1 | /* Copyright 2009, UCAR/Unidata and OPeNDAP, Inc. |
---|
2 | See the COPYRIGHT file for more information. */ |
---|
3 | |
---|
4 | #include "config.h" |
---|
5 | |
---|
6 | #include <stdlib.h> |
---|
7 | #include <stdio.h> |
---|
8 | #include <string.h> |
---|
9 | |
---|
10 | #include "ocbytes.h" |
---|
11 | |
---|
12 | #ifndef TRUE |
---|
13 | #define TRUE 1 |
---|
14 | #endif |
---|
15 | #ifndef FALSE |
---|
16 | #define FALSE 0 |
---|
17 | #endif |
---|
18 | |
---|
19 | #define DEFAULTALLOC 1024 |
---|
20 | #define ALLOCINCR 1024 |
---|
21 | |
---|
22 | static int ocbytesdebug = 1; |
---|
23 | |
---|
24 | static long |
---|
25 | ocbytesfail(void) |
---|
26 | { |
---|
27 | fflush(stdout); |
---|
28 | fprintf(stderr,"bytebuffer failure\n"); |
---|
29 | fflush(stderr); |
---|
30 | if(ocbytesdebug) abort(); |
---|
31 | return FALSE; |
---|
32 | } |
---|
33 | |
---|
34 | OCbytes* |
---|
35 | ocbytesnew(void) |
---|
36 | { |
---|
37 | OCbytes* bb = (OCbytes*)malloc(sizeof(OCbytes)); |
---|
38 | if(bb == NULL) return (OCbytes*)ocbytesfail(); |
---|
39 | bb->alloc=0; |
---|
40 | bb->length=0; |
---|
41 | bb->content=NULL; |
---|
42 | bb->nonextendible = 0; |
---|
43 | return bb; |
---|
44 | } |
---|
45 | |
---|
46 | int |
---|
47 | ocbytessetalloc(OCbytes* bb, unsigned int sz) |
---|
48 | { |
---|
49 | char* newcontent; |
---|
50 | if(bb == NULL) return ocbytesfail(); |
---|
51 | if(sz <= 0) {sz = (bb->alloc?2*bb->alloc:DEFAULTALLOC);} |
---|
52 | if(bb->alloc >= sz) return TRUE; |
---|
53 | if(bb->nonextendible) return ocbytesfail(); |
---|
54 | newcontent=(char*)calloc(sz,sizeof(char)); |
---|
55 | if(newcontent == NULL) return FALSE; |
---|
56 | if(bb->alloc > 0 && bb->length > 0 && bb->content != NULL) { |
---|
57 | memcpy((void*)newcontent,(void*)bb->content,sizeof(char)*bb->length); |
---|
58 | } |
---|
59 | if(bb->content != NULL) free(bb->content); |
---|
60 | bb->content=newcontent; |
---|
61 | bb->alloc=sz; |
---|
62 | return TRUE; |
---|
63 | } |
---|
64 | |
---|
65 | void |
---|
66 | ocbytesfree(OCbytes* bb) |
---|
67 | { |
---|
68 | if(bb == NULL) return; |
---|
69 | if(!bb->nonextendible && bb->content != NULL) free(bb->content); |
---|
70 | free(bb); |
---|
71 | } |
---|
72 | |
---|
73 | int |
---|
74 | ocbytessetlength(OCbytes* bb, unsigned int sz) |
---|
75 | { |
---|
76 | if(bb == NULL) return ocbytesfail(); |
---|
77 | if(sz > bb->alloc) {if(!ocbytessetalloc(bb,sz)) return ocbytesfail();} |
---|
78 | bb->length = sz; |
---|
79 | return TRUE; |
---|
80 | } |
---|
81 | |
---|
82 | int |
---|
83 | ocbytesfill(OCbytes* bb, char fill) |
---|
84 | { |
---|
85 | unsigned int i; |
---|
86 | if(bb == NULL) return ocbytesfail(); |
---|
87 | for(i=0;i<bb->length;i++) bb->content[i] = fill; |
---|
88 | return TRUE; |
---|
89 | } |
---|
90 | |
---|
91 | int |
---|
92 | ocbytesget(OCbytes* bb, unsigned int index) |
---|
93 | { |
---|
94 | if(bb == NULL) return -1; |
---|
95 | if(index >= bb->length) return -1; |
---|
96 | return bb->content[index]; |
---|
97 | } |
---|
98 | |
---|
99 | int |
---|
100 | ocbytesset(OCbytes* bb, unsigned int index, char elem) |
---|
101 | { |
---|
102 | if(bb == NULL) return ocbytesfail(); |
---|
103 | if(index >= bb->length) return ocbytesfail(); |
---|
104 | bb->content[index] = elem; |
---|
105 | return TRUE; |
---|
106 | } |
---|
107 | |
---|
108 | int |
---|
109 | ocbytesappend(OCbytes* bb, char elem) |
---|
110 | { |
---|
111 | if(bb == NULL) return ocbytesfail(); |
---|
112 | /* We need space for the char + null */ |
---|
113 | while(bb->length+1 >= bb->alloc) { |
---|
114 | if(!ocbytessetalloc(bb,0)) return ocbytesfail(); |
---|
115 | } |
---|
116 | bb->content[bb->length] = elem; |
---|
117 | bb->length++; |
---|
118 | bb->content[bb->length] = '\0'; |
---|
119 | return TRUE; |
---|
120 | } |
---|
121 | |
---|
122 | /* This assumes s is a null terminated string*/ |
---|
123 | int |
---|
124 | ocbytescat(OCbytes* bb, char* s) |
---|
125 | { |
---|
126 | ocbytesappendn(bb,(void*)s,strlen(s)+1); /* include trailing null*/ |
---|
127 | /* back up over the trailing null*/ |
---|
128 | if(bb->length == 0) return ocbytesfail(); |
---|
129 | bb->length--; |
---|
130 | return 1; |
---|
131 | } |
---|
132 | |
---|
133 | int |
---|
134 | ocbytesappendn(OCbytes* bb, void* elem, unsigned int n) |
---|
135 | { |
---|
136 | if(bb == NULL || elem == NULL) return ocbytesfail(); |
---|
137 | if(n == 0) {n = strlen((char*)elem);} |
---|
138 | while(!ocbytesavail(bb,n+1)) { |
---|
139 | if(!ocbytessetalloc(bb,0)) return ocbytesfail(); |
---|
140 | } |
---|
141 | memcpy((void*)&bb->content[bb->length],(void*)elem,n); |
---|
142 | bb->length += n; |
---|
143 | bb->content[bb->length] = '\0'; |
---|
144 | return TRUE; |
---|
145 | } |
---|
146 | |
---|
147 | int |
---|
148 | ocbytesprepend(OCbytes* bb, char elem) |
---|
149 | { |
---|
150 | int i; /* do not make unsigned */ |
---|
151 | if(bb == NULL) return ocbytesfail(); |
---|
152 | if(bb->length >= bb->alloc) if(!ocbytessetalloc(bb,0)) return ocbytesfail(); |
---|
153 | /* could we trust memcpy? instead */ |
---|
154 | for(i=bb->alloc;i>=1;i--) {bb->content[i]=bb->content[i-1];} |
---|
155 | bb->content[0] = elem; |
---|
156 | bb->length++; |
---|
157 | return TRUE; |
---|
158 | } |
---|
159 | |
---|
160 | char* |
---|
161 | ocbytesdup(OCbytes* bb) |
---|
162 | { |
---|
163 | char* result = (char*)malloc(bb->length+1); |
---|
164 | memcpy((void*)result,(const void*)bb->content,bb->length); |
---|
165 | result[bb->length] = '\0'; /* just in case it is a string*/ |
---|
166 | return result; |
---|
167 | } |
---|
168 | |
---|
169 | char* |
---|
170 | ocbytesextract(OCbytes* bb) |
---|
171 | { |
---|
172 | char* result = bb->content; |
---|
173 | bb->alloc = 0; |
---|
174 | bb->length = 0; |
---|
175 | bb->content = NULL; |
---|
176 | return result; |
---|
177 | } |
---|
178 | |
---|
179 | int |
---|
180 | ocbytessetcontents(OCbytes* bb, char* contents, unsigned int alloc) |
---|
181 | { |
---|
182 | if(bb == NULL) return ocbytesfail(); |
---|
183 | ocbytesclear(bb); |
---|
184 | if(!bb->nonextendible && bb->content != NULL) free(bb->content); |
---|
185 | bb->content = contents; |
---|
186 | bb->length = 0; |
---|
187 | bb->alloc = alloc; |
---|
188 | bb->nonextendible = 1; |
---|
189 | return 1; |
---|
190 | } |
---|