diff options
Diffstat (limited to '9p/internal.h')
| -rw-r--r-- | 9p/internal.h | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/9p/internal.h b/9p/internal.h deleted file mode 100644 index 61977d4..0000000 --- a/9p/internal.h +++ /dev/null @@ -1,139 +0,0 @@ -/* 9p/internal.h - TODO - * - * Copyright (C) 2024 Luke T. Shumaker <lukeshu@lukeshu.com> - * SPDX-Licence-Identifier: AGPL-3.0-or-later - */ - -#ifndef _9P_INTERNAL_H_ -#define _9P_INTERNAL_H_ - -#include <assert.h> -#include <stdint.h> -#include <stdbool.h> - -#include "9p/defs.h" - -#define USE_CONFIG_9P -#include "config.h" -static_assert(CONFIG_9P_MAX_ERR_SIZE <= UINT16_MAX); - -/* C language *****************************************************************/ - -#define UNUSED(name) /* name __attribute__ ((unused)) */ - -/* types **********************************************************************/ - -struct p9_ctx { - enum p9_version version; - uint32_t max_msg_size; - uint32_t Rerror_overhead; - - uint32_t err_num; - char err_msg[CONFIG_9P_MAX_ERR_SIZE]; -}; - -static inline enum p9_version p9_ctx_version(p9_ctx *ctx) { - assert(ctx); - return ctx->version; -} - -/* vtables ********************************************************************/ - -typedef bool (*_checksize_fn_t)(uint32_t net_len, uint8_t *net_bytes, uint32_t *mut_net_offset, size_t *mut_host_extra); -typedef bool (*_unmarshal_fn_t)(uint8_t *net_bytes, uint32_t *mut_net_offset, void **mut_host_extra, void *out); -typedef bool (*_marshal_fn_t)(struct p9_ctx *ctx, void *val, uint8_t *out_net_bytes, uint32_t *mut_net_offset); - -struct msg_vtable { - size_t unmarshal_basesize; - _checksize_fn_t unmarshal_extrasize; - _unmarshal_fn_t unmarshal; - _marshal_fn_t marshal; -}; - -struct version { - struct msg_vtable msgs[0xFF]; -}; - -extern struct version version_9P2000; -/*extern struct version version_9P2000u; */ - -/* unmarshal utilities ********************************************************/ - -static inline uint8_t decode_u8le(uint8_t *in) { - return in[0]; -} -static inline uint16_t decode_u16le(uint8_t *in) { - return (((uint16_t)(in[0])) << 0) - | (((uint16_t)(in[1])) << 8) - ; -} -static inline uint32_t decode_u32le(uint8_t *in) { - return (((uint32_t)(in[0])) << 0) - | (((uint32_t)(in[1])) << 8) - | (((uint32_t)(in[2])) << 16) - | (((uint32_t)(in[3])) << 24) - ; -} -static inline uint64_t decode_u64le(uint8_t *in) { - return (((uint64_t)(in[0])) << 0) - | (((uint64_t)(in[1])) << 8) - | (((uint64_t)(in[2])) << 16) - | (((uint64_t)(in[3])) << 24) - | (((uint64_t)(in[4])) << 32) - | (((uint64_t)(in[5])) << 40) - | (((uint64_t)(in[6])) << 48) - | (((uint64_t)(in[7])) << 56) - ; -} - -static inline bool _is_valid_utf8(uint8_t *str, size_t len, bool forbid_nul) { - uint32_t ch; - uint8_t chlen; - assert(str); - for (size_t pos = 0; pos < len;) { - if ((str[pos] & 0b10000000) == 0b00000000) { ch = str[pos] & 0b01111111; chlen = 1; } - else if ((str[pos] & 0b11100000) == 0b11000000) { ch = str[pos] & 0b00011111; chlen = 2; } - else if ((str[pos] & 0b11110000) == 0b11100000) { ch = str[pos] & 0b00001111; chlen = 3; } - else if ((str[pos] & 0b11111000) == 0b11110000) { ch = str[pos] & 0b00000111; chlen = 4; } - else return false; - if ((ch == 0 && (chlen != 1 || forbid_nul)) || pos + chlen > len) return false; - for (uint8_t i = 1; i < chlen; i++) { - if ((str[pos+i] & 0b11000000) != 0b10000000) return false; - ch = (ch << 6) | (str[pos+i] & 0b00111111); - } - if (ch > 0x10FFFF) return false; - pos += chlen; - } - return true; -} - -#define is_valid_utf8(str, len) _is_valid_utf8(str, len, false) -#define is_valid_utf8_without_nul(str, len) _is_valid_utf8(str, len, true) - -/* marshal utilities **********************************************************/ - -static inline void encode_u8le(uint8_t in, uint8_t *out) { - out[0] = in; -} -static inline void encode_u16le(uint16_t in, uint8_t *out) { - out[0] = (uint8_t)((in >> 0) & 0xFF); - out[1] = (uint8_t)((in >> 8) & 0xFF); -} -static inline void encode_u32le(uint32_t in, uint8_t *out) { - out[0] = (uint8_t)((in >> 0) & 0xFF); - out[1] = (uint8_t)((in >> 8) & 0xFF); - out[2] = (uint8_t)((in >> 16) & 0xFF); - out[3] = (uint8_t)((in >> 24) & 0xFF); -} -static inline void encode_u64le(uint64_t in, uint8_t *out) { - out[0] = (uint8_t)((in >> 0) & 0xFF); - out[1] = (uint8_t)((in >> 8) & 0xFF); - out[2] = (uint8_t)((in >> 16) & 0xFF); - out[3] = (uint8_t)((in >> 24) & 0xFF); - out[4] = (uint8_t)((in >> 32) & 0xFF); - out[5] = (uint8_t)((in >> 40) & 0xFF); - out[6] = (uint8_t)((in >> 48) & 0xFF); - out[7] = (uint8_t)((in >> 56) & 0xFF); -} - -#endif /* _9P_INTERNAL_H_ */ |