X-Git-Url: http://git.archive.openwrt.org/?p=project%2Flibubox.git;a=blobdiff_plain;f=blobmsg_json.c;h=3053fa3c8eaf13e0ee61bc251230c97321b1816d;hp=aad4d97b55fef442f4d73f31eaf9b49a42807f89;hb=309d7d456f1934a75755504791ad23554a3359d6;hpb=7e9712363b23faf80ba207793fcbcc94bc4bd053

diff --git a/blobmsg_json.c b/blobmsg_json.c
index aad4d97..3053fa3 100644
--- a/blobmsg_json.c
+++ b/blobmsg_json.c
@@ -1,3 +1,18 @@
+/*
+ * blobmsg - library for generating/parsing structured blob messages
+ *
+ * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
 #include "blobmsg.h"
 #include "blobmsg_json.h"
 
@@ -75,3 +90,217 @@ out:
 	return ret;
 }
 
+
+struct strbuf {
+	int len;
+	int pos;
+	char *buf;
+
+	blobmsg_json_format_t custom_format;
+	void *priv;
+	bool indent;
+	int indent_level;
+};
+
+static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
+{
+	if (len <= 0)
+		return true;
+
+	if (s->pos + len >= s->len) {
+		s->len += 16;
+		s->buf = realloc(s->buf, s->len);
+		if (!s->buf)
+			return false;
+	}
+	memcpy(s->buf + s->pos, c, len);
+	s->pos += len;
+	return true;
+}
+
+static void add_separator(struct strbuf *s)
+{
+	static char indent_chars[17] = "\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
+	static const char indent_space = ' ';
+	int indent;
+	char *start;
+
+	if (!s->indent) {
+		blobmsg_puts(s, &indent_space, 1);
+		return;
+	}
+
+	indent = s->indent_level;
+	if (indent > 16)
+		indent = 16;
+
+	start = &indent_chars[sizeof(indent_chars) - indent - 1];
+	*start = '\n';
+	blobmsg_puts(s, start, indent + 1);
+	*start = '\t';
+}
+
+
+static void blobmsg_format_string(struct strbuf *s, const char *str)
+{
+	const char *p, *last = str, *end = str + strlen(str);
+	char buf[8] = "\\u00";
+
+	blobmsg_puts(s, "\"", 1);
+	for (p = str; *p; p++) {
+		char escape = '\0';
+		int len;
+
+		switch(*p) {
+		case '\b':
+			escape = 'b';
+			break;
+		case '\n':
+			escape = 'n';
+			break;
+		case '\t':
+			escape = 't';
+			break;
+		case '\r':
+			escape = 'r';
+			break;
+		case '"':
+		case '\\':
+		case '/':
+			escape = *p;
+			break;
+		default:
+			if (*p < ' ')
+				escape = 'u';
+			break;
+		}
+
+		if (!escape)
+			continue;
+
+		if (p > last)
+			blobmsg_puts(s, last, p - last);
+		last = p + 1;
+		buf[1] = escape;
+
+		if (escape == 'u') {
+			sprintf(buf + 4, "%02x", (unsigned char) *p);
+			len = 4;
+		} else {
+			len = 2;
+		}
+		blobmsg_puts(s, buf, len);
+	}
+
+	blobmsg_puts(s, last, end - last);
+	blobmsg_puts(s, "\"", 1);
+}
+
+static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array);
+
+static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, bool array, bool head)
+{
+	const char *data_str;
+	char buf[32];
+	void *data;
+	int len;
+
+	if (!blobmsg_check_attr(attr, false))
+		return;
+
+	if (!array && blobmsg_name(attr)[0]) {
+		blobmsg_format_string(s, blobmsg_name(attr));
+		blobmsg_puts(s, ": ", 2);
+	}
+	if (head) {
+		data = blob_data(attr);
+		len = blob_len(attr);
+	} else {
+		data = blobmsg_data(attr);
+		len = blobmsg_data_len(attr);
+
+		if (s->custom_format) {
+			data_str = s->custom_format(s->priv, attr);
+			if (data_str)
+				goto out;
+		}
+	}
+
+	data_str = buf;
+	switch(blob_id(attr)) {
+	case BLOBMSG_TYPE_BOOL:
+		sprintf(buf, "%s", *(uint8_t *)data ? "true" : "false");
+		break;
+	case BLOBMSG_TYPE_INT32:
+		sprintf(buf, "%d", *(uint32_t *)data);
+		break;
+	case BLOBMSG_TYPE_INT64:
+		sprintf(buf, "%lld", (long long int) *(uint64_t *)data);
+		break;
+	case BLOBMSG_TYPE_STRING:
+		blobmsg_format_string(s, data);
+		return;
+	case BLOBMSG_TYPE_ARRAY:
+		blobmsg_format_json_list(s, data, len, true);
+		return;
+	case BLOBMSG_TYPE_TABLE:
+		blobmsg_format_json_list(s, data, len, false);
+		return;
+	}
+
+out:
+	blobmsg_puts(s, data_str, strlen(data_str));
+}
+
+static void blobmsg_format_json_list(struct strbuf *s, struct blob_attr *attr, int len, bool array)
+{
+	struct blob_attr *pos;
+	bool first = true;
+	int rem = len;
+
+	blobmsg_puts(s, (array ? "[" : "{" ), 1);
+	s->indent_level++;
+	add_separator(s);
+	__blob_for_each_attr(pos, attr, rem) {
+		if (!first) {
+			blobmsg_puts(s, ",", 1);
+			add_separator(s);
+		}
+
+		blobmsg_format_element(s, pos, array, false);
+		first = false;
+	}
+	s->indent_level--;
+	add_separator(s);
+	blobmsg_puts(s, (array ? "]" : "}"), 1);
+}
+
+char *blobmsg_format_json_with_cb(struct blob_attr *attr, bool list, blobmsg_json_format_t cb, void *priv, int indent)
+{
+	struct strbuf s;
+
+	s.len = blob_len(attr);
+	s.buf = malloc(s.len);
+	s.pos = 0;
+	s.custom_format = cb;
+	s.priv = priv;
+	s.indent = false;
+
+	if (indent >= 0) {
+		s.indent = true;
+		s.indent_level = indent;
+	}
+
+	if (list)
+		blobmsg_format_json_list(&s, blob_data(attr), blob_len(attr), false);
+	else
+		blobmsg_format_element(&s, attr, false, false);
+
+	if (!s.len)
+		return NULL;
+
+	s.buf = realloc(s.buf, s.pos + 1);
+	s.buf[s.pos] = 0;
+
+	return s.buf;
+}