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implement Mc;
include "sys.m";
sys: Sys;
open, read, fprint, fildes, tokenize,
ORDWR, OREAD, OWRITE: import sys;
include "draw.m";
draw: Draw;
Font: import draw;
include "bufio.m";
bufio: Bufio;
Iobuf: import bufio;
include "arg.m";
font: ref Font;
columns := 65;
tabwid := 0;
mintab := 1;
Mc: module{
init: fn(nil: ref Draw->Context, argv: list of string);
};
init(ctxt: ref Draw->Context, argv: list of string)
{
sys = load Sys Sys->PATH;
if((bufio = load Bufio Bufio->PATH) == nil)
fatal("can't load " + Bufio->PATH);
draw = load Draw Draw->PATH;
if((arg := load Arg Arg->PATH) == nil)
fatal("can't load " + Arg->PATH);
getwidth(ctxt);
arg->init(argv);
arg->setusage("mc [-c columns] [file ...]");
while((c:=arg->opt()) != 0)
case c {
'c' => columns = int arg->earg() * mintab;
* => arg->usage();
}
argv = arg->argv();
if(len argv == 0)
argv = "/fd/0" :: nil;
a := array[1024] of (string, int);
n := 0;
maxwidth := 0;
for(; argv!=nil; argv=tl argv){
if((bin:=bufio->open(hd argv, OREAD)) == nil){
fprint(fildes(2), "mc: can't open %s: %r\n", hd argv);
continue;
}
while((s:=bin.gets('\n')) != nil){
if(s[len s-1] == '\n')
s = s[0:len s-1];
if(n == len a)
a = (array[n+1024] of (string, int))[0:] = a;
a[n].t0 = s;
a[n].t1 = wordsize(s);
if(a[n].t1 > maxwidth)
maxwidth = a[n].t1;
n++;
}
bin.close();
}
outcols(a[:n], maxwidth);
}
outcols(words: array of (string, int), maxwidth: int)
{
maxwidth = nexttab(maxwidth+mintab-1);
numcols := columns / maxwidth;
if(numcols <= 0)
numcols = 1;
nwords := len words;
nlines := (nwords+numcols-1) / numcols;
bout := bufio->fopen(fildes(1), OWRITE);
for(i := 0; i < nlines; i++){
col := endcol := 0;
for(j:=i; j<nwords; j+=nlines){
endcol += maxwidth;
bout.puts(words[j].t0);
col += words[j].t1;
if(j+nlines < nwords){
while(col < endcol){
if(tabwid)
bout.putc('\t');
else
bout.putc(' ');
col = nexttab(col);
}
}
}
bout.putc('\n');
}
bout.close();
}
wordsize(s: string): int
{
if(font != nil)
return font.width(s);
return len s;
}
nexttab(col: int): int
{
if(tabwid){
col += tabwid;
col -= col%tabwid;
return col;
}
return col+1;
}
getwidth(ctxt: ref Draw->Context)
{
if(ctxt == nil || draw == nil)
return;
if((wid := rf("/env/acmewin")) == nil)
return;
if((fd := open("/chan/" + wid + "/ctl", ORDWR)) == nil)
return;
buf := array[256] of byte;
if((n := read(fd, buf, len buf)) <= 0)
return;
(nf, f) := tokenize(string buf[:n], " ");
if(nf != 8)
return;
f0 := tl tl tl tl tl f;
if((font = Font.open(ctxt.display, hd tl f0)) == nil)
return;
tabwid = int hd tl tl f0;
mintab = font.width("0");
columns = int hd f0;
}
fatal(s: string)
{
fprint(fildes(2), "mc: %s: %r\n", s);
raise "fail:"+s;
}
rf(f: string): string
{
fd := sys->open(f, Sys->OREAD);
if(fd == nil)
return nil;
b := array[Sys->NAMEMAX] of byte;
n := sys->read(fd, b, len b);
if(n < 0)
return nil;
return string b[0:n];
}
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