The Tor Browser: intl/icu/source/common/cstring.c@b8a032363ba2 (annotated)

intl/icu/source/common/cstring.c@b8a032363ba2 (annotated)

intl/icu/source/common/cstring.c

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
 ******************************************************************************
 *
 *   Copyright (C) 1997-2011, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 ******************************************************************************
 *
 * File CSTRING.C
 *
 * @author       Helena Shih
 *
 * Modification History:
 *
 *   Date        Name        Description
 *   6/18/98     hshih       Created
 *   09/08/98    stephen     Added include for ctype, for Mac Port
 *   11/15/99    helena      Integrated S/390 IEEE changes.
 ******************************************************************************
 */
 #include <stdlib.h>
 #include <stdio.h>
 #include "unicode/utypes.h"
 #include "cmemory.h"
 #include "cstring.h"
 #include "uassert.h"
 /*
  * We hardcode case conversion for invariant characters to match our expectation
  * and the compiler execution charset.
  * This prevents problems on systems
  * - with non-default casing behavior, like Turkish system locales where
  *   tolower('I') maps to dotless i and toupper('i') maps to dotted I
  * - where there are no lowercase Latin characters at all, or using different
  *   codes (some old EBCDIC codepages)
  *
  * This works because the compiler usually runs on a platform where the execution
  * charset includes all of the invariant characters at their expected
  * code positions, so that the char * string literals in ICU code match
  * the char literals here.
  *
  * Note that the set of lowercase Latin letters is discontiguous in EBCDIC
  * and the set of uppercase Latin letters is discontiguous as well.
  */
 U_CAPI UBool U_EXPORT2
 uprv_isASCIILetter(char c) {
 #if U_CHARSET_FAMILY==U_EBCDIC_FAMILY
     return
         ('a'<=c && c<='i') || ('j'<=c && c<='r') || ('s'<=c && c<='z') ||
         ('A'<=c && c<='I') || ('J'<=c && c<='R') || ('S'<=c && c<='Z');
 #else
     return ('a'<=c && c<='z') || ('A'<=c && c<='Z');
 #endif
 }
 U_CAPI char U_EXPORT2
 uprv_toupper(char c) {
 #if U_CHARSET_FAMILY==U_EBCDIC_FAMILY
     if(('a'<=c && c<='i') || ('j'<=c && c<='r') || ('s'<=c && c<='z')) {
         c=(char)(c+('A'-'a'));
     }
 #else
     if('a'<=c && c<='z') {
         c=(char)(c+('A'-'a'));
     }
 #endif
     return c;
 }
 #if 0
 /*
  * Commented out because cstring.h defines uprv_tolower() to be
  * the same as either uprv_asciitolower() or uprv_ebcdictolower()
  * to reduce the amount of code to cover with tests.
  *
  * Note that this uprv_tolower() definition is likely to work for most
  * charset families, not just ASCII and EBCDIC, because its #else branch
  * is written generically.
  */
 U_CAPI char U_EXPORT2
 uprv_tolower(char c) {
 #if U_CHARSET_FAMILY==U_EBCDIC_FAMILY
     if(('A'<=c && c<='I') || ('J'<=c && c<='R') || ('S'<=c && c<='Z')) {
         c=(char)(c+('a'-'A'));
     }
 #else
     if('A'<=c && c<='Z') {
         c=(char)(c+('a'-'A'));
     }
 #endif
     return c;
 }
 #endif
 U_CAPI char U_EXPORT2
 uprv_asciitolower(char c) {
     if(0x41<=c && c<=0x5a) {
         c=(char)(c+0x20);
     }
     return c;
 }
 U_CAPI char U_EXPORT2
 uprv_ebcdictolower(char c) {
     if( (0xc1<=(uint8_t)c && (uint8_t)c<=0xc9) ||
         (0xd1<=(uint8_t)c && (uint8_t)c<=0xd9) ||
         (0xe2<=(uint8_t)c && (uint8_t)c<=0xe9)
     ) {
         c=(char)(c-0x40);
     }
     return c;
 }
 U_CAPI char* U_EXPORT2
 T_CString_toLowerCase(char* str)
 {
     char* origPtr = str;
     if (str) {
         do
             *str = (char)uprv_tolower(*str);
         while (*(str++));
     }
     return origPtr;
 }
 U_CAPI char* U_EXPORT2
 T_CString_toUpperCase(char* str)
 {
     char* origPtr = str;
     if (str) {
         do
             *str = (char)uprv_toupper(*str);
         while (*(str++));
     }
     return origPtr;
 }
 /*
  * Takes a int32_t and fills in  a char* string with that number "radix"-based.
  * Does not handle negative values (makes an empty string for them).
  * Writes at most 12 chars ("-2147483647" plus NUL).
  * Returns the length of the string (not including the NUL).
  */
 U_CAPI int32_t U_EXPORT2
 T_CString_integerToString(char* buffer, int32_t v, int32_t radix)
 {
     char      tbuf[30];
     int32_t   tbx    = sizeof(tbuf);
     uint8_t   digit;
     int32_t   length = 0;
     uint32_t  uval;
     U_ASSERT(radix>=2 && radix<=16);
     uval = (uint32_t) v;
     if(v<0 && radix == 10) {
         /* Only in base 10 do we conside numbers to be signed. */
         uval = (uint32_t)(-v);
         buffer[length++] = '-';
     }
     tbx = sizeof(tbuf)-1;
     tbuf[tbx] = 0;   /* We are generating the digits backwards.  Null term the end. */
     do {
         digit = (uint8_t)(uval % radix);
         tbuf[--tbx] = (char)(T_CString_itosOffset(digit));
         uval  = uval / radix;
     } while (uval != 0);
     /* copy converted number into user buffer  */
     uprv_strcpy(buffer+length, tbuf+tbx);
     length += sizeof(tbuf) - tbx -1;
     return length;
 }
 /*
  * Takes a int64_t and fills in  a char* string with that number "radix"-based.
  * Writes at most 21: chars ("-9223372036854775807" plus NUL).
  * Returns the length of the string, not including the terminating NULL.
  */
 U_CAPI int32_t U_EXPORT2
 T_CString_int64ToString(char* buffer, int64_t v, uint32_t radix)
 {
     char      tbuf[30];
     int32_t   tbx    = sizeof(tbuf);
     uint8_t   digit;
     int32_t   length = 0;
     uint64_t  uval;
     U_ASSERT(radix>=2 && radix<=16);
     uval = (uint64_t) v;
     if(v<0 && radix == 10) {
         /* Only in base 10 do we conside numbers to be signed. */
         uval = (uint64_t)(-v);
         buffer[length++] = '-';
     }
     tbx = sizeof(tbuf)-1;
     tbuf[tbx] = 0;   /* We are generating the digits backwards.  Null term the end. */
     do {
         digit = (uint8_t)(uval % radix);
         tbuf[--tbx] = (char)(T_CString_itosOffset(digit));
         uval  = uval / radix;
     } while (uval != 0);
     /* copy converted number into user buffer  */
     uprv_strcpy(buffer+length, tbuf+tbx);
     length += sizeof(tbuf) - tbx -1;
     return length;
 }
 U_CAPI int32_t U_EXPORT2
 T_CString_stringToInteger(const char *integerString, int32_t radix)
 {
     char *end;
     return uprv_strtoul(integerString, &end, radix);
 }
 U_CAPI int U_EXPORT2
 uprv_stricmp(const char *str1, const char *str2) {
     if(str1==NULL) {
         if(str2==NULL) {
             return 0;
         } else {
             return -1;
         }
     } else if(str2==NULL) {
         return 1;
     } else {
         /* compare non-NULL strings lexically with lowercase */
         int rc;
         unsigned char c1, c2;
         for(;;) {
             c1=(unsigned char)*str1;
             c2=(unsigned char)*str2;
             if(c1==0) {
                 if(c2==0) {
                     return 0;
                 } else {
                     return -1;
                 }
             } else if(c2==0) {
                 return 1;
             } else {
                 /* compare non-zero characters with lowercase */
                 rc=(int)(unsigned char)uprv_tolower(c1)-(int)(unsigned char)uprv_tolower(c2);
                 if(rc!=0) {
                     return rc;
                 }
             }
             ++str1;
             ++str2;
         }
     }
 }
 U_CAPI int U_EXPORT2
 uprv_strnicmp(const char *str1, const char *str2, uint32_t n) {
     if(str1==NULL) {
         if(str2==NULL) {
             return 0;
         } else {
             return -1;
         }
     } else if(str2==NULL) {
         return 1;
     } else {
         /* compare non-NULL strings lexically with lowercase */
         int rc;
         unsigned char c1, c2;
         for(; n--;) {
             c1=(unsigned char)*str1;
             c2=(unsigned char)*str2;
             if(c1==0) {
                 if(c2==0) {
                     return 0;
                 } else {
                     return -1;
                 }
             } else if(c2==0) {
                 return 1;
             } else {
                 /* compare non-zero characters with lowercase */
                 rc=(int)(unsigned char)uprv_tolower(c1)-(int)(unsigned char)uprv_tolower(c2);
                 if(rc!=0) {
                     return rc;
                 }
             }
             ++str1;
             ++str2;
         }
     }
     return 0;
 }
 U_CAPI char* U_EXPORT2
 uprv_strdup(const char *src) {
     size_t len = uprv_strlen(src) + 1;
     char *dup = (char *) uprv_malloc(len);
     if (dup) {
         uprv_memcpy(dup, src, len);
     }
     return dup;
 }
 U_CAPI char* U_EXPORT2
 uprv_strndup(const char *src, int32_t n) {
     char *dup;
     if(n < 0) {
         dup = uprv_strdup(src);
     } else {
         dup = (char*)uprv_malloc(n+1);
         if (dup) {
             uprv_memcpy(dup, src, n);
             dup[n] = 0;
         }
     }
     return dup;
 }

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intl/icu/source/common/cstring.c@b8a032363ba2 (annotated)

intl/icu/source/common/cstring.c