Some string functions (untested)

code/string.c

@@ -1,8 +1,17 @@
 #include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.h>
+
+// TODO: rewrite memmove to not allocate anything
+
+typedef unsigned char byte;
 
 void *memcpy(void *restrict s1, const void *restrict s2, size_t n) {
-    const unsigned char *restrict c2 = s2;
-    unsigned char *restrict c1 = s1;
+    const byte *restrict c2 = s2;
+    byte *restrict c1 = s1;
 
     while (n--) {
         *c1++ = *c2++;
@@ -10,35 +19,173 @@ void *memcpy(void *restrict s1, const void *restrict s2, size_t n) {
     return s1;
 }
 
-int memcmp(const void *s1, const void *s2, size_t n) {
-    const unsigned char *u1 = s1;
-    const unsigned char *u2 = s2;
-
-    for (; n--; u1++, u2++) {
-        if (*u1 != *u2) return *u1 - *u2;
-    }
-
-    return 0;
+void *memmove(void *s1, const void *s2, size_t n)
+{
+    byte *u1 = s1;
+    byte const *u2 = s2;
+    void *buffer = malloc(n);
+    strcpy(buffer, s2);
+    strcpy(s1, buffer);
+    free(buffer);
+    return s1;
 }
 
 void *memset(void *s, int c, size_t n) {
-    unsigned char *restrict buf = s;
+    byte *restrict buf = s;
     while (n--) {
         *buf++ = c;
     }
     return s;
 }
 
-int strcmp(const char *s1, const char *s2) {
-    while (*s1 != 0 && *s2 != 0) {
-        if (*s1 != *s2) break;
+char *strcpy(char *restrict s1, const char *restrict s2)
+{
+    while(*s2 != 0) {
+        *s1++ = *s2++;
     }
+    *s1 = 0;
+    return s1;
+}
 
-    if(*s1 > *s2) return 1;
-    if(*s1 < *s2) return -1;
+char *strncpy(char *restrict s1, const char *restrict s2, size_t n)
+{
+    while(n-->0 && *s2 != 0) {
+        *s1++ = *s2++;
+    }
+    while(n-->0) {
+        *s1++ = 0;
+    }
+    return s1;
+}
+
+
+char *strncat(char *restrict s1, const char *restrict s2, size_t n)
+{
+    int start = strlen(s1);
+    for(int i = 0; i != n && *s2 != 0; ++i) {
+        s1[start+i] = s2[i];
+    }
+    s1[start+n] = 0;
+    return s1;
+}
+
+
+int memcmp(const void *s1, const void *s2, size_t n) {
+    const byte *u1 = s1;
+    const byte *u2 = s2;
+    for (; n--; u1++, u2++) {
+        if (*u1 != *u2) return *u1 - *u2;
+    }
     return 0;
 }
 
+int strcmp(const char *s1, const char *s2) {
+    int diff;
+    do {
+        diff = *s1 - *s2;
+    } while(diff != 0 && *s1 != 0 && *s2 != 0);
+    return diff;
+}
+
+int strncmp(const char *s1, const char *s2, size_t n)
+{
+    int diff;
+    int i = 0;
+    if(n != 0) do {
+        diff = *s1 - *s2;
+    } while(++i < n && diff != 0 && *s1 != 0 && *s2 != 0);
+    return diff;
+}
+
+// fuck locales
+int strcoll(const char *s1, const char *s2)
+{
+    return strcmp(s1, s2);
+}
+
+// fuck bad implementation of strcoll
+size_t strxfrm(char *restrict s1, const char *restrict s2, size_t n)
+{
+    size_t len = strlen(s2);
+    if(s1 != NULL && n != 0) {
+        for(int i = 0; i != n; ++i) {
+            *s1 = *s2;
+        }
+    }
+    return len;
+}
+
+void *memchr(const void *ptr, int c, size_t n)
+{
+    const byte *s = ptr;
+    int i = 0;
+    for(; i != n && *s != c; ++i, ++s) {
+        ++s;
+    }
+    if(i == n) return NULL;
+    return (void *)s; // fuck clang
+}
+
+char *strchr(const char *s, int c)
+{
+    while(*s && *s != c) ++s;
+    if(*s != c) return NULL;
+    return (void *)s; // fuck clang
+}
+
+size_t strcspn(const char *s1, const char *s2)
+{
+    size_t i = 0;
+    while(*s1) {
+        if(strchr(s2, *s1) != NULL) {
+            break;
+        }
+        ++s1;
+        ++i;
+    }
+    return i;
+}
+
+char *strpbrk(const char *s1, const char *s2)
+{
+    while(*s1) {
+        if(strchr(s2, *s1) == NULL) {
+            break;
+        }
+        ++s1;
+    }
+    return (char *)s1;
+}
+
+char *strstr(const char *s1, const char *s2)
+{
+    if(!*s2) return (char *)s1;
+    size_t len = strlen(s2);
+    while(*s1 != 0) {
+        bool match = true;
+        for(size_t i = 0; i != len; ++i) {
+            if(!*s1 || s1[i] != s2[i]) {
+                match = false;
+                break;
+            }
+        }
+        ++s1;
+        if(match) return (char *)s1;
+    }
+    return NULL;
+}
+
+char *strerror(int errnum)
+{
+    switch(errnum) {
+        case 0:      return "No errors";
+        case EDOM:   return "Value is out of domain of the function";
+        case EILSEQ: return "Illegal byte sequence";
+        case ERANGE: return "Value is out of range";
+    }
+    return "Unkown error";
+}
+
 size_t strlen(const char *s) {
     size_t i = 0;
     while (s[i]) {
@@ -47,7 +194,8 @@ size_t strlen(const char *s) {
     return i;
 }
 
-// __STDC_WANT_LIB_EXT1__
+#if __STDC_WANT_LIB_EXT1__ == 1
+
 size_t strnlen_s(const char *s, size_t maxsize) {
     if (s == NULL) return 0;
 
@@ -57,3 +205,5 @@ size_t strnlen_s(const char *s, size_t maxsize) {
     }
     return i;
 }
+
+#endif

inc/locale.h

@@ -1,9 +1,15 @@
-#include "_platform.h"
+
+#pragma once
+
+#define _COL_IGNORE_SPACE  0x1
+#define _COL_IGNORE_SYMBOL 0x2
 
 struct lconv {
+	// LC_NUMERIC
 	char *decimal_point; // "."
 	char *thousands_sep; // ""
 	char *grouping; // ""
+	// LC_MONETARY
 	char *mon_decimal_point; // ""
 	char *mon_thousands_sep; // ""
 	char *mon_grouping; // ""

inc/signal.h

@@ -3,9 +3,9 @@
 typedef int sig_atomic_t;
 
 // TODO: implement this
-#define SIG_DFL (-1)
-#define SIG_ERR (-1)
-#define SIG_IGN (-1)
+#define SIG_DFL 0
+#define SIG_ERR 1
+#define SIG_IGN 2
 
 // not sure why but windows picked these, we can change it later
 #define SIGINT          2

inc/stdlib.h

@@ -1,7 +1,7 @@
 #pragma once
 
 #if !defined(NULL)
-#define NULL ((void *)0)
+    #define NULL ((void *)0)
 #endif
 
 // typedef struct div_t {

inc/string.h

@@ -1,6 +1,11 @@
-#include "_platform.h"
 
-int _wcsicmp(const wchar_t *string1, const wchar_t *string2);
+#pragma once
+
+#if !defined(NULL)
+    #define NULL ((void *)0)
+#endif
+
+// int _wcsicmp(const wchar_t *string1, const wchar_t *string2);
 
 void *memcpy(void * restrict s1, const void * restrict s2, size_t n);
 void *memmove(void *s1, const void *s2, size_t n);
@@ -25,7 +30,7 @@ void *memset(void *s, int c, size_t n);
 char *strerror(int errnum);
 size_t strlen(const char *s);
 
-#if __STDC_WANT_LIB_EXT1__
+#if __STDC_WANT_LIB_EXT1__ == 1
 errno_t memcpy_s(void * restrict s1, rsize_t s1max, const void * restrict s2, rsize_t n);
 errno_t memmove_s(void *s1, rsize_t s1max, const void *s2, rsize_t n);
 errno_t strcpy_s(char * restrict s1, rsize_t s1max, const char * restrict s2);

inc/threads.h

@@ -1,4 +1,5 @@
-#include "_platform.h"
+
+#include <time.h>
 
 #define thread_local _Thread_local
 #define ONCE_FLAG_INIT 1

inc/time.h

@@ -1,4 +1,9 @@
-#include "_platform.h"
+
+#pragma once
+
+#if !defined(NULL)
+    #define NULL ((void *)0)
+#endif
 
 // The number of clock ticks per second
 #define CLOCKS_PER_SEC  ((clock_t)1000)

platform/win32/env.c

@@ -0,0 +1,2 @@
+
+#include <stdlib.h>