add misc utility headers

include/gay/errno.h

@@ -0,0 +1,152 @@
+/* See the end of this file for copyright and license terms. */
+
+#pragma once
+
+#define EPERM		1
+#define ENOENT		2
+#define ESRCH		3
+#define EINTR		4
+#define EIO		5
+#define ENXIO		6
+#define E2BIG		7
+#define ENOEXEC		8
+#define EBADF		9
+#define ECHILD		10
+#define EAGAIN		11
+#define ENOMEM		12
+#define EACCES		13
+#define EFAULT		14
+#define ENOTBLK		15
+#define EBUSY		16
+#define EEXIST		17
+#define EXDEV		18
+#define ENODEV		19
+#define ENOTDIR		20
+#define EISDIR		21
+#define EINVAL		22
+#define ENFILE		23
+#define EMFILE		24
+#define ENOTTY		25
+#define ETXTBSY		26
+#define EFBIG		27
+#define ENOSPC		28
+#define ESPIPE		29
+#define EROFS		30
+#define EMLINK		31
+#define EPIPE		32
+#define EDOM		33
+#define ERANGE		34
+#define EDEADLK		35
+#define ENAMETOOLONG	36
+#define ENOLCK		37
+#define ENOSYS		38
+#define ENOTEMPTY	39
+#define ELOOP		40
+#define EWOULDBLOCK	11
+#define ENOMSG		42
+#define EIDRM		43
+#define ECHRNG		44
+#define EL2NSYNC	45
+#define EL3HLT		46
+#define EL3RST		47
+#define ELNRNG		48
+#define EUNATCH		49
+#define ENOCSI		50
+#define EL2HLT		51
+#define EBADE		52
+#define EBADR		53
+#define EXFULL		54
+#define ENOANO		55
+#define EBADRQC		56
+#define EBADSLT		57
+#define EDEADLOCK	35
+#define EBFONT		59
+#define ENOSTR		60
+#define ENODATA		61
+#define ETIME		62
+#define ENOSR		63
+#define ENONET		64
+#define ENOPKG		65
+#define EREMOTE		66
+#define ENOLINK		67
+#define EADV		68
+#define ESRMNT		69
+#define ECOMM		70
+#define EPROTO		71
+#define EMULTIHOP	72
+#define EDOTDOT		73
+#define EBADMSG		74
+#define EOVERFLOW	75
+#define ENOTUNIQ	76
+#define EBADFD		77
+#define EREMCHG		78
+#define ELIBACC		79
+#define ELIBBAD		80
+#define ELIBSCN		81
+#define ELIBMAX		82
+#define ELIBEXEC	83
+#define EILSEQ		84
+#define ERESTART	85
+#define ESTRPIPE	86
+#define EUSERS		87
+#define ENOTSOCK	88
+#define EDESTADDRREQ	89
+#define EMSGSIZE	90
+#define EPROTOTYPE	91
+#define ENOPROTOOPT	92
+#define EPROTONOSUPPORT	93
+#define ESOCKTNOSUPPORT	94
+#define EOPNOTSUPP	95
+#define ENOTSUP		95
+#define EPFNOSUPPORT	96
+#define EAFNOSUPPORT	97
+#define EADDRINUSE	98
+#define EADDRNOTAVAIL	99
+#define ENETDOWN	100
+#define ENETUNREACH	101
+#define ENETRESET	102
+#define ECONNABORTED	103
+#define ECONNRESET	104
+#define ENOBUFS		105
+#define EISCONN		106
+#define ENOTCONN	107
+#define ESHUTDOWN	108
+#define ETOOMANYREFS	109
+#define ETIMEDOUT	110
+#define ECONNREFUSED	111
+#define EHOSTDOWN	112
+#define EHOSTUNREACH	113
+#define EALREADY	114
+#define EINPROGRESS	115
+#define ESTALE		116
+#define EUCLEAN		117
+#define ENOTNAM		118
+#define ENAVAIL		119
+#define EISNAM		120
+#define EREMOTEIO	121
+#define EDQUOT		122
+#define ENOMEDIUM	123
+#define EMEDIUMTYPE	124
+#define ECANCELED	125
+#define ENOKEY		126
+#define EKEYEXPIRED	127
+#define EKEYREVOKED	128
+#define EKEYREJECTED	129
+#define EOWNERDEAD	130
+#define ENOTRECOVERABLE	131
+#define ERFKILL		132
+#define EHWPOISON	133
+
+/*
+ * This file is part of GayBSD.
+ * Copyright (c) 2021 fef <owo@fef.moe>.
+ *
+ * GayBSD is nonviolent software: you may only use, redistribute, and/or
+ * modify it under the terms of the Cooperative Nonviolent Public License
+ * (CNPL) as found in the LICENSE file in the source code root directory
+ * or at <https://git.pixie.town/thufie/npl-builder>; either version 7
+ * of the license, or (at your option) any later version.
+ *
+ * GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
+ * permitted by applicable law.  See the CNPL for details.
+ */

include/gay/toolchain.h

@@ -0,0 +1,29 @@
+/* See the end of this file for copyright and license terms. */
+
+#pragma once
+
+#ifndef __clang__
+#error "Unsupported compiler, please use clang"
+#endif
+
+#ifdef __cplusplus
+#define __restrict
+#else
+#define __restrict restrict
+#endif
+
+#define __section(name) __attribute__(( section(#name) ))
+
+/*
+ * This file is part of GayBSD.
+ * Copyright (c) 2021 fef <owo@fef.moe>.
+ *
+ * GayBSD is nonviolent software: you may only use, redistribute, and/or
+ * modify it under the terms of the Cooperative Nonviolent Public License
+ * (CNPL) as found in the LICENSE file in the source code root directory
+ * or at <https://git.pixie.town/thufie/npl-builder>; either version 7
+ * of the license, or (at your option) any later version.
+ *
+ * GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
+ * permitted by applicable law.  See the CNPL for details.
+ */

include/gay/types.h

@@ -2,6 +2,10 @@
 
 #pragma once
 
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
 typedef __INT8_TYPE__		s8;
 typedef __UINT8_TYPE__		u8;
 

include/gay/util.h

@@ -0,0 +1,52 @@
+/* See the end of this file for copyright and license terms. */
+
+#pragma once
+
+#include <stddef.h>
+
+#ifndef offsetof
+#define offsetof(type, member) __builtin_offsetof(type, member)
+#endif
+
+#ifndef typeof
+#define typeof(expr) __typeof(expr)
+#endif
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+
+/**
+ * @brief Cast a pointer to a struct member out to the containing structure.
+ *
+ * @param ptr Pointer to the struct member
+ * @param type Type of the containing structure
+ * @param member Name of the member within the containing structure
+ * @returns Pointer to the containing structure
+ */
+#define container_of(ptr, type, member) \
+	((type)( (void *)(ptr) - offsetof(type, member) ))
+
+/**
+ * @brief Do an evil raw cast.
+ *
+ * @param type Type to cast to
+ * @param expr Expression to cast
+ * @returns The raw value of `expr`, cast to `type`
+ */
+#define raw_cast(type, expr) ({		\
+	typeof(expr) __expr = (expr);	\
+	*(type *)&__expr;		\
+})
+
+/*
+ * This file is part of GayBSD.
+ * Copyright (c) 2021 fef <owo@fef.moe>.
+ *
+ * GayBSD is nonviolent software: you may only use, redistribute, and/or
+ * modify it under the terms of the Cooperative Nonviolent Public License
+ * (CNPL) as found in the LICENSE file in the source code root directory
+ * or at <https://git.pixie.town/thufie/npl-builder>; either version 7
+ * of the license, or (at your option) any later version.
+ *
+ * GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
+ * permitted by applicable law.  See the CNPL for details.
+ */