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Rev 1617 Rev 1623
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    data->string[data->len] = 0;
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    data->string[data->len] = 0;
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    return count;  
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    return count;  
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}
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}
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/** Print formatted to the given buffer with limited size.
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 * @param str   buffer
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 * @param size  buffer size
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 * @param fmt   format string
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 * \see For more details about format string see printf_core.
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 */
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int vsnprintf(char *str, size_t size, const char *fmt, va_list ap)
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int vsnprintf(char *str, size_t size, const char *fmt, va_list ap)
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{
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{
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    struct vsnprintf_data data = {size, 0, str};
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    struct vsnprintf_data data = {size, 0, str};
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    struct printf_spec ps = {(int(*)(void *, size_t, void *))vsnprintf_write, &data};
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    struct printf_spec ps = {(int(*)(void *, size_t, void *))vsnprintf_write, &data};
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