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src/support/int2str.c
69 строк
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Tony Kelman
Change all julialang.org links to https
21 апр 2017, 13:13
21 апр 2017, 13:13
64d3374
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// This file is a part of Julia. License is MIT: https://julialang.org/license #include <stdlib.h> #include "dtypes.h" #include "utils.h" #ifdef __cplusplus extern "C" { #endif char *uint2str(char *dest, size_t len, uint64_t num, uint32_t base) { int i = len-1; uint64_t b = (uint64_t)base; char ch; dest[i--] = '\0'; while (i >= 0) { ch = (char)(num % b); if (ch < 10) ch += '0'; else ch = ch-10+'a'; dest[i--] = ch; num /= b; if (num == 0) break; } return &dest[i+1]; } int isdigit_base(char c, int base) { if (base < 11) return (c >= '0' && c < '0'+base); return ((c >= '0' && c <= '9') || (c >= 'a' && c < 'a'+base-10) || (c >= 'A' && c < 'A'+base-10)); } /* assumes valid base, returns 1 on error, 0 if OK */ /* int str2int(char *str, size_t len, int64_t *res, uint32_t base) { int64_t result, place; char digit; int i; place = 1; result = 0; for(i=len-1; i>=0; i--) { digit = str[i]; if (!isdigit_base(digit, base)) return 1; if (digit <= '9') digit -= '0'; else if (digit >= 'a') digit = digit-'a'+10; else if (digit >= 'A') digit = digit-'A'+10; result += digit * place; place *= base; } *res = result; return 0; } */ #ifdef __cplusplus } #endif