From 78034bcd615e739ad51a1b4bc570b6f1927932fc Mon Sep 17 00:00:00 2001
From: George Hazan <george.hazan@gmail.com>
Date: Wed, 17 Jan 2024 18:05:48 +0300
Subject: json2file + file2json = helpers to load json from file and write it
 back

---
 libs/libjson/src/libJSON.cpp   | 40 ++++++++++++++++++++++++++++++++++++++++
 libs/libjson/src/libjson.def   |  2 ++
 libs/libjson/src/libjson64.def |  2 ++
 libs/libjson/src/stdafx.h      |  1 +
 4 files changed, 45 insertions(+)

(limited to 'libs/libjson/src')

diff --git a/libs/libjson/src/libJSON.cpp b/libs/libjson/src/libJSON.cpp
index 7cd2255d4a..3dd7544afa 100644
--- a/libs/libjson/src/libJSON.cpp
+++ b/libs/libjson/src/libJSON.cpp
@@ -458,3 +458,43 @@ LIBJSON_DLL(int) json_equal(JSONNode *node, JSONNode *node2) {
 	JSON_ASSERT_SAFE(node2, JSON_TEXT("null node2 to json_equal"), return false;);
 	return *node == *node2;
 }
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
+LIBJSON_DLL(bool) file2json(const wchar_t *pwszFilename, JSONNode &root)
+{
+	if (!pwszFilename)
+		return false;
+
+	int fileId = _wopen(pwszFilename, _O_BINARY | _O_RDONLY);
+	if (fileId == -1)
+		return false;
+
+	size_t dwFileLength = _filelength(fileId), dwReadLen;
+	ptrA szBuf((char *)mir_alloc(dwFileLength + 1));
+	dwReadLen = _read(fileId, szBuf, (unsigned)dwFileLength);
+	_close(fileId);
+	if (dwFileLength != dwReadLen)
+		return false;
+
+	szBuf[dwFileLength] = 0;
+
+	root = JSONNode::parse(szBuf);
+	if (!root)
+		return false;
+
+	return true;
+}
+
+LIBJSON_DLL(bool) json2file(const JSONNode &root, const wchar_t *pwszFilename)
+{
+	auto szBody = root.write_formatted();
+
+	int fileId = _wopen(pwszFilename, _O_CREAT | _O_TRUNC | _O_WRONLY, _S_IREAD | _S_IWRITE);
+	if (fileId == -1)
+		return false;
+
+	int cbLen = _write(fileId, szBody.c_str(), (unsigned)szBody.length());
+	_close(fileId);
+	return cbLen == (int)szBody.length();
+}
diff --git a/libs/libjson/src/libjson.def b/libs/libjson/src/libjson.def
index debf2a9ff5..5cbfc3394a 100644
--- a/libs/libjson/src/libjson.def
+++ b/libs/libjson/src/libjson.def
@@ -211,3 +211,5 @@ json_write_formatted @191
 ??9JSONNode@@QBE_N_K@Z @208 NONAME
 ??6@YGAAVJSONNode@@AAV0@ABUSINT64_PARAM@@@Z @209 NONAME
 ??0JSONNode@@QAE@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@PB_W@Z @210 NONAME
+?file2json@@YG_NPB_WAAVJSONNode@@@Z @211 NONAME
+?json2file@@YG_NABVJSONNode@@PB_W@Z @212 NONAME
diff --git a/libs/libjson/src/libjson64.def b/libs/libjson/src/libjson64.def
index c46a354d53..5ed328af4b 100644
--- a/libs/libjson/src/libjson64.def
+++ b/libs/libjson/src/libjson64.def
@@ -211,3 +211,5 @@ json_write_formatted @191
 ??9JSONNode@@QEBA_N_K@Z @208 NONAME
 ??6@YAAEAVJSONNode@@AEAV0@AEBUSINT64_PARAM@@@Z @209 NONAME
 ??0JSONNode@@QEAA@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@PEB_W@Z @210 NONAME
+?file2json@@YA_NPEB_WAEAVJSONNode@@@Z @211 NONAME
+?json2file@@YA_NAEBVJSONNode@@PEB_W@Z @212 NONAME
diff --git a/libs/libjson/src/stdafx.h b/libs/libjson/src/stdafx.h
index e9d52cfe52..5e22df85fd 100644
--- a/libs/libjson/src/stdafx.h
+++ b/libs/libjson/src/stdafx.h
@@ -32,6 +32,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include <stddef.h>
 #include <process.h>
 #include <io.h>
+#include <fcntl.h>
 #include <limits.h>
 #include <string.h>
 #include <locale.h>
-- 
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