mkxml

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

#!/bin/rc

echo \
'#include "stdinc.h"
#include "dat.h"
#include "fns.h"
#include "httpd.h"
#include "xml.h"
'

sed -n '/<struct/,/<\/struct>/{
	s/^[^<]+</</
	t cleart
:cleart
	s/<struct name="(.*)" type="(.*)">.*/void xml\1(Hio *hout, \2s, char *tag, int indent){\n	xmlIndent(hout, indent);\n	hprint(hout, "<%s", tag);\n	hprint(hout, ">\\n");/
	t start
	s/<field name="(.*)" val="(.*)" type="(.*)"\/>.*/	xml\3(hout, \2, "\1");\n	hprint(hout, ">\\n");/
	t field
	s/<array name="(.*)" val="(.*)" elems="(.*)" type="(.*)"\/>.*/	xmlIndent(hout, indent + 1);\n	hprint(hout, "<\1s>\\n");\n	for(i = 0; i < \3; i++)\n		xml\4(hout, \2, "\1", indent + 2);\n	xmlIndent(hout, indent + 1);\n	hprint(hout, "<\/\1s>\\n");/
	t array
	s/<\/struct>/	xmlIndent(hout, indent);\n	hprint(hout, "<\/%s>\\n", tag);\n}\n/
	t produce
}
b
:start
	h
	b
:field
	x
	s/	hprint\(hout, ">\\n"\);//g
	x
	H
	b
:array
	H
	x
	s/{\n/&	int i;\n\n/
	s/^	int i;\n\n	int i;\n/	int i;\n/
	x
	b
:produce
	H
	g
	s/\n\n/\n/g
	s/	hprint.hout, ">\\n".;\n	xmlIndent.hout, indent.;\n	hprint.*/	hprint(hout, "\/>\\n");/
	p
' $1