feat: Integrate LVGL v8.3 desktop GUI, PS/2 mouse driver, live system monitor, and make gui target

lib/libc/include/inttypes.h

@@ -0,0 +1,12 @@
+#pragma once
+#include <stdint.h>
+
+#define PRId64 "lld"
+#define PRIu64 "llu"
+#define PRIx64 "llx"
+#define PRIX64 "llX"
+
+#define PRId32 "d"
+#define PRIu32 "u"
+#define PRIx32 "x"
+#define PRIX32 "X"

lib/libc/include/stddef.h

@@ -6,8 +6,12 @@ typedef __INTPTR_TYPE__ intptr_t;
 typedef __UINTPTR_TYPE__ uintptr_t;
 
 #ifndef NULL
+#ifdef __cplusplus
+#define NULL 0
+#else
 #define NULL ((void*)0)
 #endif
+#endif
 
 #ifndef offsetof
 #define offsetof(type, member) __builtin_offsetof(type, member)

lib/libc/include/stdint.h

@@ -13,6 +13,19 @@ typedef __UINT64_TYPE__ uint64_t;
 typedef __INTPTR_TYPE__  intptr_t;
 typedef __UINTPTR_TYPE__ uintptr_t;
 
+typedef __INTMAX_TYPE__  intmax_t;
+typedef __UINTMAX_TYPE__ uintmax_t;
+
+typedef int32_t  int_fast32_t;
+typedef uint32_t uint_fast32_t;
+typedef int16_t  int_fast16_t;
+typedef uint16_t uint_fast16_t;
+
+#define INT8_MIN   (-128)
+#define INT16_MIN  (-32768)
+#define INT32_MIN  (-2147483647 - 1)
+#define INT64_MIN  (-9223372036854775807LL - 1)
+
 #define INT8_MAX   127
 #define INT16_MAX  32767
 #define INT32_MAX  2147483647
@@ -22,3 +35,4 @@ typedef __UINTPTR_TYPE__ uintptr_t;
 #define UINT16_MAX 65535
 #define UINT32_MAX 4294967295U
 #define UINT64_MAX 18446744073709551615ULL
+#define SIZE_MAX   ((size_t)-1)

lib/libc/include/stdio.h

@@ -11,6 +11,7 @@ int puts(const char *s);
 int putchar(int c);
 int printf(const char *format, ...);
 int sprintf(char *str, const char *format, ...);
+int snprintf(char *str, size_t size, const char *format, ...);
 
 #ifdef __cplusplus
 }

lib/libc/include/stdlib.h

@@ -15,6 +15,8 @@ void *realloc(void *ptr, size_t size);
 void abort(void);
 void exit(int status);
 int  atoi(const char *nptr);
+static inline int abs(int x) { return x < 0 ? -x : x; }
+static inline long labs(long x) { return x < 0 ? -x : x; }
 
 #ifdef __cplusplus
 }

lib/libc/include/string.h

@@ -17,6 +17,7 @@ int    strcmp(const char *s1, const char *s2);
 int    strncmp(const char *s1, const char *s2, size_t n);
 char  *strcpy(char *dest, const char *src);
 char  *strncpy(char *dest, const char *src, size_t n);
+char  *strcat(char *dest, const char *src);
 char  *strchr(const char *s, int c);
 char  *strstr(const char *haystack, const char *needle);
 

lib/libc/src/string.c

@@ -91,6 +91,15 @@ char *strncpy(char *dest, const char *src, size_t n) {
     return ret;
 }
 
+char *strcat(char *dest, const char *src) {
+    char *ret = dest;
+    while (*dest) {
+        dest++;
+    }
+    while ((*dest++ = *src++));
+    return ret;
+}
+
 char *strchr(const char *s, int c) {
     char ch = (char)c;
     while (*s) {

lib/libc/src/syscalls.c

@@ -133,6 +133,14 @@ int sprintf(char *buf, const char *fmt, ...) {
     return ret;
 }
 
+int snprintf(char *buf, size_t size, const char *fmt, ...) {
+    __builtin_va_list args;
+    __builtin_va_start(args, fmt);
+    int ret = vsnprintf(buf, size, fmt, args);
+    __builtin_va_end(args);
+    return ret;
+}
+
 int printf(const char *fmt, ...) {
     char buf[2048];
     __builtin_va_list args;