shithub: gj

Download patch

ref: d26dc323c121e512b3c9b71c6c6bb98ffa27348a
author: phil9 <telephil9@gmail.com>
date: Wed Sep 29 03:17:06 EDT 2021 

initial import


--- /dev/null
+++ b/gj.c
@@ -1,0 +1,97 @@
+#include <u.h>
+#include <libc.h>
+#include <json.h>
+
+char*
+readfile(int fd)
+{
+	char *b;
+	int s, r, n;
+
+	n = 0;
+	s = 4096;
+	b = malloc(s);
+	if(b==nil)
+		sysfatal("malloc: %r");
+	for(;;){
+		r = read(fd, b+n, s-n);
+		if(r<0)
+			sysfatal("read: %r");
+		if(r==0)
+			break;
+		n += r;
+		if(n==s){
+			s *= 1.5;
+			b = realloc(b, s);
+			if(b==nil)
+				sysfatal("realloc: %r");
+		}
+	}
+	b[n] = 0;
+	return b;			
+}
+
+void
+walk(char *path, JSON *json)
+{
+	int i;
+	char *s;
+	JSONEl *e;
+
+	print("%s = ", path);
+	switch(json->t){
+	case JSONNull:
+		print("null;\n");
+		break;
+	case JSONBool:
+		print("%s;\n", json->n ? "true": "false");
+		break;
+	case JSONNumber:
+		print("%f;\n", json->n);
+		break;
+	case JSONString:
+		print("\"%s\";\n", json->s);
+		break;
+	case JSONArray:
+		print("[];\n");
+		for(i=0, e=json->first; e!=nil; i++, e=e->next){
+			s = smprint("%s[%d]", path, i);
+			walk(s, e->val);
+			free(s);
+		}
+		break;
+	case JSONObject:
+		print("{};\n");
+		for(e=json->first; e!=nil; e=e->next){
+			s = smprint("%s.%s", path, e->name);
+			walk(s, e->val);
+			free(s);
+		}
+		break;
+	}
+}
+
+void
+main(int argc, char *argv[])
+{
+	int fd;
+	char *s;
+	JSON *json;
+
+	fd = 0;
+	ARGBEGIN{
+	}ARGEND;
+	if(argc==1){
+		fd = open(*argv, OREAD);
+		if(fd<=0)
+			sysfatal("open: %r");
+	}
+	s = readfile(fd);
+	close(fd);
+	json = jsonparse(s);
+	if(json==nil)
+		sysfatal("jsonparse: %r");
+	walk("json", json);
+	jsonfree(json);
+	exits(nil);
+}
--- /dev/null
+++ b/mkfile
@@ -1,0 +1,8 @@
+</$objtype/mkfile
+
+BIN=/$objtype/bin
+CFLAGS=-FTVw
+TARG=gj
+OFILES=gj.$O
+
+</sys/src/cmd/mkone