diff options
Diffstat (limited to 'doc/context/sources/general/manuals/luametatex/luametatex-libraries.tex')
| -rw-r--r-- | doc/context/sources/general/manuals/luametatex/luametatex-libraries.tex | 55 |
1 files changed, 47 insertions, 8 deletions
diff --git a/doc/context/sources/general/manuals/luametatex/luametatex-libraries.tex b/doc/context/sources/general/manuals/luametatex/luametatex-libraries.tex index d8210ac48..407544700 100644 --- a/doc/context/sources/general/manuals/luametatex/luametatex-libraries.tex +++ b/doc/context/sources/general/manuals/luametatex/luametatex-libraries.tex @@ -9,7 +9,7 @@ \startsection[title=Introduction] The libraries can be grouped in categories like fonts, languages, \TEX, -\METAPOST, \PDF, etc. There are however also some that are more general puspose +\METAPOST, \PDF, etc. There are however also some that are more general purpose and these are discussed here. \stopsection @@ -33,9 +33,9 @@ work on normal \LUA\ file handles. \NC readinteger3 \NC (f) \NC a 3 byte signed integer \NC \NR \NC readinteger4 \NC (f) \NC a 4 byte signed integer \NC \NR \NC readintegertable \NC (f,n,b) \NC \type {n} integers of \type {b} bytes \NC \NR -\NC readfixed2 \NC (f) \NC a 2 byte float (used in font files) \NC \NR -\NC readfixed4 \NC (f) \NC a 4 byte float (used in font files) \NC \NR -\NC read2dot14 \NC (f) \NC a 2 byte float (used in font files) \NC \NR +\NC readfixed2 \NC (f) \NC a float made from a 2 byte fixed format \NC \NR +\NC readfixed4 \NC (f) \NC a float made from a 4 byte fixed format \NC \NR +\NC read2dot14 \NC (f) \NC a float made from a 2 byte in 2dot4 format \NC \NR \NC setposition \NC (f,p) \NC goto position \type {p} \NC \NR \NC getposition \NC (f) \NC get the current position \NC \NR \NC skipposition \NC (f,n) \NC skip \type {n} positions \NC \NR @@ -45,7 +45,8 @@ work on normal \LUA\ file handles. \stoptabulate When relevant there are also variants that end with \type {le} that do it the -little endian way. +little endian way. The fixed and dot floating points formats are found in font +files and return \LUA\ doubles. A similar set of function as in the \type {fio} library is available in the \type {sio} library: \libidx {sio} {readcardinal1}, \libidx {sio} {readcardinal2}, @@ -268,6 +269,44 @@ These are accompanied by \type {libcerf} functions: \stopsection +\startsection[title=\type{xdecimal}] + +As an experiment \LUAMETATEX\ provides an interface to the \type {decNumber} +library that we have on board for \METAPOST\ anyway. Apart from the usual +support for operators there are some functions. + +\starttabulate[|Tw(12em)|T|T|] +\DB name \BC arguments \BC results \NC \NR +\TB +\NC abs \NC (a) \NC \NC \NR +\NC new \NC ([n or s]) \NC \NC \NR +\NC copy \NC (a) \NC \NC \NR +\NC trim \NC (a) \NC \NC \NR +\NC tostring \NC (a) \NC \NC \NR +\NC tonumber \NC (a) \NC \NC \NR +\NC setprecision \NC (n) \NC \NC \NR +\NC getprecision \NC () \NC \NC \NR +\NC conj \NC (a) \NC \NC \NR +\NC abs \NC (a) \NC \NC \NR +\NC pow \NC (a,b) \NC \NC \NR +\NC sqrt \NC (a) \NC \NC \NR +\NC ln \NC (a) \NC \NC \NR +\NC log \NC (a) \NC \NC \NR +\NC exp \NC (a) \NC \NC \NR +\NC bor \NC (a,b) \NC \NC \NR +\NC bxor \NC (a,b) \NC \NC \NR +\NC band \NC (a,b) \NC \NC \NR +\NC shift \NC (a,b) \NC \NC \NR +\NC rotate \NC (a,b) \NC \NC \NR +\NC minus \NC (a) \NC \NC \NR +\NC plus \NC (a) \NC \NC \NR +\NC min \NC (a,b) \NC \NC \NR +\NC max \NC (a,b) \NC \NC \NR +\LL +\stoptabulate + +\stopsection + \startsection[title=\type{lfs}] The original \type {lfs} module has been adapted a bit to our needs but for @@ -385,7 +424,7 @@ piecemeal: \libidx {string} {utfvalues}, \libidx {string} {utfcharacters}, \type {string.utfcharacters(s)}: a string with a single \UTF-8 token in it \stopitem \startitem - \type {string.cWharacters(s)}: a string containing one byte + \type {string.characters(s)}: a string containing one byte \stopitem \startitem \type {string.characterpairs(s)}: two strings each containing one byte or an @@ -483,7 +522,7 @@ the \type {lua} namespace. \startitem \type {os.gettimeofday} returns the current \quote {\UNIX\ time}, but as a float. Keep in mind that there might be platforms where this function is - available. + not available. \stopitem \startitem @@ -524,7 +563,7 @@ the \type {lua} namespace. \startsection[title={The \type {lua} library functions}] -The \type {lua} library provide some general helpers. +The \type {lua} library provides some general helpers. \startitemize |