rxvt-unicode/src/grkelot.C

/*---------------------------------*C*--------------------------------------*
 * File:      grkelot.c
 *--------------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 1994,1995 Angelo Haritsis. All rights reserved.
 *                              - original version
 * Copyright (c) 1997,1998 Oezger Kesim <kesim@math.fu-berlin.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *--------------------------------------------------------------------------*
 * Synopsis:    string -> greek ELOT928 or IBM437 string;
 *              4-state FSM implementation.
 *
 * System:      Any (ANSI C)
 *
 * This is code derived from a more generic key remapper written by the same
 * author and used in other environments. It was not written only
 * for greek kbd bindings. An extension to other languages is easy
 * (well don't know how the FSM lends itself to Far East languages).
 *
 * The FSM can have MAX_STATES states (change it for more).
 * Each state contains:
 * 1.  many tranlsation tables (registered via kstate_add_xlat ())
 * 2.  many switch codes for transition to other states (registered via
 *      kstate_add_switcher ()) : limit is static now: MAX_SWITCHER
 * 3.   life: the number of xlations allowed in a state (0 = unlimited)
 *
 * Format of tranlation strings:
 *      <first>-<last>:n1,n2,n3,...
 * Format of switcher string:
 *      A<char>:<state_no>
 * (other switchers apart from A=ascii can be supported; not in this context)
 * Format of life string:
 *      L<N>            (N=0,1,...)
 *-------------------------------------------------------------------------*
 * Written by Angelo Haritis.
 *
 * Redistribution and use in source and binary forms are permitted provided
 * that the above copyright notice and this paragraph are duplicated in all
 * such forms and that any documentation, advertising materials, and other
 * materials related to such distribution and use acknowledge that the
 * software was developed by Angelo Haritsis.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * NB: DO NOT ALTER! THIS CODE IS USED IN MANY PLATFORMS!!!
 *
 * TODO: make it more dynamic (linked lists is an idea but slower)
 */

#define RXVT                    /* define for use by rxvt */

#ifdef RXVT
#include "../config.h"          /* NECESSARY */
#include "rxvt.h"               /* NECESSARY */
#include "grkelot.intpro"       /* PROTOS for internal routines */
#endif                          /* RXVT */

#ifdef GREEK_SUPPORT
#include "grkelot.h"
#include <stdlib.h>
#include <string.h>

/* --- Macros, Types --------- */
#define MAX_STATES      4       /* max # states for the FSM */
#define MAX_SWITCHER    2U      /* per state */
#define MAX_VAL         256     /* for temp allocation */

typedef unsigned char u_char;
typedef unsigned int u_int;
typedef unsigned long u_long;

typedef struct s_xlat
  {
    u_int           first, last;
    u_int          *pval;       /* array of translated values */
  }
K_XLAT;

typedef struct s_switch
  {
    u_char          type;       /* Ascii, Virtual, Scan */
    u_int           code;
    u_char          nextstate;
    u_char          on;         /* current state of key: 0 = off */
  }
K_SWITCH;

typedef struct s_state
  {
    u_int           num_xlat;   /* number of translations */
    K_XLAT         *xlat;       /* State translations ((dynamic - realloc'ed) */
    u_int           num_switcher;       /* number of switcher keys */
    K_SWITCH        switcher[MAX_SWITCHER];     /* switcher keys to other states */
    u_char          life;       /* 0 = until switched by key */
    u_char          prev_state; /* filled when jumped to a new state */
  }
K_STATE;

/* type for each one of the different greek standards (xlat types) */
typedef struct s_xlat_type
  {
    char           *plain;
    char           *accent;
    char           *accent_xtra;
    char           *umlaut;
    char           *acc_uml;
  }
XLAT_TYPE;

/* --- Local Data ------------ */
static K_STATE  State[MAX_STATES];

/* Current State */
static u_char   nStateNow = 0;
static K_STATE *pStateNow = &State[0];
static int      GreekMode = GREEK_ELOT928;

/*
 * The following are hard-coded for now. The idea is that such strings would
 * be read from a config file making it possible to change language/encodings
 * more flexibly.
 */
/* elot 928 xlations */
static char     elot_xlat_plain[] = "65-122:193,194,216,196,197,214,195,199,201,206,202,203,204,205,207,208,81,209,211,212,200,217,87,215,213,198,91,92,93,94,95,96,225,226,248,228,229,246,227,231,233,238,234,235,236,237,239,240,113,241,243,244,232,249,242,247,245,230";

/* c and s give copyright and section sign */
static char     elot_xlat_acc[] = "65-122:182,194,216,196,184,214,195,185,186,206,202,203,204,205,188,208,81,209,211,212,200,191,87,215,190,198,91,92,93,94,95,96,220,226," /*248 */ "169,228,221,246,227,222,223,238,234,235,236,237,252,240,113,241," /*243 */ "167,244,232,254,242,247,253,230";
static char     elot_xlat_acc_xtra[] = "46-62:183,47,48,49,50,51,52,53,54,55,56,57,58,59,171,61,187";   /* anw teleia, quotes */
static char     elot_xlat_uml[] = "65-122:193,194,216,196,197,214,195,199,218,206,202,203,204,205,207,208,81,209,211,212,200,217,87,215,219,198,91,92,93,94,95,96,225,226,248,228,229,246,227,231,250,238,234,235,236,237,239,240,113,241,243,244,232,249,242,247,251,230";
static char     elot_xlat_umacc[] = "65-122:193,194,216,196,197,214,195,199,201,206,202,203,204,205,207,208,81,209,211,212,200,217,87,215,213,198,91,92,93,94,95,96,225,226,248,228,229,246,227,231,192,238,234,235,236,237,239,240,113,241,243,244,232,249,242,247,224,230";

/* ibm 437 xlations */
static char     i437_xlat_plain[] = "65-122:128,129,150,131,132,148,130,134,136,141,137,138,139,140,142,143,81,144,145,146,135,151,87,149,147,133,91,92,93,94,95,96,152,153,175,155,156,173,154,158,160,165,161,162,163,164,166,167,113,168,169,171,159,224,170,174,172,157";
static char     i437_xlat_acc[] = "65-122:234,129,150,131,235,148,130,236,237,141,137,138,139,140,238,143,81,144,145,146,135,240,87,149,239,133,91,92,93,94,95,96,225,153,175,155,226,173,154,227,229,165,161,162,163,164,230,167,113,168,169,171,159,233,170,174,231,157";
static char     i437_xlat_acc_xtra[] = "46-46:250";     /* anw teleia */
static char     i437_xlat_uml[] = "65-122:128,129,150,131,132,148,130,134,136,141,137,138,139,140,142,143,81,144,145,146,135,151,87,149,147,133,91,92,93,94,95,96,152,153,175,155,156,173,154,158,228,165,161,162,163,164,166,167,113,168,169,171,159,224,170,174,232,157";
static char     i437_xlat_umacc[] = "65-122:128,129,150,131,132,148,130,134,136,141,137,138,139,140,142,143,81,144,145,146,135,151,87,149,147,133,91,92,93,94,95,96,152,153,175,155,156,173,154,158,42,165,161,162,163,164,166,167,113,168,169,171,159,224,170,174,42,157";

/*
 * currently ELOT928 and IBM437 are supported; easy to include others
 * (not recommended: stick to just these 2 if not only the ELOT one)
 */
static XLAT_TYPE xlat_type[] =
  {
    {elot_xlat_plain, elot_xlat_acc, elot_xlat_acc_xtra, elot_xlat_uml, elot_xlat_umacc},
    {i437_xlat_plain, i437_xlat_acc, i437_xlat_acc_xtra, i437_xlat_uml, i437_xlat_umacc},
  };

/* the current trasnaltion type */
static XLAT_TYPE *xlat_now = &xlat_type[GREEK_ELOT928];

#define NUM_XLAT_TYPES  (sizeof(xlat_type) / sizeof(xlat_type[0]))

static void     kstate_add_xlat (char *str);
static void     kstate_add_switcher (char *str);
static void     kstate_set_life (char *str);

/* --- Functions ------------- */
void
kstate_setcurr (int stateno)
{
  u_char          prev_state;

  if ((u_int) stateno > (u_int) MAX_STATES)
    return;
  if (pStateNow->life == 1)
    prev_state = pStateNow->prev_state;
  else
    prev_state = nStateNow;
  pStateNow = &State[nStateNow = stateno];
  pStateNow->prev_state = prev_state;
}

void
kstate_init (void)
{
  pStateNow->num_xlat = pStateNow->num_switcher = pStateNow->life = pStateNow->prev_state = 0;
  pStateNow->xlat = NULL;
}

void
kstate_end (void)
{
  int             i;

  for (i = 0; i < pStateNow->num_xlat; i++)
    free (pStateNow->xlat[i].pval);
  if (pStateNow->num_xlat > 0)
    free (pStateNow->xlat);
}

/*
 * Hard coded ELOT-928 translations. Could read these from an rc-type file
 * to support other remappers.
 */
void
kstate_init_all (int greek_mode)
{
  /* the translation tables for the 4 FSM states for ELOT-928 mappings */
  int             i;

  for (i = 0; i < MAX_STATES; i++)
    {
      kstate_setcurr (i);
      kstate_init ();
    }
  if (greek_mode < 0 || greek_mode >= NUM_XLAT_TYPES)           /* avoid death */
    greek_mode = GREEK_ELOT928;
  xlat_now = &xlat_type[greek_mode];
  kstate_setcurr (0);
  kstate_add_xlat (xlat_now->plain);
  kstate_add_switcher ("A;:1");
  kstate_add_switcher ("A::2");
  kstate_set_life ("L0");

  kstate_setcurr (1);
  kstate_add_xlat (xlat_now->accent);
  kstate_add_xlat (xlat_now->accent_xtra);
  kstate_add_switcher ("A::3");
  kstate_set_life ("L1");

  kstate_setcurr (2);
  kstate_add_xlat (xlat_now->umlaut);
  kstate_add_switcher ("A;:3");
  kstate_set_life ("L1");

  kstate_setcurr (3);
  kstate_add_xlat (xlat_now->acc_uml);
  kstate_set_life ("L1");
}

void
kstate_end_all (void)
{
  int             i;

  for (i = 0; i < MAX_STATES; i++)
    {
      kstate_setcurr (i);
      kstate_end ();
    }
  kstate_setcurr (0);
}

/*
 * reset FSM
 */
void
kstate_reset (void)
{
  kstate_setcurr (0);
}

void
kstate_add_xlat (char *str)
{
  K_XLAT         *xlat;
  u_int          *pval_tmp;
  char           *sval;
  int             i;

  if (str == NULL)
    return;
  /* add a new xlat table in state */
  if (pStateNow->num_xlat == 0)
    {
      pStateNow->xlat = malloc (sizeof (K_XLAT));
    }
  else                  /* prefer contiguous data, realloc */
    pStateNow->xlat = realloc (pStateNow->xlat, (pStateNow->num_xlat + 1) * sizeof (K_XLAT));
  xlat = &pStateNow->xlat[pStateNow->num_xlat];
  /* parse str and derive first, last, values */
  xlat->first = (u_int) atoi (strtok (str, "-"));
  xlat->last = (u_int) atoi (strtok (NULL, ":"));
  i = 0;
  pval_tmp = calloc (MAX_VAL, sizeof (K_XLAT));
  while ((sval = strtok (NULL, ",")) != NULL)
    pval_tmp[i++] = (u_int) (atoi (sval));
  xlat->pval = calloc (i, sizeof (K_XLAT));
  if (xlat->pval != NULL)
    memcpy (xlat->pval, pval_tmp, i * sizeof (u_int));
  free (pval_tmp);
  pStateNow->num_xlat++;
}

/*
 * Ascii only for this implementation
 */
void
kstate_add_switcher (char *str)
{
  K_SWITCH       *switcher;

  if (str == NULL)
    return;
  if (pStateNow->num_switcher >= MAX_SWITCHER)
    return;
  switcher = &pStateNow->switcher[pStateNow->num_switcher];
  switch (switcher->type = str[0])
    {
      case 'A':                 /* ascii eg: A;:2 */
        switcher->code = str[1];
        switcher->nextstate = atoi (&str[3]);
        break;
    }
  switcher->on = 0;
  pStateNow->num_switcher++;
}

/* L1 or L0 */
void
kstate_set_life (char *str)
{
  pStateNow->life = atoi (&str[1]);
}

unsigned int
kstate_cxlat (unsigned int c)
{
  int             i;

  /* check for ascii switcher */
  for (i = 0; i < pStateNow->num_switcher; i++)
    if (pStateNow->switcher[i].type == 'A' &&   /* only ascii here */
        c == pStateNow->switcher[i].code)
      {
        kstate_setcurr (pStateNow->switcher[i].nextstate);
        pStateNow->switcher[i].on = 1;
        return ((unsigned int)-1);
      }
  /* do translation */
  for (i = 0; i < pStateNow->num_xlat; i++)
    if (c >= pStateNow->xlat[i].first && c <= pStateNow->xlat[i].last)
      {
        c = pStateNow->xlat[i].pval[c - pStateNow->xlat[i].first];
        break;
      }
  /* switch back to previous state if life of current is 1 */
  if (pStateNow->life == 1)
    kstate_setcurr (pStateNow->prev_state);
  return (c);
}

#ifdef RXVT
void
greek_init (void)
{
  kstate_init_all (GreekMode);
}

void
greek_end (void)
{
  kstate_end_all ();
}

void
greek_reset (void)
{
  kstate_reset ();
}

void
greek_setmode (int greek_mode)
{
  GreekMode = greek_mode;
}

int
greek_getmode (void)
{
  return (GreekMode);
}

/*
 * xlate a given string in-place - return new string length
 */
int
greek_xlat (char *s, int num_chars)
{
  int             i, count;
  unsigned int    c;

  for (i = 0, count = 0; i < num_chars; i++)
    {
      c = kstate_cxlat ((unsigned int)s[i]);
      if (c != -1)
        s[count++] = (char)c;
    }
  s[count] = '\0';
  return (count);

}

#ifdef TEST
int
main (void)
{
  /*char text[] = "abcdef;aGDZXC"; */
  char            text[] = "abcdef;a:ibgdezhuiklmnjoprstyfxcv";

  kstate_init_all (GREEK_ELOT928);
  printf ("text: %s\n", text);
  greek_xlat (text, strlen (text));
  printf ("xlat'ed text: %s\n", text);
  kstate_end_all ();
  return 0;
}
#endif
#endif                          /* RXVT */

#endif                          /* GREEK_SUPPORT */
Revision:	1.7
Committed:	Sun Feb 22 08:09:37 2004 UTC (22 years, 7 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.6:	+0 -0 lines
State:	*FILE REMOVED*
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/---------------------------------C--------------------------------------
2			* File: grkelot.c
3			--------------------------------------------------------------------------
4			*
5			* All portions of code are copyright by their respective author/s.
6			* Copyright (c) 1994,1995 Angelo Haritsis. All rights reserved.
7			* - original version
8			* Copyright (c) 1997,1998 Oezger Kesim <kesim@math.fu-berlin.de>
9			*
10			* This program is free software; you can redistribute it and/or modify
11			* it under the terms of the GNU General Public License as published by
12			* the Free Software Foundation; either version 2 of the License, or
13			* (at your option) any later version.
14			*
15			* This program is distributed in the hope that it will be useful,
16			* but WITHOUT ANY WARRANTY; without even the implied warranty of
17			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18			* GNU General Public License for more details.
19			*
20			* You should have received a copy of the GNU General Public License
21			* along with this program; if not, write to the Free Software
22			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23			--------------------------------------------------------------------------
24			* Synopsis: string -> greek ELOT928 or IBM437 string;
25			* 4-state FSM implementation.
26			*
27			* System: Any (ANSI C)
28			*
29			* This is code derived from a more generic key remapper written by the same
30			* author and used in other environments. It was not written only
31			* for greek kbd bindings. An extension to other languages is easy
32			* (well don't know how the FSM lends itself to Far East languages).
33			*
34			* The FSM can have MAX_STATES states (change it for more).
35			* Each state contains:
36	pcg	1.6	* 1. many tranlsation tables (registered via kstate_add_xlat ())
37	pcg	1.1	* 2. many switch codes for transition to other states (registered via
38	pcg	1.6	* kstate_add_switcher ()) : limit is static now: MAX_SWITCHER
39	pcg	1.1	* 3. life: the number of xlations allowed in a state (0 = unlimited)
40			*
41			* Format of tranlation strings:
42			* <first>-<last>:n1,n2,n3,...
43			* Format of switcher string:
44			* A<char>:<state_no>
45			* (other switchers apart from A=ascii can be supported; not in this context)
46			* Format of life string:
47			* L<N> (N=0,1,...)
48			-------------------------------------------------------------------------
49			* Written by Angelo Haritis.
50			*
51			* Redistribution and use in source and binary forms are permitted provided
52			* that the above copyright notice and this paragraph are duplicated in all
53			* such forms and that any documentation, advertising materials, and other
54			* materials related to such distribution and use acknowledge that the
55			* software was developed by Angelo Haritsis.
56			* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
57			* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
58			* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
59			*
60			* NB: DO NOT ALTER! THIS CODE IS USED IN MANY PLATFORMS!!!
61			*
62			* TODO: make it more dynamic (linked lists is an idea but slower)
63			*/
64
65			#define RXVT /* define for use by rxvt */
66
67			#ifdef RXVT
68			#include "../config.h" /* NECESSARY */
69			#include "rxvt.h" /* NECESSARY */
70			#include "grkelot.intpro" /* PROTOS for internal routines */
71			#endif /* RXVT */
72
73			#ifdef GREEK_SUPPORT
74			#include "grkelot.h"
75			#include <stdlib.h>
76			#include <string.h>
77
78			/* --- Macros, Types --------- */
79			#define MAX_STATES 4 /* max # states for the FSM */
80			#define MAX_SWITCHER 2U /* per state */
81			#define MAX_VAL 256 /* for temp allocation */
82
83			typedef unsigned char u_char;
84			typedef unsigned int u_int;
85			typedef unsigned long u_long;
86
87	pcg	1.5	typedef struct s_xlat
88			{
89	pcg	1.1	u_int first, last;
90			u_int pval; / array of translated values */
91	pcg	1.5	}
92			K_XLAT;
93	pcg	1.1
94	pcg	1.5	typedef struct s_switch
95			{
96	pcg	1.1	u_char type; /* Ascii, Virtual, Scan */
97			u_int code;
98			u_char nextstate;
99			u_char on; /* current state of key: 0 = off */
100	pcg	1.5	}
101			K_SWITCH;
102	pcg	1.1
103	pcg	1.5	typedef struct s_state
104			{
105	pcg	1.1	u_int num_xlat; /* number of translations */
106			K_XLAT xlat; / State translations ((dynamic - realloc'ed) */
107			u_int num_switcher; /* number of switcher keys */
108			K_SWITCH switcher[MAX_SWITCHER]; /* switcher keys to other states */
109			u_char life; /* 0 = until switched by key */
110			u_char prev_state; /* filled when jumped to a new state */
111	pcg	1.5	}
112			K_STATE;
113	pcg	1.1
114			/* type for each one of the different greek standards (xlat types) */
115	pcg	1.5	typedef struct s_xlat_type
116			{
117	pcg	1.1	char *plain;
118			char *accent;
119			char *accent_xtra;
120			char *umlaut;
121			char *acc_uml;
122	pcg	1.5	}
123			XLAT_TYPE;
124	pcg	1.1
125			/* --- Local Data ------------ */
126			static K_STATE State[MAX_STATES];
127
128			/* Current State */
129			static u_char nStateNow = 0;
130			static K_STATE *pStateNow = &State[0];
131			static int GreekMode = GREEK_ELOT928;
132
133			/*
134			* The following are hard-coded for now. The idea is that such strings would
135			* be read from a config file making it possible to change language/encodings
136			* more flexibly.
137			*/
138			/* elot 928 xlations */
139			static char elot_xlat_plain[] = "65-122:193,194,216,196,197,214,195,199,201,206,202,203,204,205,207,208,81,209,211,212,200,217,87,215,213,198,91,92,93,94,95,96,225,226,248,228,229,246,227,231,233,238,234,235,236,237,239,240,113,241,243,244,232,249,242,247,245,230";
140
141			/* c and s give copyright and section sign */
142			static char elot_xlat_acc[] = "65-122:182,194,216,196,184,214,195,185,186,206,202,203,204,205,188,208,81,209,211,212,200,191,87,215,190,198,91,92,93,94,95,96,220,226," /248 / "169,228,221,246,227,222,223,238,234,235,236,237,252,240,113,241," /243 / "167,244,232,254,242,247,253,230";
143			static char elot_xlat_acc_xtra[] = "46-62:183,47,48,49,50,51,52,53,54,55,56,57,58,59,171,61,187"; /* anw teleia, quotes */
144			static char elot_xlat_uml[] = "65-122:193,194,216,196,197,214,195,199,218,206,202,203,204,205,207,208,81,209,211,212,200,217,87,215,219,198,91,92,93,94,95,96,225,226,248,228,229,246,227,231,250,238,234,235,236,237,239,240,113,241,243,244,232,249,242,247,251,230";
145			static char elot_xlat_umacc[] = "65-122:193,194,216,196,197,214,195,199,201,206,202,203,204,205,207,208,81,209,211,212,200,217,87,215,213,198,91,92,93,94,95,96,225,226,248,228,229,246,227,231,192,238,234,235,236,237,239,240,113,241,243,244,232,249,242,247,224,230";
146
147			/* ibm 437 xlations */
148			static char i437_xlat_plain[] = "65-122:128,129,150,131,132,148,130,134,136,141,137,138,139,140,142,143,81,144,145,146,135,151,87,149,147,133,91,92,93,94,95,96,152,153,175,155,156,173,154,158,160,165,161,162,163,164,166,167,113,168,169,171,159,224,170,174,172,157";
149			static char i437_xlat_acc[] = "65-122:234,129,150,131,235,148,130,236,237,141,137,138,139,140,238,143,81,144,145,146,135,240,87,149,239,133,91,92,93,94,95,96,225,153,175,155,226,173,154,227,229,165,161,162,163,164,230,167,113,168,169,171,159,233,170,174,231,157";
150			static char i437_xlat_acc_xtra[] = "46-46:250"; /* anw teleia */
151			static char i437_xlat_uml[] = "65-122:128,129,150,131,132,148,130,134,136,141,137,138,139,140,142,143,81,144,145,146,135,151,87,149,147,133,91,92,93,94,95,96,152,153,175,155,156,173,154,158,228,165,161,162,163,164,166,167,113,168,169,171,159,224,170,174,232,157";
152			static char i437_xlat_umacc[] = "65-122:128,129,150,131,132,148,130,134,136,141,137,138,139,140,142,143,81,144,145,146,135,151,87,149,147,133,91,92,93,94,95,96,152,153,175,155,156,173,154,158,42,165,161,162,163,164,166,167,113,168,169,171,159,224,170,174,42,157";
153
154			/*
155			* currently ELOT928 and IBM437 are supported; easy to include others
156			* (not recommended: stick to just these 2 if not only the ELOT one)
157			*/
158			static XLAT_TYPE xlat_type[] =
159	pcg	1.5	{
160	pcg	1.1	{elot_xlat_plain, elot_xlat_acc, elot_xlat_acc_xtra, elot_xlat_uml, elot_xlat_umacc},
161			{i437_xlat_plain, i437_xlat_acc, i437_xlat_acc_xtra, i437_xlat_uml, i437_xlat_umacc},
162	pcg	1.5	};
163	pcg	1.1
164			/* the current trasnaltion type */
165			static XLAT_TYPE *xlat_now = &xlat_type[GREEK_ELOT928];
166
167			#define NUM_XLAT_TYPES (sizeof(xlat_type) / sizeof(xlat_type[0]))
168
169	pcg	1.6	static void kstate_add_xlat (char *str);
170			static void kstate_add_switcher (char *str);
171			static void kstate_set_life (char *str);
172	pcg	1.1
173			/* --- Functions ------------- */
174			void
175	pcg	1.6	kstate_setcurr (int stateno)
176	pcg	1.1	{
177	pcg	1.5	u_char prev_state;
178	pcg	1.1
179	pcg	1.5	if ((u_int) stateno > (u_int) MAX_STATES)
180			return;
181			if (pStateNow->life == 1)
182			prev_state = pStateNow->prev_state;
183			else
184			prev_state = nStateNow;
185			pStateNow = &State[nStateNow = stateno];
186			pStateNow->prev_state = prev_state;
187	pcg	1.1	}
188
189			void
190	pcg	1.6	kstate_init (void)
191	pcg	1.1	{
192	pcg	1.5	pStateNow->num_xlat = pStateNow->num_switcher = pStateNow->life = pStateNow->prev_state = 0;
193			pStateNow->xlat = NULL;
194	pcg	1.1	}
195
196			void
197	pcg	1.6	kstate_end (void)
198	pcg	1.1	{
199	pcg	1.5	int i;
200	pcg	1.1
201	pcg	1.5	for (i = 0; i < pStateNow->num_xlat; i++)
202	pcg	1.6	free (pStateNow->xlat[i].pval);
203	pcg	1.5	if (pStateNow->num_xlat > 0)
204	pcg	1.6	free (pStateNow->xlat);
205	pcg	1.1	}
206
207			/*
208			* Hard coded ELOT-928 translations. Could read these from an rc-type file
209			* to support other remappers.
210			*/
211			void
212	pcg	1.6	kstate_init_all (int greek_mode)
213	pcg	1.1	{
214	pcg	1.5	/* the translation tables for the 4 FSM states for ELOT-928 mappings */
215			int i;
216	pcg	1.1
217	pcg	1.5	for (i = 0; i < MAX_STATES; i++)
218			{
219	pcg	1.6	kstate_setcurr (i);
220			kstate_init ();
221	pcg	1.1	}
222	pcg	1.5	if (greek_mode < 0 \|\| greek_mode >= NUM_XLAT_TYPES) /* avoid death */
223			greek_mode = GREEK_ELOT928;
224			xlat_now = &xlat_type[greek_mode];
225	pcg	1.6	kstate_setcurr (0);
226			kstate_add_xlat (xlat_now->plain);
227			kstate_add_switcher ("A;:1");
228			kstate_add_switcher ("A::2");
229			kstate_set_life ("L0");
230
231			kstate_setcurr (1);
232			kstate_add_xlat (xlat_now->accent);
233			kstate_add_xlat (xlat_now->accent_xtra);
234			kstate_add_switcher ("A::3");
235			kstate_set_life ("L1");
236
237			kstate_setcurr (2);
238			kstate_add_xlat (xlat_now->umlaut);
239			kstate_add_switcher ("A;:3");
240			kstate_set_life ("L1");
241
242			kstate_setcurr (3);
243			kstate_add_xlat (xlat_now->acc_uml);
244			kstate_set_life ("L1");
245	pcg	1.1	}
246
247			void
248	pcg	1.6	kstate_end_all (void)
249	pcg	1.1	{
250	pcg	1.5	int i;
251	pcg	1.1
252	pcg	1.5	for (i = 0; i < MAX_STATES; i++)
253			{
254	pcg	1.6	kstate_setcurr (i);
255			kstate_end ();
256	pcg	1.1	}
257	pcg	1.6	kstate_setcurr (0);
258	pcg	1.1	}
259
260			/*
261			* reset FSM
262			*/
263			void
264	pcg	1.6	kstate_reset (void)
265	pcg	1.1	{
266	pcg	1.6	kstate_setcurr (0);
267	pcg	1.1	}
268
269			void
270	pcg	1.6	kstate_add_xlat (char *str)
271	pcg	1.1	{
272	pcg	1.5	K_XLAT *xlat;
273			u_int *pval_tmp;
274			char *sval;
275			int i;
276
277			if (str == NULL)
278			return;
279			/* add a new xlat table in state */
280			if (pStateNow->num_xlat == 0)
281			{
282	pcg	1.6	pStateNow->xlat = malloc (sizeof (K_XLAT));
283	pcg	1.5	}
284			else /* prefer contiguous data, realloc */
285	pcg	1.6	pStateNow->xlat = realloc (pStateNow->xlat, (pStateNow->num_xlat + 1) * sizeof (K_XLAT));
286	pcg	1.5	xlat = &pStateNow->xlat[pStateNow->num_xlat];
287			/* parse str and derive first, last, values */
288	pcg	1.6	xlat->first = (u_int) atoi (strtok (str, "-"));
289			xlat->last = (u_int) atoi (strtok (NULL, ":"));
290	pcg	1.5	i = 0;
291	pcg	1.6	pval_tmp = calloc (MAX_VAL, sizeof (K_XLAT));
292			while ((sval = strtok (NULL, ",")) != NULL)
293			pval_tmp[i++] = (u_int) (atoi (sval));
294			xlat->pval = calloc (i, sizeof (K_XLAT));
295	pcg	1.5	if (xlat->pval != NULL)
296	pcg	1.6	memcpy (xlat->pval, pval_tmp, i * sizeof (u_int));
297			free (pval_tmp);
298	pcg	1.5	pStateNow->num_xlat++;
299	pcg	1.1	}
300
301			/*
302			* Ascii only for this implementation
303			*/
304			void
305	pcg	1.6	kstate_add_switcher (char *str)
306	pcg	1.1	{
307	pcg	1.5	K_SWITCH *switcher;
308	pcg	1.1
309	pcg	1.5	if (str == NULL)
310			return;
311			if (pStateNow->num_switcher >= MAX_SWITCHER)
312			return;
313			switcher = &pStateNow->switcher[pStateNow->num_switcher];
314			switch (switcher->type = str[0])
315			{
316			case 'A': /* ascii eg: A;:2 */
317			switcher->code = str[1];
318	pcg	1.6	switcher->nextstate = atoi (&str[3]);
319	pcg	1.5	break;
320	pcg	1.1	}
321	pcg	1.5	switcher->on = 0;
322			pStateNow->num_switcher++;
323	pcg	1.1	}
324
325			/* L1 or L0 */
326			void
327	pcg	1.6	kstate_set_life (char *str)
328	pcg	1.1	{
329	pcg	1.6	pStateNow->life = atoi (&str[1]);
330	pcg	1.1	}
331
332			unsigned int
333	pcg	1.6	kstate_cxlat (unsigned int c)
334	pcg	1.1	{
335	pcg	1.5	int i;
336	pcg	1.1
337	pcg	1.5	/* check for ascii switcher */
338			for (i = 0; i < pStateNow->num_switcher; i++)
339			if (pStateNow->switcher[i].type == 'A' && /* only ascii here */
340			c == pStateNow->switcher[i].code)
341			{
342	pcg	1.6	kstate_setcurr (pStateNow->switcher[i].nextstate);
343	pcg	1.5	pStateNow->switcher[i].on = 1;
344			return ((unsigned int)-1);
345			}
346			/* do translation */
347			for (i = 0; i < pStateNow->num_xlat; i++)
348			if (c >= pStateNow->xlat[i].first && c <= pStateNow->xlat[i].last)
349			{
350			c = pStateNow->xlat[i].pval[c - pStateNow->xlat[i].first];
351			break;
352			}
353			/* switch back to previous state if life of current is 1 */
354			if (pStateNow->life == 1)
355	pcg	1.6	kstate_setcurr (pStateNow->prev_state);
356	pcg	1.5	return (c);
357	pcg	1.1	}
358
359			#ifdef RXVT
360			void
361	pcg	1.6	greek_init (void)
362	pcg	1.1	{
363	pcg	1.6	kstate_init_all (GreekMode);
364	pcg	1.1	}
365
366			void
367	pcg	1.6	greek_end (void)
368	pcg	1.1	{
369	pcg	1.6	kstate_end_all ();
370	pcg	1.1	}
371
372			void
373	pcg	1.6	greek_reset (void)
374	pcg	1.1	{
375	pcg	1.6	kstate_reset ();
376	pcg	1.1	}
377
378			void
379	pcg	1.6	greek_setmode (int greek_mode)
380	pcg	1.1	{
381	pcg	1.5	GreekMode = greek_mode;
382	pcg	1.1	}
383
384			int
385	pcg	1.6	greek_getmode (void)
386	pcg	1.1	{
387	pcg	1.5	return (GreekMode);
388	pcg	1.1	}
389
390			/*
391			* xlate a given string in-place - return new string length
392			*/
393			int
394	pcg	1.6	greek_xlat (char *s, int num_chars)
395	pcg	1.1	{
396	pcg	1.5	int i, count;
397			unsigned int c;
398	pcg	1.1
399	pcg	1.5	for (i = 0, count = 0; i < num_chars; i++)
400			{
401	pcg	1.6	c = kstate_cxlat ((unsigned int)s[i]);
402	pcg	1.5	if (c != -1)
403			s[count++] = (char)c;
404	pcg	1.1	}
405	pcg	1.5	s[count] = '\0';
406			return (count);
407	pcg	1.1
408			}
409
410			#ifdef TEST
411			int
412	pcg	1.6	main (void)
413	pcg	1.1	{
414	pcg	1.5	/char text[] = "abcdef;aGDZXC"; /
415			char text[] = "abcdef;a:ibgdezhuiklmnjoprstyfxcv";
416	pcg	1.1
417	pcg	1.6	kstate_init_all (GREEK_ELOT928);
418			printf ("text: %s\n", text);
419			greek_xlat (text, strlen (text));
420			printf ("xlat'ed text: %s\n", text);
421			kstate_end_all ();
422	pcg	1.5	return 0;
423	pcg	1.1	}
424			#endif
425			#endif /* RXVT */
426
427			#endif /* GREEK_SUPPORT */