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Document struct conv_table.

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Kalle Olavi Niemitalo 2007-01-01 21:11:46 +02:00 committed by Kalle Olavi Niemitalo
parent d8e8e706d6
commit 10f1bd0efc
1 changed files with 14 additions and 0 deletions
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14
src/intl/charsets.h
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@ -31,10 +31,24 @@ typedef uint32_t unicode_val_T;
#define NBSP_CHAR ((unsigned char) 1) #define NBSP_CHAR ((unsigned char) 1)
#define NBSP_CHAR_STRING "\001" #define NBSP_CHAR_STRING "\001"
/* How to convert a byte from a source charset. This is used in an
* array (struct conv_table[256]) indexed by the byte value. */
struct conv_table { struct conv_table {
/* 0 if this is the final byte of a character, or 1 if more
* bytes are needed. */
int t; int t;
union { union {
/* If @t==0: a null-terminated string that is the
* corresponding character in the target charset.
* Normally, the string is statically allocated.
* However, if the translation table is to UTF-8,
* then the strings in elements 0x80 to 0xFF are
* allocated with mem_alloc. */
unsigned char *str; unsigned char *str;
/* If @t==1: a pointer to a nested conversion table
* (with 256 elements) that describes how to convert
* each possible subsequent byte. The conversion
* table owns the nested conversion table. */
struct conv_table *tbl; struct conv_table *tbl;
} u; } u;
}; };