diff options
Diffstat (limited to 'vendor/icu/src/cstring.cpp')
| -rw-r--r-- | vendor/icu/src/cstring.cpp | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/vendor/icu/src/cstring.cpp b/vendor/icu/src/cstring.cpp new file mode 100644 index 0000000000..79a62c8d0e --- /dev/null +++ b/vendor/icu/src/cstring.cpp @@ -0,0 +1,341 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +****************************************************************************** +* +* 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; +} |