| 1 | /** @file
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| 2 | Miscellaneous Functions for <string.h>.
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| 3 |
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| 4 | Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
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| 5 | This program and the accompanying materials are licensed and made available under
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| 6 | the terms and conditions of the BSD License that accompanies this distribution.
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| 7 | The full text of the license may be found at
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| 8 | http://opensource.org/licenses/bsd-license.php.
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| 9 |
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| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 12 | **/
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| 13 | //#include <sys/EfiCdefs.h>
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| 14 |
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| 15 | #include <Uefi.h>
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| 16 | #include <Library/BaseLib.h>
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| 17 | #include <Library/BaseMemoryLib.h>
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| 18 | #include <Library/PcdLib.h>
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| 19 | #include <Library/PrintLib.h>
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| 20 |
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| 21 | #include <LibConfig.h>
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| 22 |
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| 23 | #include <errno.h>
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| 24 | #include <limits.h>
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| 25 | #include <string.h>
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| 26 |
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| 27 | extern char *sys_errlist[];
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| 28 |
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| 29 | /** The memset function copies the value of c (converted to an unsigned char)
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| 30 | into each of the first n characters of the object pointed to by s.
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| 31 |
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| 32 | @return The memset function returns the value of s.
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| 33 | **/
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| 34 | void *
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| 35 | memset(void *s, int c, size_t n)
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| 36 | {
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| 37 | return SetMem( s, (UINTN)n, (UINT8)c);
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| 38 | }
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| 39 |
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| 40 | int
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| 41 | strerror_r(int errnum, char *buf, size_t buflen)
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| 42 | {
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| 43 | const char *estring;
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| 44 | INTN i;
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| 45 | int retval = 0;
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| 46 |
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| 47 | if( (errnum < 0) || (errnum >= EMAXERRORVAL)) {
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| 48 | (void) AsciiSPrint( buf, ASCII_STRING_MAX, "Unknown Error: %d.", errnum);
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| 49 | retval = EINVAL;
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| 50 | }
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| 51 | else {
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| 52 | estring = sys_errlist[errnum];
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| 53 | for( i = buflen; i > 0; --i) {
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| 54 | if( (*buf++ = *estring++) == '\0') {
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| 55 | break;
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| 56 | }
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| 57 | }
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| 58 | if(i == 0) {
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| 59 | retval = ERANGE;
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| 60 | }
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| 61 | }
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| 62 | return retval;
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| 63 | }
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| 64 |
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| 65 | /** The strerror function maps the number in errnum to a message string.
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| 66 | Typically, the values for errnum come from errno, but strerror shall map
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| 67 | any value of type int to a message.
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| 68 |
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| 69 | The implementation shall behave as if no library function calls the
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| 70 | strerror function.
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| 71 |
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| 72 | @return The strerror function returns a pointer to the string, the
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| 73 | contents of which are locale specific. The array pointed to
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| 74 | shall not be modified by the program, but may be overwritten by
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| 75 | a subsequent call to the strerror function.
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| 76 | **/
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| 77 | char *
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| 78 | strerror(int errnum)
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| 79 | {
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| 80 | static char errorbuf[ASCII_STRING_MAX];
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| 81 | int status;
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| 82 |
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| 83 | status = strerror_r(errnum, errorbuf, sizeof(errorbuf));
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| 84 | if(status != 0) {
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| 85 | errno = status;
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| 86 | }
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| 87 | return errorbuf;
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| 88 | }
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| 89 |
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| 90 | /** The strlen function computes the length of the string pointed to by s.
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| 91 |
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| 92 | @return The strlen function returns the number of characters that
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| 93 | precede the terminating null character.
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| 94 | **/
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| 95 | size_t
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| 96 | strlen(const char *s)
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| 97 | {
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| 98 | return (size_t)AsciiStrLen( s);
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| 99 | }
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