29 lines
587 B
C
29 lines
587 B
C
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#include <common/stdlib.h>
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/**
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* @brief 将长整型转换为字符串
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*
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* @param input 输入的数据
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* @return const char* 结果字符串
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*/
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const char *ltoa(long input)
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{
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/* large enough for -9223372036854775808 */
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static char buffer[21] = {0};
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char *pos = buffer + sizeof(buffer) - 1;
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int neg = input < 0;
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unsigned long n = neg ? -input : input;
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*pos-- = '\0';
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do
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{
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*pos-- = '0' + n % 10;
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n /= 10;
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if (pos < buffer)
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return pos + 1;
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} while (n);
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if (neg)
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*pos-- = '-';
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return pos + 1;
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}
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