#include "unicode/utf.h"
Go to the source code of this file.
Defines | |
| #define | UTF8_COUNT_TRAIL_BYTES(leadByte) (utf8_countTrailBytes[(uint8_t)leadByte]) |
| #define | UTF8_MASK_LEAD_BYTE(leadByte, countTrailBytes) ((leadByte)&=(1<<(6-(countTrailBytes)))-1) |
| #define | UTF8_IS_SINGLE(uchar) (((uchar)&0x80)==0) |
| #define | UTF8_IS_LEAD(uchar) ((uint8_t)((uchar)-0xc0)<0x3e) |
| #define | UTF8_IS_TRAIL(uchar) (((uchar)&0xc0)==0x80) |
| #define | UTF8_NEED_MULTIPLE_UCHAR(c) ((uint32_t)(c)>0x7f) |
| #define | UTF8_CHAR_LENGTH(c) |
| #define | UTF8_MAX_CHAR_LENGTH 4 |
| #define | UTF8_ARRAY_SIZE(size) ((5*(size))/2) |
| #define | UTF8_GET_CHAR_UNSAFE(s, i, c) |
| #define | UTF8_GET_CHAR_SAFE(s, start, i, length, c, strict) |
| #define | UTF8_NEXT_CHAR_UNSAFE(s, i, c) |
| #define | UTF8_APPEND_CHAR_UNSAFE(s, i, c) |
| #define | UTF8_FWD_1_UNSAFE(s, i) |
| #define | UTF8_FWD_N_UNSAFE(s, i, n) |
| #define | UTF8_SET_CHAR_START_UNSAFE(s, i) |
| #define | UTF8_NEXT_CHAR_SAFE(s, i, length, c, strict) |
| #define | UTF8_APPEND_CHAR_SAFE(s, i, length, c) |
| #define | UTF8_FWD_1_SAFE(s, i, length) |
| #define | UTF8_FWD_N_SAFE(s, i, length, n) |
| #define | UTF8_SET_CHAR_START_SAFE(s, start, i) |
| #define | UTF8_PREV_CHAR_UNSAFE(s, i, c) |
| #define | UTF8_BACK_1_UNSAFE(s, i) |
| #define | UTF8_BACK_N_UNSAFE(s, i, n) |
| #define | UTF8_SET_CHAR_LIMIT_UNSAFE(s, i) |
| #define | UTF8_PREV_CHAR_SAFE(s, start, i, c, strict) |
| #define | UTF8_BACK_1_SAFE(s, start, i) |
| #define | UTF8_BACK_N_SAFE(s, start, i, n) |
| #define | UTF8_SET_CHAR_LIMIT_SAFE(s, start, i, length) |
Functions | |
| U_CAPI UChar32 U_EXPORT2 | utf8_nextCharSafeBody (const uint8_t *s, int32_t *pi, int32_t length, UChar32 c, UBool strict) |
| U_CAPI int32_t U_EXPORT2 | utf8_appendCharSafeBody (uint8_t *s, int32_t i, int32_t length, UChar32 c) |
| U_CAPI UChar32 U_EXPORT2 | utf8_prevCharSafeBody (const uint8_t *s, int32_t start, int32_t *pi, UChar32 c, UBool strict) |
| U_CAPI int32_t U_EXPORT2 | utf8_back1SafeBody (const uint8_t *s, int32_t start, int32_t i) |
Variables | |
| U_CFUNC const uint8_t U_IMPORT | utf8_countTrailBytes [256] |
This file defines macros to deal with UTF-8 code units and code points. Signatures and semantics are the same as for the similarly named macros in utf16.h. utf8.h is included by utf.h after unicode/umachine.h and some common definitions.
Usage: ICU coding guidelines for if() statements should be followed when using these macros. Compound statements (curly braces {}) must be used for if-else-while... bodies and all macro statements should be terminated with semicolon.
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Value: { \
if((uint32_t)(c)<=0x7f) { \
(s)[(i)++]=(uint8_t)(c); \
} else { \
(i)=utf8_appendCharSafeBody(s, (int32_t)(i), (int32_t)(length), c); \
} \
}
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Value: { \
if((uint32_t)(c)<=0x7f) { \
(s)[(i)++]=(uint8_t)(c); \
} else { \
if((uint32_t)(c)<=0x7ff) { \
(s)[(i)++]=(uint8_t)(((c)>>6)|0xc0); \
} else { \
if((uint32_t)(c)<=0xffff) { \
(s)[(i)++]=(uint8_t)(((c)>>12)|0xe0); \
} else { \
(s)[(i)++]=(uint8_t)(((c)>>18)|0xf0); \
(s)[(i)++]=(uint8_t)((((c)>>12)&0x3f)|0x80); \
} \
(s)[(i)++]=(uint8_t)((((c)>>6)&0x3f)|0x80); \
} \
(s)[(i)++]=(uint8_t)(((c)&0x3f)|0x80); \
} \
}
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Value: { \
if(UTF8_IS_TRAIL((s)[--(i)])) { \
(i)=utf8_back1SafeBody(s, start, (int32_t)(i)); \
} \
}
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Value: { \
while(UTF8_IS_TRAIL((s)[--(i)])) {} \
}
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Value: { \
int32_t __N=(n); \
while(__N>0 && (i)>(start)) { \
UTF8_BACK_1_SAFE(s, start, i); \
--__N; \
} \
}
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Value: { \
int32_t __N=(n); \
while(__N>0) { \
UTF8_BACK_1_UNSAFE(s, i); \
--__N; \
} \
}
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Value: ((uint32_t)(c)<=0x7f ? 1 : \
((uint32_t)(c)<=0x7ff ? 2 : \
((uint32_t)((c)-0x10000)>0xfffff ? 3 : 4) \
) \
)
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Value: { \
uint8_t __b=(s)[(i)++]; \
if(UTF8_IS_LEAD(__b)) { \
uint8_t __count=UTF8_COUNT_TRAIL_BYTES(__b); \
if((i)+__count>(length)) { \
__count=(uint8_t)((length)-(i)); \
} \
while(__count>0 && UTF8_IS_TRAIL((s)[i])) { \
++(i); \
--__count; \
} \
} \
}
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Value: { \
(i)+=1+UTF8_COUNT_TRAIL_BYTES((s)[i]); \
}
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Value: { \
int32_t __N=(n); \
while(__N>0 && (i)<(length)) { \
UTF8_FWD_1_SAFE(s, i, length); \
--__N; \
} \
}
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Value: { \
int32_t __N=(n); \
while(__N>0) { \
UTF8_FWD_1_UNSAFE(s, i); \
--__N; \
} \
}
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Value: { \
int32_t __I=(int32_t)(i); \
UTF8_SET_CHAR_START_SAFE(s, start, __I); \
UTF8_NEXT_CHAR_SAFE(s, __I, length, c, strict); \
}
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Value: { \
int32_t __I=(int32_t)(i); \
UTF8_SET_CHAR_START_UNSAFE(s, __I); \
UTF8_NEXT_CHAR_UNSAFE(s, __I, c); \
}
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Value: { \
(c)=(s)[(i)++]; \
if((c)>=0x80) { \
if(UTF8_IS_LEAD(c)) { \
(c)=utf8_nextCharSafeBody(s, &(i), (int32_t)(length), c, strict); \
} else { \
(c)=UTF8_ERROR_VALUE_1; \
} \
} \
}
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Value: { \
(c)=(s)[(i)++]; \
if((uint8_t)((c)-0xc0)<0x35) { \
uint8_t __count=UTF8_COUNT_TRAIL_BYTES(c); \
UTF8_MASK_LEAD_BYTE(c, __count); \
switch(__count) { \
/* each following branch falls through to the next one */ \
case 3: \
(c)=((c)<<6)|((s)[(i)++]&0x3f); \
case 2: \
(c)=((c)<<6)|((s)[(i)++]&0x3f); \
case 1: \
(c)=((c)<<6)|((s)[(i)++]&0x3f); \
/* no other branches to optimize switch() */ \
break; \
} \
} \
}
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Value: { \
(c)=(s)[--(i)]; \
if((c)>=0x80) { \
if((c)<=0xbf) { \
(c)=utf8_prevCharSafeBody(s, start, &(i), c, strict); \
} else { \
(c)=UTF8_ERROR_VALUE_1; \
} \
} \
}
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Value: { \
(c)=(s)[--(i)]; \
if(UTF8_IS_TRAIL(c)) { \
uint8_t __b, __count=1, __shift=6; \
\
/* c is a trail byte */ \
(c)&=0x3f; \
for(;;) { \
__b=(s)[--(i)]; \
if(__b>=0xc0) { \
UTF8_MASK_LEAD_BYTE(__b, __count); \
(c)|=(UChar32)__b<<__shift; \
break; \
} else { \
(c)|=(UChar32)(__b&0x3f)<<__shift; \
++__count; \
__shift+=6; \
} \
} \
} \
}
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Value: { \
if((start)<(i) && (i)<(length)) { \
UTF8_BACK_1_SAFE(s, start, i); \
UTF8_FWD_1_SAFE(s, i, length); \
} \
}
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Value: { \
UTF8_BACK_1_UNSAFE(s, i); \
UTF8_FWD_1_UNSAFE(s, i); \
}
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Value: { \
if(UTF8_IS_TRAIL((s)[(i)])) { \
(i)=utf8_back1SafeBody(s, start, (int32_t)(i)); \
} \
}
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Value: { \
while(UTF8_IS_TRAIL((s)[i])) { --(i); } \
}
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1.4.2