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diff --git a/winpr/libwinpr/crt/unicode_builtin.c b/winpr/libwinpr/crt/unicode_builtin.c
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+/*
+ * Copyright 2001-2004 Unicode, Inc.
+ *
+ * Disclaimer
+ *
+ * This source code is provided as is by Unicode, Inc. No claims are
+ * made as to fitness for any particular purpose. No warranties of any
+ * kind are expressed or implied. The recipient agrees to determine
+ * applicability of information provided. If this file has been
+ * purchased on magnetic or optical media from Unicode, Inc., the
+ * sole remedy for any claim will be exchange of defective media
+ * within 90 days of receipt.
+ *
+ * Limitations on Rights to Redistribute This Code
+ *
+ * Unicode, Inc. hereby grants the right to freely use the information
+ * supplied in this file in the creation of products supporting the
+ * Unicode Standard, and to make copies of this file in any form
+ * for internal or external distribution as long as this notice
+ * remains attached.
+ */
+
+/* ---------------------------------------------------------------------
+
+Conversions between UTF32, UTF-16, and UTF-8. Source code file.
+Author: Mark E. Davis, 1994.
+Rev History: Rick McGowan, fixes & updates May 2001.
+Sept 2001: fixed const & error conditions per
+mods suggested by S. Parent & A. Lillich.
+June 2002: Tim Dodd added detection and handling of incomplete
+source sequences, enhanced error detection, added casts
+to eliminate compiler warnings.
+July 2003: slight mods to back out aggressive FFFE detection.
+Jan 2004: updated switches in from-UTF8 conversions.
+Oct 2004: updated to use UNI_MAX_LEGAL_UTF32 in UTF-32 conversions.
+
+See the header file "utf.h" for complete documentation.
+
+------------------------------------------------------------------------ */
+
+#include <winpr/wtypes.h>
+#include <winpr/string.h>
+#include <winpr/assert.h>
+
+#include "unicode.h"
+
+#include "../log.h"
+#define TAG WINPR_TAG("unicode")
+
+/*
+ * Character Types:
+ *
+ * UTF8: uint8_t 8 bits
+ * UTF16: uint16_t 16 bits
+ * UTF32: uint32_t 32 bits
+ */
+
+/* Some fundamental constants */
+#define UNI_REPLACEMENT_CHAR (uint32_t)0x0000FFFD
+#define UNI_MAX_BMP (uint32_t)0x0000FFFF
+#define UNI_MAX_UTF16 (uint32_t)0x0010FFFF
+#define UNI_MAX_UTF32 (uint32_t)0x7FFFFFFF
+#define UNI_MAX_LEGAL_UTF32 (uint32_t)0x0010FFFF
+
+typedef enum
+{
+ conversionOK, /* conversion successful */
+ sourceExhausted, /* partial character in source, but hit end */
+ targetExhausted, /* insuff. room in target for conversion */
+ sourceIllegal /* source sequence is illegal/malformed */
+} ConversionResult;
+
+typedef enum
+{
+ strictConversion = 0,
+ lenientConversion
+} ConversionFlags;
+
+static const int halfShift = 10; /* used for shifting by 10 bits */
+
+static const uint32_t halfBase = 0x0010000UL;
+static const uint32_t halfMask = 0x3FFUL;
+
+#define UNI_SUR_HIGH_START (uint32_t)0xD800
+#define UNI_SUR_HIGH_END (uint32_t)0xDBFF
+#define UNI_SUR_LOW_START (uint32_t)0xDC00
+#define UNI_SUR_LOW_END (uint32_t)0xDFFF
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * Index into the table below with the first byte of a UTF-8 sequence to
+ * get the number of trailing bytes that are supposed to follow it.
+ * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is
+ * left as-is for anyone who may want to do such conversion, which was
+ * allowed in earlier algorithms.
+ */
+static const char trailingBytesForUTF8[256] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5
+};
+
+/*
+ * Magic values subtracted from a buffer value during UTF8 conversion.
+ * This table contains as many values as there might be trailing bytes
+ * in a UTF-8 sequence.
+ */
+static const uint32_t offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL,
+ 0x03C82080UL, 0xFA082080UL, 0x82082080UL };
+
+/*
+ * Once the bits are split out into bytes of UTF-8, this is a mask OR-ed
+ * into the first byte, depending on how many bytes follow. There are
+ * as many entries in this table as there are UTF-8 sequence types.
+ * (I.e., one byte sequence, two byte... etc.). Remember that sequencs
+ * for *legal* UTF-8 will be 4 or fewer bytes total.
+ */
+static const uint8_t firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
+
+/* --------------------------------------------------------------------- */
+
+/* The interface converts a whole buffer to avoid function-call overhead.
+ * Constants have been gathered. Loops & conditionals have been removed as
+ * much as possible for efficiency, in favor of drop-through switches.
+ * (See "Note A" at the bottom of the file for equivalent code.)
+ * If your compiler supports it, the "isLegalUTF8" call can be turned
+ * into an inline function.
+ */
+
+/* --------------------------------------------------------------------- */
+
+static ConversionResult winpr_ConvertUTF16toUTF8_Internal(const uint16_t** sourceStart,
+ const uint16_t* sourceEnd,
+ uint8_t** targetStart, uint8_t* targetEnd,
+ ConversionFlags flags)
+{
+ bool computeLength = (!targetEnd) ? true : false;
+ const uint16_t* source = *sourceStart;
+ uint8_t* target = *targetStart;
+ ConversionResult result = conversionOK;
+
+ while (source < sourceEnd)
+ {
+ uint32_t ch = 0;
+ unsigned short bytesToWrite = 0;
+ const uint32_t byteMask = 0xBF;
+ const uint32_t byteMark = 0x80;
+ const uint16_t* oldSource =
+ source; /* In case we have to back up because of target overflow. */
+
+ ch = *source++;
+
+ /* If we have a surrogate pair, convert to UTF32 first. */
+ if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END)
+ {
+ /* If the 16 bits following the high surrogate are in the source buffer... */
+ if (source < sourceEnd)
+ {
+ uint32_t ch2 = *source;
+
+ /* If it's a low surrogate, convert to UTF32. */
+ if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END)
+ {
+ ch = ((ch - UNI_SUR_HIGH_START) << halfShift) + (ch2 - UNI_SUR_LOW_START) +
+ halfBase;
+ ++source;
+ }
+ else if (flags == strictConversion)
+ {
+ /* it's an unpaired high surrogate */
+ --source; /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ }
+ }
+ else
+ {
+ /* We don't have the 16 bits following the high surrogate. */
+ --source; /* return to the high surrogate */
+ result = sourceExhausted;
+ break;
+ }
+ }
+ else if (flags == strictConversion)
+ {
+ /* UTF-16 surrogate values are illegal in UTF-32 */
+ if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END)
+ {
+ --source; /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ }
+ }
+
+ /* Figure out how many bytes the result will require */
+ if (ch < (uint32_t)0x80)
+ {
+ bytesToWrite = 1;
+ }
+ else if (ch < (uint32_t)0x800)
+ {
+ bytesToWrite = 2;
+ }
+ else if (ch < (uint32_t)0x10000)
+ {
+ bytesToWrite = 3;
+ }
+ else if (ch < (uint32_t)0x110000)
+ {
+ bytesToWrite = 4;
+ }
+ else
+ {
+ bytesToWrite = 3;
+ ch = UNI_REPLACEMENT_CHAR;
+ }
+
+ target += bytesToWrite;
+
+ if ((target > targetEnd) && (!computeLength))
+ {
+ source = oldSource; /* Back up source pointer! */
+ target -= bytesToWrite;
+ result = targetExhausted;
+ break;
+ }
+
+ if (!computeLength)
+ {
+ switch (bytesToWrite)
+ {
+ /* note: everything falls through. */
+ case 4:
+ *--target = (uint8_t)((ch | byteMark) & byteMask);
+ ch >>= 6;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+ case 3:
+ *--target = (uint8_t)((ch | byteMark) & byteMask);
+ ch >>= 6;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 2:
+ *--target = (uint8_t)((ch | byteMark) & byteMask);
+ ch >>= 6;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 1:
+ *--target = (uint8_t)(ch | firstByteMark[bytesToWrite]);
+ }
+ }
+ else
+ {
+ switch (bytesToWrite)
+ {
+ /* note: everything falls through. */
+ case 4:
+ --target;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 3:
+ --target;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 2:
+ --target;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 1:
+ --target;
+ }
+ }
+
+ target += bytesToWrite;
+ }
+
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+}
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * Utility routine to tell whether a sequence of bytes is legal UTF-8.
+ * This must be called with the length pre-determined by the first byte.
+ * If not calling this from ConvertUTF8to*, then the length can be set by:
+ * length = trailingBytesForUTF8[*source]+1;
+ * and the sequence is illegal right away if there aren't that many bytes
+ * available.
+ * If presented with a length > 4, this returns false. The Unicode
+ * definition of UTF-8 goes up to 4-byte sequences.
+ */
+
+static bool isLegalUTF8(const uint8_t* source, int length)
+{
+ uint8_t a = 0;
+ const uint8_t* srcptr = source + length;
+
+ switch (length)
+ {
+ default:
+ return false;
+
+ /* Everything else falls through when "true"... */
+ case 4:
+ if ((a = (*--srcptr)) < 0x80 || a > 0xBF)
+ return false;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 3:
+ if ((a = (*--srcptr)) < 0x80 || a > 0xBF)
+ return false;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 2:
+ if ((a = (*--srcptr)) > 0xBF)
+ return false;
+
+ switch (*source)
+ {
+ /* no fall-through in this inner switch */
+ case 0xE0:
+ if (a < 0xA0)
+ return false;
+
+ break;
+
+ case 0xED:
+ if (a > 0x9F)
+ return false;
+
+ break;
+
+ case 0xF0:
+ if (a < 0x90)
+ return false;
+
+ break;
+
+ case 0xF4:
+ if (a > 0x8F)
+ return false;
+
+ break;
+
+ default:
+ if (a < 0x80)
+ return false;
+ break;
+ }
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 1:
+ if (*source >= 0x80 && *source < 0xC2)
+ return false;
+ }
+
+ if (*source > 0xF4)
+ return false;
+
+ return true;
+}
+
+/* --------------------------------------------------------------------- */
+
+static ConversionResult winpr_ConvertUTF8toUTF16_Internal(const uint8_t** sourceStart,
+ const uint8_t* sourceEnd,
+ uint16_t** targetStart,
+ uint16_t* targetEnd,
+ ConversionFlags flags)
+{
+ bool computeLength = (!targetEnd) ? true : false;
+ ConversionResult result = conversionOK;
+ const uint8_t* source = *sourceStart;
+ uint16_t* target = *targetStart;
+
+ while (source < sourceEnd)
+ {
+ uint32_t ch = 0;
+ unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
+
+ if ((source + extraBytesToRead) >= sourceEnd)
+ {
+ result = sourceExhausted;
+ break;
+ }
+
+ /* Do this check whether lenient or strict */
+ if (!isLegalUTF8(source, extraBytesToRead + 1))
+ {
+ result = sourceIllegal;
+ break;
+ }
+
+ /*
+ * The cases all fall through. See "Note A" below.
+ */
+ switch (extraBytesToRead)
+ {
+ case 5:
+ ch += *source++;
+ ch <<= 6; /* remember, illegal UTF-8 */
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 4:
+ ch += *source++;
+ ch <<= 6; /* remember, illegal UTF-8 */
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 3:
+ ch += *source++;
+ ch <<= 6;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 2:
+ ch += *source++;
+ ch <<= 6;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 1:
+ ch += *source++;
+ ch <<= 6;
+ /* fallthrough */
+ WINPR_FALLTHROUGH
+
+ case 0:
+ ch += *source++;
+ }
+
+ ch -= offsetsFromUTF8[extraBytesToRead];
+
+ if ((target >= targetEnd) && (!computeLength))
+ {
+ source -= (extraBytesToRead + 1); /* Back up source pointer! */
+ result = targetExhausted;
+ break;
+ }
+
+ if (ch <= UNI_MAX_BMP)
+ {
+ /* Target is a character <= 0xFFFF */
+ /* UTF-16 surrogate values are illegal in UTF-32 */
+ if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END)
+ {
+ if (flags == strictConversion)
+ {
+ source -= (extraBytesToRead + 1); /* return to the illegal value itself */
+ result = sourceIllegal;
+ break;
+ }
+ else
+ {
+ if (!computeLength)
+ *target++ = UNI_REPLACEMENT_CHAR;
+ else
+ target++;
+ }
+ }
+ else
+ {
+ if (!computeLength)
+ *target++ = (uint16_t)ch; /* normal case */
+ else
+ target++;
+ }
+ }
+ else if (ch > UNI_MAX_UTF16)
+ {
+ if (flags == strictConversion)
+ {
+ result = sourceIllegal;
+ source -= (extraBytesToRead + 1); /* return to the start */
+ break; /* Bail out; shouldn't continue */
+ }
+ else
+ {
+ if (!computeLength)
+ *target++ = UNI_REPLACEMENT_CHAR;
+ else
+ target++;
+ }
+ }
+ else
+ {
+ /* target is a character in range 0xFFFF - 0x10FFFF. */
+ if ((target + 1 >= targetEnd) && (!computeLength))
+ {
+ source -= (extraBytesToRead + 1); /* Back up source pointer! */
+ result = targetExhausted;
+ break;
+ }
+
+ ch -= halfBase;
+
+ if (!computeLength)
+ {
+ *target++ = (uint16_t)((ch >> halfShift) + UNI_SUR_HIGH_START);
+ *target++ = (uint16_t)((ch & halfMask) + UNI_SUR_LOW_START);
+ }
+ else
+ {
+ target++;
+ target++;
+ }
+ }
+ }
+
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+}
+
+/**
+ * WinPR built-in Unicode API
+ */
+
+static int winpr_ConvertUTF8toUTF16(const uint8_t* src, int cchSrc, uint16_t* dst, int cchDst)
+{
+ size_t length = 0;
+ uint16_t* dstBeg = NULL;
+ uint16_t* dstEnd = NULL;
+ const uint8_t* srcBeg = NULL;
+ const uint8_t* srcEnd = NULL;
+ ConversionResult result = sourceIllegal;
+
+ if (cchSrc == -1)
+ cchSrc = strlen((char*)src) + 1;
+
+ srcBeg = src;
+ srcEnd = &src[cchSrc];
+
+ if (cchDst == 0)
+ {
+ result =
+ winpr_ConvertUTF8toUTF16_Internal(&srcBeg, srcEnd, &dstBeg, dstEnd, strictConversion);
+
+ length = dstBeg - (uint16_t*)NULL;
+ }
+ else
+ {
+ dstBeg = dst;
+ dstEnd = &dst[cchDst];
+
+ result =
+ winpr_ConvertUTF8toUTF16_Internal(&srcBeg, srcEnd, &dstBeg, dstEnd, strictConversion);
+
+ length = dstBeg - dst;
+ }
+
+ if (result == targetExhausted)
+ {
+ SetLastError(ERROR_INSUFFICIENT_BUFFER);
+ return 0;
+ }
+
+ return (result == conversionOK) ? length : 0;
+}
+
+static int winpr_ConvertUTF16toUTF8(const uint16_t* src, int cchSrc, uint8_t* dst, int cchDst)
+{
+ size_t length = 0;
+ uint8_t* dstBeg = NULL;
+ uint8_t* dstEnd = NULL;
+ const uint16_t* srcBeg = NULL;
+ const uint16_t* srcEnd = NULL;
+ ConversionResult result = sourceIllegal;
+
+ if (cchSrc == -1)
+ cchSrc = _wcslen((uint16_t*)src) + 1;
+
+ srcBeg = src;
+ srcEnd = &src[cchSrc];
+
+ if (cchDst == 0)
+ {
+ result =
+ winpr_ConvertUTF16toUTF8_Internal(&srcBeg, srcEnd, &dstBeg, dstEnd, strictConversion);
+
+ length = dstBeg - ((uint8_t*)NULL);
+ }
+ else
+ {
+ dstBeg = dst;
+ dstEnd = &dst[cchDst];
+
+ result =
+ winpr_ConvertUTF16toUTF8_Internal(&srcBeg, srcEnd, &dstBeg, dstEnd, strictConversion);
+
+ length = dstBeg - dst;
+ }
+
+ if (result == targetExhausted)
+ {
+ SetLastError(ERROR_INSUFFICIENT_BUFFER);
+ return 0;
+ }
+
+ return (result == conversionOK) ? length : 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+int int_MultiByteToWideChar(UINT CodePage, DWORD dwFlags, LPCSTR lpMultiByteStr, int cbMultiByte,
+ LPWSTR lpWideCharStr, int cchWideChar)
+{
+ size_t cbCharLen = (size_t)cbMultiByte;
+
+ WINPR_UNUSED(dwFlags);
+
+ /* If cbMultiByte is 0, the function fails */
+ if ((cbMultiByte == 0) || (cbMultiByte < -1))
+ return 0;
+
+ if (cchWideChar < 0)
+ return -1;
+
+ if (cbMultiByte < 0)
+ {
+ const size_t len = strlen(lpMultiByteStr);
+ if (len >= INT32_MAX)
+ return 0;
+ cbCharLen = (int)len + 1;
+ }
+ else
+ cbCharLen = cbMultiByte;
+
+ WINPR_ASSERT(lpMultiByteStr);
+ switch (CodePage)
+ {
+ case CP_ACP:
+ case CP_UTF8:
+ break;
+
+ default:
+ WLog_ERR(TAG, "Unsupported encoding %u", CodePage);
+ return 0;
+ }
+
+ return winpr_ConvertUTF8toUTF16((const uint8_t*)lpMultiByteStr, cbCharLen,
+ (uint16_t*)lpWideCharStr, cchWideChar);
+}
+
+int int_WideCharToMultiByte(UINT CodePage, DWORD dwFlags, LPCWSTR lpWideCharStr, int cchWideChar,
+ LPSTR lpMultiByteStr, int cbMultiByte, LPCSTR lpDefaultChar,
+ LPBOOL lpUsedDefaultChar)
+{
+ size_t cbCharLen = (size_t)cchWideChar;
+
+ WINPR_UNUSED(dwFlags);
+ /* If cchWideChar is 0, the function fails */
+ if ((cchWideChar == 0) || (cchWideChar < -1))
+ return 0;
+
+ if (cbMultiByte < 0)
+ return -1;
+
+ WINPR_ASSERT(lpWideCharStr);
+ /* If cchWideChar is -1, the string is null-terminated */
+ if (cchWideChar == -1)
+ {
+ const size_t len = _wcslen(lpWideCharStr);
+ if (len >= INT32_MAX)
+ return 0;
+ cbCharLen = (int)len + 1;
+ }
+ else
+ cbCharLen = cchWideChar;
+
+ /*
+ * if cbMultiByte is 0, the function returns the required buffer size
+ * in bytes for lpMultiByteStr and makes no use of the output parameter itself.
+ */
+
+ return winpr_ConvertUTF16toUTF8((const uint16_t*)lpWideCharStr, cbCharLen,
+ (uint8_t*)lpMultiByteStr, cbMultiByte);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 16:55:00 +0000