user: implement mlibc as the libc, finally.
It's finally done.. Signed-off-by: kaguya <vpshinomiya@protonmail.com>
This commit is contained in:
kaguya
@@ -0,0 +1,550 @@
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#undef _GNU_SOURCE
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#include <string.h>
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#include <errno.h>
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#include <wchar.h>
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#include <ctype.h>
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#include <bits/ensure.h>
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#include <mlibc/strtol.hpp>
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// memset() is defined in options/internals.
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// memcpy() is defined in options/internals.
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// memmove() is defined in options/internals.
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// strlen() is defined in options/internals.
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char *strcpy(char *__restrict dest, const char *src) {
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char *dest_bytes = (char *)dest;
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char *src_bytes = (char *)src;
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while(*src_bytes)
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*(dest_bytes++) = *(src_bytes++);
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*dest_bytes = 0;
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return dest;
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}
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char *strncpy(char *__restrict dest, const char *src, size_t max_size) {
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auto dest_bytes = static_cast<char *>(dest);
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auto src_bytes = static_cast<const char *>(src);
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size_t i = 0;
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while(*src_bytes && i < max_size) {
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*(dest_bytes++) = *(src_bytes++);
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i++;
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}
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while(i < max_size) {
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*(dest_bytes++) = 0;
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i++;
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}
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return dest;
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}
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char *strcat(char *__restrict dest, const char *__restrict src) {
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strcpy(dest + strlen(dest), src);
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return dest;
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}
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char *strncat(char *__restrict dest, const char *__restrict src, size_t max_size) {
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auto dest_bytes = static_cast<char *>(dest);
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auto src_bytes = static_cast<const char *>(src);
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dest_bytes += strlen(dest);
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size_t i = 0;
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while(*src_bytes && i < max_size) {
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*(dest_bytes++) = *(src_bytes++);
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i++;
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}
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*dest_bytes = 0;
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return dest;
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}
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int memcmp(const void *a, const void *b, size_t size) {
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for(size_t i = 0; i < size; i++) {
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auto a_byte = static_cast<const unsigned char *>(a)[i];
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auto b_byte = static_cast<const unsigned char *>(b)[i];
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if(a_byte < b_byte)
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return -1;
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if(a_byte > b_byte)
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return 1;
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}
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return 0;
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}
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int strcmp(const char *a, const char *b) {
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size_t i = 0;
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while(true) {
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unsigned char a_byte = a[i];
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unsigned char b_byte = b[i];
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if(!a_byte && !b_byte)
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return 0;
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// If only one char is null, one of the following cases applies.
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if(a_byte < b_byte)
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return -1;
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if(a_byte > b_byte)
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return 1;
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i++;
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}
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}
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int strcoll(const char *a, const char *b) {
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// TODO: strcoll should take "LC_COLLATE" into account.
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return strcmp(a, b);
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}
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int strncmp(const char *a, const char *b, size_t max_size) {
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size_t i = 0;
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while(true) {
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if(!(i < max_size))
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return 0;
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unsigned char a_byte = a[i];
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unsigned char b_byte = b[i];
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if(!a_byte && !b_byte)
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return 0;
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// If only one char is null, one of the following cases applies.
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if(a_byte < b_byte)
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return -1;
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if(a_byte > b_byte)
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return 1;
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i++;
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}
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}
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size_t strxfrm(char *__restrict dest, const char *__restrict src, size_t n) {
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// NOTE: This might not work for non ANSI charsets.
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size_t l = strlen(src);
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// man page: If the value returned is n or more, the contents of dest are indeterminate.
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if(n > l)
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strncpy(dest, src, n);
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return l;
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}
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void *memchr(const void *s, int c, size_t size) {
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auto s_bytes = static_cast<const unsigned char *>(s);
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for(size_t i = 0; i < size; i++)
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if(s_bytes[i] == static_cast<unsigned char>(c))
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return const_cast<unsigned char *>(s_bytes + i);
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return nullptr;
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}
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char *strchr(const char *s, int c) {
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size_t i = 0;
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while(s[i]) {
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if(s[i] == c)
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return const_cast<char *>(&s[i]);
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i++;
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}
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if(c == 0)
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return const_cast<char *>(&s[i]);
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return nullptr;
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}
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size_t strcspn(const char *s, const char *chrs) {
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size_t n = 0;
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while(true) {
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if(!s[n] || strchr(chrs, s[n]))
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return n;
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n++;
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}
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}
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char *strpbrk(const char *s, const char *chrs) {
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size_t n = 0;
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while(s[n]) {
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if(strchr(chrs, s[n]))
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return const_cast<char *>(s + n);
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n++;
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}
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return nullptr;
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}
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char *strrchr(const char *s, int c) {
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// The null-terminator is considered to be part of the string.
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size_t length = strlen(s);
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for(size_t i = 0; i <= length; i++) {
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if(s[length - i] == c)
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return const_cast<char *>(s + (length - i));
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}
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return nullptr;
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}
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size_t strspn(const char *s, const char *chrs) {
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size_t n = 0;
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while(true) {
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if(!s[n] || !strchr(chrs, s[n]))
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return n;
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n++;
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}
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}
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char *strstr(const char *s, const char *pattern) {
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for(size_t i = 0; s[i]; i++) {
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bool found = true;
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for(size_t j = 0; pattern[j]; j++) {
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if(!pattern[j] || s[i + j] == pattern[j])
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continue;
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found = false;
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break;
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}
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if(found)
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return const_cast<char *>(&s[i]);
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}
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return nullptr;
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}
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char *strtok_r(char *__restrict s, const char *__restrict del, char **__restrict m) {
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__ensure(m);
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// We use *m = null to memorize that the entire string was consumed.
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char *tok;
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if(s) {
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tok = s;
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}else if(*m) {
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tok = *m;
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}else {
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return nullptr;
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}
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// Skip initial delimiters.
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// After this loop: *tok is non-null iff we return a token.
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while(*tok && strchr(del, *tok))
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tok++;
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// Replace the following delimiter by a null-terminator.
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// After this loop: *p is null iff we reached the end of the string.
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auto p = tok;
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while(*p && !strchr(del, *p))
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p++;
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if(*p) {
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*p = 0;
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*m = p + 1;
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}else{
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*m = nullptr;
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}
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if(p == tok)
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return nullptr;
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return tok;
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}
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char *strtok(char *__restrict s, const char *__restrict delimiter) {
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static char *saved;
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return strtok_r(s, delimiter, &saved);
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}
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// This is a GNU extension.
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char *strchrnul(const char *s, int c) {
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size_t i = 0;
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while(s[i]) {
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if(s[i] == c)
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return const_cast<char *>(s + i);
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i++;
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}
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return const_cast<char *>(s + i);
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}
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double wcstod(const wchar_t *__restrict, wchar_t **__restrict) { MLIBC_STUB_BODY; }
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float wcstof(const wchar_t *__restrict, wchar_t **__restrict) { MLIBC_STUB_BODY; }
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long double wcstold(const wchar_t *__restrict, wchar_t **__restrict) { MLIBC_STUB_BODY; }
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long wcstol(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base) {
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return mlibc::stringToInteger<long, wchar_t>(nptr, endptr, base);
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}
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unsigned long wcstoul(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base) {
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return mlibc::stringToInteger<unsigned long, wchar_t>(nptr, endptr, base);
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}
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long long wcstoll(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base) {
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return mlibc::stringToInteger<long long, wchar_t>(nptr, endptr, base);
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}
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unsigned long long wcstoull(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base) {
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return mlibc::stringToInteger<unsigned long long, wchar_t>(nptr, endptr, base);
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}
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wchar_t *wcscpy(wchar_t *__restrict dest, const wchar_t *__restrict src) {
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wchar_t *a = dest;
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while((*dest++ = *src++));
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return a;
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}
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wchar_t *wcsncpy(wchar_t *__restrict dest, const wchar_t *__restrict src, size_t n) {
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wchar_t *a = dest;
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while(n && *src)
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n--, *dest++ = *src++;
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wmemset(dest, 0, n);
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return a;
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}
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wchar_t *wmemcpy(wchar_t *__restrict dest, const wchar_t *__restrict src, size_t n) {
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memcpy(dest, src, n * sizeof(wchar_t));
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return dest;
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}
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wchar_t *wmemmove(wchar_t *dest, const wchar_t *src, size_t n) {
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memmove(dest, src, n * sizeof(wchar_t));
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return dest;
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}
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wchar_t *wcscat(wchar_t *__restrict dest, const wchar_t *__restrict src) {
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wcscpy(dest + wcslen(dest), src);
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return dest;
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}
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wchar_t *wcsncat(wchar_t *__restrict, const wchar_t *__restrict, size_t) { MLIBC_STUB_BODY; }
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int wcscmp(const wchar_t *l, const wchar_t *r) {
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for(; *l == *r && *l && *r; l++, r++);
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return *l - *r;
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}
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int wcscoll(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
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int wcsncmp(const wchar_t *, const wchar_t *, size_t) { MLIBC_STUB_BODY; }
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int wcsxfrm(wchar_t *__restrict, const wchar_t *__restrict, size_t) { MLIBC_STUB_BODY; }
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int wmemcmp(const wchar_t *a, const wchar_t *b, size_t size) {
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for(size_t i = 0; i < size; i++) {
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auto a_byte = a[i];
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auto b_byte = b[i];
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if(a_byte < b_byte)
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return -1;
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if(a_byte > b_byte)
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return 1;
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}
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return 0;
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}
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wchar_t *wcschr(const wchar_t *s, wchar_t c) {
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if(!c)
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return (wchar_t *)s + wcslen(s);
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for(; *s && *s != c; s++);
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return *s ? (wchar_t *)s : nullptr;
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}
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size_t wcscspn(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
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wchar_t *wcspbrk(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
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wchar_t *wcsrchr(const wchar_t *s, wchar_t c) {
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const wchar_t *p;
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for(p = s + wcslen(s); p >= s && *p != c; p--);
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return p >= s ? (wchar_t *)p : nullptr;
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}
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size_t wcsspn(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
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wchar_t *wcsstr(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
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wchar_t *wcstok(wchar_t *__restrict, const wchar_t *__restrict, wchar_t **__restrict) { MLIBC_STUB_BODY; }
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wchar_t *wmemchr(const wchar_t *s, wchar_t c, size_t size) {
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auto s_bytes = s;
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for(size_t i = 0; i < size; i++)
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if(s_bytes[i] == c)
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return const_cast<wchar_t *>(s_bytes + i);
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return nullptr;
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}
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size_t wcslen(const wchar_t *s) {
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const wchar_t *a;
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for(a = s; *s; s++);
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return s-a;
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}
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wchar_t *wmemset(wchar_t *d, wchar_t c, size_t n) {
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wchar_t *ret = d;
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while(n--)
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*d++ = c;
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return ret;
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}
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char *strerror(int e) {
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const char *s;
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switch(e) {
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case EAGAIN: s = "Operation would block (EAGAIN)"; break;
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case EACCES: s = "Access denied (EACCESS)"; break;
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case EBADF: s = "Bad file descriptor (EBADF)"; break;
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case EEXIST: s = "File exists already (EEXIST)"; break;
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case EFAULT: s = "Access violation (EFAULT)"; break;
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case EINTR: s = "Operation interrupted (EINTR)"; break;
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case EINVAL: s = "Invalid argument (EINVAL)"; break;
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case EIO: s = "I/O error (EIO)"; break;
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case EISDIR: s = "Resource is directory (EISDIR)"; break;
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case ENOENT: s = "No such file or directory (ENOENT)"; break;
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case ENOMEM: s = "Out of memory (ENOMEM)"; break;
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case ENOTDIR: s = "Expected directory instead of file (ENOTDIR)"; break;
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case ENOSYS: s = "Operation not implemented (ENOSYS)"; break;
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case EPERM: s = "Operation not permitted (EPERM)"; break;
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case EPIPE: s = "Broken pipe (EPIPE)"; break;
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case ESPIPE: s = "Seek not possible (ESPIPE)"; break;
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case ENXIO: s = "No such device or address (ENXIO)"; break;
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case ENOEXEC: s = "Exec format error (ENOEXEC)"; break;
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case ENOSPC: s = "No space left on device (ENOSPC)"; break;
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case ENOTSOCK: s = "Socket operation on non-socket (ENOTSOCK)"; break;
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case ENOTCONN: s = "Transport endpoint is not connected (ENOTCONN)"; break;
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case EDOM: s = "Numerical argument out of domain (EDOM)"; break;
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case EILSEQ: s = "Invalid or incomplete multibyte or wide character (EILSEQ)"; break;
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case ERANGE: s = "Numerical result out of range (ERANGE)"; break;
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case E2BIG: s = "Argument list too long (E2BIG)"; break;
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case EADDRINUSE: s = "Address already in use (EADDRINUSE)"; break;
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case EADDRNOTAVAIL: s = "Cannot assign requested address (EADDRNOTAVAIL)"; break;
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case EAFNOSUPPORT: s = "Address family not supported by protocol (EAFNOSUPPORT)"; break;
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case EALREADY: s = "Operation already in progress (EALREADY)"; break;
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case EBADMSG: s = "Bad message (EBADMSG)"; break;
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case EBUSY: s = "Device or resource busy (EBUSY)"; break;
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case ECANCELED: s = "Operation canceled (ECANCELED)"; break;
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case ECHILD: s = "No child processes (ECHILD)"; break;
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case ECONNABORTED: s = "Software caused connection abort (ECONNABORTED)"; break;
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case ECONNREFUSED: s = "Connection refused (ECONNREFUSED)"; break;
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case ECONNRESET: s = "Connection reset by peer (ECONNRESET)"; break;
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case EDEADLK: s = "Resource deadlock avoided (EDEADLK)"; break;
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case EDESTADDRREQ: s = "Destination address required (EDESTADDRREQ)"; break;
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case EDQUOT: s = "Disk quota exceeded (EDQUOT)"; break;
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case EFBIG: s = "File too large (EFBIG)"; break;
|
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case EHOSTUNREACH: s = "No route to host (EHOSTUNREACH)"; break;
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case EIDRM: s = "Identifier removed (EIDRM)"; break;
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case EINPROGRESS: s = "Operation now in progress (EINPROGRESS)"; break;
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case EISCONN: s = "Transport endpoint is already connected (EISCONN)"; break;
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case ELOOP: s = "Too many levels of symbolic links (ELOOP)"; break;
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case EMFILE: s = "Too many open files (EMFILE)"; break;
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case EMLINK: s = "Too many links (EMLINK)"; break;
|
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case EMSGSIZE: s = "Message too long (EMSGSIZE)"; break;
|
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case EMULTIHOP: s = "Multihop attempted (EMULTIHOP)"; break;
|
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case ENAMETOOLONG: s = "File name too long (ENAMETOOLONG)"; break;
|
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case ENETDOWN: s = "Network is down (ENETDOWN)"; break;
|
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case ENETRESET: s = "Network dropped connection on reset (ENETRESET)"; break;
|
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case ENETUNREACH: s = "Network is unreachable (ENETUNREACH)"; break;
|
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case ENFILE: s = "Too many open files in system (ENFILE)"; break;
|
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case ENOBUFS: s = "No buffer space available (ENOBUFS)"; break;
|
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case ENODEV: s = "No such device (ENODEV)"; break;
|
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case ENOLCK: s = "No locks available (ENOLCK)"; break;
|
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case ENOLINK: s = "Link has been severed (ENOLINK)"; break;
|
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case ENOMSG: s = "No message of desired type (ENOMSG)"; break;
|
||||
case ENOPROTOOPT: s = "Protocol not available (ENOPROTOOPT)"; break;
|
||||
case ENOTEMPTY: s = "Directory not empty (ENOTEMPTY)"; break;
|
||||
case ENOTRECOVERABLE: s = "Sate not recoverable (ENOTRECOVERABLE)"; break;
|
||||
case ENOTSUP: s = "Operation not supported (ENOTSUP)"; break;
|
||||
case ENOTTY: s = "Inappropriate ioctl for device (ENOTTY)"; break;
|
||||
case EOVERFLOW: s = "Value too large for defined datatype (EOVERFLOW)"; break;
|
||||
#if EOPNOTSUPP != ENOTSUP
|
||||
/* these are aliases on the mlibc abi */
|
||||
case EOPNOTSUPP: s = "Operation not supported (EOPNOTSUP)"; break;
|
||||
#endif
|
||||
case EOWNERDEAD: s = "Owner died (EOWNERDEAD)"; break;
|
||||
case EPROTO: s = "Protocol error (EPROTO)"; break;
|
||||
case EPROTONOSUPPORT: s = "Protocol not supported (EPROTONOSUPPORT)"; break;
|
||||
case EPROTOTYPE: s = "Protocol wrong type for socket (EPROTOTYPE)"; break;
|
||||
case EROFS: s = "Read-only file system (EROFS)"; break;
|
||||
case ESRCH: s = "No such process (ESRCH)"; break;
|
||||
case ESTALE: s = "Stale file handle (ESTALE)"; break;
|
||||
case ETIMEDOUT: s = "Connection timed out (ETIMEDOUT)"; break;
|
||||
case ETXTBSY: s = "Text file busy (ETXTBSY)"; break;
|
||||
case EXDEV: s = "Invalid cross-device link (EXDEV)"; break;
|
||||
case ENODATA: s = "No data available (ENODATA)"; break;
|
||||
case ETIME: s = "Timer expired (ETIME)"; break;
|
||||
case ENOKEY: s = "Required key not available (ENOKEY)"; break;
|
||||
case ESHUTDOWN: s = "Cannot send after transport endpoint shutdown (ESHUTDOWN)"; break;
|
||||
case EHOSTDOWN: s = "Host is down (EHOSTDOWN)"; break;
|
||||
case EBADFD: s = "File descriptor in bad state (EBADFD)"; break;
|
||||
case ENOMEDIUM: s = "No medium found (ENOMEDIUM)"; break;
|
||||
case ENOTBLK: s = "Block device required (ENOTBLK)"; break;
|
||||
case ENONET: s = "Machine is not on the network (ENONET)"; break;
|
||||
case EPFNOSUPPORT: s = "Protocol family not supported (EPFNOSUPPORT)"; break;
|
||||
case ESOCKTNOSUPPORT: s = "Socket type not supported (ESOCKTNOSUPPORT)"; break;
|
||||
case ESTRPIPE: s = "Streams pipe error (ESTRPIPE)"; break;
|
||||
case EREMOTEIO: s = "Remote I/O error (EREMOTEIO)"; break;
|
||||
case ERFKILL: s = "Operation not possible due to RF-kill (ERFKILL)"; break;
|
||||
case EBADR: s = "Invalid request descriptor (EBADR)"; break;
|
||||
case EUNATCH: s = "Protocol driver not attached (EUNATCH)"; break;
|
||||
case EMEDIUMTYPE: s = "Wrong medium type (EMEDIUMTYPE)"; break;
|
||||
case EREMOTE: s = "Object is remote (EREMOTE)"; break;
|
||||
case EKEYREJECTED: s = "Key was rejected by service (EKEYREJECTED)"; break;
|
||||
case EUCLEAN: s = "Structure needs cleaning (EUCLEAN)"; break;
|
||||
case EBADSLT: s = "Invalid slot (EBADSLT)"; break;
|
||||
case ENOANO: s = "No anode (ENOANO)"; break;
|
||||
case ENOCSI: s = "No CSI structure available (ENOCSI)"; break;
|
||||
case ENOSTR: s = "Device not a stream (ENOSTR)"; break;
|
||||
case ETOOMANYREFS: s = "Too many references: cannot splice (ETOOMANYREFS)"; break;
|
||||
case ENOPKG: s = "Package not installed (ENOPKG)"; break;
|
||||
case EKEYREVOKED: s = "Key has been revoked (EKEYREVOKED)"; break;
|
||||
case EXFULL: s = "Exchange full (EXFULL)"; break;
|
||||
case ELNRNG: s = "Link number out of range (ELNRNG)"; break;
|
||||
case ENOTUNIQ: s = "Name not unique on network (ENOTUNIQ)"; break;
|
||||
case ERESTART: s = "Interrupted system call should be restarted (ERESTART)"; break;
|
||||
case EUSERS: s = "Too many users (EUSERS)"; break;
|
||||
|
||||
#ifdef EIEIO
|
||||
case EIEIO: s = "Computer bought the farm; OS internal error (EIEIO)"; break;
|
||||
#endif
|
||||
|
||||
default:
|
||||
s = "Unknown error code (?)";
|
||||
}
|
||||
return const_cast<char *>(s);
|
||||
}
|
||||
// strlen() is defined in options/internals.
|
||||
|
||||
extern "C" char *__gnu_strerror_r(int e, char *buffer, size_t bufsz) {
|
||||
auto s = strerror(e);
|
||||
strncpy(buffer, s, bufsz);
|
||||
return buffer;
|
||||
}
|
||||
|
||||
// POSIX extensions.
|
||||
|
||||
int strerror_r(int e, char *buffer, size_t bufsz) {
|
||||
auto s = strerror(e);
|
||||
strncpy(buffer, s, bufsz);
|
||||
// Note that strerror_r does not set errno on error!
|
||||
if(strlen(s) >= bufsz)
|
||||
return ERANGE;
|
||||
return 0;
|
||||
}
|
||||
|
||||
void *mempcpy(void *dest, const void *src, size_t len) {
|
||||
return (char *)memcpy(dest, src, len) + len;
|
||||
}
|
||||
|
||||
// GNU extensions.
|
||||
// Taken from musl.
|
||||
int strverscmp(const char *l0, const char *r0) {
|
||||
const unsigned char *l = (const unsigned char *)l0;
|
||||
const unsigned char *r = (const unsigned char *)r0;
|
||||
size_t i, dp, j;
|
||||
int z = 1;
|
||||
|
||||
/* Find maximal matching prefix and track its maximal digit
|
||||
* suffix and whether those digits are all zeros. */
|
||||
for(dp = i = 0; l[i] == r[i]; i++) {
|
||||
int c = l[i];
|
||||
if(!c)
|
||||
return 0;
|
||||
if(!isdigit(c))
|
||||
dp = i + 1, z = 1;
|
||||
else if(c != '0')
|
||||
z = 0;
|
||||
}
|
||||
|
||||
if(l[dp] != '0' && r[dp] != '0') {
|
||||
/* If we're not looking at a digit sequence that began
|
||||
* with a zero, longest digit string is greater. */
|
||||
for(j = i; isdigit(l[j]); j++) {
|
||||
if(!isdigit(r[j]))
|
||||
return 1;
|
||||
}
|
||||
if(isdigit(r[j]))
|
||||
return -1;
|
||||
} else if(z && dp < i && (isdigit(l[i]) || isdigit(r[i]))) {
|
||||
/* Otherwise, if common prefix of digit sequence is
|
||||
* all zeros, digits order less than non-digits. */
|
||||
return (unsigned char)(l[i] - '0') - (unsigned char)(r[i] - '0');
|
||||
}
|
||||
|
||||
return l[i] - r[i];
|
||||
}
|
||||
|
||||
void *memmem(const void *hs, size_t haystackLen, const void *nd, size_t needleLen) {
|
||||
const char *haystack = static_cast<const char *>(hs);
|
||||
const char *needle = static_cast<const char *>(nd);
|
||||
|
||||
for (size_t i = 0; i < haystackLen; i++) {
|
||||
bool found = true;
|
||||
|
||||
for (size_t j = 0; j < needleLen; j++) {
|
||||
if (i + j >= haystackLen || haystack[i + j] != needle[j]) {
|
||||
found = false;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if(found)
|
||||
return const_cast<char *>(&haystack[i]);
|
||||
}
|
||||
|
||||
return nullptr;
|
||||
}
|
||||
Reference in New Issue
Block a user