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-rw-r--r--src/univalue/include/univalue.h6
-rw-r--r--src/univalue/include/univalue_escapes.h261
-rw-r--r--src/univalue/include/univalue_utffilter.h119
3 files changed, 383 insertions, 3 deletions
diff --git a/src/univalue/include/univalue.h b/src/univalue/include/univalue.h
index f0d4de2035..22be0311e8 100644
--- a/src/univalue/include/univalue.h
+++ b/src/univalue/include/univalue.h
@@ -3,8 +3,8 @@
// Distributed under the MIT software license, see the accompanying
// file COPYING or https://opensource.org/licenses/mit-license.php.
-#ifndef __UNIVALUE_H__
-#define __UNIVALUE_H__
+#ifndef BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_H
+#define BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_H
#include <charconv>
#include <cstdint>
@@ -194,4 +194,4 @@ extern const UniValue NullUniValue;
const UniValue& find_value( const UniValue& obj, const std::string& name);
-#endif // __UNIVALUE_H__
+#endif // BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_H
diff --git a/src/univalue/include/univalue_escapes.h b/src/univalue/include/univalue_escapes.h
new file mode 100644
index 0000000000..83767e8ac5
--- /dev/null
+++ b/src/univalue/include/univalue_escapes.h
@@ -0,0 +1,261 @@
+#ifndef BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_ESCAPES_H
+#define BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_ESCAPES_H
+static const char *escapes[256] = {
+ "\\u0000",
+ "\\u0001",
+ "\\u0002",
+ "\\u0003",
+ "\\u0004",
+ "\\u0005",
+ "\\u0006",
+ "\\u0007",
+ "\\b",
+ "\\t",
+ "\\n",
+ "\\u000b",
+ "\\f",
+ "\\r",
+ "\\u000e",
+ "\\u000f",
+ "\\u0010",
+ "\\u0011",
+ "\\u0012",
+ "\\u0013",
+ "\\u0014",
+ "\\u0015",
+ "\\u0016",
+ "\\u0017",
+ "\\u0018",
+ "\\u0019",
+ "\\u001a",
+ "\\u001b",
+ "\\u001c",
+ "\\u001d",
+ "\\u001e",
+ "\\u001f",
+ nullptr,
+ nullptr,
+ "\\\"",
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ "\\\\",
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ "\\u007f",
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+ nullptr,
+};
+#endif // BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_ESCAPES_H
diff --git a/src/univalue/include/univalue_utffilter.h b/src/univalue/include/univalue_utffilter.h
new file mode 100644
index 0000000000..f688eaaa30
--- /dev/null
+++ b/src/univalue/include/univalue_utffilter.h
@@ -0,0 +1,119 @@
+// Copyright 2016 Wladimir J. van der Laan
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/licenses/mit-license.php.
+#ifndef BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_UTFFILTER_H
+#define BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_UTFFILTER_H
+
+#include <string>
+
+/**
+ * Filter that generates and validates UTF-8, as well as collates UTF-16
+ * surrogate pairs as specified in RFC4627.
+ */
+class JSONUTF8StringFilter
+{
+public:
+ explicit JSONUTF8StringFilter(std::string &s):
+ str(s), is_valid(true), codepoint(0), state(0), surpair(0)
+ {
+ }
+ // Write single 8-bit char (may be part of UTF-8 sequence)
+ void push_back(unsigned char ch)
+ {
+ if (state == 0) {
+ if (ch < 0x80) // 7-bit ASCII, fast direct pass-through
+ str.push_back(ch);
+ else if (ch < 0xc0) // Mid-sequence character, invalid in this state
+ is_valid = false;
+ else if (ch < 0xe0) { // Start of 2-byte sequence
+ codepoint = (ch & 0x1f) << 6;
+ state = 6;
+ } else if (ch < 0xf0) { // Start of 3-byte sequence
+ codepoint = (ch & 0x0f) << 12;
+ state = 12;
+ } else if (ch < 0xf8) { // Start of 4-byte sequence
+ codepoint = (ch & 0x07) << 18;
+ state = 18;
+ } else // Reserved, invalid
+ is_valid = false;
+ } else {
+ if ((ch & 0xc0) != 0x80) // Not a continuation, invalid
+ is_valid = false;
+ state -= 6;
+ codepoint |= (ch & 0x3f) << state;
+ if (state == 0)
+ push_back_u(codepoint);
+ }
+ }
+ // Write codepoint directly, possibly collating surrogate pairs
+ void push_back_u(unsigned int codepoint_)
+ {
+ if (state) // Only accept full codepoints in open state
+ is_valid = false;
+ if (codepoint_ >= 0xD800 && codepoint_ < 0xDC00) { // First half of surrogate pair
+ if (surpair) // Two subsequent surrogate pair openers - fail
+ is_valid = false;
+ else
+ surpair = codepoint_;
+ } else if (codepoint_ >= 0xDC00 && codepoint_ < 0xE000) { // Second half of surrogate pair
+ if (surpair) { // Open surrogate pair, expect second half
+ // Compute code point from UTF-16 surrogate pair
+ append_codepoint(0x10000 | ((surpair - 0xD800)<<10) | (codepoint_ - 0xDC00));
+ surpair = 0;
+ } else // Second half doesn't follow a first half - fail
+ is_valid = false;
+ } else {
+ if (surpair) // First half of surrogate pair not followed by second - fail
+ is_valid = false;
+ else
+ append_codepoint(codepoint_);
+ }
+ }
+ // Check that we're in a state where the string can be ended
+ // No open sequences, no open surrogate pairs, etc
+ bool finalize()
+ {
+ if (state || surpair)
+ is_valid = false;
+ return is_valid;
+ }
+private:
+ std::string &str;
+ bool is_valid;
+ // Current UTF-8 decoding state
+ unsigned int codepoint;
+ int state; // Top bit to be filled in for next UTF-8 byte, or 0
+
+ // Keep track of the following state to handle the following section of
+ // RFC4627:
+ //
+ // To escape an extended character that is not in the Basic Multilingual
+ // Plane, the character is represented as a twelve-character sequence,
+ // encoding the UTF-16 surrogate pair. So, for example, a string
+ // containing only the G clef character (U+1D11E) may be represented as
+ // "\uD834\uDD1E".
+ //
+ // Two subsequent \u.... may have to be replaced with one actual codepoint.
+ unsigned int surpair; // First half of open UTF-16 surrogate pair, or 0
+
+ void append_codepoint(unsigned int codepoint_)
+ {
+ if (codepoint_ <= 0x7f)
+ str.push_back((char)codepoint_);
+ else if (codepoint_ <= 0x7FF) {
+ str.push_back((char)(0xC0 | (codepoint_ >> 6)));
+ str.push_back((char)(0x80 | (codepoint_ & 0x3F)));
+ } else if (codepoint_ <= 0xFFFF) {
+ str.push_back((char)(0xE0 | (codepoint_ >> 12)));
+ str.push_back((char)(0x80 | ((codepoint_ >> 6) & 0x3F)));
+ str.push_back((char)(0x80 | (codepoint_ & 0x3F)));
+ } else if (codepoint_ <= 0x1FFFFF) {
+ str.push_back((char)(0xF0 | (codepoint_ >> 18)));
+ str.push_back((char)(0x80 | ((codepoint_ >> 12) & 0x3F)));
+ str.push_back((char)(0x80 | ((codepoint_ >> 6) & 0x3F)));
+ str.push_back((char)(0x80 | (codepoint_ & 0x3F)));
+ }
+ }
+};
+
+#endif // BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_UTFFILTER_H
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-02 06:20:36 +0000