simpleformatter.h

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
* Copyright (C) 2014-2016, International Business Machines
* Corporation and others.  All Rights Reserved.
******************************************************************************
* simpleformatter.h
*/

#ifndef __SIMPLEFORMATTER_H__
#define __SIMPLEFORMATTER_H__

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#include "unicode/unistr.h"

U_NAMESPACE_BEGIN

// Forward declaration:
namespace number {
namespace impl {
class SimpleModifier;
}
}

class U_COMMON_API SimpleFormatter final : public UMemory {
public:
    SimpleFormatter() : compiledPattern((char16_t)0) {}

    SimpleFormatter(const UnicodeString& pattern, UErrorCode &errorCode) {
        applyPattern(pattern, errorCode);
    }

    SimpleFormatter(const UnicodeString& pattern, int32_t min, int32_t max,
                    UErrorCode &errorCode) {
        applyPatternMinMaxArguments(pattern, min, max, errorCode);
    }

    SimpleFormatter(const SimpleFormatter& other)
            : compiledPattern(other.compiledPattern) {}

    SimpleFormatter &operator=(const SimpleFormatter& other);

    ~SimpleFormatter();

    UBool applyPattern(const UnicodeString &pattern, UErrorCode &errorCode) {
        return applyPatternMinMaxArguments(pattern, 0, INT32_MAX, errorCode);
    }

    UBool applyPatternMinMaxArguments(const UnicodeString &pattern,
                                      int32_t min, int32_t max, UErrorCode &errorCode);

    int32_t getArgumentLimit() const {
        return getArgumentLimit(compiledPattern.getBuffer(), compiledPattern.length());
    }

    UnicodeString &format(
            const UnicodeString &value0,
            UnicodeString &appendTo, UErrorCode &errorCode) const;

    UnicodeString &format(
            const UnicodeString &value0,
            const UnicodeString &value1,
            UnicodeString &appendTo, UErrorCode &errorCode) const;

    UnicodeString &format(
            const UnicodeString &value0,
            const UnicodeString &value1,
            const UnicodeString &value2,
            UnicodeString &appendTo, UErrorCode &errorCode) const;

    UnicodeString &formatAndAppend(
            const UnicodeString *const *values, int32_t valuesLength,
            UnicodeString &appendTo,
            int32_t *offsets, int32_t offsetsLength, UErrorCode &errorCode) const;

    UnicodeString &formatAndReplace(
            const UnicodeString *const *values, int32_t valuesLength,
            UnicodeString &result,
            int32_t *offsets, int32_t offsetsLength, UErrorCode &errorCode) const;

    UnicodeString getTextWithNoArguments() const {
        return getTextWithNoArguments(
            compiledPattern.getBuffer(),
            compiledPattern.length(),
            nullptr,
            0);
    }

#ifndef U_HIDE_INTERNAL_API

    UnicodeString getTextWithNoArguments(int32_t *offsets, int32_t offsetsLength) const {
        return getTextWithNoArguments(
            compiledPattern.getBuffer(),
            compiledPattern.length(),
            offsets,
            offsetsLength);
    }
#endif // U_HIDE_INTERNAL_API

private:
    UnicodeString compiledPattern;

    static inline int32_t getArgumentLimit(const char16_t *compiledPattern,
                                              int32_t compiledPatternLength) {
        return compiledPatternLength == 0 ? 0 : compiledPattern[0];
    }

    static UnicodeString getTextWithNoArguments(
        const char16_t *compiledPattern,
        int32_t compiledPatternLength,
        int32_t *offsets,
        int32_t offsetsLength);

    static UnicodeString &format(
            const char16_t *compiledPattern, int32_t compiledPatternLength,
            const UnicodeString *const *values,
            UnicodeString &result, const UnicodeString *resultCopy, UBool forbidResultAsValue,
            int32_t *offsets, int32_t offsetsLength,
            UErrorCode &errorCode);

    // Give access to internals to SimpleModifier for number formatting
    friend class number::impl::SimpleModifier;
};

U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif  // __SIMPLEFORMATTER_H__