author | Jon Tibble <meths@btinternet.com> |
Thu, 09 Dec 2010 22:32:39 +0100 | |
changeset 13255 | 4afa820d78b9 |
parent 13105 | 48f2dbca79a2 |
permissions | -rw-r--r-- |
0 | 1 |
/* |
2 |
* CDDL HEADER START |
|
3 |
* |
|
4 |
* The contents of this file are subject to the terms of the |
|
6812 | 5 |
* Common Development and Distribution License (the "License"). |
6 |
* You may not use this file except in compliance with the License. |
|
0 | 7 |
* |
8 |
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
|
9 |
* or http://www.opensolaris.org/os/licensing. |
|
10 |
* See the License for the specific language governing permissions |
|
11 |
* and limitations under the License. |
|
12 |
* |
|
13 |
* When distributing Covered Code, include this CDDL HEADER in each |
|
14 |
* file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
|
15 |
* If applicable, add the following below this CDDL HEADER, with the |
|
16 |
* fields enclosed by brackets "[]" replaced with your own identifying |
|
17 |
* information: Portions Copyright [yyyy] [name of copyright owner] |
|
18 |
* |
|
19 |
* CDDL HEADER END |
|
20 |
*/ |
|
6812 | 21 |
|
0 | 22 |
/* |
13105
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
23 |
* Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 24 |
*/ |
25 |
||
26 |
/* Copyright (c) 1988 AT&T */ |
|
27 |
/* All Rights Reserved */ |
|
28 |
||
6812 | 29 |
#include "lint.h" |
0 | 30 |
#include <string.h> |
31 |
#include <stddef.h> |
|
32 |
#include <sys/types.h> |
|
33 |
||
34 |
/* |
|
35 |
* strstr() locates the first occurrence in the string as1 of |
|
36 |
* the sequence of characters (excluding the terminating null |
|
13105
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
37 |
* character) in the string as2. strstr() returns a pointer |
0 | 38 |
* to the located string, or a null pointer if the string is |
13105
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
39 |
* not found. If as2 is empty, the function returns as1. |
0 | 40 |
*/ |
41 |
||
42 |
char * |
|
43 |
strstr(const char *as1, const char *as2) |
|
44 |
{ |
|
45 |
const char *s1, *s2; |
|
46 |
const char *tptr; |
|
47 |
char c; |
|
48 |
||
49 |
s1 = as1; |
|
50 |
s2 = as2; |
|
51 |
||
52 |
if (s2 == NULL || *s2 == '\0') |
|
53 |
return ((char *)s1); |
|
13105
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
54 |
|
0 | 55 |
c = *s2; |
13105
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
56 |
while (*s1 != '\0') { |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
57 |
if (c == *s1++) { |
0 | 58 |
tptr = s1; |
13105
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
59 |
while ((c = *++s2) == *s1++ && c != '\0') |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
60 |
continue; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
61 |
if (c == '\0') |
0 | 62 |
return ((char *)tptr - 1); |
63 |
s1 = tptr; |
|
64 |
s2 = as2; |
|
65 |
c = *s2; |
|
66 |
} |
|
13105
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
67 |
} |
0 | 68 |
|
69 |
return (NULL); |
|
70 |
} |
|
13105
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
71 |
|
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
72 |
/* |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
73 |
* strnstr() locates the first occurrence in the string as1 of |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
74 |
* the sequence of characters (excluding the terminating null |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
75 |
* character) in the string as2, where not more than n characters |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
76 |
* from the string as1 are searched. strnstr() returns a pointer |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
77 |
* to the located string, or a null pointer if the string is |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
78 |
* not found. If as2 is empty, the function returns as1. |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
79 |
*/ |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
80 |
|
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
81 |
char * |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
82 |
strnstr(const char *as1, const char *as2, size_t n) |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
83 |
{ |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
84 |
const char *s1, *s2; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
85 |
const char *tptr; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
86 |
size_t k; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
87 |
char c; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
88 |
|
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
89 |
s1 = as1; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
90 |
s2 = as2; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
91 |
|
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
92 |
if (s2 == NULL || *s2 == '\0') |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
93 |
return ((char *)s1); |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
94 |
|
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
95 |
c = *s2; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
96 |
while (*s1 != '\0' && n--) { |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
97 |
if (c == *s1++) { |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
98 |
k = n; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
99 |
tptr = s1; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
100 |
while ((c = *++s2) == *s1++ && c != '\0' && k--) |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
101 |
continue; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
102 |
if (c == '\0') |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
103 |
return ((char *)tptr - 1); |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
104 |
s1 = tptr; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
105 |
s2 = as2; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
106 |
c = *s2; |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
107 |
} |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
108 |
} |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
109 |
|
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
110 |
return (NULL); |
48f2dbca79a2
PSARC 2010/299 GNU/Linux/BSD compatibility functions
Roger A. Faulkner <Roger.Faulkner@Oracle.COM>
parents:
6812
diff
changeset
|
111 |
} |