Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 273 insertions, 0 deletions

diff --git a/intl/icu/source/common/charstr.cpp b/intl/icu/source/common/charstr.cpp
new file mode 100644
index 0000000000..f76cc8a4dc
--- /dev/null
+++ b/intl/icu/source/common/charstr.cpp
@@ -0,0 +1,273 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*   Copyright (C) 2010-2015, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*******************************************************************************
+*   file name:  charstr.cpp
+*   encoding:   UTF-8
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 2010may19
+*   created by: Markus W. Scherer
+*/
+
+#include <cstdlib>
+
+#include "unicode/utypes.h"
+#include "unicode/putil.h"
+#include "charstr.h"
+#include "cmemory.h"
+#include "cstring.h"
+#include "uinvchar.h"
+#include "ustr_imp.h"
+
+U_NAMESPACE_BEGIN
+
+CharString::CharString(CharString&& src) noexcept
+        : buffer(std::move(src.buffer)), len(src.len) {
+    src.len = 0;  // not strictly necessary because we make no guarantees on the source string
+}
+
+CharString& CharString::operator=(CharString&& src) noexcept {
+    buffer = std::move(src.buffer);
+    len = src.len;
+    src.len = 0;  // not strictly necessary because we make no guarantees on the source string
+    return *this;
+}
+
+char *CharString::cloneData(UErrorCode &errorCode) const {
+    if (U_FAILURE(errorCode)) { return nullptr; }
+    char *p = static_cast<char *>(uprv_malloc(len + 1));
+    if (p == nullptr) {
+        errorCode = U_MEMORY_ALLOCATION_ERROR;
+        return nullptr;
+    }
+    uprv_memcpy(p, buffer.getAlias(), len + 1);
+    return p;
+}
+
+int32_t CharString::extract(char *dest, int32_t capacity, UErrorCode &errorCode) const {
+    if (U_FAILURE(errorCode)) { return len; }
+    if (capacity < 0 || (capacity > 0 && dest == nullptr)) {
+        errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+        return len;
+    }
+    const char *src = buffer.getAlias();
+    if (0 < len && len <= capacity && src != dest) {
+        uprv_memcpy(dest, src, len);
+    }
+    return u_terminateChars(dest, capacity, len, &errorCode);
+}
+
+CharString &CharString::copyFrom(const CharString &s, UErrorCode &errorCode) {
+    if(U_SUCCESS(errorCode) && this!=&s && ensureCapacity(s.len+1, 0, errorCode)) {
+        len=s.len;
+        uprv_memcpy(buffer.getAlias(), s.buffer.getAlias(), len+1);
+    }
+    return *this;
+}
+
+int32_t CharString::lastIndexOf(char c) const {
+    for(int32_t i=len; i>0;) {
+        if(buffer[--i]==c) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+bool CharString::contains(StringPiece s) const {
+    if (s.empty()) { return false; }
+    const char *p = buffer.getAlias();
+    int32_t lastStart = len - s.length();
+    for (int32_t i = 0; i <= lastStart; ++i) {
+        if (uprv_memcmp(p + i, s.data(), s.length()) == 0) {
+            return true;
+        }
+    }
+    return false;
+}
+
+CharString &CharString::truncate(int32_t newLength) {
+    if(newLength<0) {
+        newLength=0;
+    }
+    if(newLength<len) {
+        buffer[len=newLength]=0;
+    }
+    return *this;
+}
+
+CharString &CharString::append(char c, UErrorCode &errorCode) {
+    if(ensureCapacity(len+2, 0, errorCode)) {
+        buffer[len++]=c;
+        buffer[len]=0;
+    }
+    return *this;
+}
+
+CharString &CharString::append(const char *s, int32_t sLength, UErrorCode &errorCode) {
+    if(U_FAILURE(errorCode)) {
+        return *this;
+    }
+    if(sLength<-1 || (s==nullptr && sLength!=0)) {
+        errorCode=U_ILLEGAL_ARGUMENT_ERROR;
+        return *this;
+    }
+    if(sLength<0) {
+        sLength= static_cast<int32_t>(uprv_strlen(s));
+    }
+    if(sLength>0) {
+        if(s==(buffer.getAlias()+len)) {
+            // The caller wrote into the getAppendBuffer().
+            if(sLength>=(buffer.getCapacity()-len)) {
+                // The caller wrote too much.
+                errorCode=U_INTERNAL_PROGRAM_ERROR;
+            } else {
+                buffer[len+=sLength]=0;
+            }
+        } else if(buffer.getAlias()<=s && s<(buffer.getAlias()+len) &&
+                  sLength>=(buffer.getCapacity()-len)
+        ) {
+            // (Part of) this string is appended to itself which requires reallocation,
+            // so we have to make a copy of the substring and append that.
+            return append(CharString(s, sLength, errorCode), errorCode);
+        } else if(ensureCapacity(len+sLength+1, 0, errorCode)) {
+            uprv_memcpy(buffer.getAlias()+len, s, sLength);
+            buffer[len+=sLength]=0;
+        }
+    }
+    return *this;
+}
+
+CharString &CharString::appendNumber(int32_t number, UErrorCode &status) {
+    if (number < 0) {
+        this->append('-', status);
+        if (U_FAILURE(status)) {
+            return *this;
+        }
+    }
+
+    if (number == 0) {
+        this->append('0', status);
+        return *this;
+    }
+
+    int32_t numLen = 0;
+    while (number != 0) {
+        int32_t residue = number % 10;
+        number /= 10;
+        this->append(std::abs(residue) + '0', status);
+        numLen++;
+        if (U_FAILURE(status)) {
+            return *this;
+        }
+    }
+
+    int32_t start = this->length() - numLen, end = this->length() - 1;
+    while(start < end) {
+        std::swap(this->data()[start++], this->data()[end--]);
+    }
+
+    return *this;
+}
+
+char *CharString::getAppendBuffer(int32_t minCapacity,
+                                  int32_t desiredCapacityHint,
+                                  int32_t &resultCapacity,
+                                  UErrorCode &errorCode) {
+    if(U_FAILURE(errorCode)) {
+        resultCapacity=0;
+        return nullptr;
+    }
+    int32_t appendCapacity=buffer.getCapacity()-len-1;  // -1 for NUL
+    if(appendCapacity>=minCapacity) {
+        resultCapacity=appendCapacity;
+        return buffer.getAlias()+len;
+    }
+    if(ensureCapacity(len+minCapacity+1, len+desiredCapacityHint+1, errorCode)) {
+        resultCapacity=buffer.getCapacity()-len-1;
+        return buffer.getAlias()+len;
+    }
+    resultCapacity=0;
+    return nullptr;
+}
+
+CharString &CharString::appendInvariantChars(const UnicodeString &s, UErrorCode &errorCode) {
+    return appendInvariantChars(s.getBuffer(), s.length(), errorCode);
+}
+
+CharString &CharString::appendInvariantChars(const char16_t* uchars, int32_t ucharsLen, UErrorCode &errorCode) {
+    if(U_FAILURE(errorCode)) {
+        return *this;
+    }
+    if (!uprv_isInvariantUString(uchars, ucharsLen)) {
+        errorCode = U_INVARIANT_CONVERSION_ERROR;
+        return *this;
+    }
+    if(ensureCapacity(len+ucharsLen+1, 0, errorCode)) {
+        u_UCharsToChars(uchars, buffer.getAlias()+len, ucharsLen);
+        len += ucharsLen;
+        buffer[len] = 0;
+    }
+    return *this;
+}
+
+UBool CharString::ensureCapacity(int32_t capacity,
+                                 int32_t desiredCapacityHint,
+                                 UErrorCode &errorCode) {
+    if(U_FAILURE(errorCode)) {
+        return false;
+    }
+    if(capacity>buffer.getCapacity()) {
+        if(desiredCapacityHint==0) {
+            desiredCapacityHint=capacity+buffer.getCapacity();
+        }
+        if( (desiredCapacityHint<=capacity || buffer.resize(desiredCapacityHint, len+1)==nullptr) &&
+            buffer.resize(capacity, len+1)==nullptr
+        ) {
+            errorCode=U_MEMORY_ALLOCATION_ERROR;
+            return false;
+        }
+    }
+    return true;
+}
+
+CharString &CharString::appendPathPart(StringPiece s, UErrorCode &errorCode) {
+    if(U_FAILURE(errorCode)) {
+        return *this;
+    }
+    if(s.length()==0) {
+        return *this;
+    }
+    char c;
+    if(len>0 && (c=buffer[len-1])!=U_FILE_SEP_CHAR && c!=U_FILE_ALT_SEP_CHAR) {
+        append(getDirSepChar(), errorCode);
+    }
+    append(s, errorCode);
+    return *this;
+}
+
+CharString &CharString::ensureEndsWithFileSeparator(UErrorCode &errorCode) {
+    char c;
+    if(U_SUCCESS(errorCode) && len>0 &&
+            (c=buffer[len-1])!=U_FILE_SEP_CHAR && c!=U_FILE_ALT_SEP_CHAR) {
+        append(getDirSepChar(), errorCode);
+    }
+    return *this;
+}
+
+char CharString::getDirSepChar() const {
+    char dirSepChar = U_FILE_SEP_CHAR;
+#if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR)
+    // We may need to return a different directory separator when building for Cygwin or MSYS2.
+    if(len>0 && !uprv_strchr(data(), U_FILE_SEP_CHAR) && uprv_strchr(data(), U_FILE_ALT_SEP_CHAR))
+        dirSepChar = U_FILE_ALT_SEP_CHAR;
+#endif
+    return dirSepChar;
+}
+
+U_NAMESPACE_END