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/* lpescape.c */
/* Copyright 1995 by Steve Kirkendall */
char id_lpescape[] = "$Id: lpescape.c,v 2.14 1997/10/05 19:06:12 steve Exp $";
/* This file contains a driver for printer types which use escape sequences
* to select fonts. This includes the "epson", "hp", and "dumb" printer types.
*/
#include "elvis.h"
#ifdef FEATURE_LPR
/* These values are used to index into the following table of escape codes */
typedef enum {BOLD, NOBOLD, UNDLN, NOUNDLN, ITALIC, NOITALIC, BEFORE, AFTER, GCMAP} CODE;
#if USE_PROTOTYPES
static void endfont(void);
static void before(int minorno, void (*draw)(_CHAR_));
static void fontch(_char_ font, _CHAR_ ch);
static void page(int linesleft);
static void after(int linesleft);
#endif
/* This table lists the escape codes used by each printer type */
static char *codes[][9] =
{ /* BOLD NOBOLD UNDLN NOUNDLN ITALIC NOITALIC BEFORE AFTER GCMAP */
/*epson*/{"E", "F", "-1", "-0", "4", "5", NULL, NULL, "+++++++++-|*"},
/*pana*/ {"E", "F", "-1", "-0", "4", "5", "\033t1", "\033t0", "\300\301\331\303\305\264\332\302\277\304\263\371"},
/*ibm*/ {"E", "F", "-1", "-0", "4", "5", NULL, NULL, "\300\301\331\303\305\264\332\302\277\304\263\371"},
/*hp*/ {"(s3B","(s0B","&d1D", "&d@", "(s1S", "(s0S", "\033(10U", NULL, "\300\301\331\303\305\264\332\302\277\304\263\371"},
/*dumb*/ {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "+++++++++-|*"}
};
/* This table is used for converting Latin-1 characters to PC-8 characters.
* This is necessary because the printer is placed in PC-8 mode so that it can
* output the graphic characters used by the <pre graphic> tag, and most
* computers these days use Latin-1 internally. This table only maps the
* Latin-1 characters within the range 0xa0-0xff; others don't need conversion.
* Some conversions are not exact.
*/
static unsigned char topc8[] =
{
' ', 0xad, 0x9b, 0x9c, '*', 0x9d, '|', 0xf5, '"', 0xe9, 0xa6, 0xae, 0xaa, '-', 'R', '~',
0xf8, 0xf1, 0xfd, '3', '\'', 0xe6, 0xf4, 0xf9, ',', '1', 0xa7, 0xaf, 0xac, 0xab, '3', 0xa8,
'A', 'A', 'A', 'A', 0x8e, 0x8f, 0x92, 0x80, 'E', 0x90, 'E', 'E', 'I', 'I', 'I', 'I',
'D', 0xa5, 'O', 'O', 'O', 'O', 0x99, 'x', 'O', 'U', 'U', 'U', 0x9a, 'Y', 0xe8, 0xe1,
0x85, 0xa0, 0x83, 'a', 0x84, 0x86, 0x91, 0x87, 0x8a, 0x82, 0x88, 0x89, 0x8d, 0xa1, 0x8c, 0x8b,
0xeb, 0xa4, 0x95, 0xa2, 0x93, 'o', 0x94, 0xf6, 'o', 0x97, 0xa3, 0x97, 0x81, 'y', 0xe7, 'y'
};
static unsigned char *convert;
/* This value is the minor number of the driver being used. It is set by the
* before() function, and remains valid until the after() function returns.
*/
static int ptype;
/* This is a pointer to the draw() function to use for outputing individual
* characters. It is set by the before() function, and remains valid until
* the after() function returns.
*/
static void (*prtchar) P_((_CHAR_ ch));
/* This stores the font currently set for output */
static char curfont = 'n';
/* This function switches off a non-normal font */
static void endfont()
{
char *scan;
switch (curfont)
{
case 'e':
case 'b': scan = codes[ptype][NOBOLD]; break;
case 'u': scan = codes[ptype][NOUNDLN]; break;
case 'i': scan = codes[ptype][NOITALIC]; break;
default: scan = NULL;
}
if (scan)
{
(*prtchar)('\033');
while (*scan)
{
(*prtchar)((_CHAR_)*scan);
scan++;
}
}
}
/* This is the before() function. It sets the ptype index, outputs the
* BEFORE string if it isn't NULL, and sets the convert variable.
*/
static void before(minorno, draw)
int minorno; /* which control codes to use */
void (*draw) P_((_CHAR_)); /* function for printing a single character */
{
char *scan;
assert(minorno < QTY(codes));
/* set the ptype and out function */
ptype = minorno;
prtchar = draw;
curfont = '\n';
/* if there is a BEFORE string, output it now */
for (scan = codes[ptype][BEFORE]; scan && *scan; scan++)
{
(*prtchar)((_CHAR_)*scan);
}
/* if the file appears to use Latin-1, and the lpconvert option is set,
* then set the convert pointer to point to the topc8[] array; else
* set the convert pointer to NULL.
*/
if (o_lpconvert && digraph('A', 'E') == 0xc6)
{
convert = topc8;
}
else
{
convert = NULL;
}
}
/* This function outputs font-change strings, if necessary, and then outputs
* a character.
*/
static void fontch(font, ch)
_char_ font; /* font of the next character from text image */
_CHAR_ ch; /* the next character */
{
char *scan;
/* is the font changing? */
if (font != curfont)
{
/* switch off a non-normal font, if we're in one */
endfont();
/* switch on a non-normal font, if we should be in one */
switch (font)
{
case 'e':
case 'b': scan = codes[ptype][BOLD]; break;
case 'u': scan = codes[ptype][UNDLN]; break;
case 'i': scan = codes[ptype][ITALIC]; break;
default: scan = NULL;
}
if (scan)
{
(*prtchar)('\033');
while (*scan)
{
(*prtchar)((_CHAR_)*scan);
scan++;
}
}
/* remember what font we just switched to. */
curfont = font;
}
/* if in graphic mode, convert graphic characters */
if (font == 'g' && codes[ptype][GCMAP])
{
switch (ch)
{
case '1': ch = codes[ptype][GCMAP][0]; break;
case '2': ch = codes[ptype][GCMAP][1]; break;
case '3': ch = codes[ptype][GCMAP][2]; break;
case '4': ch = codes[ptype][GCMAP][3]; break;
case '5': ch = codes[ptype][GCMAP][4]; break;
case '6': ch = codes[ptype][GCMAP][5]; break;
case '7': ch = codes[ptype][GCMAP][6]; break;
case '8': ch = codes[ptype][GCMAP][7]; break;
case '9': ch = codes[ptype][GCMAP][8]; break;
case '-': ch = codes[ptype][GCMAP][9]; break;
case '|': ch = codes[ptype][GCMAP][10]; break;
case '*': ch = codes[ptype][GCMAP][11]; break;
}
}
else if (convert && ch >= 0xa0)
{
ch = convert[ch - 0xa0];
}
/* output the character */
(*prtchar)(ch);
}
/* This function is called after every page except the last one */
static void page(linesleft)
int linesleft; /* number of lines remaining on page */
{
/* output a formfeed character */
(*prtchar)('\f');
}
/* This function is called at the end of the print job. It can output a
* final formfeed, restore fonts, or whatever. Here, it just outputs the
* AFTER string, if there is one.
*/
static void after(linesleft)
int linesleft; /* number of lines remaining on final page */
{
char *scan;
/* if there is an AFTER string, output it now */
for (scan = codes[ptype][AFTER]; scan && *scan; scan++)
{
(*prtchar)((_CHAR_)*scan);
}
/* and maybe output a formfeed, too */
if (o_lpformfeed)
{
(*prtchar)((_CHAR_)'\f');
}
}
/* These describe the printer types supported by these functions */
LPTYPE lpepson ={"epson", 0, True, before, fontch, page, after};
LPTYPE lppana = {"pana", 1, True, before, fontch, page, after};
LPTYPE lpibm = {"ibm", 2, True, before, fontch, page, after};
LPTYPE lphp = {"hp", 3, True, before, fontch, page, after};
LPTYPE lpdumb = {"dumb", 4, True, before, fontch, page, after};
#endif /* FEATURE_LPR */
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