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pcg |
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/*---------------------------------*C*--------------------------------------* |
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* File: grkelot.c |
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*--------------------------------------------------------------------------* |
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* |
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* All portions of code are copyright by their respective author/s. |
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* Copyright (c) 1994,1995 Angelo Haritsis. All rights reserved. |
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* - original version |
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* Copyright (c) 1997,1998 Oezger Kesim <kesim@math.fu-berlin.de> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*--------------------------------------------------------------------------* |
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* Synopsis: string -> greek ELOT928 or IBM437 string; |
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* 4-state FSM implementation. |
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* |
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* System: Any (ANSI C) |
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* |
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* This is code derived from a more generic key remapper written by the same |
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* author and used in other environments. It was not written only |
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* for greek kbd bindings. An extension to other languages is easy |
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* (well don't know how the FSM lends itself to Far East languages). |
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* |
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* The FSM can have MAX_STATES states (change it for more). |
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* Each state contains: |
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* 1. many tranlsation tables (registered via kstate_add_xlat()) |
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* 2. many switch codes for transition to other states (registered via |
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* kstate_add_switcher()) : limit is static now: MAX_SWITCHER |
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* 3. life: the number of xlations allowed in a state (0 = unlimited) |
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* |
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* Format of tranlation strings: |
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* <first>-<last>:n1,n2,n3,... |
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* Format of switcher string: |
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* A<char>:<state_no> |
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* (other switchers apart from A=ascii can be supported; not in this context) |
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* Format of life string: |
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* L<N> (N=0,1,...) |
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*-------------------------------------------------------------------------* |
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* Written by Angelo Haritis. |
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* |
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* Redistribution and use in source and binary forms are permitted provided |
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* that the above copyright notice and this paragraph are duplicated in all |
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* such forms and that any documentation, advertising materials, and other |
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* materials related to such distribution and use acknowledge that the |
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* software was developed by Angelo Haritsis. |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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* |
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* NB: DO NOT ALTER! THIS CODE IS USED IN MANY PLATFORMS!!! |
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* |
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* TODO: make it more dynamic (linked lists is an idea but slower) |
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*/ |
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#define RXVT /* define for use by rxvt */ |
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#ifdef RXVT |
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#include "../config.h" /* NECESSARY */ |
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#include "rxvt.h" /* NECESSARY */ |
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#include "grkelot.intpro" /* PROTOS for internal routines */ |
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#endif /* RXVT */ |
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#ifdef GREEK_SUPPORT |
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#include "grkelot.h" |
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#include <stdlib.h> |
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#include <string.h> |
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/* --- Macros, Types --------- */ |
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#define MAX_STATES 4 /* max # states for the FSM */ |
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#define MAX_SWITCHER 2U /* per state */ |
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#define MAX_VAL 256 /* for temp allocation */ |
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typedef unsigned char u_char; |
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typedef unsigned int u_int; |
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typedef unsigned long u_long; |
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typedef struct s_xlat { |
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u_int first, last; |
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u_int *pval; /* array of translated values */ |
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} K_XLAT; |
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typedef struct s_switch { |
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u_char type; /* Ascii, Virtual, Scan */ |
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u_int code; |
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u_char nextstate; |
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u_char on; /* current state of key: 0 = off */ |
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} K_SWITCH; |
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typedef struct s_state { |
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u_int num_xlat; /* number of translations */ |
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K_XLAT *xlat; /* State translations ((dynamic - realloc'ed) */ |
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u_int num_switcher; /* number of switcher keys */ |
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K_SWITCH switcher[MAX_SWITCHER]; /* switcher keys to other states */ |
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u_char life; /* 0 = until switched by key */ |
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u_char prev_state; /* filled when jumped to a new state */ |
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} K_STATE; |
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/* type for each one of the different greek standards (xlat types) */ |
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typedef struct s_xlat_type { |
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char *plain; |
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char *accent; |
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char *accent_xtra; |
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char *umlaut; |
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char *acc_uml; |
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} XLAT_TYPE; |
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/* --- Local Data ------------ */ |
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static K_STATE State[MAX_STATES]; |
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/* Current State */ |
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static u_char nStateNow = 0; |
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static K_STATE *pStateNow = &State[0]; |
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static int GreekMode = GREEK_ELOT928; |
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/* |
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* The following are hard-coded for now. The idea is that such strings would |
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* be read from a config file making it possible to change language/encodings |
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* more flexibly. |
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*/ |
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/* elot 928 xlations */ |
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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"; |
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/* c and s give copyright and section sign */ |
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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"; |
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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 */ |
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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"; |
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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"; |
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/* ibm 437 xlations */ |
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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"; |
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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"; |
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static char i437_xlat_acc_xtra[] = "46-46:250"; /* anw teleia */ |
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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"; |
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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"; |
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/* |
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* currently ELOT928 and IBM437 are supported; easy to include others |
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* (not recommended: stick to just these 2 if not only the ELOT one) |
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*/ |
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static XLAT_TYPE xlat_type[] = |
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{ |
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{elot_xlat_plain, elot_xlat_acc, elot_xlat_acc_xtra, elot_xlat_uml, elot_xlat_umacc}, |
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{i437_xlat_plain, i437_xlat_acc, i437_xlat_acc_xtra, i437_xlat_uml, i437_xlat_umacc}, |
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}; |
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/* the current trasnaltion type */ |
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static XLAT_TYPE *xlat_now = &xlat_type[GREEK_ELOT928]; |
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#define NUM_XLAT_TYPES (sizeof(xlat_type) / sizeof(xlat_type[0])) |
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static void kstate_add_xlat(char *str); |
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static void kstate_add_switcher(char *str); |
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static void kstate_set_life(char *str); |
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/* --- Functions ------------- */ |
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void |
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kstate_setcurr(int stateno) |
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{ |
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u_char prev_state; |
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if ((u_int) stateno > (u_int) MAX_STATES) |
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return; |
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if (pStateNow->life == 1) |
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prev_state = pStateNow->prev_state; |
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else |
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prev_state = nStateNow; |
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pStateNow = &State[nStateNow = stateno]; |
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pStateNow->prev_state = prev_state; |
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} |
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void |
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kstate_init(void) |
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{ |
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pStateNow->num_xlat = pStateNow->num_switcher = pStateNow->life = pStateNow->prev_state = 0; |
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pStateNow->xlat = NULL; |
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} |
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void |
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kstate_end(void) |
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{ |
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int i; |
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for (i = 0; i < pStateNow->num_xlat; i++) |
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free(pStateNow->xlat[i].pval); |
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if (pStateNow->num_xlat > 0) |
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free(pStateNow->xlat); |
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} |
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/* |
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* Hard coded ELOT-928 translations. Could read these from an rc-type file |
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* to support other remappers. |
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*/ |
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void |
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kstate_init_all(int greek_mode) |
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{ |
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/* the translation tables for the 4 FSM states for ELOT-928 mappings */ |
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int i; |
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for (i = 0; i < MAX_STATES; i++) { |
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kstate_setcurr(i); |
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kstate_init(); |
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} |
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if (greek_mode < 0 || greek_mode >= NUM_XLAT_TYPES) /* avoid death */ |
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greek_mode = GREEK_ELOT928; |
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xlat_now = &xlat_type[greek_mode]; |
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kstate_setcurr(0); |
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kstate_add_xlat(xlat_now->plain); |
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kstate_add_switcher("A;:1"); |
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kstate_add_switcher("A::2"); |
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kstate_set_life("L0"); |
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kstate_setcurr(1); |
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kstate_add_xlat(xlat_now->accent); |
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kstate_add_xlat(xlat_now->accent_xtra); |
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kstate_add_switcher("A::3"); |
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kstate_set_life("L1"); |
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kstate_setcurr(2); |
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kstate_add_xlat(xlat_now->umlaut); |
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kstate_add_switcher("A;:3"); |
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kstate_set_life("L1"); |
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kstate_setcurr(3); |
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kstate_add_xlat(xlat_now->acc_uml); |
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kstate_set_life("L1"); |
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} |
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void |
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kstate_end_all(void) |
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{ |
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int i; |
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for (i = 0; i < MAX_STATES; i++) { |
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kstate_setcurr(i); |
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kstate_end(); |
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} |
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kstate_setcurr(0); |
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} |
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/* |
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* reset FSM |
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*/ |
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void |
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kstate_reset(void) |
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{ |
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kstate_setcurr(0); |
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} |
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void |
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kstate_add_xlat(char *str) |
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{ |
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K_XLAT *xlat; |
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u_int *pval_tmp; |
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char *sval; |
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int i; |
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if (str == NULL) |
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return; |
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/* add a new xlat table in state */ |
| 270 |
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if (pStateNow->num_xlat == 0) { |
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pStateNow->xlat = malloc(sizeof(K_XLAT)); |
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} else /* prefer contiguous data, realloc */ |
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pStateNow->xlat = realloc(pStateNow->xlat, (pStateNow->num_xlat + 1) * sizeof(K_XLAT)); |
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xlat = &pStateNow->xlat[pStateNow->num_xlat]; |
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/* parse str and derive first, last, values */ |
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xlat->first = (u_int) atoi(strtok(str, "-")); |
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xlat->last = (u_int) atoi(strtok(NULL, ":")); |
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i = 0; |
| 279 |
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pval_tmp = calloc(MAX_VAL, sizeof(K_XLAT)); |
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while ((sval = strtok(NULL, ",")) != NULL) |
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pval_tmp[i++] = (u_int) (atoi(sval)); |
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xlat->pval = calloc(i, sizeof(K_XLAT)); |
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if (xlat->pval != NULL) |
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memcpy(xlat->pval, pval_tmp, i * sizeof(u_int)); |
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free(pval_tmp); |
| 286 |
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pStateNow->num_xlat++; |
| 287 |
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} |
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/* |
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* Ascii only for this implementation |
| 291 |
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*/ |
| 292 |
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void |
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kstate_add_switcher(char *str) |
| 294 |
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{ |
| 295 |
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K_SWITCH *switcher; |
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| 297 |
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if (str == NULL) |
| 298 |
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return; |
| 299 |
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if (pStateNow->num_switcher >= MAX_SWITCHER) |
| 300 |
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return; |
| 301 |
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switcher = &pStateNow->switcher[pStateNow->num_switcher]; |
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switch (switcher->type = str[0]) { |
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case 'A': /* ascii eg: A;:2 */ |
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switcher->code = str[1]; |
| 305 |
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switcher->nextstate = atoi(&str[3]); |
| 306 |
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break; |
| 307 |
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} |
| 308 |
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switcher->on = 0; |
| 309 |
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pStateNow->num_switcher++; |
| 310 |
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} |
| 311 |
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/* L1 or L0 */ |
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void |
| 314 |
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kstate_set_life(char *str) |
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|
|
{ |
| 316 |
|
|
pStateNow->life = atoi(&str[1]); |
| 317 |
|
|
} |
| 318 |
|
|
|
| 319 |
|
|
unsigned int |
| 320 |
|
|
kstate_cxlat(unsigned int c) |
| 321 |
|
|
{ |
| 322 |
|
|
int i; |
| 323 |
|
|
|
| 324 |
|
|
/* check for ascii switcher */ |
| 325 |
|
|
for (i = 0; i < pStateNow->num_switcher; i++) |
| 326 |
|
|
if (pStateNow->switcher[i].type == 'A' && /* only ascii here */ |
| 327 |
|
|
c == pStateNow->switcher[i].code) { |
| 328 |
|
|
kstate_setcurr(pStateNow->switcher[i].nextstate); |
| 329 |
|
|
pStateNow->switcher[i].on = 1; |
| 330 |
|
|
return ((unsigned int)-1); |
| 331 |
|
|
} |
| 332 |
|
|
/* do translation */ |
| 333 |
|
|
for (i = 0; i < pStateNow->num_xlat; i++) |
| 334 |
|
|
if (c >= pStateNow->xlat[i].first && c <= pStateNow->xlat[i].last) { |
| 335 |
|
|
c = pStateNow->xlat[i].pval[c - pStateNow->xlat[i].first]; |
| 336 |
|
|
break; |
| 337 |
|
|
} |
| 338 |
|
|
/* switch back to previous state if life of current is 1 */ |
| 339 |
|
|
if (pStateNow->life == 1) |
| 340 |
|
|
kstate_setcurr(pStateNow->prev_state); |
| 341 |
|
|
return (c); |
| 342 |
|
|
} |
| 343 |
|
|
|
| 344 |
|
|
#ifdef RXVT |
| 345 |
|
|
void |
| 346 |
|
|
greek_init(void) |
| 347 |
|
|
{ |
| 348 |
|
|
kstate_init_all(GreekMode); |
| 349 |
|
|
} |
| 350 |
|
|
|
| 351 |
|
|
void |
| 352 |
|
|
greek_end(void) |
| 353 |
|
|
{ |
| 354 |
|
|
kstate_end_all(); |
| 355 |
|
|
} |
| 356 |
|
|
|
| 357 |
|
|
void |
| 358 |
|
|
greek_reset(void) |
| 359 |
|
|
{ |
| 360 |
|
|
kstate_reset(); |
| 361 |
|
|
} |
| 362 |
|
|
|
| 363 |
|
|
void |
| 364 |
|
|
greek_setmode(int greek_mode) |
| 365 |
|
|
{ |
| 366 |
|
|
GreekMode = greek_mode; |
| 367 |
|
|
} |
| 368 |
|
|
|
| 369 |
|
|
int |
| 370 |
|
|
greek_getmode(void) |
| 371 |
|
|
{ |
| 372 |
|
|
return (GreekMode); |
| 373 |
|
|
} |
| 374 |
|
|
|
| 375 |
|
|
/* |
| 376 |
|
|
* xlate a given string in-place - return new string length |
| 377 |
|
|
*/ |
| 378 |
|
|
int |
| 379 |
|
|
greek_xlat(char *s, int num_chars) |
| 380 |
|
|
{ |
| 381 |
|
|
int i, count; |
| 382 |
|
|
unsigned int c; |
| 383 |
|
|
|
| 384 |
|
|
for (i = 0, count = 0; i < num_chars; i++) { |
| 385 |
|
|
c = kstate_cxlat((unsigned int)s[i]); |
| 386 |
|
|
if (c != -1) |
| 387 |
|
|
s[count++] = (char)c; |
| 388 |
|
|
} |
| 389 |
|
|
s[count] = '\0'; |
| 390 |
|
|
return (count); |
| 391 |
|
|
|
| 392 |
|
|
} |
| 393 |
|
|
|
| 394 |
|
|
#ifdef TEST |
| 395 |
|
|
int |
| 396 |
|
|
main(void) |
| 397 |
|
|
{ |
| 398 |
|
|
/*char text[] = "abcdef;aGDZXC"; */ |
| 399 |
|
|
char text[] = "abcdef;a:ibgdezhuiklmnjoprstyfxcv"; |
| 400 |
|
|
|
| 401 |
|
|
kstate_init_all(GREEK_ELOT928); |
| 402 |
|
|
printf("text: %s\n", text); |
| 403 |
|
|
greek_xlat(text, strlen(text)); |
| 404 |
|
|
printf("xlat'ed text: %s\n", text); |
| 405 |
|
|
kstate_end_all(); |
| 406 |
|
|
return 0; |
| 407 |
|
|
} |
| 408 |
|
|
#endif |
| 409 |
|
|
#endif /* RXVT */ |
| 410 |
|
|
|
| 411 |
|
|
#endif /* GREEK_SUPPORT */ |
