src/buffer.c

Fri, 25 Feb 2022 14:35:18 +0100

author
Mike Becker <universe@uap-core.de>
date
Fri, 25 Feb 2022 14:35:18 +0100
changeset 506
18782bbe3607
parent 501
9a08f5e515cc
child 529
814d51173f20
permissions
-rw-r--r--

add setup and teardown functions to test_list.c

483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
1 /*
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
3 *
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
4 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
5 *
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
6 * Redistribution and use in source and binary forms, with or without
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
7 * modification, are permitted provided that the following conditions are met:
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
8 *
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
9 * 1. Redistributions of source code must retain the above copyright
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
10 * notice, this list of conditions and the following disclaimer.
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
11 *
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
12 * 2. Redistributions in binary form must reproduce the above copyright
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
13 * notice, this list of conditions and the following disclaimer in the
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
14 * documentation and/or other materials provided with the distribution.
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
15 *
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
26 * POSSIBILITY OF SUCH DAMAGE.
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
27 */
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
28
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
29 #include "cx/buffer.h"
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
30 #include "cx/utils.h"
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
31
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
32 #include <stdlib.h>
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
33 #include <string.h>
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
34
501
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
35 int cxBufferInit(
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
36 CxBuffer *buffer,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
37 void *space,
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
38 size_t capacity,
501
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
39 CxAllocator *allocator,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
40 int flags
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
41 ) {
501
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
42 buffer->allocator = allocator;
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
43 buffer->flags = flags;
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
44 if (!space) {
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
45 buffer->bytes = cxMalloc(allocator, capacity);
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
46 if (buffer->bytes == NULL) {
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
47 return 1;
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
48 }
501
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
49 memset(buffer->bytes, 0, capacity);
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
50 buffer->flags |= CX_BUFFER_FREE_CONTENTS;
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
51 } else {
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
52 buffer->bytes = space;
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
53 }
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
54 buffer->capacity = capacity;
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
55 buffer->size = 0;
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
56
501
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
57 buffer->pos = 0;
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
58
501
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
59 return 0;
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
60 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
61
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
62 void cxBufferDestroy(CxBuffer *buffer) {
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
63 if ((buffer->flags & CX_BUFFER_FREE_CONTENTS) == CX_BUFFER_FREE_CONTENTS) {
501
9a08f5e515cc add allocator support to CxBuffer
Mike Becker <universe@uap-core.de>
parents: 500
diff changeset
64 cxFree(buffer->allocator, buffer->bytes);
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
65 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
66 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
67
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
68 CxBuffer *cxBufferExtract(
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
69 CxBuffer *src,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
70 size_t start,
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
71 size_t length,
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
72 int flags
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
73 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
74 if (src->size == 0 || length == 0 ||
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
75 ((size_t) -1) - start < length || start + length > src->capacity) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
76 return NULL;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
77 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
78
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
79 CxBuffer *dst = (CxBuffer *) malloc(sizeof(cx_buffer_s));
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
80 if (dst) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
81 dst->bytes = malloc(length);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
82 if (!dst->bytes) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
83 free(dst);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
84 return NULL;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
85 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
86 dst->capacity = length;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
87 dst->size = length;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
88 dst->flags = flags | CX_BUFFER_FREE_CONTENTS;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
89 dst->pos = 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
90 memcpy(dst->bytes, src->bytes + start, length);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
91 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
92 return dst;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
93 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
94
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
95 int cxBufferSeek(
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
96 CxBuffer *buffer,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
97 off_t offset,
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
98 int whence
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
99 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
100 size_t npos;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
101 switch (whence) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
102 case SEEK_CUR:
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
103 npos = buffer->pos;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
104 break;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
105 case SEEK_END:
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
106 npos = buffer->size;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
107 break;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
108 case SEEK_SET:
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
109 npos = 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
110 break;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
111 default:
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
112 return -1;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
113 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
114
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
115 size_t opos = npos;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
116 npos += offset;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
117
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
118 if ((offset > 0 && npos < opos) || (offset < 0 && npos > opos)) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
119 return -1;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
120 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
121
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
122 if (npos >= buffer->size) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
123 return -1;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
124 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
125 buffer->pos = npos;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
126 return 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
127 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
128
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
129 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
130
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
131 int cxBufferEof(CxBuffer *buffer) {
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
132 return buffer->pos >= buffer->size;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
133 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
134
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
135 int cxBufferMinimumCapacity(
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
136 CxBuffer *buffer,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
137 size_t additional_bytes
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
138 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
139 size_t newcap = buffer->capacity + additional_bytes;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
140
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
141 // overflow protection
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
142 if (newcap < buffer->capacity) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
143 return -1;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
144 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
145
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
146 unsigned char *newspace = realloc(buffer->bytes, newcap);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
147 if (newspace) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
148 memset(newspace + buffer->size, 0, newcap - buffer->size);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
149 buffer->bytes = newspace;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
150 buffer->capacity = newcap;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
151 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
152 return -1;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
153 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
154
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
155 return 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
156 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
157
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
158 size_t cxBufferWrite(
489
af6be1e123aa add some const qualifiers
Mike Becker <universe@uap-core.de>
parents: 483
diff changeset
159 void const *ptr,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
160 size_t size,
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
161 size_t nitems,
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
162 CxBuffer *buffer
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
163 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
164 size_t len;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
165 if (cx_szmul(size, nitems, &len)) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
166 return 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
167 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
168 size_t required = buffer->pos + len;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
169 if (buffer->pos > required) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
170 return 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
171 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
172
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
173 if (required > buffer->capacity) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
174 if ((buffer->flags & CX_BUFFER_AUTO_EXTEND) == CX_BUFFER_AUTO_EXTEND) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
175 if (cxBufferMinimumCapacity(buffer, required)) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
176 return 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
177 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
178 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
179 len = buffer->capacity - buffer->pos;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
180 if (size > 1) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
181 len -= len % size;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
182 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
183 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
184 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
185
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
186 if (len == 0) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
187 return len;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
188 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
189
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
190 memcpy(buffer->bytes + buffer->pos, ptr, len);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
191 buffer->pos += len;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
192 if (buffer->pos > buffer->size) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
193 buffer->size = buffer->pos;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
194 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
195
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
196 return len / size;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
197 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
198
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
199 size_t cxBufferRead(
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
200 void *ptr,
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
201 size_t size,
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
202 size_t nitems,
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
203 CxBuffer *buffer
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
204 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
205 size_t len;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
206 if (cx_szmul(size, nitems, &len)) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
207 return 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
208 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
209 if (buffer->pos + len > buffer->size) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
210 len = buffer->size - buffer->pos;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
211 if (size > 1) len -= len % size;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
212 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
213
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
214 if (len <= 0) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
215 return len;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
216 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
217
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
218 memcpy(ptr, buffer->bytes + buffer->pos, len);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
219 buffer->pos += len;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
220
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
221 return len / size;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
222 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
223
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
224 int cxBufferPut(
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
225 CxBuffer *buffer,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
226 int c
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
227 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
228 if (buffer->pos >= buffer->capacity) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
229 if ((buffer->flags & CX_BUFFER_AUTO_EXTEND) == CX_BUFFER_AUTO_EXTEND) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
230 if (cxBufferMinimumCapacity(buffer, buffer->capacity + 1)) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
231 return EOF;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
232 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
233 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
234 return EOF;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
235 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
236 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
237
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
238 c &= 0xFF;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
239 buffer->bytes[buffer->pos] = (unsigned char) c;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
240 buffer->pos++;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
241 if (buffer->pos > buffer->size) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
242 buffer->size = buffer->pos;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
243 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
244 return c;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
245 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
246
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
247 int cxBufferGet(CxBuffer *buffer) {
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
248 if (cxBufferEof(buffer)) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
249 return EOF;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
250 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
251 int c = buffer->bytes[buffer->pos];
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
252 buffer->pos++;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
253 return c;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
254 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
255 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
256
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
257 size_t cxBufferPutString(
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
258 CxBuffer *buffer,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
259 const char *str
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
260 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
261 return cxBufferWrite(str, 1, strlen(str), buffer);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
262 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
263
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
264 int cxBufferShiftLeft(
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
265 CxBuffer *buffer,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
266 size_t shift
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
267 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
268 if (shift >= buffer->size) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
269 buffer->pos = buffer->size = 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
270 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
271 memmove(buffer->bytes, buffer->bytes + shift, buffer->size - shift);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
272 buffer->size -= shift;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
273
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
274 if (buffer->pos >= shift) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
275 buffer->pos -= shift;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
276 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
277 buffer->pos = 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
278 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
279 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
280 return 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
281 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
282
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
283 int cxBufferShiftRight(
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
284 CxBuffer *buffer,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
285 size_t shift
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
286 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
287 size_t req_capacity = buffer->size + shift;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
288 size_t movebytes;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
289
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
290 // auto extend buffer, if required and enabled
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
291 if (buffer->capacity < req_capacity) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
292 if ((buffer->flags & CX_BUFFER_AUTO_EXTEND) == CX_BUFFER_AUTO_EXTEND) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
293 if (cxBufferMinimumCapacity(buffer, req_capacity)) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
294 return 1;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
295 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
296 movebytes = buffer->size;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
297 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
298 movebytes = buffer->capacity - shift;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
299 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
300 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
301 movebytes = buffer->size;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
302 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
303
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
304 memmove(buffer->bytes + shift, buffer->bytes, movebytes);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
305 buffer->size = shift + movebytes;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
306
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
307 buffer->pos += shift;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
308 if (buffer->pos > buffer->size) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
309 buffer->pos = buffer->size;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
310 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
311
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
312 return 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
313 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
314
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
315 int cxBufferShift(
500
eb9e7bd40a8e do not hide pointers behind typedefs
Mike Becker <universe@uap-core.de>
parents: 489
diff changeset
316 CxBuffer *buffer,
483
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
317 off_t shift
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
318 ) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
319 if (shift < 0) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
320 return cxBufferShiftLeft(buffer, (size_t) (-shift));
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
321 } else if (shift > 0) {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
322 return cxBufferShiftRight(buffer, (size_t) shift);
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
323 } else {
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
324 return 0;
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
325 }
929016224c3c add ported UCX buffer implementation
Mike Becker <universe@uap-core.de>
parents:
diff changeset
326 }

mercurial