s_to_n32_unsafe.h File Reference

#include "src/util/attribute.h"
#include "src/util/c99_stdint.h"

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Functions
bool	s_to_u32_unsafe (const char *s, const char *s_end, uint32_t &number) RE2C_GXX_ATTRIBUTE((warn_unused_result))
bool	s_to_i32_unsafe (const char *s, const char *s_end, int32_t &number) RE2C_GXX_ATTRIBUTE((warn_unused_result))

Function Documentation

bool s_to_i32_unsafe	(	const char *	s,
		const char *	s_end,
		int32_t &	number
	)

Definition at line 25 of file s_to_n32_unsafe.cc.

{
    int64_t i = 0;
    if (*s == '-')
    {
        ++s;
        for (; s != s_end; ++s)
        {
            i *= 10;
            i -= *s - 0x30;
            if (i < std::numeric_limits<int32_t>::min())
            {
                return false;
            }
        }
    }
    else
    {
        for (; s != s_end; ++s)
        {
            i *= 10;
            i += *s - 0x30;
            if (i > std::numeric_limits<int32_t>::max())
            {
                return false;
            }
        }
    }
    number = static_cast<int32_t> (i);
    return true;
}

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bool s_to_u32_unsafe	(	const char *	s,
		const char *	s_end,
		uint32_t &	number
	)

Definition at line 7 of file s_to_n32_unsafe.cc.

{
    uint64_t u = 0;
    for (; s != s_end; ++s)
    {
        u *= 10;
        u += static_cast<uint32_t> (*s) - 0x30;
        if (u >= std::numeric_limits<uint32_t>::max())
        {
            return false;
        }
    }
    number = static_cast<uint32_t> (u);
    return true;
}

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