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RetroZilla/extensions/xmlterm/lineterm/ltermPrivate.h
Ryan Nematz 2f2ae146c0 first commit
2015-10-20 23:03:22 -04:00

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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is lineterm.
*
* The Initial Developer of the Original Code is
* Ramalingam Saravanan.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* ltermPrivate.h: Line terminal (LTERM) private header file
* LTERM provides a "stream" interface to an XTERM-like terminal,
* using line input/output.
* CPP options:
* LINUX: for Linux2.0/glibc
* SOLARIS: for Solaris2.6
* BSDFAMILY: for FreeBSD, ...
* DEBUG_LTERM: to enable some debugging output
* NO_PTY: force use of pipes rather than PTY for process
* communication
* MOZILLA_CLIENT: set if embedded in Mozilla
* USE_NSPR_BASE: use basic NSPR API (excluding I/O and process creation)
* USE_NSPR_LOCK: use NSPR lock API instead of Unix mutex API
* USE_NSPR_IO: use NSPR I/O and process API instead of Unix API
* (current implementation of pseudo-TTY is incompatible with
* the NSPR I/O API; set the USE_NSPR_IO option only on platforms
* where PTYSTREAM is not implemented)
*/
#ifndef _LTERMPRIVATE_H
#define _LTERMPRIVATE_H 1
/* Standard C header files */
#include <string.h>
/* public declarations */
#include "lineterm.h"
#include "tracelog.h"
/* private declarations */
/* Force use of basic NSPR API if MOZILLA_CLIENT or USE_NSPR_IO are defined */
#if defined(MOZILLA_CLIENT) || defined(USE_NSPR_IO)
#define USE_NSPR_BASE 1
#endif
/* pseudo-TTY stream interface */
#include "ptystream.h"
#define LTERM_ERROR TLOG_ERROR
#define LTERM_WARNING TLOG_WARNING
#define LTERM_LOG(procname,level,args) TLOG_PRINT(LTERM_TLOG_MODULE,procname,level,args)
#define LTERM_LOGUNICODE(procname,level,args) TLOG_UNICHAR(LTERM_TLOG_MODULE,procname,level,args)
#ifdef USE_NSPR_BASE /* Use basic NSPR API (excluding I/O) */
#include "nspr.h"
#define assert PR_ASSERT
#define int32 PRInt32
#define getenv PR_GetEnv
#define MALLOC(x) PR_Malloc(x)
#define REALLOC(x,y) PR_Realloc((x),(y))
#define CALLOC(x,y) PR_Calloc((x),(y))
#define FREE(x) PR_Free(x)
#else /* not USE_NSPR_BASE */
#include <assert.h>
#define int32 long
#define MALLOC(x) malloc(x)
#define REALLOC(x,y) realloc((x),(y))
#define CALLOC(x,y) calloc((x),(y))
#define FREE(x) free(x)
#endif /* not USE_NSPR_BASE */
#ifdef USE_NSPR_IO /* Use NSPR I/O API (no PTY implementation) */
typedef PRFileDesc *FILEDESC;
#define NULL_FILEDESC 0
#define VALID_FILEDESC(x) (x != 0)
typedef PRFileDesc FILESTREAM;
#define SIZE_T PRInt32
#define WRITE PR_Write
#define READ PR_Read
#define CLOSE(x) (PR_Close(x) != PR_SUCCESS)
#define PIPE(x) (PR_CreatePipe((x),(x)+1) != PR_SUCCESS)
#define POLL(x,y,z) PR_Poll((x),(y),(z))
#define POLLFD PRPollDesc
#define POLL_EVENTS in_flags
#define POLL_REVENTS out_flags
#define POLL_READ PR_POLL_READ
#define PROCESS PRProcess *
#define NULL_PROCESS 0
#define VALID_PROCESS(x) (x != 0)
#else /* not USE_NSPR_IO */
/* system header files */
#include <unistd.h>
#include <signal.h>
/* Diagnostic/debugging files */
#include <stdio.h>
#include <errno.h>
#include <stdarg.h>
#if defined(SOLARIS)
#include <poll.h>
#else
#include <sys/poll.h>
#endif
typedef int FILEDESC;
#define NULL_FILEDESC -1
#define VALID_FILEDESC(x) (x >= 0)
typedef FILE FILESTREAM;
#define SIZE_T size_t
#define WRITE write
#define READ read
#define CLOSE(x) close(x)
#define PIPE(x) pipe(x)
#define POLL(x,y,z) poll((x),(y),(z))
#define POLLFD pollfd
#define POLL_EVENTS events
#define POLL_REVENTS revents
#define POLL_READ POLLIN
#define PROCESS long
#define NULL_PROCESS 0
#define VALID_PROCESS(x) (x > 0)
#endif /* not USE_NSPR_IO */
#ifdef USE_NSPR_LOCK /* Use NSPR lock API */
#define MUTEX_DECLARE(x) PRLock *x
#define MUTEX_INITIALIZE(x) ((x=PR_NewLock()) == NULL)
#define MUTEX_LOCK(x) PR_Lock(x)
#define MUTEX_UNLOCK(x) PR_Unlock(x)
#define MUTEX_DESTROY(x) PR_DestroyLock(x)
#define THREAD_DECLARE(x) PRThread *x
#define THREAD_CREATE ((x=PR_CreateThread(PR_USER_THREAD, (y), (z), \
PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD, \
PR_JOINABLE_THREAD, 0)) == NULL)
#define THREAD_SELF PR_GetCurrentThread
#define THREAD_EQUAL(x,y) ((x) == (y))
#define THREAD_JOIN(x) (PR_JoinThread(x) != PR_SUCCESS)
#else /* not USE_NSPR_LOCK */
#include <pthread.h>
#define MUTEX_DECLARE(x) pthread_mutex_t x
#define MUTEX_INITIALIZE(x) pthread_mutex_init(&(x), NULL)
#define MUTEX_LOCK(x) pthread_mutex_lock(&(x))
#define MUTEX_UNLOCK(x) pthread_mutex_unlock(&(x))
#define MUTEX_DESTROY(x) pthread_mutex_destroy(&(x))
#define THREAD_DECLARE(x) pthread_t x
#define THREAD_CREATE(x,y,z) pthread_create(&(x),NULL,(y),(z))
#define THREAD_SELF pthread_self
#define THREAD_EQUAL(x,y) pthread_equal(x,y)
#define THREAD_JOIN(x) pthread_join((x),NULL)
#endif /* not USE_NSPR_LOCK */
#define MAXTERM 256 /* Maximum number of LTERMs;
* affects static memory "footprint"
*/
#define MAXCOL 4096 /* Maximum columns in line buffer;
* affects static memory "footprint";
* the only limitation on this value is that
* it must fit into a UNICHAR, because of the
* way lterm_write and ltermWrite implement
* the input buffer pipe.
*/
#define MAXROW 1024 /* Maximum rows in screen;
* primarily affects dynamically allocated
* memory
*/
/* The only obvious limitation on the following is that they should be
* significantly less than MAXCOL
*/
#define MAXPROMPT 256 /* Maximum length of prompt regexp+1 */
#define MAXRAWINCOMPLETE 5 /* Maximum incomplete raw buffer size */
#define MAXSTREAMTERM 11 /* Maximum stream terminator buffer size */
#define MAXCOOKIESTR 64 /* Maximum length of cookie string+1 */
#define MAXESCAPEPARAMS 16 /* Maximum no. of numeric ESCAPE parameters */
#define MAXSTRINGPARAM 512 /* Maximum length of string ESCAPE parameters */
#define MAXSHELLINITCMD 2 /* Maximum no. of shell init commands */
#define MAXSHELLINITSTR 256 /* Maximum length of shell init string+1 */
#define MAXPTYIN 128 /* 1/2 POSIX minimum MAX_INPUT for PTY */
#define MAXCOLM1 (MAXCOL-1) /* Maximum columns in line buffer - 1 */
#define MAXTTYCONTROL 8 /* Maximum TTY control character list */
#define TTYINTERRUPT 0
#define TTYERASE 1
#define TTYKILL 2
#define TTYEOF 3
#define TTYSUSPEND 4
#define TTYREPRINT 5
#define TTYDISCARD 6
#define TTYWERASE 7
/* input modes */
#define LTERM0_RAW_MODE 0
#define LTERM1_CANONICAL_MODE 1
#define LTERM2_EDIT_MODE 2
#define LTERM3_COMPLETION_MODE 3
/* completion request codes */
#define LTERM_NO_COMPLETION 0
#define LTERM_TAB_COMPLETION 1
#define LTERM_HISTORY_COMPLETION 2
/* output modes */
#define LTERM0_STREAM_MODE 0
#define LTERM1_SCREEN_MODE 1
#define LTERM2_LINE_MODE 2
/* character/line action codes */
#define LTERM_INSERT_ACTION 0
#define LTERM_DELETE_ACTION 1
#define LTERM_ERASE_ACTION 2
/* List of characters escaped in XML */
#define LTERM_AMP_ESCAPE 0
#define LTERM_LT_ESCAPE 1
#define LTERM_GT_ESCAPE 2
#define LTERM_QUOT_ESCAPE 3
#define LTERM_APOS_ESCAPE 4
#define LTERM_XML_ESCAPES 5
#define LTERM_PLAIN_ESCAPES 3
/* Maximum no. of characters in an XML escape sequence (excluding NUL) */
#define LTERM_MAXCHAR_ESCAPE 6
/* input buffer pipe header "character" count */
#define PIPEHEADER 2
/* input buffer pipe header components */
#define PHDR_CHARS 0
#define PHDR_TYPE 1
/* LTERM read in/out parameter structure */
struct LtermRead {
UNICHAR *buf; /* Pointer to Unicode character buffer (IN param) */
UNISTYLE *style; /* Pointer to character style buffer (IN param) */
int max_count; /* max. number of characters in buffers (IN param) */
int read_count; /* actual number of characters in buffers */
int opcodes; /* Returned opcodes */
int opvals; /* Returned opvalues */
int buf_row; /* row at which to display buffer data */
int buf_col; /* starting column at which to display buffer data */
int cursor_row; /* final cursor row position */
int cursor_col; /* final cursor column position */
};
/* LTERM input structure: managed by lterm_write */
struct LtermInput {
UNICHAR inputBuf[PIPEHEADER+MAXCOL]; /* holds data read from input buffer
* pipe
*/
int inputBufBytes; /* Count of bytes already read in */
int inputMode; /* input mode:
* 0 = raw mode
* 1 = canonical mode
* 2 = edit + canonical mode
* 3 = completion + edit + canonical mode
*/
int escapeFlag; /* processing ESCAPE in line mode */
int escapeCSIFlag; /* processing ESCAPE Code Sequence Introducer */
int escapeCSIArg; /* ESCAPE Code Sequence Argument value */
int inputOpcodes; /* input opcodes */
int clearInputLine; /* true if input line buffer needs to be
* cleared (after echoing) */
UNICHAR inputLine[MAXCOL]; /* input line buffer:
only MAXCOL-1 characters should actually
be inserted in the buffer, to allow
one character padding if necessary */
int inputChars; /* length of input line (characters);
* should never exceed MAXCOL-1,
* to allow for null termination
*/
int inputCols; /* number of displayed columns in input line;
* a column corresponds to a single
* plain text character transmitted to the
* subordinate process, although it may occupy
* multiple character positions, e.g.,
* e.g., &lt represents "<"
*/
int inputGlyphs; /* number of displayed glyphs in input line;
* a glyph corresponds to a logical column
* on the layout, i.e., a single Unicode
* character or an XML element, such as an
* iconic representiion of an URI.
*/
unsigned short inputColCharIndex[MAXCOL]; /* starting character index of
* each column, including the
* cursor column at end of line.
* (inputCols+1 values should be
* defined)
*/
unsigned short inputGlyphCharIndex[MAXCOL]; /* starting character index
* of each glyph, including
* empty glyph at the end of
* the line.
* (inputGlyphs+1 values
* should be defined)
*/
unsigned short inputGlyphColIndex[MAXCOL]; /* starting column index of
* each glyph
* (inputGlyphs+1 values)
*/
int inputCursorGlyph; /* current input cursor glyph number (>=0) */
};
/* LtermOutput poll structure index count and values */
#define POLL_COUNT 3
#define POLL_INPUTBUF 0
#define POLL_STDOUT 1
#define POLL_STDERR 2
/* LTERM output structure: managed by lterm_read */
struct LtermOutput {
struct POLLFD pollFD[POLL_COUNT]; /* output polling structure */
long callbackTag[POLL_COUNT]; /* GTK callback tag for each FD (0 if none) */
int nfds; /* count of "files" to be polled */
int outputMode; /* output mode:
* 0 = full screen mode
* 1 = line mode
* 2 = command line mode
*/
UNICHAR streamTerminator[MAXSTREAMTERM]; /* stream terminator buffer */
int streamOpcodes; /* Stream opcodes */
int savedOutputMode; /* saved output mode (prior to stream mode) */
int insertMode; /* character insert mode */
int automaticNewline; /* automatic newline mode */
UNISTYLE styleMask; /* current output style mask */
char rawOUTBuf[MAXRAWINCOMPLETE]; /* incomplete raw STDOUT buffer */
int rawOUTBytes; /* incomplete raw STDOUT byte count */
char rawERRBuf[MAXRAWINCOMPLETE]; /* incomplete raw STDERR buffer */
int rawERRBytes; /* incomplete raw STDERR byte count */
UNICHAR decodedOutput[MAXCOL]; /* decoded output buffer:
only MAXCOL-1 characters should actually
be inserted in the buffer, to allow
one character padding if necessary */
UNISTYLE decodedStyle[MAXCOL]; /* decoded output style buffer */
int decodedChars; /* decoded character count;
should never exceed MAXCOL-1 */
int incompleteEscapeSequence; /* Incomplete ESCAPE sequence flag */
UNICHAR outputLine[MAXCOL]; /* output line buffer (processed);
only MAXCOL-1 characters should actually
be inserted in the buffer, to allow
one character padding if necessary */
UNISTYLE outputStyle[MAXCOL]; /* output style buffer for each character */
int outputChars; /* length of output line (characters)
should never exceed MAXCOL-1 */
int outputCursorChar; /* output cursor character position (>=0) */
int promptChars; /* prompt character count */
int outputModifiedChar; /* leftmost modified character in output line */
int cursorRow, cursorCol; /* screen cursor row and column */
int returnedCursorRow, returnedCursorCol;
/* returned screen cursor row and column */
int topScrollRow, botScrollRow; /* top and bottom scrolling rows */
int modifiedCol[MAXROW]; /* first modified column in each row;
-1 if no column has been modified */
UNICHAR *screenChar; /* Screen character array (nRows*nCols long) */
UNISTYLE *screenStyle; /* Screen style array (nRows*nCols long) */
};
/* LTERM process structure: managed by lterm_create, lterm_close */
struct LtermProcess {
PROCESS processID; /* process ID */
FILEDESC processIN; /* process input pipe */
FILEDESC processOUT; /* process output pipe */
FILEDESC processERR; /* process error pipe */
};
/* line terminal (LTERM) structure: managed by lterm_open, lterm_close */
struct lterms {
int opened; /* LTERM opened status flag */
int suspended; /* LTERM suspended flag:
* an LTERM is suspended when an error
* occurs, to prevent further I/O operations
* which have unpredictable results.
* The LTERM still needs to be closed to
* release any resources used by it.
* (a suspended LTERM is still open)
*/
MUTEX_DECLARE(adminMutex); /* LTERM administrative mutex */
MUTEX_DECLARE(outputMutex); /* LTERM output thread mutex */
int adminMutexLocked; /* administrative mutex lock status */
int outputMutexLocked; /* output mutex lock status */
FILEDESC writeBUFFER, readBUFFER; /* input character BUFFER pipe */
int options; /* TTY options */
int ptyMode; /* pseudo-TTY mode flag */
int noTTYEcho; /* no TTY echo flag */
int disabledInputEcho; /* disabled input echo flag */
int restoreInputEcho; /* restore input echo flag */
int processType; /* Process type code */
int maxInputMode; /* maximum allowed input mode value */
int readERRfirst; /* Read STDERR before STDOUT */
int interleave; /* interleave STDERR/STDOUT flag */
UNICHAR control[MAXTTYCONTROL]; /* TTY control characters */
int commandNumber; /* output command number
* (0 if not command line)
*/
unsigned short lastCommandNum; /* last command number */
int completionRequest; /* command completion request code:
* LTERM_NO_COMPLETION, or
* LTERM_TAB_COMPLETION, or
* LTERM_HISTORY_COMPLETION
*/
int completionChars; /* command completion insert count */
int inputBufRecord; /* True if input buffer contains record */
int inputLineBreak; /* True if input line was transmitted
* and plain text copy saved in echo buffer
*/
UNICHAR echoLine[MAXCOL]; /* Plain text of echo line */
int echoChars; /* Count of echo characters */
int nRows; /* Number of rows */
int nCols; /* Number of columns */
int xPixels; /* Number of X pixels in screen */
int yPixels; /* Number of Y pixels in screen */
UNICHAR promptRegexp[MAXPROMPT]; /* prompt regular expression
JUST A LIST OF DELIMITERS AT PRESENT */
char cookie[MAXCOOKIESTR]; /* cookie string */
char shellInitStr[MAXSHELLINITCMD][MAXSHELLINITSTR];
/* shell initialization strings */
int shellInitCommands; /* shell init command count */
struct ptys pty; /* pseudo-tty (PTY) stream info for LTERM */
struct LtermProcess ltermProcess; /* LTERM process structure */
struct LtermInput ltermInput; /* LTERM input structure */
struct LtermOutput ltermOutput; /* LTERM output structure */
};
/* LTERM global variables */
typedef struct {
int initialized; /* Initialization flag */
struct lterms *termList[MAXTERM]; /* List of LTERMS */
MUTEX_DECLARE(listMutex); /* Thread lock to access to LTERM list */
UNICHAR metaDelimiter; /* Meta command delimiter (usually :) */
char escapeChars[LTERM_XML_ESCAPES+1]; /* String of chars escaped in XML */
UNICHAR escapeSeq[LTERM_XML_ESCAPES][LTERM_MAXCHAR_ESCAPE+1];
/* XML character escape sequences */
int escapeLen[LTERM_XML_ESCAPES]; /* XML char. escape sequence lengths */
} LtermGlobal;
extern LtermGlobal ltermGlobal;
/* Visible prototypes */
/* ltermIO.c */
int ltermInterruptOutput(struct lterms *lts);
int ltermSendLine(struct lterms *lts, UNICHAR uch,
int echoControl, int completionCode);
int ltermRead(struct lterms *lts, struct LtermRead *ltr, int timeout);
/* ltermInput.c */
int ltermPlainTextInput(struct lterms *lts,
const UNICHAR *buf, int count, int *opcodes);
int ltermCancelCompletion(struct lterms *lts);
int ltermInsertChar(struct LtermInput *lti, UNICHAR uch);
void ltermSwitchToRawMode(struct lterms *lts);
void ltermClearInputLine(struct lterms *lts);
int ltermDeleteGlyphs(struct LtermInput *lti, int count);
int ltermSendData(struct lterms *lts, const UNICHAR *buf, int count);
int ltermSendChar(struct lterms *lts, const char *buf, int count);
/* ltermOutput.c */
int ltermProcessOutput(struct lterms *lts, int *opcodes, int *opvals,
int *oprow);
int ltermReceiveData(struct lterms *lts, int readERR);
void ltermClearOutputLine(struct lterms *lts);
int ltermClearOutputScreen(struct lterms *lts);
int ltermSwitchToStreamMode(struct lterms *lts, int streamOpcodes,
const UNICHAR *streamTerminator);
int ltermSwitchToScreenMode(struct lterms *lts);
int ltermSwitchToLineMode(struct lterms *lts);
/* ltermEscape.c */
int ltermProcessEscape(struct lterms *lts, const UNICHAR *buf,
int count, const UNISTYLE *style, int *consumed,
int *opcodes, int *opvals, int *oprow);
int ltermInsDelEraseChar(struct lterms *lts, int count, int action);
int ltermInsDelEraseLine(struct lterms *lts, int count, int row, int action);
#endif /* _LTERMPRIVATE_H */
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