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comparison packages/language/c/libc/current/src/string/strxfrm.cxx @ 0:3111d98ba7b3 ecos-v1_1-release

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Initial commit of eCos version 1.1
author jlarmour
date Tue, 11 May 1999 11:16:07 +0000
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children 443894e2e912
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-1:000000000000 0:3111d98ba7b3
1 //===========================================================================
2 //
3 // strxfrm.cxx
4 //
5 // ANSI standard strxfrm() routine
6 //
7 //===========================================================================
8 //####COPYRIGHTBEGIN####
9 //
10 // -------------------------------------------
11 // The contents of this file are subject to the Cygnus eCos Public License
12 // Version 1.0 (the "License"); you may not use this file except in
13 // compliance with the License. You may obtain a copy of the License at
14 // http://sourceware.cygnus.com/ecos
15 //
16 // Software distributed under the License is distributed on an "AS IS"
17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
18 // License for the specific language governing rights and limitations under
19 // the License.
20 //
21 // The Original Code is eCos - Embedded Cygnus Operating System, released
22 // September 30, 1998.
23 //
24 // The Initial Developer of the Original Code is Cygnus. Portions created
25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved.
26 // -------------------------------------------
27 //
28 //####COPYRIGHTEND####
29 //===========================================================================
30 //#####DESCRIPTIONBEGIN####
31 //
32 // Author(s): jlarmour
33 // Contributors: jlarmour@cygnus.co.uk
34 // Date: 1998-02-13
35 // Purpose:
36 // Description:
37 // Usage:
38 //
39 //####DESCRIPTIONEND####
40 //
41 //===========================================================================
42
43 // CONFIGURATION
44
45 #include <pkgconf/libc.h> // Configuration header
46
47 // Include the C library?
48 #ifdef CYGPKG_LIBC
49
50 // INCLUDES
51
52 #include <cyg/infra/cyg_type.h> // Common type definitions
53 #include <cyg/infra/cyg_trac.h> // Tracing support
54 #include <cyg/infra/cyg_ass.h> // Assertion support
55 #include <string.h> // Header for this file
56 #include <stddef.h> // Compiler definitions such as size_t, NULL etc.
57 #include "clibincl/stringsupp.hxx" // Useful string function support and
58 // prototypes
59
60 // EXPORTED SYMBOLS
61
62 externC size_t
63 strxfrm( char *s1, const char *s2, size_t n ) \
64 CYGPRI_LIBC_WEAK_ALIAS("_strxfrm");
65
66 // FUNCTIONS
67
68 size_t
69 _strxfrm( char *s1, const char *s2, size_t n )
70 {
71 size_t res = 0;
72
73 CYG_REPORT_FUNCNAMETYPE( "_strxfrm", "returning size %d" );
74 CYG_REPORT_FUNCARG3( "s1=%08x, s2=%08x, n=%d", s1, s2, n );
75
76 if (s1 != NULL)
77 CYG_CHECK_DATA_PTR( s1, "s1 is not a valid pointer!" );
78 CYG_CHECK_DATA_PTR( s2, "s2 is not a valid pointer!" );
79
80 while (n-- > 0)
81 {
82 if ((*s1++ = *s2++) != '\0')
83 ++res;
84 else
85 {
86 CYG_REPORT_RETVAL( res );
87 return res;
88 } // else
89 } // while
90
91 while (*s2)
92 {
93 ++s2;
94 ++res;
95 } // while
96
97 CYG_REPORT_RETVAL( res );
98
99 return res;
100 } // _strxfrm()
101
102 #endif // ifdef CYGPKG_LIBC
103
104 // EOF strxfrm.cxx