1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <ctype.h>
7 #include <unistd.h>
8 #include <stdint.h>
9 #include "common.h"
10
bgets(struct buffer * input,void * output,size_t len)11 size_t bgets(struct buffer *input, void *output, size_t len)
12 {
13 len = input->size < len ? input->size : len;
14 memmove(output, input->data, len);
15 input->data += len;
16 input->size -= len;
17 return len;
18 }
19
bputs(struct buffer * b,const void * data,size_t len)20 size_t bputs(struct buffer *b, const void *data, size_t len)
21 {
22 memmove(&b->data[b->size], data, len);
23 b->size += len;
24 return len;
25 }
26
27 /* The assumption in all this code is that we're given a pointer to enough data.
28 * Hence, we do not check for underflow.
29 */
get8(struct buffer * input)30 static uint8_t get8(struct buffer *input)
31 {
32 uint8_t ret = *input->data++;
33 input->size--;
34 return ret;
35 }
36
get16be(struct buffer * input)37 static uint16_t get16be(struct buffer *input)
38 {
39 uint16_t ret;
40 ret = get8(input) << 8;
41 ret |= get8(input);
42 return ret;
43 }
44
get32be(struct buffer * input)45 static uint32_t get32be(struct buffer *input)
46 {
47 uint32_t ret;
48 ret = get16be(input) << 16;
49 ret |= get16be(input);
50 return ret;
51 }
52
get64be(struct buffer * input)53 static uint64_t get64be(struct buffer *input)
54 {
55 uint64_t ret;
56 ret = get32be(input);
57 ret <<= 32;
58 ret |= get32be(input);
59 return ret;
60 }
61
put8(struct buffer * input,uint8_t val)62 static void put8(struct buffer *input, uint8_t val)
63 {
64 input->data[input->size] = val;
65 input->size++;
66 }
67
put16be(struct buffer * input,uint16_t val)68 static void put16be(struct buffer *input, uint16_t val)
69 {
70 put8(input, val >> 8);
71 put8(input, val);
72 }
73
put32be(struct buffer * input,uint32_t val)74 static void put32be(struct buffer *input, uint32_t val)
75 {
76 put16be(input, val >> 16);
77 put16be(input, val);
78 }
79
put64be(struct buffer * input,uint64_t val)80 static void put64be(struct buffer *input, uint64_t val)
81 {
82 put32be(input, val >> 32);
83 put32be(input, val);
84 }
85
get16le(struct buffer * input)86 static uint16_t get16le(struct buffer *input)
87 {
88 uint16_t ret;
89 ret = get8(input);
90 ret |= get8(input) << 8;
91 return ret;
92 }
93
get32le(struct buffer * input)94 static uint32_t get32le(struct buffer *input)
95 {
96 uint32_t ret;
97 ret = get16le(input);
98 ret |= get16le(input) << 16;
99 return ret;
100 }
101
get64le(struct buffer * input)102 static uint64_t get64le(struct buffer *input)
103 {
104 uint64_t ret;
105 uint32_t low;
106 low = get32le(input);
107 ret = get32le(input);
108 ret <<= 32;
109 ret |= low;
110 return ret;
111 }
112
put16le(struct buffer * input,uint16_t val)113 static void put16le(struct buffer *input, uint16_t val)
114 {
115 put8(input, val);
116 put8(input, val >> 8);
117 }
118
put32le(struct buffer * input,uint32_t val)119 static void put32le(struct buffer *input, uint32_t val)
120 {
121 put16le(input, val);
122 put16le(input, val >> 16);
123 }
124
put64le(struct buffer * input,uint64_t val)125 static void put64le(struct buffer *input, uint64_t val)
126 {
127 put32le(input, val);
128 put32le(input, val >> 32);
129 }
130
131 struct xdr xdr_be = {
132 get8, get16be, get32be, get64be,
133 put8, put16be, put32be, put64be
134 };
135
136 struct xdr xdr_le = {
137 get8, get16le, get32le, get64le,
138 put8, put16le, put32le, put64le
139 };
140