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nroff.1 uses driving tables to customize its output for various types of output devices, such as terminals, line printers, daisy-wheel printers, or special output filter programs. These driving tables are written as C programs, compiled, and installed in the directory /usr/lib/term. The name of the output device is specified with the -T option of nroff. The structure of the terminal table is as follows:
#define INCH 240
struct {
int bset;
int breset;
int Hor;
int Vert;
int Newline;
int Char;
int Em;
int Halfline;
int Adj;
char *twinit;
char *twrest;
char *twnl;
char *hlr;
char *hlf;
char *flr;
char *bdon;
char *bdoff;
char *ploton;
char *plotoff;
char *up;
char *down;
char *right;
char *left;
char *codetab[256-32];
char *zzz;
} t;
The meanings of the various fields are as follows:
Note: if this is less than the size of the SPACE character (in units of Char; see below for how the sizes of characters are defined), nroff will output fractional SPACE characters using plot mode. Also, if the -e switch to nroff is used, Adj is set equal to Hor by nroff.
All quantities which are in units of fractions of an inch should be expressed as `INCH*num/denom', where num and denom are respectively the numerator and denominator of the fraction; that is, 1/48 of an inch would be written as `INCH/48'.
If any sequence of characters does not pertain to the output device, that sequence should be given as a null string.
The following is a sample codetab encoding.
<!-- by Bill Tuthill, 15dec82 -->
"\001 ", /*space*/
"\001!", /*!*/
"\001\"", /*"*/
"\001#", /*#*/
"\001$", /*$*/
"\001%", /*%*/
"\001&", /*&*/
"\001'", /*'*/
"\001(", /*(*/
"\001)", /*)*/
"\001*", /***/
"\001+", /*+*/
"\001,", /*,*/
"\001-", /*-*/
"\001.", /*.*/
"\001/", /*/*/
"\2010", /*0*/
"\2011", /*1*/
"\2012", /*2*/
"\2013", /*3*/
"\2014", /*4*/
"\2015", /*5*/
"\2016", /*6*/
"\2017", /*7*/
"\2018", /*8*/
"\2019", /*9*/
"\001:", /*:*/
"\001;", /*;*/
"\001<", /*<*/
"\001=", /*=*/
"\001>", /*>*/
"\001?", /*?*/
"\001@", /*@*/
"\201A", /*A*/
"\201B", /*B*/
"\201C", /*C*/
"\201D", /*D*/
"\201E", /*E*/
"\201F", /*F*/
"\201G", /*G*/
"\201H", /*H*/
"\201I", /*I*/
"\201J", /*J*/
"\201K", /*K*/
"\201L", /*L*/
"\201M", /*M*/
"\201N", /*N*/
"\201O", /*O*/
"\201P", /*P*/
"\201Q", /*Q*/
"\201R", /*R*/
"\201S", /*S*/
"\201T", /*T*/
"\201U", /*U*/
"\201V", /*V*/
"\201W", /*W*/
"\201X", /*X*/
"\201Y", /*Y*/
"\201Z", /*Z*/
"\001[", /*[*/
"\001\\", /*\*/
"\001]", /*]*/
"\001^", /*^*/
"\001_", /*_*/
"\001`", /*`*/
"\201a", /*a*/
"\201b", /*b*/
"\201c", /*c*/
"\201d", /*d*/
"\201e", /*e*/
"\201f", /*f*/
"\201g", /*g*/
"\201h", /*h*/
"\201i", /*i*/
"\201j", /*j*/
"\201k", /*k*/
"\201l", /*l*/
"\201m", /*m*/
"\201n", /*n*/
"\201o", /*o*/
"\201p", /*p*/
"\201q", /*q*/
"\201r", /*r*/
"\201s", /*s*/
"\201t", /*t*/
"\201u", /*u*/
"\201v", /*v*/
"\201w", /*w*/
"\201x", /*x*/
"\201y", /*y*/
"\201z", /*z*/
"\001{", /*{*/
"\001|", /*|*/
"\001}", /*}*/
"\001~", /*~*/
"\000\0", /*narrow sp*/
"\001-", /*hyphen*/
"\001\016Z\017", /*bullet*/
"\002[]", /*square*/
"\002--", /*3/4 em dash*/
"\001_", /*rule*/
"\0031/4", /*1/4*/
"\0031/2", /*1/2*/
"\0033/4", /*3/4*/
"\001-", /*minus*/
"\202fi", /*fi*/
"\202fl", /*fl*/
"\202ff", /*ff*/
"\203ffi", /*ffi*/
"\203ffl", /*ffl*/
"\001\016p\017", /*degree*/
"\001|\b\342-\302", /*dagger*/
"\001\301s\343s\302", /*section*/
"\001'", /*foot mark*/
"\001\033Z", /*acute accent*/
"\001`", /*grave accent*/
"\001_", /*underrule*/
"\001/", /*long slash*/
"\000\0", /*half narrow space*/
"\001 ", /*unpaddable space*/
"\001\016A\017", /*alpha*/
"\001\016B\017", /*beta*/
"\001\016C\017", /*gamma*/
"\001\016D\017", /*delta*/
"\001\016E\017", /*epsilon*/
"\001\016F\017", /*zeta*/
"\001\016G\017", /*eta*/
"\001\016H\017", /*theta*/
"\001\016I\017", /*iota*/
"\001\016J\017", /*kappa*/
"\001\016K\017", /*lambda*/
"\001\016L\017", /*mu*/
"\001\016M\017", /*nu*/
"\001\016N\017", /*xi*/
"\001\016O\017", /*omicron*/
"\001\016P\017", /*pi*/
"\001\016Q\017", /*rho*/
"\001\016R\017", /*sigma*/
"\001\016S\017", /*tau*/
"\001\016T\017", /*upsilon*/
"\001\016U\017", /*phi*/
"\001\016V\017", /*chi*/
"\001\016W\017", /*psi*/
"\001\016X\017", /*omega*/
"\001\016#\017", /*Gamma*/
"\001\016$\017", /*Delta*/
"\001\016(\017", /*Theta*/
"\001\016+\017", /*Lambda*/
"\001\016.\017", /*Xi*/
"\001\0160\017", /*Pi*/
"\001\0169\017", /*Sigma*/
"\000", /**/
"\001\0164\017", /*Upsilon*/
"\001\0165\017", /*Phi*/
"\001\0167\017", /*Psi*/
"\001\0168\017", /*Omega*/
"\001\016[\017", /*square root*/
"\001\016Y\017", /*\(ts yields script-l*/
"\001\016k\017", /*root en*/
"\001>\b_", /*>=*/
"\001<\b_", /*<=*/
"\001=\b_", /*identically equal*/
"\001-", /*equation minus*/
"\001\016o\017", /*approx =*/
"\001\016n\017", /*approximates*/
"\001=\b/", /*not equal*/
"\002-\242-\202>", /*right arrow*/
"\002<\b\202-\242\200-", /*left arrow*/
"\001|\b^", /*up arrow*/
"\001|\b\302v\342", /*down arrow*/
"\001=", /*equation equal*/
"\001\016|\017", /*multiply*/
"\001\016}\017", /*divide*/
"\001\016j\017", /*plus-minus*/
"\001\243|\203_\203|\243", /*cup (union)*/
"\001\243|\203\351_\311\203|\243", /*cap (intersection)*/
"\001\243(\203\302-\345-\303", /*subset of*/
"\001\302-\345-\303\203)\243", /*superset of*/
"\001_\b\243(\203\302-\345-\303", /*improper subset*/
"\001_\b\302-\345-\303\203)\243", /*improper superset*/
"\001\016~\017", /*infinity*/
"\001\200o\201\301`\241\341`\241\341`\201\301", /*partial derivative*/
"\001\016:\017", /*gradient*/
"\001\200-\202\341,\301\242", /*not*/
"\001\016?\017", /*integral sign*/
"\002o\242c\202", /*proportional to*/
"\001O\b/", /*empty set*/
"\001<\b\341-\302", /*member of*/
"\001+", /*equation plus*/
"\003(R)", /*registered*/
"\003(C)", /*copyright*/
"\001|", /*box rule */
"\001\033Y", /*cent sign*/
"\001|\b\342=\302", /*double dagger*/
"\002=>", /*right hand*/
"\002<=", /*left hand*/
"\001*", /*math * */
"\001\0162\017", /*\(bs yields small sigma*/
"\001|", /*or (was star)*/
"\001O", /*circle*/
"\001|", /*left top of big brace*/
"\001|", /*left bot of big brace*/
"\001|", /*right top of big brace*/
"\001|", /*right bot of big brace*/
"\001\016]\017", /*left center of big brace*/
"\001\016\\\017", /*right center of big brace*/
"\001|", /*bold vertical*/
"\001|", /*left floor (lb of big bracket)*/
"\001|", /*right floor (rb of big bracket)*/
"\001|", /*left ceiling (lt of big bracket)*/
"\001|" /*right ceiling (rt of big bracket)*/
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Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97