44 lines
947 B
C++
44 lines
947 B
C++
/*
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* Buffer reusing string formatter
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*
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* by WangLu
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* 2012.11.29
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*/
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#ifndef STRINGFORMATTER_H__
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#define STRINGFORMATTER_H__
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#include <vector>
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#include <cstdio>
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namespace pdf2htmlEX {
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class StringFormatter
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{
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public:
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struct GuardedPointer
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{
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GuardedPointer(StringFormatter * sf) : sf(sf) { ++(sf->buf_cnt); }
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GuardedPointer(const GuardedPointer & gp) : sf(gp.sf) { ++(sf->buf_cnt); }
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~GuardedPointer(void) { --(sf->buf_cnt); }
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operator char* () const { return &(sf->buf.front()); }
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private:
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StringFormatter * sf;
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};
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StringFormatter() : buf_cnt(0) { buf.reserve(L_tmpnam); }
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/*
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* Important:
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* there is only one buffer, so new strings will replace old ones
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*/
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GuardedPointer operator () (const char * format, ...);
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private:
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friend class GuardedPointer;
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std::vector<char> buf;
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int buf_cnt;
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};
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} //namespace pdf2htmlEX
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#endif //STRINGFORMATTER_H__
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