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ckUtil.c
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1289 lines (1183 loc) · 33.8 KB
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/*
* ckUtil.c --
*
* Miscellaneous utility functions.
*
* Copyright (c) 1995 Christian Werner.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "ckPort.h"
#include "ck.h"
#if CK_USE_UTF
#include <wchar.h>
#endif
#define REPLACE 1
#define NORMAL 2
#define TAB 3
#define NEWLINE 4
#define GCHAR 5
struct charType {
char type; /* Type of char, see definitions above. */
char width; /* Width if replaced by backslash sequence. */
};
struct charEncoding {
char *name; /* Name for this encoding table. */
struct charType ct[256]; /* Encoding table. */
};
/*
* For ISO8859, codes 0x81..0x99 are mapped to ACS characters
* according to this table:
*/
static char *gcharTab[] = {
"ulcorner", "llcorner", "urcorner", "lrcorner",
"ltee", "rtee", "btee", "ttee",
"hline", "vline", "plus", "s1",
"s9", "diamond", "ckboard", "degree",
"plminus", "bullet", "larrow", "rarrow",
"darrow", "uarrow", "board", "lantern",
"block"
};
static struct charEncoding EncodingTable[] = {
/*
*----------------------------------------------------------------------
*
* ISO 8859 encoding.
*
*----------------------------------------------------------------------
*/
{
"ISO8859", {
{ REPLACE, 4 }, /* \x00 */
{ REPLACE, 4 }, /* \x01 */
{ REPLACE, 4 }, /* \x02 */
{ REPLACE, 4 }, /* \x03 */
{ REPLACE, 4 }, /* \x04 */
{ REPLACE, 4 }, /* \x05 */
{ REPLACE, 4 }, /* \x06 */
{ REPLACE, 4 }, /* \x07 */
{ REPLACE, 2 }, /* \b */
{ TAB, 2 }, /* \t */
{ NEWLINE, 2 }, /* \n */
{ REPLACE, 4 }, /* \x0b */
{ REPLACE, 2 }, /* \f */
{ REPLACE, 2 }, /* \r */
{ REPLACE, 4 }, /* 0x0e */
{ REPLACE, 4 }, /* 0x0f */
/* 0x10 .. 0x1f */
{ REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 },
{ REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 },
{ REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 },
{ REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 },
/* ' ' .. '/' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* '0' .. '?' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* '@' .. 'O' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 'P' .. '_' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* '`' .. 'o' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 'p' .. '~' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ REPLACE, 4 }, /* 0x7f */
/* 0x80 .. 0x8f */
{ REPLACE, 4 }, { GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 },
{ GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 },
{ GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 },
{ GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 },
/* 0x90 .. 0x9f */
{ GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 },
{ GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 }, { GCHAR, 1 },
{ GCHAR, 1 }, { GCHAR, 1 }, { REPLACE, 4 }, { REPLACE, 4 },
{ REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 },
/* 0xa0 .. 0xaf */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xb0 .. 0xbf */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xc0 .. 0xcf */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xd0 .. 0xdf */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xe0 .. 0xef */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xf0 .. 0xff */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
}
},
/*
*----------------------------------------------------------------------
*
* IBM code page 437 encoding.
*
*----------------------------------------------------------------------
*/
{
"IBM437", {
{ REPLACE, 4 }, /* \x00 */
{ REPLACE, 4 }, /* \x01 */
{ REPLACE, 4 }, /* \x02 */
{ REPLACE, 4 }, /* \x03 */
{ REPLACE, 4 }, /* \x04 */
{ REPLACE, 4 }, /* \x05 */
{ REPLACE, 4 }, /* \x06 */
{ REPLACE, 4 }, /* \x07 */
{ REPLACE, 2 }, /* \b */
{ TAB, 2 }, /* \t */
{ NEWLINE, 2 }, /* \n */
{ REPLACE, 4 }, /* \x0b */
{ REPLACE, 2 }, /* \f */
{ REPLACE, 2 }, /* \r */
{ REPLACE, 4 }, /* 0x0e */
{ REPLACE, 4 }, /* 0x0f */
/* 0x10 .. 0x1f */
{ REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 },
{ REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 },
{ REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 },
{ REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 }, { REPLACE, 4 },
/* ' ' .. '/' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* '0' .. '?' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* '@' .. 'O' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 'P' .. '_' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* '`' .. 'o' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 'p' .. '~' */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ REPLACE, 4 }, /* 0x7f */
/* 0x80 .. 0x8f */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0x90 .. 0x9a */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, /* 0x9b */
/* 0x9c .. 0x9f */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xa0 .. 0xaf */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xb0 .. 0xbf */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xc0 .. 0xcf */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xd0 .. 0xdf */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xe0 .. 0xef */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
/* 0xf0 .. 0xff */
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 },
{ NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }, { NORMAL, 1 }
}
}
};
/*
* This is the switch for char encoding.
*/
static int Encoding = 0;
#define CHARTYPE(x) EncodingTable[Encoding].ct[(x)]
/*
* Characters used when displaying control sequences.
*/
static char hexChars[] = "0123456789abcdefxtnvr\\";
/*
* The following table maps some control characters to sequences
* like '\n' rather than '\x10'. A zero entry in the table means
* no such mapping exists, and the table only maps characters
* less than 0x10.
*/
static char mapChars[] = {
0, 0, 0, 0, 0, 0, 0, 0,
'b', 't', 'n', 0, 'f', 'r', 0
};
/*
*----------------------------------------------------------------------
*
* CkCopyAndGlobalEval --
*
* This procedure makes a copy of a script then calls Tcl_GlobalEval
* to evaluate it. It's used in situations where the execution of
* a command may cause the original command string to be reallocated.
*
* Results:
* Returns the result of evaluating script, including both a standard
* Tcl completion code and a string in interp->result.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
CkCopyAndGlobalEval(interp, script)
Tcl_Interp *interp; /* Interpreter in which to evaluate
* script. */
char *script; /* Script to evaluate. */
{
Tcl_DString buffer;
int code;
Tcl_DStringInit(&buffer);
Tcl_DStringAppend(&buffer, script, -1);
code = Tcl_GlobalEval(interp, Tcl_DStringValue(&buffer));
Tcl_DStringFree(&buffer);
return code;
}
/*
*----------------------------------------------------------------------
*
* Ck_GetScrollInfo --
*
* This procedure is invoked to parse "xview" and "yview"
* scrolling commands for widgets using the new scrolling
* command syntax ("moveto" or "scroll" options).
*
* Results:
* The return value is either CK_SCROLL_MOVETO, CK_SCROLL_PAGES,
* CK_SCROLL_UNITS, or CK_SCROLL_ERROR. This indicates whether
* the command was successfully parsed and what form the command
* took. If CK_SCROLL_MOVETO, *dblPtr is filled in with the
* desired position; if CK_SCROLL_PAGES or CK_SCROLL_UNITS,
* *intPtr is filled in with the number of lines to move (may be
* negative); if CK_SCROLL_ERROR, interp->result contains an
* error message.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
Ck_GetScrollInfo(interp, argc, argv, dblPtr, intPtr)
Tcl_Interp *interp; /* Used for error reporting. */
int argc; /* # arguments for command. */
char **argv; /* Arguments for command. */
double *dblPtr; /* Filled in with argument "moveto"
* option, if any. */
int *intPtr; /* Filled in with number of pages
* or lines to scroll, if any. */
{
int c;
size_t length;
length = strlen(argv[2]);
c = argv[2][0];
if ((c == 'm') && (strncmp(argv[2], "moveto", length) == 0)) {
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " ", argv[1], " moveto fraction\"",
(char *) NULL);
return CK_SCROLL_ERROR;
}
if (Tcl_GetDouble(interp, argv[3], dblPtr) != TCL_OK) {
return CK_SCROLL_ERROR;
}
return CK_SCROLL_MOVETO;
} else if ((c == 's')
&& (strncmp(argv[2], "scroll", length) == 0)) {
if (argc != 5) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " ", argv[1], " scroll number units|pages\"",
(char *) NULL);
return CK_SCROLL_ERROR;
}
if (Tcl_GetInt(interp, argv[3], intPtr) != TCL_OK) {
return CK_SCROLL_ERROR;
}
length = strlen(argv[4]);
c = argv[4][0];
if ((c == 'p') && (strncmp(argv[4], "pages", length) == 0)) {
return CK_SCROLL_PAGES;
} else if ((c == 'u')
&& (strncmp(argv[4], "units", length) == 0)) {
return CK_SCROLL_UNITS;
} else {
Tcl_AppendResult(interp, "bad argument \"", argv[4],
"\": must be units or pages", (char *) NULL);
return CK_SCROLL_ERROR;
}
}
Tcl_AppendResult(interp, "unknown option \"", argv[2],
"\": must be moveto or scroll", (char *) NULL);
return CK_SCROLL_ERROR;
}
/*
*--------------------------------------------------------------
*
* Ck_SetEncoding --
*
*--------------------------------------------------------------
*/
int
Ck_SetEncoding(interp, name)
Tcl_Interp *interp;
char *name;
{
int i;
for (i = 0; i < sizeof (EncodingTable) / sizeof (EncodingTable[0]); i++)
if (strcmp(name, EncodingTable[i].name) == 0) {
Encoding = i;
return TCL_OK;
}
Tcl_AppendResult(interp, "no encoding \"", name, "\"", (char *) NULL);
return TCL_ERROR;
}
/*
*--------------------------------------------------------------
*
* Ck_GetEncoding --
*
*--------------------------------------------------------------
*/
int
Ck_GetEncoding(interp)
Tcl_Interp *interp;
{
Tcl_SetResult(interp, EncodingTable[Encoding].name, TCL_VOLATILE);
return TCL_OK;
}
#if CK_USE_UTF
/*
*--------------------------------------------------------------
*
* MakeUCRepl --
*
* Make replacement for unprintable chars.
*
*--------------------------------------------------------------
*/
static int
MakeUCRepl(uch, buf)
Tcl_UniChar uch;
char *buf;
{
unsigned int i, need;
if ((unsigned int) uch < sizeof (mapChars) &&
mapChars[(unsigned int) uch]) {
if (buf) {
*buf++ = '\\';
*buf++ = mapChars[(unsigned int) uch];
*buf++ = '\0';
}
return 2;
}
for (i = 0x100, need = 2; i; i++, need++) {
if ((unsigned int) uch < i) {
break;
}
i = i << 4;
}
if (buf) {
char *p;
*buf++ = '\\';
*buf++ = (need < 3) ? 'x' : 'u';
p = buf + need;
*p = '\0';
for (i = 0; i < need; i++) {
--p;
*p = hexChars[uch & 0xf];
uch = uch >> 4;
}
}
return need + 2;
}
#endif
/*
*--------------------------------------------------------------
*
* CkMeasureChars --
*
* Measure the number of characters from a string that
* will fit in a given horizontal span. The measurement
* is done under the assumption that CkDisplayChars will
* be used to actually display the characters.
*
* Results:
* The return value is the number of characters from source
* that fit in the span given by startX and maxX. *nextXPtr
* is filled in with the x-coordinate at which the first
* character that didn't fit would be drawn, if it were to
* be drawn.
*
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
int
CkMeasureChars(mainPtr, source, maxChars, startX, maxX,
tabOrigin, flags, nextXPtr, nextCPtr)
CkMainInfo *mainPtr; /* Needed for encoding. */
char *source; /* Characters to be displayed. Need not
* be NULL-terminated. */
int maxChars; /* Maximum # of characters to consider from
* source. */
int startX; /* X-position at which first character will
* be drawn. */
int maxX; /* Don't consider any character that would
* cross this x-position. */
int tabOrigin; /* X-location that serves as "origin" for
* tab stops. */
int flags; /* Various flag bits OR-ed together.
* CK_WHOLE_WORDS means stop on a word boundary
* (just before a space character) if
* possible. CK_AT_LEAST_ONE means always
* return a value of at least one, even
* if the character doesn't fit.
* CK_PARTIAL_OK means it's OK to display only
* a part of the last character in the line.
* CK_NEWLINES_NOT_SPECIAL means that newlines
* are treated just like other control chars:
* they don't terminate the line.
* CK_IGNORE_TABS means give all tabs zero
* width. */
int *nextXPtr; /* Return x-position of terminating
* character here. */
int *nextCPtr; /* Return byte position of terminating
character in source. */
{
register char *p; /* Current character. */
register int c;
char *term; /* Pointer to most recent character that
* may legally be a terminating character. */
int termX; /* X-position just after term. */
int curX; /* X-position corresponding to p. */
int newX; /* X-position corresponding to p+1. */
int rem;
int nChars = 0;
#if CK_USE_UTF
int n, m, srcRead, dstWrote, dstChars;
Tcl_UniChar uch;
char buf[TCL_UTF_MAX], buf2[TCL_UTF_MAX];
/*
* Scan the input string one character at a time, until a character
* is found that crosses maxX.
*/
newX = curX = startX;
termX = 0;
term = source;
for (p = source; *p != '\0' && maxChars > 0;) {
char *p2;
n = Tcl_UtfToUniChar(p, &uch);
p2 = p + n;
++nChars;
maxChars -= n;
m = Tcl_UniCharToUtf(uch, buf);
if (mainPtr->isoEncoding) {
buf2[0] = '\0';
Tcl_UtfToExternal(NULL, mainPtr->isoEncoding, buf, m,
TCL_ENCODING_START | TCL_ENCODING_END,
NULL, buf2, sizeof (buf2), &srcRead,
&dstWrote, &dstChars);
} else {
buf2[0] = '?';
if (uch > 0 && uch < 0x100) {
buf2[0] = uch;
}
}
c = buf2[0] & 0xFF;
if (CHARTYPE(c).type == TAB) {
if (!(flags & CK_IGNORE_TABS)) {
newX += 8;
rem = (newX - tabOrigin) % 8;
if (rem < 0) {
rem += 8;
}
newX -= rem;
}
} else if (CHARTYPE(c).type == GCHAR) {
newX += CHARTYPE(c).width;
} else if (CHARTYPE(c).type == NEWLINE) {
if (flags & CK_NEWLINES_NOT_SPECIAL) {
newX += CHARTYPE(c).width;
} else {
break;
}
} else if (mainPtr->isoEncoding) {
if (c == 0 || (c == '?' && uch != '?')) {
newX += MakeUCRepl(uch, 0);
} else {
if (CHARTYPE(c).type == REPLACE) {
newX += CHARTYPE(c).width;
} else {
newX++;
}
}
} else {
int len = wcwidth((wint_t) uch);
if (len < 0) {
newX += MakeUCRepl(uch, 0);
} else {
newX += len;
}
}
if (newX > maxX) {
break;
}
p = p2;
if (maxChars > 1) {
n = Tcl_UtfToUniChar(p, &uch);
p2 = p + n;
m = Tcl_UniCharToUtf(uch, buf);
if (mainPtr->isoEncoding) {
buf2[0] = '\0';
Tcl_UtfToExternal(NULL, mainPtr->isoEncoding, buf, m,
TCL_ENCODING_START | TCL_ENCODING_END,
NULL, buf2, sizeof (buf2), &srcRead,
&dstWrote, &dstChars);
} else {
buf2[0] = '?';
if (uch > 0 && uch < 0x100) {
buf2[0] = uch;
}
}
c = buf2[0] & 0xff;
} else {
c = 0;
}
if (isspace(c) || (c == 0)) {
term = p2;
termX = newX;
}
curX = newX;
}
/*
* P points to the first character that doesn't fit in the desired
* span. Use the flags to figure out what to return.
*/
if ((flags & CK_PARTIAL_OK) && (curX < maxX)) {
curX = newX;
if (*p) {
n = Tcl_UtfToUniChar(p, &uch);
p += n;
++nChars;
}
}
if ((flags & CK_AT_LEAST_ONE) && (term == source) && (maxChars > 0)
&& !isspace((unsigned char) *term)) {
term = p;
termX = curX;
if (term == source) {
n = Tcl_UtfToUniChar(term, &uch);
term += n;
++nChars;
}
} else if ((maxChars == 0) || !(flags & CK_WHOLE_WORDS)) {
term = p;
termX = curX;
}
*nextXPtr = termX;
*nextCPtr = term - source;
return nChars;
#else
/*
* Scan the input string one character at a time, until a character
* is found that crosses maxX.
*/
newX = curX = startX;
termX = 0;
term = source;
for (p = source, c = *p & 0xff; c != '\0' && maxChars > 0;
p++, maxChars--) {
++nChars;
if ((CHARTYPE(c).type == NORMAL) || (CHARTYPE(c).type == REPLACE) ||
(CHARTYPE(c).type == GCHAR)) {
newX += CHARTYPE(c).width;
} else if (CHARTYPE(c).type == TAB) {
if (!(flags & CK_IGNORE_TABS)) {
newX += 8;
rem = (newX - tabOrigin) % 8;
if (rem < 0) {
rem += 8;
}
newX -= rem;
}
} else if (CHARTYPE(c).type == NEWLINE) {
if (flags & CK_NEWLINES_NOT_SPECIAL) {
newX += CHARTYPE(c).width;
} else {
break;
}
}
if (newX > maxX) {
break;
}
if (maxChars > 1) {
c = p[1] & 0xff;
} else {
c = 0;
}
if (isspace(c) || (c == 0)) {
term = p+1;
termX = newX;
}
curX = newX;
}
/*
* P points to the first character that doesn't fit in the desired
* span. Use the flags to figure out what to return.
*/
if ((flags & CK_PARTIAL_OK) && (curX < maxX)) {
curX = newX;
p++;
++nChars;
}
if ((flags & CK_AT_LEAST_ONE) && (term == source) && (maxChars > 0)
&& !isspace((unsigned char) *term)) {
term = p;
termX = curX;
if (term == source && *source) {
term++;
termX = newX;
++nChars;
}
} else if ((maxChars == 0) || !(flags & CK_WHOLE_WORDS)) {
term = p;
termX = curX;
}
*nextXPtr = termX;
*nextCPtr = term - source;
return nChars;
#endif
}
/*
*--------------------------------------------------------------
*
* CkDisplayChars --
*
* Draw a string of characters on the screen, converting
* tabs to the right number of spaces and control characters
* to sequences of the form "\xhh" where hh are two hex
* digits.
*
* Results:
* None.
*
* Side effects:
* Information gets drawn on the screen.
*
*--------------------------------------------------------------
*/
void
CkDisplayChars(mainPtr, window, string, numChars, x, y, tabOrigin, flags)
CkMainInfo *mainPtr; /* Needed for encoding. */
WINDOW *window; /* Curses window. */
char *string; /* Characters to be displayed. */
int numChars; /* Number of characters to display from
* string. */
int x, y; /* Coordinates at which to draw string. */
int tabOrigin; /* X-location that serves as "origin" for
* tab stops. */
int flags; /* Flags to control display. Only
* CK_NEWLINES_NOT_SPECIAL, CK_IGNORE_TABS
* and CK_FILL_UNTIL_EOL are supported right
* now. See CkMeasureChars for information
* about it. */
{
register char *p; /* Current character being scanned. */
register int c;
int startX; /* X-coordinate corresponding to start. */
int curX; /* X-coordinate corresponding to p. */
char replace[16];
int rem, dummy, maxX, nc = 0;
/*
* Scan the string one character at a time and display the
* character.
*/
getmaxyx(window, dummy, maxX);
#if CK_USE_UTF
nc = Tcl_NumUtfChars(string, numChars);
if (nc > maxX)
numChars = Tcl_UtfAtIndex(string, maxX) - string;
else
numChars = nc;
#endif
if (numChars > maxX)
numChars = maxX;
p = string;
if (x < 0) {
x = -x;
#if CK_USE_UTF
x = Tcl_UtfAtIndex(p, x) - p;
#endif
p += x;
numChars -= x;
x = 0;
}
wmove(window, y, x);
startX = curX = x;
for (; numChars > 0; numChars--, p += nc) {
#if CK_USE_UTF
Tcl_UniChar uch;
int len;
if (*p == '\0')
break;
nc = Tcl_UtfToUniChar(p, &uch);
if (mainPtr->isoEncoding) {
int srcRead, dstWrote, dstChars;
char buf[TCL_UTF_MAX];
buf[0] = '\0';
Tcl_UtfToExternal(NULL, mainPtr->isoEncoding, p, nc,
TCL_ENCODING_START | TCL_ENCODING_END,
NULL, buf, sizeof (buf), &srcRead,
&dstWrote, &dstChars);
c = buf[0] & 0xff;
if (dstWrote != 1 || (c == '?' && uch != '?')) {
c = '\0';
}
} else {
c = uch & 0xff;
}
if ((unsigned int) uch < 0x100 && CHARTYPE(c).type == TAB) {
if (!(flags & CK_IGNORE_TABS)) {
curX += 8;
rem = (curX - tabOrigin) % 8;
if (rem < 0) {
rem += 8;
}
curX -= rem;
}
while (startX < curX) {
waddch(window, ' ');
startX++;
}
continue;
} else if ((unsigned int) uch < 0x100 && CHARTYPE(c).type == GCHAR) {
long gchar;
if (Ck_GetGChar(NULL, gcharTab[c - 0x81], &gchar) != TCL_OK)
goto replaceChar;
waddch(window, gchar);
curX++;
} else if ((unsigned int) uch < 0x100 &&
CHARTYPE(c).type == NEWLINE &&
!(flags & CK_NEWLINES_NOT_SPECIAL)) {
y++;
wmove(window, y, x);
curX = x;
} else if (mainPtr->isoEncoding) {
if ((unsigned int) uch < 0x20 ||
CHARTYPE(c).type == REPLACE) {
replaceChar:
len = MakeUCRepl(uch, replace);
if (len + curX > maxX) {
len = maxX - curX;
if (len < 0)
len = 0;
}
waddnstr(window, replace, len);
} else {
len = 1;
waddch(window, c);
}
curX += len;
} else {
len = wcwidth((wint_t) uch);
if (len < 0 || (unsigned int) uch < 0x20) {
len = MakeUCRepl(uch, replace);
if (len + curX > maxX) {
len = maxX - curX;
if (len < 0)
len = 0;
}
waddnstr(window, replace, len);
} else {
#ifdef USE_NCURSESW
wchar_t w[2];
w[0] = uch;
w[1] = 0;
waddnwstr(window, w, 1);
#else
waddnstr(window, p, nc);
#endif
}
curX += len;
}
#else
nc = 1;
c = *p & 0xff;
if (c == '\0')
break;
if (CHARTYPE(c).type == NORMAL) {
waddch(window, c);
curX++;
}
if (CHARTYPE(c).type == TAB) {
if (!(flags & CK_IGNORE_TABS)) {
curX += 8;
rem = (curX - tabOrigin) % 8;
if (rem < 0) {
rem += 8;
}
curX -= rem;
}
while (startX < curX) {
waddch(window, ' ');
startX++;
}
continue;
} else if (CHARTYPE(c).type == GCHAR) {
long gchar;
if (Ck_GetGChar(NULL, gcharTab[c - 0x81], &gchar) != TCL_OK)
goto replaceChar;
waddch(window, gchar);
startX++;
curX = startX;
continue;
} else if (CHARTYPE(c).type == REPLACE || (CHARTYPE(c).type == NEWLINE
&& (flags & CK_NEWLINES_NOT_SPECIAL))) {
replaceChar: