2aa62f2bc9
This set of three packages: AppPkg, StdLib, StdLibPrivateInternalFiles; contains the implementation of libraries based upon non-UEFI standards such as ISO/IEC-9899, the library portion of the C Language Standard, POSIX, etc. AppPkg contains applications that make use of the standard libraries defined in the StdLib Package. StdLib contains header (include) files and the implementations of the standard libraries. StdLibPrivateInternalFiles contains files for the exclusive use of the library implementations in StdLib. These files should never be directly referenced from applications or other code. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11600 6f19259b-4bc3-4df7-8a09-765794883524
130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/* $NetBSD: aliasname.c,v 1.2 2005/02/09 21:35:46 kleink Exp $ */
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/*-
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* Copyright (c)2002 YAMAMOTO Takashi,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <LibConfig.h>
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#include <sys/EfiCdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: aliasname.c,v 1.2 2005/02/09 21:35:46 kleink Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include "aliasname_local.h"
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__inline int __is_ws(char);
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__inline int __is_ws(char ch)
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{
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return (ch == ' ' || ch == '\t');
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}
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const char *
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__unaliasname(const char *dbname, const char *alias, void *buf, size_t bufsize)
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{
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FILE *fp = NULL;
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const char *result = alias;
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size_t resultlen;
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size_t aliaslen;
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const char *p;
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size_t len;
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_DIAGASSERT(dbname != NULL);
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_DIAGASSERT(alias != NULL);
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_DIAGASSERT(buf != NULL);
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fp = fopen(dbname, "r");
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if (fp == NULL)
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goto quit;
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aliaslen = strlen(alias);
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while (/*CONSTCOND*/ 1) {
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p = fgetln(fp, &len);
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if (p == NULL)
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goto quit; /* eof or error */
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_DIAGASSERT(len != 0);
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/* ignore terminating NL */
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if (p[len - 1] == '\n')
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len--;
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/* ignore null line and comment */
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if (len == 0 || p[0] == '#')
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continue;
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if (aliaslen > len)
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continue;
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if (memcmp(alias, p, aliaslen))
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continue;
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p += aliaslen;
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len -= aliaslen;
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if (len == 0 || !__is_ws(*p))
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continue;
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/* entry was found here */
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break;
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/* NOTREACHED */
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}
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/* skip white spaces */
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do {
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p++;
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len--;
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} while (len != 0 && __is_ws(*p));
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if (len == 0)
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goto quit;
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/* count length of result */
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resultlen = 0;
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while (resultlen < len && !__is_ws(*p))
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resultlen++;
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/* check if space is enough */
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if (bufsize < resultlen + 1)
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goto quit;
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memcpy(buf, p, resultlen);
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((char *)buf)[resultlen] = 0;
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result = buf;
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quit:
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if (fp)
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fclose(fp);
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return result;
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}
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