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#include "memory.h"
#include <lib.h>
#include <stddef.h>
int memcmp(const void *restrict vl, const void *restrict vr, unsigned long n) {
const unsigned char *l = vl, *r = vr;
for (; n && *l == *r; n--, l++, r++);
return n ? *l-*r : 0;
}
void *memcpy(void *restrict dest, const void *restrict src, unsigned long n) {
char *d = dest;
const char *s = src;
for (; n; n--) *d++ = *s++;
return dest;
}
void *memmove(void *dest, const void *src, unsigned long n) {
char *d = dest;
const char *s = src;
if (d==s) return d;
if (d<s) {
for (; n; n--) *d++ = *s++;
} else {
while (n) n--, d[n] = s[n];
}
return dest;
}
void *memset(void *restrict dest, int c, unsigned long n) {
unsigned char *d = dest;
for (; n; n--) *d++ = c;
return dest;
}
int strncmp(const char *restrict lhs, const char *restrict rhs, unsigned long n) {
const unsigned char *l=(void *)lhs, *r=(void *)rhs;
if (!n--) return 0;
for (; *l && *r && n && *l == *r ; l++, r++, n--);
return *l - *r;
}
char *strcpy(char *restrict dest, const char *restrict src) {
for(; (*dest = *src); dest++, src++);
return dest;
}
char *strncpy(char *restrict dest, const char *restrict src, unsigned long n) {
for(; (*dest = *src) && n; dest++, src++, n--);
memset(dest, 0, n);
return dest;
}
size_t strlen(const char *str) {
const char *p;
for(p = str; *p != 0; p++) {}
return p - str;
}
char *strcat(char *restrict dst, const char *restrict src) {
strcpy(dst + strlen(dst), src);
return dst;
}
int isspace(int c) {
switch (c) {
case ' ':
case '\t':
case '\v':
case '\f':
case '\r':
case '\n':
return 1;
default:
return 0;
}
}
int isdigit(int c) {
return c - '0' > -1 && c - '0' < 10;
}
#define ATOX(name, type) \
type name(const char* s) { \
for(; isspace(*s); s++); \
int neg = 0; \
switch (*s) { \
case '-': \
neg = 1; \
/* FALLTHRU */ \
case '+': \
s++; \
break; \
} \
type num = 0; \
for (; *s == '0'; s++); \
for (; isdigit(*s); s++) { \
num *= 10; \
num += *s - '0'; \
} \
return num * (neg ? -1 : 1); \
}
ATOX(atoi, int)
ATOX(atol, long int)
ATOX(atoll, long long int)
char itoc(int i) {
if(i < 10) {
return '0' + i;
} else {
return 'a' + (i - 10);
}
}
int ctoi(char c) {
if(c < 'A') {
return c - '0';
} else if(c < 'a') {
return c - 'A' + 10;
} else {
return c - 'a' + 10;
}
}
static char fs_endings[] = {'K', 'M', 'G', 'T', 'P'};
static size_t nth_pow(size_t i, size_t e) {
size_t a = i;
while(--e)
a *= i;
return a;
}
static char nth_digit(size_t bytes, size_t place) {
while (1) {
if (bytes < nth_pow(10, place))
break;
bytes /= 10;
}
return bytes %= 10;
}
char *btoa(const size_t bytes, char *buf) {
char *start = buf;
int idx = -1;
size_t b = bytes;
size_t s = b;
while (1) {
if (b < 1000)
break;
s = b;
b /= 1024;
idx++;
}
if (idx == -1) {
ultoa(bytes, buf, 10);
return start;
}
s = s * 1000 / 1024;
if (s < 1024) {
b = 1024;
idx--;
}
char fd = nth_digit(s, 1);
char sd = nth_digit(s, 2);
char td = nth_digit(s, 3);
*buf = fd + '0';
buf++;
if (b < 10) {
*buf = '.';
buf++;
}
*buf = sd + '0';
buf++;
if (b < 10)
goto end;
if (b > 99) {
*buf = td + '0';
buf++;
}
end:
*buf = fs_endings[idx];
buf++;
*buf = '\0';
return start;
}
#define UXTOA(type, name) \
char *name(unsigned type n, char *buffer, int radix) { \
if (n == 0) { \
buffer[0] = '0'; \
buffer[1] = '\0'; \
return buffer; \
} \
char *start = buffer; \
for (; n; n /= radix) { \
*buffer++ = itoc(n % radix); \
} \
*buffer-- = '\0'; \
while(buffer > start) { \
char tmp = *start; \
*start++ = *buffer; \
*buffer-- = tmp; \
} \
return buffer; \
}
UXTOA(int, utoa)
UXTOA(long int, ultoa)
UXTOA(long long int, ulltoa)
#define XTOA(type, name) \
char *name(type n, char* buffer, int radix) { \
if (n == 0) { \
buffer[0] = '0'; \
buffer[1] = '\0'; \
return buffer; \
} \
if (n < 0) { \
*buffer++ = '-'; \
n = -n; \
} \
char *start = buffer; \
for (; n; n /= radix) { \
*buffer++ = itoc(n % radix); \
} \
*buffer-- = '\0'; \
while(buffer > start) { \
char tmp = *start; \
*start++ = *buffer; \
*buffer-- = tmp; \
} \
return buffer; \
}
XTOA(int, itoa)
XTOA(long int, ltoa)
XTOA(long long int, lltoa)
#define STRTOX(name, type) \
type name(const char *s, char **endptr, int radix) { \
*endptr = NULL; \
for(; isspace(*s); s++); \
int neg = 0; \
switch (*s) { \
case '-': \
neg = 1; \
/* FALLTHRU */ \
case '+': \
s++; \
break; \
} \
if (!radix) { \
if (*s == '0') { \
s++; \
if (*s == 'x' || *s == 'X') { \
s++; \
radix = 16; \
} else { \
radix = 8; \
} \
} else { \
radix = 10; \
} \
} \
for (; *s == '0'; s++, *endptr = (void*) s); \
type num = 0; \
for (; isdigit(*s); s++, *endptr = (void*) s) { \
num *= radix; \
num += *s - '0'; \
} \
return num * (neg ? -1 : 1); \
}
STRTOX(strtoi, int)
STRTOX(strtol, long int)
STRTOX(strtoll, long long int)
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