| /* |
| ****************************************************************************** |
| * |
| * Copyright (C) 1997-2003, 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 "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 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 |
| T_CString_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 |
| T_CString_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; |
| } |
