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c04e09a770
type.h: 针对c++使用了c++23的using语法定义typedef memory.h/memory.c 提供了不对齐拷贝32位值的实现 其他大部分头文件，只是提供了c++的头文件支持
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/*
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* This file is part of libn3ds
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* Copyright (C) 2024 derrek, profi200
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <ctype.h>
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#include <string.h>
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#include "types.h"
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#include "util.h"
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void wait_cycles(u32 cycles)
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{
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__asm__ volatile
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(
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#ifdef __ARM9__
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"1: subs %0, %0, #4\n\t"
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#elif __ARM11__
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"1: subs %0, %0, #2\n\t"
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"yield\n\t"
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#endif // #ifdef __ARM9__
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"bhi 1b"
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: "+r" (cycles)
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:
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: "cc"
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);
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}
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size_t safeStrcpy(char *const dst, const char *const src, size_t num)
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{
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if(num == 0) return 0;
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const size_t len = strlen(src) + 1;
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if(len > num)
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{
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*dst = '\0';
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return 1;
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}
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memcpy(dst, src, len);
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return len;
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}
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// Limited to 6 decimal places. Doesn't support exponents.
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// Based on: https://codereview.stackexchange.com/a/158724
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double str2double(const char *str)
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{
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while(isspace((unsigned char)*str) != 0) str++; // Skip whitespaces.
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const double sign = (*str == '-' ? -1.0 : 1.0);
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if(*str == '-' || *str == '+') str++;
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double val = 0.0;
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while(isdigit((unsigned char)*str) != 0)
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{
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val = val * 10.0 + (*str - '0');
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str++;
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}
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if(*str == '.') str++;
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u32 place = 1;
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while(isdigit((unsigned char)*str) != 0)
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{
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val = val * 10.0 + (*str - '0');
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place *= 10;
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str++;
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}
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return val * sign / place;
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}
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float str2float(const char *str)
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{
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return str2double(str);
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} |