plan9port

commit e4352a504acf83163fe41a3c1a557fbb3fb17878
parent cedc8995374227141a55c363a442f93a8486f8c8
Author: ssnf <ssnf@ssnf.xyz>
Date:   Wed, 27 Aug 2025 14:59:02 +0000

json2sdb

Diffstat:
M
.gitignore
 | 
1
+
A
src/cmd/sdb/json2sdb.c
 | 
94
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
M
src/cmd/sdb/mkfile
 | 
1
+

3 files changed, 96 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -111,6 +111,7 @@ bin/img
 bin/import
 bin/join
 bin/jpg
+bin/json2sdb
 bin/lex
 bin/listen1
 bin/look
diff --git a/src/cmd/sdb/json2sdb.c b/src/cmd/sdb/json2sdb.c
@@ -0,0 +1,94 @@
+#include <u.h>
+#include <libc.h>
+
+#include <bio.h>
+#include <str.h>
+#include <vec.h>
+#include <sdbr.h>
+#include <json.h>
+
+static String node;
+static String tmp;
+
+static void
+JObj2r(Json *j)
+{
+	JsonObj *o;
+	ulong i;
+	char t, last;
+
+	if (j->cur->t == JErr)
+		sysfatal("%s at line %d", j->cur->k.s, (int)j->cur->v.n);
+	Strzero(&node);
+	last = 0;
+	for (i = 0; i < j->n; ++i) {
+		o = j->o + j->st[i];
+		t = o->v.c;
+		if (t == '{' || t != last)
+			Strprint(&node, "%U", o->k.s);
+		if (j->cur->t == JObj && i == j->n - 1) {
+			last = t;
+			continue;
+		}
+		if (t == '{')
+			Straddc(&node, '.');
+		else
+			Strprint(&node, "[]");
+		last = t;
+	}
+	o = j->cur;
+	if (o->t == JObj) {
+		t = (o->v.c == '{') ? 'o' : 'a';
+		print("%c\t%s\n", t, node.s);
+		json_next(j, 0);
+		JObj2r(j);
+		return;
+	}
+	t = (o->t == JStr) ? 's' : 'n';
+	print("%c\t%s%U=", t, node.s, o->k.s);
+	if (o->t == JNum)
+		print("%.17g\n", o->v.n);
+	else {
+		sdbr_escape(&tmp, o->v.s);
+		print("%s\n", tmp.s);
+	}
+}
+
+static int
+Ufmt(Fmt *fmt)
+{
+	char *s;
+
+	s = va_arg(fmt->args, char*);
+	if (!s)
+		return 0;
+	for (; *s; ++s) {
+		switch (*s) {
+		case ' ': fmtrune(fmt, '+'); break;
+		case '+': fmtprint(fmt, "\\x2b"); break;
+		case '=': fmtprint(fmt, "\\x3d"); break;
+		case '%': fmtprint(fmt, "\\x25"); break;
+		case '\f': fmtprint(fmt, "\\f"); break;
+		case '\n': fmtprint(fmt, "\\n"); break;
+		case '\r': fmtprint(fmt, "\\r"); break;
+		case '\t': fmtprint(fmt, "\\t"); break;
+		case '\v': fmtprint(fmt, "\\v"); break;
+		default: fmtrune(fmt, *s);
+		}
+	}
+	return 0;
+}
+
+void
+main(int argc, char *argv[])
+{
+	Json j;
+
+	fmtinstall('U', Ufmt);
+	Strinit(&node);
+	Strinit(&tmp);
+	json_init(&j, argv[1]);
+	for (;json_next(&j, 0);)
+		JObj2r(&j);
+	exits(0);
+}
diff --git a/src/cmd/sdb/mkfile b/src/cmd/sdb/mkfile
@@ -1,6 +1,7 @@
 <$PLAN9/src/mkhdr
 
 TARG=\
+	json2sdb\
 	sdbedit\
 	sdbjoin\
 	sdbmap\