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/*
* Header file shared between bidi.c and its tests. Not used by
* anything outside the bidi subsystem.
*/
#ifndef PUTTY_BIDI_H
#define PUTTY_BIDI_H
#define LMASK 0x3F /* Embedding Level mask */
#define OMASK 0xC0 /* Override mask */
#define OISL 0x80 /* Override is L */
#define OISR 0x40 /* Override is R */
/* Shaping Helpers */
#define STYPE(xh) ((((xh) >= SHAPE_FIRST) && ((xh) <= SHAPE_LAST)) ? \
shapetypes[(xh)-SHAPE_FIRST].type : SU) /*))*/
#define SISOLATED(xh) (shapetypes[(xh)-SHAPE_FIRST].form_b)
#define SFINAL(xh) ((xh)+1)
#define SINITIAL(xh) ((xh)+2)
#define SMEDIAL(ch) ((ch)+3)
#define leastGreaterOdd(x) ( ((x)+1) | 1 )
#define leastGreaterEven(x) ( ((x)+2) &~ 1 )
/* Function declarations used outside bidi.c */
unsigned char bidi_getType(int ch);
/* Bidi character types */
#define BIDI_CHAR_TYPE_LIST(X) \
X(L) \
X(LRE) \
X(LRO) \
X(LRI) \
X(R) \
X(AL) \
X(RLE) \
X(RLO) \
X(RLI) \
X(PDF) \
X(PDI) \
X(FSI) \
X(EN) \
X(ES) \
X(ET) \
X(AN) \
X(CS) \
X(NSM) \
X(BN) \
X(B) \
X(S) \
X(WS) \
X(ON) \
/* end of list */
/* Shaping Types */
#define SHAPING_CHAR_TYPE_LIST(X) \
X(SL) /* Left-Joining, doesn't exist in U+0600 - U+06FF */ \
X(SR) /* Right-Joining, ie has Isolated, Final */ \
X(SD) /* Dual-Joining, ie has Isolated, Final, Initial, Medial */ \
X(SU) /* Non-Joining */ \
X(SC) /* Join-Causing, like U+0640 (TATWEEL) */ \
/* end of list */
#define ENUM_DECL(name) name,
typedef enum { BIDI_CHAR_TYPE_LIST(ENUM_DECL) N_BIDI_TYPES } BidiType;
typedef enum { SHAPING_CHAR_TYPE_LIST(ENUM_DECL) N_SHAPING_TYPES } ShapingType;
#undef ENUM_DECL
static inline bool typeIsStrong(BidiType t)
{
return ((1<<L) | (1<<R) | (1<<AL)) & (1 << t);
}
static inline bool typeIsWeak(BidiType t)
{
return ((1<<EN) | (1<<ES) | (1<<ET) | (1<<AN) |
(1<<CS) | (1<<NSM) | (1<<BN)) & (1 << t);
}
static inline bool typeIsNeutral(BidiType t)
{
return ((1<<B) | (1<<S) | (1<<WS) | (1<<ON)) & (1 << t);
}
static inline bool typeIsBidiActive(BidiType t)
{
return ((1<<R) | (1<<AL) | (1<<AN) | (1<<RLE) | (1<<LRE) | (1<<RLO) |
(1<<LRO) | (1<<PDF) | (1<<RLI)) & (1 << t);
}
static inline bool typeIsIsolateInitiator(BidiType t)
{
return ((1<<LRI) | (1<<RLI) | (1<<FSI)) & (1 << t);
}
static inline bool typeIsIsolateInitiatorOrPDI(BidiType t)
{
return ((1<<LRI) | (1<<RLI) | (1<<FSI) | (1<<PDI)) & (1 << t);
}
static inline bool typeIsEmbeddingInitiator(BidiType t)
{
return ((1<<LRE) | (1<<RLE) | (1<<LRO) | (1<<RLO)) & (1 << t);
}
static inline bool typeIsEmbeddingInitiatorOrPDF(BidiType t)
{
return ((1<<LRE) | (1<<RLE) | (1<<LRO) | (1<<RLO) | (1<<PDF)) & (1 << t);
}
static inline bool typeIsWeakSeparatorOrTerminator(BidiType t)
{
return ((1<<ES) | (1<<ET) | (1<<CS)) & (1 << t);
}
static inline bool typeIsNeutralOrIsolate(BidiType t)
{
return ((1<<S) | (1<<WS) | (1<<ON) | (1<<FSI) | (1<<LRI) | (1<<RLI) |
(1<<PDI)) & (1 << t);
}
static inline bool typeIsSegmentOrParaSeparator(BidiType t)
{
return ((1<<S) | (1<<B)) & (1 << t);
}
static inline bool typeIsWhitespaceOrIsolate(BidiType t)
{
return ((1<<WS) | (1<<FSI) | (1<<LRI) | (1<<RLI) | (1<<PDI)) & (1 << t);
}
static inline bool typeIsRemovedDuringProcessing(BidiType t)
{
return ((1<<RLE) | (1<<LRE) | (1<<RLO) | (1<<LRO) | (1<<PDF) |
(1<<BN)) & (1 << t);
}
static inline bool typeIsStrongOrNumber(BidiType t)
{
return ((1<<L) | (1<<R) | (1<<AL) | (1<<EN) | (1<<AN)) & (1 << t);
}
static inline bool typeIsETOrBN(BidiType t)
{
return ((1<<ET) | (1<<BN)) & (1 << t);
}
/*
* More featureful interface to the bidi code, for use in bidi_test.c.
* It returns a potentially different value of textlen (in case we're
* compiling in REMOVE_FORMATTING_CHARACTERS mode), and also permits
* you to pass in an override to the paragraph direction (because many
* of the UCD conformance tests use one).
*
* 'override' is 0 for no override, +1 for left-to-right, -1 for
* right-to-left.
*/
size_t do_bidi_test(BidiContext *ctx, bidi_char *text, size_t textlen,
int override);
#endif /* PUTTY_BIDI_H */
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