314 lines
8.6 KiB
Python
314 lines
8.6 KiB
Python
from stdint import *
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import t, c
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# 字符串复制函数
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def strcpy(dest: str, src: str) -> str:
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if dest == None or src == None: return None
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original_dest: str = dest
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for s in src:
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dest[0] = s
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dest += 1
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dest[0] = 0
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return original_dest
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# 有限长度字符串复制函数
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def strncpy(dest: str, src: str, n: t.CSizeT) -> str:
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if dest == None or src == None or n == 0: return dest
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original_dest: str = dest
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i: t.CSizeT = 0
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for s in src:
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if i >= n: break
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dest[0] = s
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dest += 1
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i += 1
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# 填充剩余空间为 '\0'
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while i < n:
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dest[0] = 0
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dest += 1
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i += 1
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return original_dest
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# 字符串长度函数
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def strlen(src: str) -> t.CSizeT | t.CExport:
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length: t.CSizeT = 0
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for _ in src:
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length += 1
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return length
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# 字符串比较函数
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def strcmp(str1: str, str2: str) -> t.CInt:
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while str1[0] != '\0' and str2[0] != '\0':
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if str1[0] != str2[0]:
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return str1[0] - str2[0]
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str1 += 1
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str2 += 1
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return str1[0] - str2[0]
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def samestr(str1: str, str2: str) -> bool:
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return strcmp(str1, str2) == 0
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# 有限长度字符串比较函数
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def strncmp(str1: str, str2: str, n: t.CSizeT) -> t.CInt:
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i: t.CSizeT = 0
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while str1[0] != '\0' and str2[0] != '\0' and i < n:
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if str1[0] != str2[0]:
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return str1[0] - str2[0]
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str1 += 1
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str2 += 1
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i += 1
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if i < n:
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return str1[0] - str2[0]
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return 0
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# 内存比较函数
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def memcmp(ptr1: t.CVoid | t.CPtr, ptr2: t.CVoid | t.CPtr, n: t.CSizeT) -> t.CInt:
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p1: BYTEPTR = BYTEPTR(ptr1)
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p2: BYTEPTR = BYTEPTR(ptr2)
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i: t.CSizeT = 0
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while i < n:
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if p1[i] != p2[i]:
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return t.CInt(p1[i]) - t.CInt(p2[i])
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i += 1
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return 0
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# 字符串查找函数
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def strchr(s: str, cr: t.CInt) -> str:
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while s[0] != '\0':
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if s[0] == t.CChar(cr):
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return str(s)
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s += 1
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if cr == '\0':
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return str(s)
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return None
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# 字符串反向查找函数（找最后一次出现的字符）
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def strrchr(s: str, cr: t.CInt) -> str:
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last: str = None
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while s[0] != '\0':
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if s[0] == t.CChar(cr):
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last = s
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s += 1
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if cr == '\0': return s
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return last
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# 跳过字符
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def strspn(s: str, skip: str = " ") -> int:
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si: int = 0
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while s[si] == skip:
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si += 1
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return si
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# 内存设置函数
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def memset(ptr: t.CVoid | t.CPtr, value: t.CInt, num: t.CSizeT) -> t.CVoid | t.CPtr | t.CExport:
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# 原始实现:
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# p: BYTEPTR = BYTEPTR(ptr)
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# i: t.CSizeT
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# for i in range(num):
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# p[i] = t.CUnsignedChar(value)
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if num == 0: return ptr
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c.Asm(f"""mov rdi, {c.AsmInp(ptr, t.ASM_DESCR.REG_ANY)}
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mov eax, {c.AsmInp(value, t.ASM_DESCR.REG_ANY)}
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mov rcx, {c.AsmInp(num, t.ASM_DESCR.REG_ANY)}
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rep stosb""",
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op=[t.ASM_DESCR.CLOBBER_MEMORY, t.ASM_DESCR.CLOBBER_RAX,
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t.ASM_DESCR.CLOBBER_RCX, t.ASM_DESCR.CLOBBER_RDI])
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return ptr
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def memset32(ptr: t.CVoid | t.CPtr, value: t.CUInt32T, count: t.CSizeT) -> t.CVoid | t.CPtr:
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# 原始实现:
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# p: UINT32PTR = UINT32PTR(ptr)
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# i: t.CSizeT
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# for i in range(count):
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# p[i] = value
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if count == 0: return ptr
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c.Asm(f"""mov rdi, {c.AsmInp(ptr, t.ASM_DESCR.REG_ANY)}
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mov eax, {c.AsmInp(value, t.ASM_DESCR.REG_ANY)}
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mov rcx, {c.AsmInp(count, t.ASM_DESCR.REG_ANY)}
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rep stosd""",
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op=[t.ASM_DESCR.CLOBBER_MEMORY, t.ASM_DESCR.CLOBBER_RAX,
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t.ASM_DESCR.CLOBBER_RCX, t.ASM_DESCR.CLOBBER_RDI])
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return ptr
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# 内存复制函数
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def memcpy(dest: t.CVoid | t.CPtr, src: t.CVoid | t.CPtr, num: t.CSizeT) -> t.CVoid | t.CPtr | t.CExport:
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# 原始实现:
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# d: BYTEPTR = BYTEPTR(dest)
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# s: BYTEPTR = BYTEPTR(src)
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# i: t.CSizeT
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# for i in range(num):
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# d[i] = s[i]
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if num == 0: return dest
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c.Asm(f"""mov rdi, {c.AsmInp(dest, t.ASM_DESCR.REG_ANY)}
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mov rsi, {c.AsmInp(src, t.ASM_DESCR.REG_ANY)}
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mov rcx, {c.AsmInp(num, t.ASM_DESCR.REG_ANY)}
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rep movsb""",
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op=[t.ASM_DESCR.CLOBBER_MEMORY, t.ASM_DESCR.CLOBBER_RCX,
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t.ASM_DESCR.CLOBBER_RDI, t.ASM_DESCR.CLOBBER_RSI])
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return dest
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# 内存移动函数
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def memmove(dest: t.CVoid | t.CPtr, src: t.CVoid | t.CPtr, num: t.CSizeT) -> t.CVoid | t.CPtr:
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# 原始实现:
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# d: BYTEPTR = BYTEPTR(dest)
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# s: BYTEPTR = BYTEPTR(src)
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# i: t.CSizeT
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# if d < s:
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# for i in range(num):
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# d[i] = s[i]
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# elif d > s:
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# for i in range(num, 0, -1):
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# d[i - 1] = s[i - 1]
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if num == 0: return dest
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c.Asm(f"""mov rdi, {c.AsmInp(dest, t.ASM_DESCR.REG_ANY)}
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mov rsi, {c.AsmInp(src, t.ASM_DESCR.REG_ANY)}
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mov rcx, {c.AsmInp(num, t.ASM_DESCR.REG_ANY)}
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cmp rdi, rsi
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jb 2f
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std
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add rdi, rcx
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dec rdi
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add rsi, rcx
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dec rsi
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rep movsb
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cld
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jmp 3f
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2:
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rep movsb
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3:""",
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op=[t.ASM_DESCR.CLOBBER_MEMORY, t.ASM_DESCR.CLOBBER_RCX,
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t.ASM_DESCR.CLOBBER_RDI, t.ASM_DESCR.CLOBBER_RSI])
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return dest
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def atoi(src: str) -> t.CInt:
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num: t.CInt = 0
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sign: t.CInt = 1
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s: str = src
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if s == None: return 0
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# 跳过空白
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while s[0] == ' ' or s[0] == '\t' or s[0] == '\n' or s[0] == '\r':
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s += 1
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# 符号
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if s[0] == '-':
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sign = -1
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s += 1
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elif s[0] == '+':
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s += 1
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for ch in s:
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if ch < '0' or ch > '9': break
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digit: t.CInt = ch - '0'
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num = num * 10 + digit
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return num * sign
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def atoll(src: str) -> t.CInt64T:
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num: t.CInt64T = 0
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sign: t.CInt64T = 1
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s: str = src
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if s == None: return 0
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while s[0] == ' ' or s[0] == '\t' or s[0] == '\n' or s[0] == '\r':
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s += 1
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if s[0] == '-':
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sign = -1
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s += 1
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elif s[0] == '+':
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s += 1
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for ch in s:
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if ch < '0' or ch > '9': break
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d: t.CInt = ch - '0'
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digit: t.CInt64T = t.CInt64T(d)
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num = num * 10 + digit
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return num * sign
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def atof(src: str) -> t.CDouble:
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s: str = src
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if s == None: return 0.0
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# 跳过空白
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while s[0] == ' ' or s[0] == '\t' or s[0] == '\n' or s[0] == '\r':
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s += 1
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# 符号
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sign: t.CDouble = 1.0
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if s[0] == '-':
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sign = -1.0
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s += 1
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elif s[0] == '+':
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s += 1
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# 整数部分
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int_part: t.CDouble = 0.0
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for ch in s:
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if ch < '0' or ch > '9': break
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d1: t.CInt = ch - '0'
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int_part = int_part * 10.0 + t.CDouble(d1)
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s += 1
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# 小数部分
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frac_part: t.CDouble = 0.0
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frac_div: t.CDouble = 1.0
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if s[0] == '.':
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s += 1
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for ch in s:
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if ch < '0' or ch > '9': break
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d2: t.CInt = ch - '0'
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frac_div = frac_div * 10.0
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frac_part = frac_part * 10.0 + t.CDouble(d2)
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s += 1
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# 指数部分
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exp: t.CInt = 0
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exp_sign: t.CInt = 1
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if s[0] == 'e' or s[0] == 'E':
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s += 1
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if s[0] == '-':
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exp_sign = -1
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s += 1
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elif s[0] == '+':
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s += 1
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for ch in s:
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if ch < '0' or ch > '9': break
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d3: t.CInt = ch - '0'
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exp = exp * 10 + d3
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s += 1
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exp = exp * exp_sign
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result: t.CDouble = sign * (int_part + frac_part / frac_div)
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# 应用指数
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if exp > 0:
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while exp > 0:
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result = result * 10.0
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exp -= 1
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elif exp < 0:
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while exp < 0:
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result = result / 10.0
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exp += 1
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return result
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def split(s: str, delim: str, result: list[str]) -> int:
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count: int = 0
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start: str = s
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if not s or not delim or not result:
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return 0
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d: t.CChar = delim[0] # 单分隔符
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while start[0]:
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# 跳过分隔符
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while start[0] == d: start += 1
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if not start[0]: break
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# 记录token起始
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result[count] = start
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count += 1
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# 找到下一个分隔符，截断
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while start[0] and start[0] != d: start += 1
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if start[0]:
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start[0] = '\0'
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start += 1
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result[count] = None # 结尾标记
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return count |