[409] | 1 | /* Copyright 2009, UCAR/Unidata and OPeNDAP, Inc. |
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| 2 | See the COPYRIGHT file for more information. */ |
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| 3 | |
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| 4 | #include <stdlib.h> |
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| 5 | #include <stdio.h> |
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| 6 | #include <string.h> |
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| 7 | |
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| 8 | #include "ncbytes.h" |
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| 9 | |
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| 10 | #ifndef TRUE |
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| 11 | #define TRUE 1 |
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| 12 | #endif |
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| 13 | #ifndef FALSE |
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| 14 | #define FALSE 0 |
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| 15 | #endif |
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| 16 | |
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| 17 | #define DEFAULTALLOC 1024 |
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| 18 | #define ALLOCINCR 1024 |
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| 19 | |
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| 20 | static int ncbytesdebug = 1; |
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| 21 | |
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| 22 | static long |
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| 23 | ncbytesfail(void) |
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| 24 | { |
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| 25 | fflush(stdout); |
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| 26 | fprintf(stderr,"bytebuffer failure\n"); |
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| 27 | fflush(stderr); |
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| 28 | if(ncbytesdebug) abort(); |
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| 29 | return FALSE; |
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| 30 | } |
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| 31 | |
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| 32 | NCbytes* |
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| 33 | ncbytesnew(void) |
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| 34 | { |
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| 35 | NCbytes* bb = (NCbytes*)malloc(sizeof(NCbytes)); |
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| 36 | if(bb == NULL) return (NCbytes*)ncbytesfail(); |
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| 37 | bb->alloc=0; |
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| 38 | bb->length=0; |
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| 39 | bb->content=NULL; |
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| 40 | bb->nonextendible = 0; |
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| 41 | return bb; |
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| 42 | } |
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| 43 | |
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| 44 | int |
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| 45 | ncbytessetalloc(NCbytes* bb, unsigned int sz) |
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| 46 | { |
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| 47 | char* newcontent; |
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| 48 | if(bb == NULL) return ncbytesfail(); |
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| 49 | if(sz <= 0) {sz = (bb->alloc?2*bb->alloc:DEFAULTALLOC);} |
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| 50 | if(bb->alloc >= sz) return TRUE; |
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| 51 | if(bb->nonextendible) return ncbytesfail(); |
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| 52 | newcontent=(char*)calloc(sz,sizeof(char)); |
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| 53 | if(bb->alloc > 0 && bb->length > 0 && bb->content != NULL) { |
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| 54 | memcpy((void*)newcontent,(void*)bb->content,sizeof(char)*bb->length); |
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| 55 | } |
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| 56 | if(bb->content != NULL) free(bb->content); |
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| 57 | bb->content=newcontent; |
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| 58 | bb->alloc=sz; |
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| 59 | return TRUE; |
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| 60 | } |
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| 61 | |
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| 62 | void |
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| 63 | ncbytesfree(NCbytes* bb) |
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| 64 | { |
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| 65 | if(bb == NULL) return; |
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| 66 | if(!bb->nonextendible && bb->content != NULL) free(bb->content); |
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| 67 | free(bb); |
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| 68 | } |
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| 69 | |
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| 70 | int |
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| 71 | ncbytessetlength(NCbytes* bb, unsigned int sz) |
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| 72 | { |
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| 73 | if(bb == NULL) return ncbytesfail(); |
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| 74 | if(sz > bb->alloc) {if(!ncbytessetalloc(bb,sz)) return ncbytesfail();} |
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| 75 | bb->length = sz; |
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| 76 | return TRUE; |
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| 77 | } |
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| 78 | |
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| 79 | int |
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| 80 | ncbytesfill(NCbytes* bb, char fill) |
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| 81 | { |
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| 82 | unsigned int i; |
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| 83 | if(bb == NULL) return ncbytesfail(); |
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| 84 | for(i=0;i<bb->length;i++) bb->content[i] = fill; |
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| 85 | return TRUE; |
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| 86 | } |
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| 87 | |
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| 88 | int |
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| 89 | ncbytesget(NCbytes* bb, unsigned int index) |
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| 90 | { |
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| 91 | if(bb == NULL) return -1; |
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| 92 | if(index >= bb->length) return -1; |
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| 93 | return bb->content[index]; |
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| 94 | } |
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| 95 | |
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| 96 | int |
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| 97 | ncbytesset(NCbytes* bb, unsigned int index, char elem) |
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| 98 | { |
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| 99 | if(bb == NULL) return ncbytesfail(); |
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| 100 | if(index >= bb->length) return ncbytesfail(); |
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| 101 | bb->content[index] = elem; |
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| 102 | return TRUE; |
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| 103 | } |
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| 104 | |
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| 105 | int |
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| 106 | ncbytesappend(NCbytes* bb, char elem) |
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| 107 | { |
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| 108 | if(bb == NULL) return ncbytesfail(); |
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| 109 | if(bb->length >= bb->alloc) if(!ncbytessetalloc(bb,0)) return ncbytesfail(); |
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| 110 | bb->content[bb->length] = elem; |
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| 111 | bb->length++; |
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| 112 | return TRUE; |
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| 113 | } |
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| 114 | |
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| 115 | /* This assumes s is a null terminated string*/ |
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| 116 | int |
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| 117 | ncbytescat(NCbytes* bb, char* s) |
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| 118 | { |
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| 119 | ncbytesappendn(bb,(void*)s,strlen(s)+1); /* include trailing null*/ |
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| 120 | /* back up over the trailing null*/ |
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| 121 | if(bb->length == 0) return ncbytesfail(); |
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| 122 | bb->length--; |
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| 123 | return 1; |
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| 124 | } |
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| 125 | |
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| 126 | int |
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| 127 | ncbytesappendn(NCbytes* bb, void* elem, unsigned int n) |
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| 128 | { |
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| 129 | if(bb == NULL || elem == NULL) return ncbytesfail(); |
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| 130 | if(n == 0) {n = strlen((char*)elem);} |
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| 131 | while(!ncbytesavail(bb,n)) {if(!ncbytessetalloc(bb,0)) return ncbytesfail();} |
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| 132 | memcpy((void*)&bb->content[bb->length],(void*)elem,n); |
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| 133 | bb->length += n; |
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| 134 | return TRUE; |
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| 135 | } |
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| 136 | |
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| 137 | int |
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| 138 | ncbytesprepend(NCbytes* bb, char elem) |
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| 139 | { |
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| 140 | int i; /* do not make unsigned */ |
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| 141 | if(bb == NULL) return ncbytesfail(); |
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| 142 | if(bb->length >= bb->alloc) if(!ncbytessetalloc(bb,0)) return ncbytesfail(); |
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| 143 | /* could we trust memcpy? instead */ |
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| 144 | for(i=bb->alloc;i>=1;i--) {bb->content[i]=bb->content[i-1];} |
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| 145 | bb->content[0] = elem; |
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| 146 | bb->length++; |
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| 147 | return TRUE; |
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| 148 | } |
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| 149 | |
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| 150 | char* |
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| 151 | ncbytesdup(NCbytes* bb) |
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| 152 | { |
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| 153 | char* result = (char*)malloc(bb->length+1); |
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| 154 | memcpy((void*)result,(const void*)bb->content,bb->length); |
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| 155 | result[bb->length] = '\0'; /* just in case it is a string*/ |
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| 156 | return result; |
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| 157 | } |
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| 158 | |
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| 159 | char* |
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| 160 | ncbytesextract(NCbytes* bb) |
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| 161 | { |
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| 162 | char* result = bb->content; |
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| 163 | bb->alloc = 0; |
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| 164 | bb->length = 0; |
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| 165 | bb->content = NULL; |
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| 166 | return result; |
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| 167 | } |
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| 168 | |
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| 169 | int |
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| 170 | ncbytessetcontents(NCbytes* bb, char* contents, unsigned int alloc) |
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| 171 | { |
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| 172 | if(bb == NULL) return ncbytesfail(); |
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| 173 | ncbytesclear(bb); |
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| 174 | if(!bb->nonextendible && bb->content != NULL) free(bb->content); |
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| 175 | bb->content = contents; |
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| 176 | bb->length = 0; |
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| 177 | bb->alloc = alloc; |
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| 178 | bb->nonextendible = 1; |
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| 179 | return 1; |
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| 180 | } |
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| 181 | |
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| 182 | /* Null terminate the byte string without extending its length */ |
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| 183 | /* For debugging */ |
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| 184 | int |
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| 185 | ncbytesnull(NCbytes* bb) |
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| 186 | { |
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| 187 | ncbytesappend(bb,'\0'); |
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| 188 | bb->length--; |
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| 189 | return 1; |
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| 190 | } |
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| 191 | |
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