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/*
* $LynxId: UCDefs.h,v 1.18 2021/06/29 00:21:51 tom Exp $
*
* Definitions for Unicode character-translations
*/
#ifndef UCDEFS_H
#define UCDEFS_H
#ifndef HTUTILS_H
#include <HTUtils.h>
#endif
typedef struct _LYUCcharset {
int UChndl; /* -1 for "old" charsets, >= 0 for chartrans tables */
const char *MIMEname;
int enc;
int codepage; /* if positive, an IBM OS/2 specific number;
if negative, flag for no table translation */
/* parameters below are not used by chartrans mechanism, */
/* they describe some relationships against built-in Latin1 charset... */
int repertoire; /* unused */
int codepoints; /* subset/superset of Latin1 ? */
int cpranges; /* unused, obsolete by LYlowest_eightbit;
"which ranges have valid displayable chars
(including nbsp and shy)" */
int like8859; /* currently used for nbsp and shy only
(but UCT_R_8859SPECL assumed for any UCT_R_8BIT...);
"for which ranges is it like 8859-1" */
} LYUCcharset;
typedef enum {
UCT_ENC_7BIT,
UCT_ENC_8BIT,
UCT_ENC_8859, /* no displayable chars in 0x80-0x9F */
UCT_ENC_8BIT_C0, /* 8-bit + some chars in C0 control area */
UCT_ENC_MAYBE2022,
UCT_ENC_CJK,
UCT_ENC_16BIT,
UCT_ENC_UTF8
} eUCT_ENC;
#define UCT_REP_SUBSETOF_LAT1 0x01
#define UCT_REP_SUPERSETOF_LAT1 0x02
#define UCT_REP_IS_LAT1 UCT_REP_SUBSETOF_LAT1 | UCT_REP_SUPERSETOF_LAT1
/*
* Assume everything we deal with is included in the UCS2 repertoire,
* so a flag for _REP_SUBSETOF_UCS2 would be redundant.
*/
/*
* More general description how the code points relate to 8859-1 and UCS:
*/
#define UCT_CP_SUBSETOF_LAT1 0x01 /* implies UCT_CP_SUBSETOF_UCS2 */
#define UCT_CP_SUPERSETOF_LAT1 0x02
#define UCT_CP_SUBSETOF_UCS2 0x04
#define UCT_CP_IS_LAT1 UCT_CP_SUBSETOF_LAT1 | UCT_CP_SUPERSETOF_LAT1
/*
* More specific bitflags for practically important code point ranges:
*/
#define UCT_R_LOWCTRL 0x08 /* 0x00-0x1F, for completeness */
#define UCT_R_7BITINV 0x10 /* invariant???, displayable 7bit chars */
#define UCT_R_7BITNAT 0x20 /* displayable 7bit, national??? */
#define UCT_R_HIGHCTRL 0x40 /* chars in 0x80-0x9F range */
#define UCT_R_8859SPECL 0x80 /* special chars in 8859-x sets: nbsp and shy */
#define UCT_R_HIGH8BIT 0x100 /* rest of 0xA0-0xFF range */
#define UCT_R_ASCII UCT_R_7BITINV | UCT_R_7BITNAT /* displayable US-ASCII */
#define UCT_R_LAT1 UCT_R_ASCII | UCT_R_8859SPECL | UCT_R_HIGH8BIT
#define UCT_R_8BIT UCT_R_LAT1 | UCT_R_HIGHCTRL /* full 8bit range */
/*
* For the following some comments are in HTAnchor.c.
*/
typedef enum {
UCT_STAGE_MIME,
UCT_STAGE_PARSER, /* What the parser (SGML.c) gets to see */
UCT_STAGE_STRUCTURED, /* What the structured stream (HTML) gets fed */
UCT_STAGE_HTEXT, /* What gets fed to the HText_* functions */
UCT_STAGEMAX
} eUCT_STAGE;
typedef enum {
UCT_SETBY_NONE,
UCT_SETBY_DEFAULT,
UCT_SETBY_LINK, /* set by A or LINK CHARSET= hint */
UCT_SETBY_STRUCTURED, /* structured stream stage (HTML.c) */
UCT_SETBY_PARSER, /* set by SGML parser or similar */
UCT_SETBY_MIME /* set explicitly by MIME charset parameter */
} eUCT_SETBY;
typedef struct _UCStageInfo {
int lock; /* by what it has been set */
int LYhndl;
LYUCcharset C;
} UCStageInfo;
typedef struct _UCAnchorInfo {
struct _UCStageInfo s[UCT_STAGEMAX];
} UCAnchorInfo;
#endif /* UCDEFS_H */
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