1 files changed, 234 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/formattedvalue.cpp b/intl/icu/source/i18n/formattedvalue.cpp
new file mode 100644
index 0000000000..aacd6ac70e
--- /dev/null
+++ b/intl/icu/source/i18n/formattedvalue.cpp
@@ -0,0 +1,234 @@
+// © 2018 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/formattedvalue.h"
+#include "formattedval_impl.h"
+#include "capi_helper.h"
+
+U_NAMESPACE_BEGIN
+
+
+ConstrainedFieldPosition::ConstrainedFieldPosition() {}
+
+ConstrainedFieldPosition::~ConstrainedFieldPosition() {}
+
+void ConstrainedFieldPosition::reset() {
+    fContext = 0LL;
+    fField = 0;
+    fStart = 0;
+    fLimit = 0;
+    fConstraint = UCFPOS_CONSTRAINT_NONE;
+    fCategory = UFIELD_CATEGORY_UNDEFINED;
+}
+
+void ConstrainedFieldPosition::constrainCategory(int32_t category) {
+    fConstraint = UCFPOS_CONSTRAINT_CATEGORY;
+    fCategory = category;
+}
+
+void ConstrainedFieldPosition::constrainField(int32_t category, int32_t field) {
+    fConstraint = UCFPOS_CONSTRAINT_FIELD;
+    fCategory = category;
+    fField = field;
+}
+
+void ConstrainedFieldPosition::setInt64IterationContext(int64_t context) {
+    fContext = context;
+}
+
+UBool ConstrainedFieldPosition::matchesField(int32_t category, int32_t field) const {
+    switch (fConstraint) {
+    case UCFPOS_CONSTRAINT_NONE:
+        return true;
+    case UCFPOS_CONSTRAINT_CATEGORY:
+        return fCategory == category;
+    case UCFPOS_CONSTRAINT_FIELD:
+        return fCategory == category && fField == field;
+    default:
+        UPRV_UNREACHABLE_EXIT;
+    }
+}
+
+void ConstrainedFieldPosition::setState(
+        int32_t category,
+        int32_t field,
+        int32_t start,
+        int32_t limit) {
+    fCategory = category;
+    fField = field;
+    fStart = start;
+    fLimit = limit;
+}
+
+
+FormattedValue::~FormattedValue() = default;
+
+
+///////////////////////
+/// C API FUNCTIONS ///
+///////////////////////
+
+struct UConstrainedFieldPositionImpl : public UMemory,
+        // Magic number as ASCII == "UCF"
+        public IcuCApiHelper<UConstrainedFieldPosition, UConstrainedFieldPositionImpl, 0x55434600> {
+    ConstrainedFieldPosition fImpl;
+};
+
+U_CAPI UConstrainedFieldPosition* U_EXPORT2
+ucfpos_open(UErrorCode* ec) {
+    auto* impl = new UConstrainedFieldPositionImpl();
+    if (impl == nullptr) {
+        *ec = U_MEMORY_ALLOCATION_ERROR;
+        return nullptr;
+    }
+    return impl->exportForC();
+}
+
+U_CAPI void U_EXPORT2
+ucfpos_reset(UConstrainedFieldPosition* ptr, UErrorCode* ec) {
+    auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return;
+    }
+    impl->fImpl.reset();
+}
+
+U_CAPI void U_EXPORT2
+ucfpos_constrainCategory(UConstrainedFieldPosition* ptr, int32_t category, UErrorCode* ec) {
+    auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return;
+    }
+    impl->fImpl.constrainCategory(category);
+}
+
+U_CAPI void U_EXPORT2
+ucfpos_constrainField(UConstrainedFieldPosition* ptr, int32_t category, int32_t field, UErrorCode* ec) {
+    auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return;
+    }
+    impl->fImpl.constrainField(category, field);
+}
+
+U_CAPI int32_t U_EXPORT2
+ucfpos_getCategory(const UConstrainedFieldPosition* ptr, UErrorCode* ec) {
+    const auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return UFIELD_CATEGORY_UNDEFINED;
+    }
+    return impl->fImpl.getCategory();
+}
+
+U_CAPI int32_t U_EXPORT2
+ucfpos_getField(const UConstrainedFieldPosition* ptr, UErrorCode* ec) {
+    const auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return 0;
+    }
+    return impl->fImpl.getField();
+}
+
+U_CAPI void U_EXPORT2
+ucfpos_getIndexes(const UConstrainedFieldPosition* ptr, int32_t* pStart, int32_t* pLimit, UErrorCode* ec) {
+    const auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return;
+    }
+    *pStart = impl->fImpl.getStart();
+    *pLimit = impl->fImpl.getLimit();
+}
+
+U_CAPI int64_t U_EXPORT2
+ucfpos_getInt64IterationContext(const UConstrainedFieldPosition* ptr, UErrorCode* ec) {
+    const auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return 0;
+    }
+    return impl->fImpl.getInt64IterationContext();
+}
+
+U_CAPI void U_EXPORT2
+ucfpos_setInt64IterationContext(UConstrainedFieldPosition* ptr, int64_t context, UErrorCode* ec) {
+    auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return;
+    }
+    impl->fImpl.setInt64IterationContext(context);
+}
+
+U_CAPI UBool U_EXPORT2
+ucfpos_matchesField(const UConstrainedFieldPosition* ptr, int32_t category, int32_t field, UErrorCode* ec) {
+    const auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return 0;
+    }
+    return impl->fImpl.matchesField(category, field);
+}
+
+U_CAPI void U_EXPORT2
+ucfpos_setState(
+        UConstrainedFieldPosition* ptr,
+        int32_t category,
+        int32_t field,
+        int32_t start,
+        int32_t limit,
+        UErrorCode* ec) {
+    auto* impl = UConstrainedFieldPositionImpl::validate(ptr, *ec);
+    if (U_FAILURE(*ec)) {
+        return;
+    }
+    impl->fImpl.setState(category, field, start, limit);
+}
+
+U_CAPI void U_EXPORT2
+ucfpos_close(UConstrainedFieldPosition* ptr) {
+    UErrorCode localStatus = U_ZERO_ERROR;
+    auto* impl = UConstrainedFieldPositionImpl::validate(ptr, localStatus);
+    delete impl;
+}
+
+
+U_CAPI const char16_t* U_EXPORT2
+ufmtval_getString(
+        const UFormattedValue* ufmtval,
+        int32_t* pLength,
+        UErrorCode* ec) {
+    const auto* impl = UFormattedValueApiHelper::validate(ufmtval, *ec);
+    if (U_FAILURE(*ec)) {
+        return nullptr;
+    }
+    UnicodeString readOnlyAlias = impl->fFormattedValue->toTempString(*ec);
+    if (U_FAILURE(*ec)) {
+        return nullptr;
+    }
+    if (pLength != nullptr) {
+        *pLength = readOnlyAlias.length();
+    }
+    // Note: this line triggers -Wreturn-local-addr, but it is safe because toTempString is
+    // defined to return memory owned by the ufmtval argument.
+    return readOnlyAlias.getBuffer();
+}
+
+
+U_CAPI UBool U_EXPORT2
+ufmtval_nextPosition(
+        const UFormattedValue* ufmtval,
+        UConstrainedFieldPosition* ucfpos,
+        UErrorCode* ec) {
+    const auto* fmtval = UFormattedValueApiHelper::validate(ufmtval, *ec);
+    auto* cfpos = UConstrainedFieldPositionImpl::validate(ucfpos, *ec);
+    if (U_FAILURE(*ec)) {
+        return false;
+    }
+    return fmtval->fFormattedValue->nextPosition(cfpos->fImpl, *ec);
+}
+
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */