Meta: Move kernel and userland to their own folders.

This is to allow both the kernel and the userland to share certain
header files and to make the folder structure a bit more clear.

8 files changed, 166 insertions, 0 deletions

diff --git a/kernel/libc/include/assert.h b/kernel/libc/include/assert.h
new file mode 100644
index 0000000..90a0be4
--- /dev/null
+++ b/kernel/libc/include/assert.h
@@ -0,0 +1,19 @@
+#include <log.h>
+#include <stdio.h>
+
+#define assert(expr)                                                           \
+  {                                                                            \
+    if (!(expr))                                                               \
+      aFailed(__FILE__, __LINE__);                                             \
+  }
+
+#define ASSERT_BUT_FIXME_PROPOGATE(expr)                                       \
+  {                                                                            \
+    if (!(expr))                                                               \
+      kprintf("Performing assert that should have been a propogated error.");  \
+    assert(expr);                                                              \
+  }
+
+void aFailed(char *f, int l);
+#define ASSERT_NOT_REACHED                                                     \
+  { assert(0) }
diff --git a/kernel/libc/include/errno.h b/kernel/libc/include/errno.h
new file mode 100644
index 0000000..1ad1004
--- /dev/null
+++ b/kernel/libc/include/errno.h
@@ -0,0 +1,85 @@
+#ifndef ERRNO_H
+#define ERRNO_H
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
+#define E2BIG 1         // Argument list too long.
+#define EACCES 2        // Permission denied.
+#define EADDRINUSE 3    // Address in use.
+#define EADDRNOTAVAIL 4 // Address not available.
+#define EAFNOSUPPORT 5  // Address family not supported.
+#define EAGAIN 6        // Resource unavailable, try again.
+#define EALREADY 7      // Connection already in progress.
+#define EBADF 8         // Bad file descriptor.
+#define EBADMSG 9       // Bad message.
+#define EBUSY 10        // Device or resource busy.
+#define ECANCELED 11    // Operation canceled.
+#define ECHILD 12       // No child processes.
+#define ECONNABORTED 13 // Connection aborted.
+#define ECONNREFUSED 14 // Connection refused.
+#define ECONNRESET 15   // Connection reset.
+#define EDEADLK 16      // Resource deadlock would occur.
+#define EDESTADDRREQ 17 // Destination address required.
+#define EDOM 18         // Mathematics argument out of domain of function.
+#define EDQUOT 19       // Reserved.
+#define EEXIST 20       // File exists.
+#define EFAULT 21       // Bad address.
+#define EFBIG 22        // File too large.
+#define EHOSTUNREACH 23 // Host is unreachable.
+#define EIDRM 24        // Identifier removed.
+#define EILSEQ 25       // Illegal byte sequence.
+#define EINPROGRESS 26  // Operation in progress.
+#define EINTR 27        // Interrupted function.
+#define EINVAL 28       // Invalid argument.
+#define EIO 29          // I/O error.
+#define EISCONN 30      // Socket is connected.
+#define EISDIR 31       // Is a directory.
+#define ELOOP 32        // Too many levels of symbolic links.
+#define EMFILE 33       // File descriptor value too large.
+#define EMLINK 34       // Too many links.
+#define EMSGSIZE 35     // Message too large.
+#define EMULTIHOP 36    // Reserved.
+#define ENAMETOOLONG 37 // Filename too long.
+#define ENETDOWN 38     // Network is down.
+#define ENETRESET 39    // Connection aborted by network.
+#define ENETUNREACH 40  // Network unreachable.
+#define ENFILE 41       // Too many files open in system.
+#define ENOBUFS 42      // No buffer space available.
+#define ENODATA 43     // No message is available on the STREAM head read queue.
+#define ENODEV 44      // No such device.
+#define ENOENT 45      // No such file or directory.
+#define ENOEXEC 46     // Executable file format error.
+#define ENOLCK 47      // No locks available.
+#define ENOLINK 48     // Reserved.
+#define ENOMEM 49      // Not enough space.
+#define ENOMSG 50      // No message of the desired type.
+#define ENOPROTOOPT 51 // Protocol not available.
+#define ENOSPC 52      // No space left on device.
+#define ENOSR 53       // No STREAM resources.
+#define ENOSTR 54      // Not a STREAM.
+#define ENOSYS 55      // Functionality not supported.
+#define ENOTCONN 56    // The socket is not connected.
+#define ENOTDIR 57     // Not a directory or a symbolic link to a directory.
+#define ENOTEMPTY 58   // Directory not empty.
+#define ENOTRECOVERABLE 59 // State not recoverable.
+#define ENOTSOCK 60        // Not a socket.
+#define ENOTSUP 61         // Not supported (may be the same value as.
+#define ENOTTY 62          // Inappropriate I/O control operation.
+#define ENXIO 63           // No such device or address.
+#define EOPNOTSUPP ENOTSUP // Operation not supported on socket.
+#define EOVERFLOW 65       // Value too large to be stored in data type.
+#define EOWNERDEAD 66      // Previous owner died.
+#define EPERM 67           // Operation not permitted.
+#define EPIPE 68           // Broken pipe.
+#define EPROTO 69          // Protocol error.
+#define EPROTONOSUPPORT 70 // Protocol not supported.
+#define EPROTOTYPE 71      // Protocol wrong type for socket.
+#define ERANGE 72          // Result too large.
+#define EROFS 73           // Read-only file system.
+#define ESPIPE 74          // Invalid seek.
+#define ESRCH 75           // No such process.
+#define ESTALE 76          // Reserved.
+#define ETIME 77           // Stream ioctl() timeout.
+#define ETIMEDOUT 78       // Connection timed out.
+#define ETXTBSY 79         // Text file busy.
+#define EWOULDBLOCK EAGAIN // Operation would block.
+#define EXDEV 81           // Cross-device link.
+#endif
diff --git a/kernel/libc/include/limits.h b/kernel/libc/include/limits.h
new file mode 100644
index 0000000..05022ec
--- /dev/null
+++ b/kernel/libc/include/limits.h
@@ -0,0 +1 @@
+#define PATH_MAX 256
diff --git a/kernel/libc/include/stdio.h b/kernel/libc/include/stdio.h
new file mode 100644
index 0000000..f2bbb32
--- /dev/null
+++ b/kernel/libc/include/stdio.h
@@ -0,0 +1,9 @@
+#ifndef STDIO_H
+#define STDIO_H
+
+void putc(const char c);
+int puts(char *str);
+void delete_characther(void);
+int kprintf(const char *format, ...);
+
+#endif
diff --git a/kernel/libc/include/stdlib.h b/kernel/libc/include/stdlib.h
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/kernel/libc/include/stdlib.h
diff --git a/kernel/libc/include/string.h b/kernel/libc/include/string.h
new file mode 100644
index 0000000..7cee4b2
--- /dev/null
+++ b/kernel/libc/include/string.h
@@ -0,0 +1,19 @@
+#ifndef STRING_H
+#define STRING_H
+#include <stddef.h>
+#include <stdint.h>
+
+unsigned long strlen(const char *s);
+void *memcpy(void *dest, const void *src, uint32_t n);
+void *memset(void *dst, const unsigned char c, uint32_t n);
+int memcmp(const void *s1, const void *s2, uint32_t n);
+char *strcpy(char *d, const char *s);
+int strcmp(const char *s1, const char *s2);
+int isequal(const char *s1, const char *s2);
+int isequal_n(const char *s1, const char *s2, uint32_t n);
+char *copy_and_allocate_string(const char *s);
+char *copy_and_allocate_user_string(const char *s);
+char *strncpy(char *dest, const char *src, size_t n);
+size_t strlcpy(char *dst, const char *src, size_t dsize);
+char *strcat(char *s1, const char *s2);
+#endif
diff --git a/kernel/libc/include/time.h b/kernel/libc/include/time.h
new file mode 100644
index 0000000..4e356d1
--- /dev/null
+++ b/kernel/libc/include/time.h
@@ -0,0 +1,6 @@
+#include <types.h>
+
+struct timespec {
+  time_t tv_sec; // Seconds.
+  long tv_nsec;  // Nanoseconds.
+};
diff --git a/kernel/libc/include/types.h b/kernel/libc/include/types.h
new file mode 100644
index 0000000..ffcf281
--- /dev/null
+++ b/kernel/libc/include/types.h
@@ -0,0 +1,27 @@
+#ifndef TYPES_H
+#define TYPES_H
+typedef unsigned int ino_t;
+
+typedef int mode_t;
+
+typedef int nlink_t;
+typedef int uid_t;
+typedef int gid_t;
+typedef int id_t;
+
+typedef int blkcnt_t;
+typedef int off_t;
+
+typedef int dev_t;
+typedef unsigned int fsblkcnt_t;
+typedef unsigned int fsfilcnt_t;
+typedef unsigned int ino_t;
+//typedef unsigned int size_t;
+
+typedef int blksize_t;
+typedef int pid_t;
+typedef int ssize_t;
+
+//typedef int clock_t;
+typedef int time_t;
+#endif