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- /*-
- * Copyright (c) 1988 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)map3270.c 4.2 (Berkeley) 4/26/91";
- #endif /* not lint */
-
- /* This program reads a description file, somewhat like /etc/termcap,
- that describes the mapping between the current terminal's keyboard and
- a 3270 keyboard.
- */
- #ifdef DOCUMENTATION_ONLY
- /* here is a sample (very small) entry...
-
- # this table is sensitive to position on a line. In particular,
- # a terminal definition for a terminal is terminated whenever a
- # (non-comment) line beginning in column one is found.
- #
- # this is an entry to map tvi924 to 3270 keys...
- v8|tvi924|924|televideo model 924 {
- pfk1 = '\E1';
- pfk2 = '\E2';
- clear = '^z'; # clear the screen
- }
- */
- #endif /* DOCUMENTATION_ONLY */
-
- #include <stdio.h>
- #include <ctype.h>
- #if defined(unix)
- #include <strings.h>
- #else /* defined(unix) */
- #include <string.h>
- #endif /* defined(unix) */
-
- #define IsPrint(c) ((isprint(c) && !isspace(c)) || ((c) == ' '))
-
- #include "state.h"
- #include "map3270.h"
-
- #include "../general/globals.h"
-
- /* this is the list of types returned by the lex processor */
- #define LEX_CHAR 400 /* plain unadorned character */
- #define LEX_ESCAPED LEX_CHAR+1 /* escaped with \ */
- #define LEX_CARETED LEX_ESCAPED+1 /* escaped with ^ */
- #define LEX_END_OF_FILE LEX_CARETED+1 /* end of file encountered */
- #define LEX_ILLEGAL LEX_END_OF_FILE+1 /* trailing escape character */
-
- /* the following is part of our character set dependancy... */
- #define ESCAPE 0x1b
- #define TAB 0x09
- #define NEWLINE 0x0a
- #define CARRIAGE_RETURN 0x0d
-
- typedef struct {
- int type; /* LEX_* - type of character */
- int value; /* character this was */
- } lexicon;
-
- typedef struct {
- int length; /* length of character string */
- char array[500]; /* character string */
- } stringWithLength;
-
- #define panic(s) { fprintf(stderr, s); exit(1); }
-
- static state firstentry = { 0, STATE_NULL, 0, 0 };
- static state *headOfQueue = &firstentry;
-
- /* the following is a primitive adm3a table, to be used when nothing
- * else seems to be avaliable.
- */
-
- #ifdef DEBUG
- static int debug = 0; /* debug flag (for debuggin tables) */
- #endif /* DEBUG */
-
- static int (*GetTc)();
- static int doPaste = 1; /* should we have side effects */
- static int picky = 0; /* do we complain of unknown functions? */
- static char usePointer = 0; /* use pointer, or file */
- static FILE *ourFile= 0;
- static char *environPointer = 0;/* if non-zero, point to input
- * string in core.
- */
- static char **whichkey = 0;
- static char *keysgeneric[] = {
- #include "default.map" /* Define the default default */
-
- 0, /* Terminate list of entries */
- };
- ;
-
- static int Empty = 1, /* is the unget lifo empty? */
- Full = 0; /* is the unget lifo full? */
- static lexicon lifo[200] = { 0 }; /* character stack for parser */
- static int rp = 0, /* read pointer into lifo */
- wp = 0; /* write pointer into lifo */
-
- static int
- GetC()
- {
- int character;
-
- if (usePointer) {
- if ((*environPointer) == 0) {
- /*
- * If we have reached the end of this string, go on to
- * the next (if there is a next).
- */
- if (whichkey == 0) {
- static char suffix = 'A'; /* From environment */
- char envname[9];
- extern char *getenv();
-
- (void) sprintf(envname, "MAP3270%c", suffix++);
- environPointer = getenv(envname);
- } else {
- whichkey++; /* default map */
- environPointer = *whichkey;
- }
- }
- if (*environPointer) {
- character = 0xff&*environPointer++;
- } else {
- character = EOF;
- }
- } else {
- character = getc(ourFile);
- }
- return(character);
- }
-
- static lexicon
- Get()
- {
- lexicon c;
- register lexicon *pC = &c;
- register int character;
-
- if (!Empty) {
- *pC = lifo[rp];
- rp++;
- if (rp == sizeof lifo/sizeof (lexicon)) {
- rp = 0;
- }
- if (rp == wp) {
- Empty = 1;
- }
- Full = 0;
- } else {
- character = GetC();
- switch (character) {
- case EOF:
- pC->type = LEX_END_OF_FILE;
- break;
- case '^':
- character = GetC();
- if (!IsPrint(character)) {
- pC->type = LEX_ILLEGAL;
- } else {
- pC->type = LEX_CARETED;
- if (character == '?') {
- character |= 0x40; /* rubout */
- } else {
- character &= 0x1f;
- }
- }
- break;
- case '\\':
- character = GetC();
- if (!IsPrint(character)) {
- pC->type = LEX_ILLEGAL;
- } else {
- pC->type = LEX_ESCAPED;
- switch (character) {
- case 'E': case 'e':
- character = ESCAPE;
- break;
- case 't':
- character = TAB;
- break;
- case 'n':
- character = NEWLINE;
- break;
- case 'r':
- character = CARRIAGE_RETURN;
- break;
- default:
- pC->type = LEX_ILLEGAL;
- break;
- }
- }
- break;
- default:
- if ((IsPrint(character)) || isspace(character)) {
- pC->type = LEX_CHAR;
- } else {
- pC->type = LEX_ILLEGAL;
- }
- break;
- }
- pC->value = character;
- }
- return(*pC);
- }
-
- static void
- UnGet(c)
- lexicon c; /* character to unget */
- {
- if (Full) {
- fprintf(stderr, "attempt to put too many characters in lifo\n");
- panic("map3270");
- /* NOTREACHED */
- } else {
- lifo[wp] = c;
- wp++;
- if (wp == sizeof lifo/sizeof (lexicon)) {
- wp = 0;
- }
- if (wp == rp) {
- Full = 1;
- }
- Empty = 0;
- }
- }
-
- /*
- * Construct a control character sequence
- * for a special character.
- */
- char *
- uncontrol(c)
- register int c;
- {
- static char buf[3];
-
- if (c == 0x7f)
- return ("^?");
- if (c == '\377') {
- return "-1";
- }
- if (c >= 0x20) {
- buf[0] = c;
- buf[1] = 0;
- } else {
- buf[0] = '^';
- buf[1] = '@'+c;
- buf[2] = 0;
- }
- return (buf);
- }
-
- /* compare two strings, ignoring case */
-
- ustrcmp(string1, string2)
- register char *string1;
- register char *string2;
- {
- register int c1, c2;
-
- while ((c1 = (unsigned char) *string1++) != 0) {
- if (isupper(c1)) {
- c1 = tolower(c1);
- }
- if (isupper(c2 = (unsigned char) *string2++)) {
- c2 = tolower(c2);
- }
- if (c1 < c2) {
- return(-1);
- } else if (c1 > c2) {
- return(1);
- }
- }
- if (*string2) {
- return(-1);
- } else {
- return(0);
- }
- }
-
-
- static stringWithLength *
- GetQuotedString()
- {
- lexicon lex;
- static stringWithLength output = { 0 }; /* where return value is held */
- char *pointer = output.array;
-
- lex = Get();
- if ((lex.type != LEX_CHAR) || (lex.value != '\'')) {
- UnGet(lex);
- return(0);
- }
- while (1) {
- lex = Get();
- if ((lex.type == LEX_CHAR) && (lex.value == '\'')) {
- break;
- }
- if ((lex.type == LEX_CHAR) && !IsPrint(lex.value)) {
- UnGet(lex);
- return(0); /* illegal character in quoted string */
- }
- if (pointer >= output.array+sizeof output.array) {
- return(0); /* too long */
- }
- *pointer++ = lex.value;
- }
- output.length = pointer-output.array;
- return(&output);
- }
-
- #ifdef NOTUSED
- static stringWithLength *
- GetCharString()
- {
- lexicon lex;
- static stringWithLength output;
- char *pointer = output.array;
-
- lex = Get();
-
- while ((lex.type == LEX_CHAR) &&
- !isspace(lex.value) && (lex.value != '=')) {
- *pointer++ = lex.value;
- lex = Get();
- if (pointer >= output.array + sizeof output.array) {
- return(0); /* too long */
- }
- }
- UnGet(lex);
- output.length = pointer-output.array;
- return(&output);
- }
- #endif /* NOTUSED */
-
- static
- GetCharacter(character)
- int character; /* desired character */
- {
- lexicon lex;
-
- lex = Get();
-
- if ((lex.type != LEX_CHAR) || (lex.value != character)) {
- UnGet(lex);
- return(0);
- }
- return(1);
- }
-
- #ifdef NOTUSED
- static
- GetString(string)
- char *string; /* string to get */
- {
- lexicon lex;
-
- while (*string) {
- lex = Get();
- if ((lex.type != LEX_CHAR) || (lex.value != *string&0xff)) {
- UnGet(lex);
- return(0); /* XXX restore to state on entry */
- }
- string++;
- }
- return(1);
- }
- #endif /* NOTUSED */
-
-
- static stringWithLength *
- GetAlphaMericString()
- {
- lexicon lex;
- static stringWithLength output = { 0 };
- char *pointer = output.array;
- # define IsAlnum(c) (isalnum(c) || (c == '_') \
- || (c == '-') || (c == '.'))
-
- lex = Get();
-
- if ((lex.type != LEX_CHAR) || !IsAlnum(lex.value)) {
- UnGet(lex);
- return(0);
- }
-
- while ((lex.type == LEX_CHAR) && IsAlnum(lex.value)) {
- *pointer++ = lex.value;
- lex = Get();
- }
- UnGet(lex);
- *pointer = 0;
- output.length = pointer-output.array;
- return(&output);
- }
-
-
- /* eat up characters until a new line, or end of file. returns terminating
- character.
- */
-
- static lexicon
- EatToNL()
- {
- lexicon lex;
-
- lex = Get();
-
- while (!((lex.type != LEX_ESCAPED) && (lex.type != LEX_CARETED) &&
- (lex.value == '\n')) && (!(lex.type == LEX_END_OF_FILE))) {
- lex = Get();
- }
- if (lex.type != LEX_END_OF_FILE) {
- return(Get());
- } else {
- return(lex);
- }
- }
-
-
- static void
- GetWS()
- {
- lexicon lex;
-
- lex = Get();
-
- while ((lex.type == LEX_CHAR) &&
- (isspace(lex.value) || (lex.value == '#'))) {
- if (lex.value == '#') {
- lex = EatToNL();
- } else {
- lex = Get();
- }
- }
- UnGet(lex);
- }
-
- static void
- FreeState(pState)
- state *pState;
- {
- extern int free();
-
- free((char *)pState);
- }
-
-
- static state *
- GetState()
- {
- state *pState;
- extern char *malloc();
-
- pState = (state *) malloc(sizeof (state));
-
- pState->result = STATE_NULL;
- pState->next = 0;
-
- return(pState);
- }
-
-
- static state *
- FindMatchAtThisLevel(pState, character)
- state *pState;
- int character;
- {
- while (pState) {
- if (pState->match == character) {
- return(pState);
- }
- pState = pState->next;
- }
- return(0);
- }
-
-
- static state *
- PasteEntry(head, string, count, identifier)
- state *head; /* points to who should point here... */
- char *string; /* which characters to paste */
- int count; /* number of character to do */
- char *identifier; /* for error messages */
- {
- state *pState, *other;
-
- if (!doPaste) { /* flag to not have any side effects */
- return((state *)1);
- }
- if (!count) {
- return(head); /* return pointer to the parent */
- }
- if ((head->result != STATE_NULL) && (head->result != STATE_GOTO)) {
- /* this means that a previously defined sequence is an initial
- * part of this one.
- */
- fprintf(stderr, "Conflicting entries found when scanning %s\n",
- identifier);
- return(0);
- }
- # ifdef DEBUG
- if (debug) {
- fprintf(stderr, "%s", uncontrol(*string));
- }
- # endif /* DEBUG */
- pState = GetState();
- pState->match = *string;
- if (head->result == STATE_NULL) {
- head->result = STATE_GOTO;
- head->address = pState;
- other = pState;
- } else { /* search for same character */
- if ((other = FindMatchAtThisLevel(head->address, *string)) != 0) {
- FreeState(pState);
- } else {
- pState->next = head->address;
- head->address = pState;
- other = pState;
- }
- }
- return(PasteEntry(other, string+1, count-1, identifier));
- }
-
- static
- GetInput(tc, identifier)
- int tc;
- char *identifier; /* entry being parsed (for error messages) */
- {
- stringWithLength *outputString;
- state *head;
- state fakeQueue;
-
- if (doPaste) {
- head = headOfQueue; /* always points to level above this one */
- } else {
- head = &fakeQueue; /* don't have any side effects... */
- }
-
- if ((outputString = GetQuotedString()) == 0) {
- return(0);
- } else if (IsPrint(outputString->array[0])) {
- fprintf(stderr,
- "first character of sequence for %s is not a control type character\n",
- identifier);
- return(0);
- } else {
- if ((head = PasteEntry(head, outputString->array,
- outputString->length, identifier)) == 0) {
- return(0);
- }
- GetWS();
- while ((outputString = GetQuotedString()) != 0) {
- if ((head = PasteEntry(head, outputString->array,
- outputString->length, identifier)) == 0) {
- return(0);
- }
- GetWS();
- }
- }
- if (!doPaste) {
- return(1);
- }
- if ((head->result != STATE_NULL) && (head->result != tc)) {
- /* this means that this sequence is an initial part
- * of a previously defined one.
- */
- fprintf(stderr, "Conflicting entries found when scanning %s\n",
- identifier);
- return(0);
- } else {
- head->result = tc;
- return(1); /* done */
- }
- }
-
- static
- GetDefinition()
- {
- stringWithLength *string;
- int Tc;
-
- GetWS();
- if ((string = GetAlphaMericString()) == 0) {
- return(0);
- }
- string->array[string->length] = 0;
- if (doPaste) {
- if ((Tc = (*GetTc)(string->array)) == -1) {
- if (picky) {
- fprintf(stderr, "%s: unknown 3270 key identifier\n",
- string->array);
- }
- Tc = STATE_NULL;
- }
- } else {
- Tc = STATE_NULL; /* XXX ? */
- }
- GetWS();
- if (!GetCharacter('=')) {
- fprintf(stderr,
- "Required equal sign after 3270 key identifier %s missing\n",
- string->array);
- return(0);
- }
- GetWS();
- if (!GetInput(Tc, string->array)) {
- fprintf(stderr, "Missing definition part for 3270 key %s\n",
- string->array);
- return(0);
- } else {
- GetWS();
- while (GetCharacter('|')) {
- # ifdef DEBUG
- if (debug) {
- fprintf(stderr, " or ");
- }
- # endif /* DEBUG */
- GetWS();
- if (!GetInput(Tc, string->array)) {
- fprintf(stderr, "Missing definition part for 3270 key %s\n",
- string->array);
- return(0);
- }
- GetWS();
- }
- }
- GetWS();
- if (!GetCharacter(';')) {
- fprintf(stderr, "Missing semi-colon for 3270 key %s\n", string->array);
- return(0);
- }
- # ifdef DEBUG
- if (debug) {
- fprintf(stderr, ";\n");
- }
- # endif /* DEBUG */
- return(1);
- }
-
-
- static
- GetDefinitions()
- {
- if (!GetDefinition()) {
- return(0);
- } else {
- while (GetDefinition()) {
- ;
- }
- }
- return(1);
- }
-
- static
- GetBegin()
- {
- GetWS();
- if (!GetCharacter('{')) {
- return(0);
- }
- return(1);
- }
-
- static
- GetEnd()
- {
- GetWS();
- if (!GetCharacter('}')) {
- return(0);
- }
- return(1);
- }
-
- static
- GetName()
- {
- if (!GetAlphaMericString()) {
- return(0);
- }
- GetWS();
- while (GetAlphaMericString()) {
- GetWS();
- }
- return(1);
- }
-
- static
- GetNames()
- {
- GetWS();
- if (!GetName()) {
- return(0);
- } else {
- GetWS();
- while (GetCharacter('|')) {
- GetWS();
- if (!GetName()) {
- return(0);
- }
- }
- }
- return(1);
- }
-
- static
- GetEntry0()
- {
- if (!GetBegin()) {
- fprintf(stderr, "no '{'\n");
- return(0);
- } else if (!GetDefinitions()) {
- fprintf(stderr, "unable to parse the definitions\n");
- return(0);
- } else if (!GetEnd()) {
- fprintf(stderr, "No '}' or scanning stopped early due to error.\n");
- return(0);
- } else {
- /* done */
- return(1);
- }
- }
-
-
- static
- GetEntry()
- {
- if (!GetNames()) {
- fprintf(stderr, "Invalid name field in entry.\n");
- return(0);
- } else {
- return(GetEntry0());
- }
- }
-
- /* position ourselves within a given filename to the entry for the current
- * KEYBD (or TERM) variable
- */
-
- Position(filename, keybdPointer)
- char *filename;
- char *keybdPointer;
- {
- lexicon lex;
- stringWithLength *name = 0;
- stringWithLength *oldName;
- # define Return(x) {doPaste = 1; return(x);}
-
- doPaste = 0;
-
- if ((ourFile = fopen(filename, "r")) == NULL) {
- # if !defined(MSDOS)
- fprintf(stderr, "Unable to open file %s\n", filename);
- # endif /* !defined(MSDOS) */
- Return(0);
- }
- lex = Get();
- while (lex.type != LEX_END_OF_FILE) {
- UnGet(lex);
- /* now, find an entry that is our type. */
- GetWS();
- oldName = name;
- if ((name = GetAlphaMericString()) != 0) {
- if (!ustrcmp(name->array, keybdPointer)) {
- /* need to make sure there is a name here... */
- lex.type = LEX_CHAR;
- lex.value = 'a';
- UnGet(lex);
- Return(1);
- }
- } else if (GetCharacter('|')) {
- ; /* more names coming */
- } else {
- lex = Get();
- UnGet(lex);
- if (lex.type != LEX_END_OF_FILE) {
- if (!GetEntry0()) { /* start of an entry */
- fprintf(stderr,
- "error was in entry for %s in file %s\n",
- (oldName)? oldName->array:"(unknown)", filename);
- Return(0);
- }
- }
- }
- lex = Get();
- }
- #if !defined(MSDOS)
- fprintf(stderr, "Unable to find entry for %s in file %s\n", keybdPointer,
- filename);
- #endif /* !defined(MSDOS) */
- Return(0);
- }
-
- char *
- strsave(string)
- char *string;
- {
- char *p;
- extern char *malloc();
-
- p = malloc((unsigned int)strlen(string)+1);
- if (p != 0) {
- strcpy(p, string);
- }
- return(p);
- }
-
-
- /*
- * InitControl - our interface to the outside. What we should
- * do is figure out keyboard (or terminal) type, set up file pointer
- * (or string pointer), etc.
- */
-
- state *
- InitControl(keybdPointer, pickyarg, translator)
- char *keybdPointer;
- int pickyarg; /* Should we be picky? */
- int (*translator)(); /* Translates ascii string to integer */
- {
- extern char *getenv();
- int GotIt;
-
- picky = pickyarg;
- GetTc = translator;
-
- if (keybdPointer == 0) {
- keybdPointer = getenv("KEYBD");
- }
- if (keybdPointer == 0) {
- keybdPointer = getenv("TERM");
- }
-
- /*
- * Some environments have getenv() return
- * out of a static area. So, save the keyboard name.
- */
- if (keybdPointer) {
- keybdPointer = strsave(keybdPointer);
- }
- environPointer = getenv("MAP3270");
- if (environPointer
- && (environPointer[0] != '/')
- #if defined(MSDOS)
- && (environPointer[0] != '\\')
- #endif /* defined(MSDOS) */
- && (strncmp(keybdPointer, environPointer,
- strlen(keybdPointer) != 0)
- || (environPointer[strlen(keybdPointer)] != '{'))) /* } */
- {
- environPointer = 0;
- }
-
- if ((!environPointer)
- #if defined(MSDOS)
- || (*environPointer == '\\')
- #endif /* defined(MSDOS) */
- || (*environPointer == '/')) {
- usePointer = 0;
- GotIt = 0;
- if (!keybdPointer) {
- #if !defined(MSDOS)
- fprintf(stderr, "%s%s%s%s",
- "Neither the KEYBD environment variable nor the TERM ",
- "environment variable\n(one of which is needed to determine ",
- "the type of keyboard you are using)\n",
- "is set. To set it, say 'setenv KEYBD <type>'\n");
- #endif /* !defined(MSDOS) */
- } else {
- if (environPointer) {
- GotIt = Position(environPointer, keybdPointer);
- }
- if (!GotIt) {
- GotIt = Position("/etc/map3270", keybdPointer);
- }
- }
- if (!GotIt) {
- if (environPointer) {
- GotIt = Position(environPointer, "unknown");
- }
- if (!GotIt) {
- GotIt = Position("/etc/map3270", keybdPointer);
- }
- }
- if (!GotIt) {
- #if !defined(MSDOS)
- fprintf(stderr, "Using default key mappings.\n");
- #endif /* !defined(MSDOS) */
- usePointer = 1; /* flag use of non-file */
- whichkey = keysgeneric;
- environPointer = *whichkey; /* use default table */
- }
- } else {
- usePointer = 1;
- }
- (void) GetEntry();
- return(firstentry.address);
- }
-