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/* Copyright 2009, UCAR/Unidata and OPeNDAP, Inc.
See the COPYRIGHT file for more information. */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "ncbytes.h"
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#define DEFAULTALLOC 1024
#define ALLOCINCR 1024
static int ncbytesdebug = 1;
static int
ncbytesfail(void)
{
fflush(stdout);
fprintf(stderr,"bytebuffer failure\n");
fflush(stderr);
if(ncbytesdebug) abort();
return FALSE;
}
NCbytes*
ncbytesnew(void)
{
NCbytes* bb = (NCbytes*)malloc(sizeof(NCbytes));
if(bb == NULL) return (ncbytesfail(),NULL);
bb->alloc=0;
bb->length=0;
bb->content=NULL;
bb->nonextendible = 0;
return bb;
}
int
ncbytessetalloc(NCbytes* bb, unsigned long sz)
{
char* newcontent;
if(bb == NULL) return ncbytesfail();
if(sz <= 0) {sz = (bb->alloc?2*bb->alloc:DEFAULTALLOC);}
if(bb->alloc >= sz) return TRUE;
if(bb->nonextendible) return ncbytesfail();
newcontent=(char*)calloc(sz,sizeof(char));
if(newcontent == NULL) return FALSE;
if(bb->alloc > 0 && bb->length > 0 && bb->content != NULL) {
memcpy((void*)newcontent,(void*)bb->content,sizeof(char)*bb->length);
}
if(bb->content != NULL) free(bb->content);
bb->content=newcontent;
bb->alloc=sz;
return TRUE;
}
void
ncbytesfree(NCbytes* bb)
{
if(bb == NULL) return;
if(!bb->nonextendible && bb->content != NULL) free(bb->content);
free(bb);
}
int
ncbytessetlength(NCbytes* bb, unsigned long sz)
{
if(bb == NULL) return ncbytesfail();
if(bb->length < sz) {
if(sz > bb->alloc) {if(!ncbytessetalloc(bb,sz)) return ncbytesfail();}
}
bb->length = sz;
return TRUE;
}
int
ncbytesfill(NCbytes* bb, char fill)
{
unsigned long i;
if(bb == NULL) return ncbytesfail();
for(i=0;i<bb->length;i++) bb->content[i] = fill;
return TRUE;
}
int
ncbytesget(NCbytes* bb, unsigned long index)
{
if(bb == NULL) return -1;
if(index >= bb->length) return -1;
return bb->content[index];
}
int
ncbytesset(NCbytes* bb, unsigned long index, char elem)
{
if(bb == NULL) return ncbytesfail();
if(index >= bb->length) return ncbytesfail();
bb->content[index] = elem;
return TRUE;
}
int
ncbytesappend(NCbytes* bb, char elem)
{
if(bb == NULL) return ncbytesfail();
/* We need space for the char + null */
while(bb->length+1 >= bb->alloc) {
if(!ncbytessetalloc(bb,0)) return ncbytesfail();
}
bb->content[bb->length] = (char)(elem & 0xFF);
bb->length++;
bb->content[bb->length] = '\0';
return TRUE;
}
/* This assumes s is a null terminated string*/
int
ncbytescat(NCbytes* bb, const char* s)
{
if(s == NULL) {
return 1;
}
ncbytesappendn(bb,(void*)s,strlen(s)+1); /* include trailing null*/
/* back up over the trailing null*/
if(bb->length == 0) return ncbytesfail();
bb->length--;
return 1;
}
int
ncbytesappendn(NCbytes* bb, const void* elem, unsigned long n)
{
if(bb == NULL || elem == NULL) return ncbytesfail();
if(n == 0) {n = strlen((char*)elem);}
while(!ncbytesavail(bb,n+1)) {
if(!ncbytessetalloc(bb,0)) return ncbytesfail();
}
memcpy((void*)&bb->content[bb->length],(void*)elem,n);
bb->length += n;
bb->content[bb->length] = '\0';
return TRUE;
}
int
ncbytesprepend(NCbytes* bb, char elem)
{
int i; /* do not make unsigned */
if(bb == NULL) return ncbytesfail();
if(bb->length >= bb->alloc) if(!ncbytessetalloc(bb,0)) return ncbytesfail();
/* could we trust memcpy? instead */
for(i=(int)bb->alloc;i>=1;i--) {bb->content[i]=bb->content[i-1];}
bb->content[0] = elem;
bb->length++;
return TRUE;
}
char*
ncbytesdup(NCbytes* bb)
{
char* result = (char*)malloc(bb->length+1);
memcpy((void*)result,(const void*)bb->content,bb->length);
result[bb->length] = '\0'; /* just in case it is a string*/
return result;
}
char*
ncbytesextract(NCbytes* bb)
{
char* result = bb->content;
bb->alloc = 0;
bb->length = 0;
bb->content = NULL;
return result;
}
int
ncbytessetcontents(NCbytes* bb, char* contents, unsigned long alloc)
{
if(bb == NULL) return ncbytesfail();
ncbytesclear(bb);
if(!bb->nonextendible && bb->content != NULL) free(bb->content);
bb->content = contents;
bb->length = 0;
bb->alloc = alloc;
bb->nonextendible = 1;
return 1;
}
/* Null terminate the byte string without extending its length */
/* For debugging */
int
ncbytesnull(NCbytes* bb)
{
ncbytesappend(bb,'\0');
bb->length--;
return 1;
}
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