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523 lines
10 KiB
523 lines
10 KiB
/*** strlib.c - string functions
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*
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* Copyright (c) 1996,1997 Microsoft Corporation
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* Author: Michael Tsang (MikeTs)
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* Created 09/09/96
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*
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* MODIFICATION HISTORY
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*/
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#include "pch.h"
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#ifdef LOCKABLE_PRAGMA
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#pragma ACPI_LOCKABLE_DATA
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#pragma ACPI_LOCKABLE_CODE
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#endif
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/***EP StrLen - determine string length
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*
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* ENTRY
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* psz -> string
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* n - limiting length
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*
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* EXIT
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* returns string length
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*/
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ULONG EXPORT StrLen(PSZ psz, ULONG n)
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{
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TRACENAME("STRLEN")
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ULONG dwLen;
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ENTER(5, ("StrLen(str=%s,n=%d)\n", psz, n));
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ASSERT(psz != NULL);
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if (n != (ULONG)-1)
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n++;
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for (dwLen = 0; (dwLen <= n) && (*psz != '\0'); psz++)
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dwLen++;
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EXIT(5, ("StrLen=%u\n", dwLen));
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return dwLen;
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} //StrLen
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/***EP StrCpy - copy string
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*
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* ENTRY
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* pszDst -> destination string
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* pszSrc -> source string
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* n - number of bytes to copy
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*
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* EXIT
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* returns pszDst
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*/
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PSZ EXPORT StrCpy(PSZ pszDst, PSZ pszSrc, ULONG n)
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{
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TRACENAME("STRCPY")
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ULONG dwSrcLen;
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ENTER(5, ("StrCpy(Dst=%s,Src=%s,n=%d)\n", pszDst, pszSrc, n));
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ASSERT(pszDst != NULL);
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ASSERT(pszSrc != NULL);
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dwSrcLen = StrLen(pszSrc, n);
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if ((n == (ULONG)(-1)) || (n > dwSrcLen))
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n = dwSrcLen;
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MEMCPY(pszDst, pszSrc, n);
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pszDst[n] = '\0';
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EXIT(5, ("StrCpy=%s\n", pszDst));
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return pszDst;
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} //StrCpy
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/***EP StrCat - concatenate strings
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*
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* ENTRY
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* pszDst -> destination string
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* pszSrc -> source string
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* n - number of bytes to concatenate
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*
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* EXIT
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* returns pszDst
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*/
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PSZ EXPORT StrCat(PSZ pszDst, PSZ pszSrc, ULONG n)
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{
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TRACENAME("STRCAT")
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ULONG dwSrcLen, dwDstLen;
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ENTER(5, ("StrCat(Dst=%s,Src=%s,n=%d)\n", pszDst, pszSrc, n));
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ASSERT(pszDst != NULL);
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ASSERT(pszSrc != NULL);
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dwSrcLen = StrLen(pszSrc, n);
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if ((n == (ULONG)(-1)) || (n > dwSrcLen))
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n = dwSrcLen;
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dwDstLen = StrLen(pszDst, (ULONG)(-1));
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MEMCPY(&pszDst[dwDstLen], pszSrc, n);
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pszDst[dwDstLen + n] = '\0';
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EXIT(5, ("StrCat=%s\n", pszDst));
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return pszDst;
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} //StrCat
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/***EP StrCmp - compare strings
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*
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* ENTRY
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* psz1 -> string 1
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* psz2 -> string 2
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* n - number of bytes to compare
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* fMatchCase - TRUE if case sensitive
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*
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* EXIT
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* returns 0 if string 1 == string 2
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* <0 if string 1 < string 2
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* >0 if string 1 > string 2
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*/
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LONG EXPORT StrCmp(PSZ psz1, PSZ psz2, ULONG n, BOOLEAN fMatchCase)
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{
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TRACENAME("STRCMP")
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LONG rc;
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ULONG dwLen1, dwLen2;
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ULONG i;
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ENTER(5, ("StrCmp(s1=%s,s2=%s,n=%d,fMatchCase=%d)\n",
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psz1, psz2, n, fMatchCase));
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ASSERT(psz1 != NULL);
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ASSERT(psz2 != NULL);
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dwLen1 = StrLen(psz1, n);
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dwLen2 = StrLen(psz2, n);
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if (n == (ULONG)(-1))
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n = (dwLen1 > dwLen2)? dwLen1: dwLen2;
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if (fMatchCase)
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{
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for (i = 0, rc = 0;
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(rc == 0) && (i < n) && (i < dwLen1) && (i < dwLen2);
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++i)
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{
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rc = (LONG)(psz1[i] - psz2[i]);
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}
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}
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else
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{
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for (i = 0, rc = 0;
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(rc == 0) && (i < n) && (i < dwLen1) && (i < dwLen2);
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++i)
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{
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rc = (LONG)(TOUPPER(psz1[i]) - TOUPPER(psz2[i]));
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}
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}
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if ((rc == 0) && (i < n))
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{
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if (i < dwLen1)
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rc = (LONG)psz1[i];
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else if (i < dwLen2)
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rc = (LONG)(-psz2[i]);
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}
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EXIT(5, ("StrCmp=%d\n", rc));
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return rc;
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} //StrCmp
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/***EP StrChr - look for a character in a string
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*
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* ENTRY
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* psz -> string
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* c - character to look for
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*
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* EXIT-SUCCESS
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* returns a pointer to the character found
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* EXIT-FAILURE
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* returns NULL
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*/
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PSZ EXPORT StrChr(PSZ pszStr, CHAR c)
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{
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TRACENAME("STRCHR")
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PSZ psz;
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ENTER(5, ("StrChr(s=%s,c=%c)\n", pszStr, c));
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ASSERT(pszStr != NULL);
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for (psz = pszStr; (*psz != c) && (*psz != '\0'); psz++)
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;
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if (*psz != c)
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psz = NULL;
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EXIT(5, ("StrChr=%x\n", psz));
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return psz;
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} //StrChr
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/***EP StrRChr - look for a character in a string in reverse direction
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*
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* ENTRY
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* psz -> string
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* c - character to look for
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*
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* EXIT-SUCCESS
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* returns a pointer to the character found
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* EXIT-FAILURE
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* returns NULL
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*/
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PSZ EXPORT StrRChr(PSZ pszStr, CHAR c)
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{
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TRACENAME("STRRCHR")
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PSZ psz;
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ENTER(5, ("StrChr(s=%s,c=%c)\n", pszStr, c));
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ASSERT(pszStr != NULL);
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for (psz = &pszStr[StrLen(pszStr, (ULONG)-1)];
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(*psz != c) && (psz > pszStr);
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psz--)
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{
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}
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if (*psz != c)
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psz = NULL;
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EXIT(5, ("StrRChr=%x\n", psz));
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return psz;
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} //StrRChr
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/***EP StrTok - find the next token in string
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*
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* ENTRY
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* pszStr -> string containing tokens
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* pszSep -> string containing delimiters
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*
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* EXIT-SUCCESS
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* returns the pointer to the beginning of the token
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* EXIT-FAILURE
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* returns NULL
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*/
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PSZ EXPORT StrTok(PSZ pszStr, PSZ pszSep)
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{
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TRACENAME("STRTOK")
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static PSZ pszNext = NULL;
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ENTER(5, ("StrTok(Str=%s,Sep=%s)\n", pszStr, pszSep));
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ASSERT(pszSep != NULL);
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if (pszStr == NULL)
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pszStr = pszNext;
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if (pszStr != NULL)
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{
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//
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// Skip leading delimiter characters
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//
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while ((*pszStr != '\0') && (StrChr(pszSep, *pszStr) != NULL))
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pszStr++;
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for (pszNext = pszStr;
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(*pszNext != '\0') && (StrChr(pszSep, *pszNext) == NULL);
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pszNext++)
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;
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if (*pszStr == '\0')
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pszStr = NULL;
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else if (*pszNext != '\0')
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{
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*pszNext = '\0';
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pszNext++;
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}
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}
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EXIT(5, ("StrTok=%s (Next=%s)\n",
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pszStr? pszStr: "(null)", pszNext? pszNext: "(null)"));
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return pszStr;
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} //StrTok
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/***EP StrToUL - convert the number in a string to a unsigned long integer
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*
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* ENTRY
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* psz -> string
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* ppszEnd -> string pointer to the end of the number (can be NULL)
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* dwBase - the base of the number (if 0, auto-detect base)
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*
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* EXIT
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* returns the converted number
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*/
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ULONG EXPORT StrToUL(PSZ psz, PSZ *ppszEnd, ULONG dwBase)
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{
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TRACENAME("STRTOUL")
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ULONG n = 0;
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ULONG m;
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ENTER(5, ("StrToUL(Str=%s,ppszEnd=%x,Base=%x)\n", psz, ppszEnd, dwBase));
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if (dwBase == 0)
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{
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if (psz[0] == '0')
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{
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if ((psz[1] == 'x') || (psz[1] == 'X'))
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{
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dwBase = 16;
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psz += 2;
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}
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else
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{
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dwBase = 8;
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psz++;
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}
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}
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else
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dwBase = 10;
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}
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while (*psz != '\0')
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{
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if ((*psz >= '0') && (*psz <= '9'))
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m = *psz - '0';
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else if ((*psz >= 'A') && (*psz <= 'Z'))
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m = *psz - 'A' + 10;
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else if ((*psz >= 'a') && (*psz <= 'z'))
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m = *psz - 'a' + 10;
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else
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break;
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if (m < dwBase)
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{
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n = (n*dwBase) + m;
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psz++;
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}
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else
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break;
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}
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if (ppszEnd != NULL)
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*ppszEnd = psz;
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EXIT(5, ("StrToUL=%x (pszEnd=%x)\n", n, ppszEnd? *ppszEnd: 0));
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return n;
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} //StrToUL
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/***EP StrToL - convert the number in a string to a long integer
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*
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* ENTRY
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* psz -> string
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* ppszEnd -> string pointer to the end of the number (can be NULL)
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* dwBase - the base of the number (if 0, auto-detect base)
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*
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* EXIT
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* returns the converted number
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*/
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LONG EXPORT StrToL(PSZ psz, PSZ *ppszEnd, ULONG dwBase)
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{
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TRACENAME("STRTOL")
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LONG n = 0;
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BOOLEAN fMinus;
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ENTER(5, ("StrToL(Str=%s,ppszEnd=%x,Base=%x)\n", psz, ppszEnd, dwBase));
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if (*psz == '-')
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{
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fMinus = TRUE;
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psz++;
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}
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else
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fMinus = FALSE;
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n = (LONG)StrToUL(psz, ppszEnd, dwBase);
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if (fMinus)
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n = -n;
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EXIT(5, ("StrToL=%x (pszEnd=%x)\n", n, ppszEnd? *ppszEnd: 0));
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return n;
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} //StrToL
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/***EP StrStr - find a substring in a given string
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*
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* ENTRY
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* psz1 -> string to be searched
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* psz2 -> substring to find
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*
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* EXIT-SUCCESS
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* returns pointer to psz1 where the substring is found
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* EXIT-FAILURE
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* returns NULL
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*/
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PSZ EXPORT StrStr(PSZ psz1, PSZ psz2)
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{
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TRACENAME("STRSTR")
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PSZ psz = psz1;
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ULONG dwLen;
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ENTER(5, ("StrStr(psz1=%s,psz2=%s)\n", psz1, psz2));
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dwLen = StrLen(psz2, (ULONG)-1);
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while ((psz = StrChr(psz, *psz2)) != NULL)
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{
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if (StrCmp(psz, psz2, dwLen, TRUE) == 0)
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break;
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else
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psz++;
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}
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EXIT(5, ("StrStr=%s\n", psz));
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return psz;
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} //StrStr
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/***EP StrUpr - convert string to upper case
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*
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* ENTRY
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* pszStr -> string
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*
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* EXIT
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* returns pszStr
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*/
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PSZ EXPORT StrUpr(PSZ pszStr)
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{
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TRACENAME("STRUPR")
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PSZ psz;
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ENTER(5, ("StrUpr(Str=%s)\n", pszStr));
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for (psz = pszStr; *psz != '\0'; psz++)
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{
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*psz = TOUPPER(*psz);
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}
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EXIT(5, ("StrUpr=%s\n", pszStr));
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return pszStr;
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} //StrUpr
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/***EP StrLwr - convert string to lower case
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*
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* ENTRY
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* pszStr -> string
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*
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* EXIT
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* returns pszStr
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*/
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PSZ EXPORT StrLwr(PSZ pszStr)
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{
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TRACENAME("STRLWR")
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PSZ psz;
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ENTER(5, ("StrLwr(Str=%s)\n", pszStr));
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for (psz = pszStr; *psz != '\0'; psz++)
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{
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*psz = TOLOWER(*psz);
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}
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EXIT(5, ("StrLwr=%s\n", pszStr));
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return pszStr;
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} //StrLwr
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/***EP UlToA - convert an unsigned long value to a string
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*
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* ENTRY
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* dwValue - data
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* pszStr -> string
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* dwRadix - radix
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*
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* EXIT
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* returns pszStr
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*/
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PSZ EXPORT UlToA(ULONG dwValue, PSZ pszStr, ULONG dwRadix)
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{
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TRACENAME("ULTOA")
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PSZ psz;
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char ch;
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ENTER(5, ("UlToA(Value=%x,pszStr=%x,Radix=%d\n", dwValue, pszStr, dwRadix));
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for (psz = pszStr; dwValue != 0; dwValue/=dwRadix, psz++)
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{
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ch = (char)(dwValue%dwRadix);
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if (ch <= 9)
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{
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*psz = (char)(ch + '0');
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}
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else
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{
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*psz = (char)(ch - 10 + 'A');
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}
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}
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if (psz == pszStr)
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{
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pszStr[0] = '0';
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pszStr[1] = '\0';
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}
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else
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{
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PSZ psz2;
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*psz = '\0';
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for (psz2 = pszStr, psz--; psz2 < psz; psz2++, psz--)
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{
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ch = *psz2;
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*psz2 = *psz;
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*psz = ch;
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}
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}
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EXIT(5, ("UlToA=%s\n", pszStr));
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return pszStr;
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} //UlToA
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