
76 nxt_memchr(s, c, length)                                                      \
77     memchr((char *) s, c, length)
78 
79 
80 #define                                                                       \
81 nxt_strcmp(s1, s2)                                                            \
82     strcmp((char *) s1, (char *) s2)
83 
84 
85 #define                                                                       \
86 nxt_strncmp(s1, s2, length)                                                   \
87     strncmp((char *) s1, (char *) s2, length)
88 
89 
90 NXT_EXPORT u_char *nxt_cpystr(u_char *dst, const u_char *src);
91 NXT_EXPORT u_char *nxt_cpystrn(u_char *dst, const u_char *src, size_t length);
92 NXT_EXPORT nxt_int_t nxt_strcasecmp(const u_char *s1, const u_char *s2);
93 NXT_EXPORT nxt_int_t nxt_strncasecmp(const u_char *s1, const u_char *s2,
94     size_t length);
95 NXT_EXPORT nxt_int_t nxt_memcasecmp(const void *p1, const void *p2,
96     size_t length);
97 
98 NXT_EXPORT u_char *nxt_memstrn(const u_char *s, const u_char *end,
99     const char *ss, size_t length);
100 NXT_EXPORT u_char *nxt_memcasestrn(const u_char *s, const u_char *end,
101     const char *ss, size_t length);
102 NXT_EXPORT u_char *nxt_rmemstrn(const u_char *s, const u_char *end,
103     const char *ss, size_t length);
104 NXT_EXPORT size_t nxt_str_strip(u_char *start, u_char *end);
105 
106 
107 typedef struct {
108     size_t                    length;
109     u_char                    *start;
110 } nxt_str_t;
111 
112 
113 #define nxt_string(str)       { nxt_length(str), (u_char *) str }
114 #define nxt_string_zero(str)  { sizeof(str), (u_char *) str }
115 #define nxt_null_string       { 0, NULL }
116 
117 
118 #define                                                                       \
119 nxt_str_set(str, text)                                                        \
120     do {                                                                      \
121         (str)->length = nxt_length(text);                                     \
122         (str)->start = (u_char *) text;                                       \
123     } while (0)
124 
125 
126 #define                                                                       \
127 nxt_str_null(str)                                                             \
128     do {                                                                      \
129         (str)->length = 0;                                                    \
130         (str)->start = NULL;                                                  \
131     } while (0)
132 
133 
134 NXT_EXPORT nxt_str_t *nxt_str_alloc(nxt_mp_t *mp, size_t length);
135 NXT_EXPORT nxt_str_t *nxt_str_dup(nxt_mp_t *mp, nxt_str_t *dst,
136     const nxt_str_t *src);
137 NXT_EXPORT char *nxt_str_cstrz(nxt_mp_t *mp, const nxt_str_t *src);
138 
139 
140 #define                                                                       \
141 nxt_strstr_eq(s1, s2)                                                         \
142     (((s1)->length == (s2)->length)                                           \
143       && (nxt_memcmp((s1)->start, (s2)->start, (s1)->length) == 0))
144 
145 
146 #define                                                                       \
147 nxt_strcasestr_eq(s1, s2)                                                     \
148     (((s1)->length == (s2)->length)                                           \
149       && (nxt_memcasecmp((s1)->start, (s2)->start, (s1)->length) == 0))
150 
151 
152 #define                                                                       \
153 nxt_str_eq(s, p, _length)                                                     \
154     (((s)->length == _length) && (nxt_memcmp((s)->start, p, _length) == 0))
155 
156 
157 #define                                                                       \
158 nxt_str_start(s, p, _length)                                                  \
159     (((s)->length >= _length) && (nxt_memcmp((s)->start, p, _length) == 0))
160 
161 
162 #define                                                                       \
163 nxt_strchr_eq(s, c)                                                           \
164     (((s)->length == 1) && ((s)->start[0] == c))
165 
166 
167 #define                                                                       \
168 nxt_strchr_start(s, c)                                                        \
169     (((s)->length != 0) && ((s)->start[0] == c))
170 
171 
172 NXT_EXPORT nxt_int_t nxt_strverscmp(const u_char *s1, const u_char *s2);
173 NXT_EXPORT nxt_bool_t nxt_strvers_match(u_char *version, u_char *prefix,
174     size_t length);
175 
176 NXT_EXPORT u_char *nxt_decode_uri(u_char *dst, u_char *src, size_t length);
177 NXT_EXPORT u_char *nxt_decode_uri_plus(u_char *dst, u_char *src, size_t length);
178 NXT_EXPORT uintptr_t nxt_encode_uri(u_char *dst, u_char *src, size_t length);
179 NXT_EXPORT uintptr_t nxt_encode_complex_uri(u_char *dst, u_char *src,
180     size_t length);
181 NXT_EXPORT nxt_bool_t nxt_is_complex_uri_encoded(u_char *s, size_t length);
182 
183 extern const uint8_t  nxt_hex2int[256];
184 
185 
186 #endif /* _NXT_STRING_H_INCLUDED_ */
187