*
* Buffer Manipulation
*/
+#define DEBUG 0
#include <acess.h>
#include <udi.h>
+#include <udi_internal.h>
+
+typedef struct sUDI_BufTag
+{
+ struct sUDI_BufTag *Next;
+// udi_buf_tag_t tag;
+ struct sUDI_BufSect *Sect;
+} tUDI_BufTag;
+
+typedef struct sUDI_BufSect
+{
+ struct sUDI_BufSect *Next;
+ size_t RelOfs;
+ size_t Length;
+ size_t Space;
+ void *Data;
+ // data
+} tUDI_BufSect;
+
+typedef struct
+{
+ udi_buf_t buf;
+ tUDI_BufTag *Tags;
+ tUDI_BufSect *Sections;
+} tUDI_BufInt;
// === EXPORTS ===
EXPORT(udi_buf_copy);
udi_buf_t *dst_buf,
udi_size_t dst_off,
udi_size_t dst_len,
+ udi_buf_path_t path_handle
+ )
+{
+ if( !src_len ) {
+ // why?
+ }
+ // Quick and evil option - allocate temp buffer, udi_buf_read + udi_buf_write
+ void *tmp = malloc(src_len);
+ udi_buf_read(src_buf, src_off, src_len, tmp);
+
+ void tmp_callback(udi_cb_t *gcb, udi_buf_t *new_buf) {
+ dst_buf = new_buf;
+ }
+
+ udi_buf_write(tmp_callback, NULL, tmp, src_len, dst_buf, dst_off, dst_len, path_handle);
+ free(tmp);
+
+ if( callback ) {
+ callback(gcb, dst_buf);
+ }
+}
+
+tUDI_BufSect *UDI_int_BufAddSect(size_t data_len, size_t relofs, tUDI_BufSect **prevptr, const void *data,
udi_buf_path_t path_handle
)
{
- UNIMPLEMENTED();
+ const int space_atom = 1<<7;
+ size_t space = (data_len + space_atom-1) & ~(space_atom-1);
+ tUDI_BufSect *newsect = NEW(tUDI_BufSect, + space);
+ newsect->RelOfs = relofs;
+ newsect->Length = data_len;
+ newsect->Space = space_atom;
+ newsect->Data = newsect+1;
+ if( !data )
+ memset(newsect->Data, 0xFF, data_len);
+ else
+ memcpy(newsect->Data, data, data_len);
+
+ newsect->Next = *prevptr;
+ *prevptr = newsect;
+ LOG("@0x%x : %p <= %p+%i", relofs, newsect->Data, data, data_len);
+
+ return newsect;
+}
+
+udi_buf_t *_udi_buf_allocate(const void *data, udi_size_t length, udi_buf_path_t path_handle)
+{
+ tUDI_BufInt *buf = NEW(tUDI_BufInt,);
+ udi_buf_t *ret = &buf->buf;
+
+ if( data ) {
+ UDI_int_BufAddSect(length, 0, &buf->Sections, data, path_handle);
+ }
+ ret->buf_size = length;
+
+ return ret;
}
/**
* \param src_len Length of source data
* \param dst_buf Destination buffer
* \param dst_off Destination offset in the buffer
- * \param dst_len Length of destination area (What the?, Redundant
- * Department of redundacny department)
+ * \param dst_len Length of area to be replaced
* \param path_handle ???
*/
void udi_buf_write(
udi_buf_path_t path_handle
)
{
- UNIMPLEMENTED();
+ ENTER("psrc_mem isrc_len pdst_buf idst_off idst_len",
+ src_mem, src_len, dst_buf, dst_off, dst_len);
+
+ tUDI_BufInt *dst = (void*)dst_buf;
+ if( !dst ) {
+ dst = NEW(tUDI_BufInt,);
+ dst_buf = &dst->buf;
+ }
+
+ // Find dst_off segment
+ tUDI_BufSect **prevptr = &dst->Sections;
+ tUDI_BufSect *sect = dst->Sections;
+ for( ; sect; prevptr = §->Next, sect = sect->Next )
+ {
+ if(sect->RelOfs >= dst_off)
+ break;
+ if(sect->RelOfs + sect->Length > dst_off)
+ break ;
+ dst_off -= sect->RelOfs + sect->Length;
+ }
+
+ LOG("sect = %p", sect);
+
+ // Overwrite MIN(src_len,dst_len) bytes
+ // then delete/append remainder
+ size_t len = MIN(src_len,dst_len);
+ src_len -= len;
+ dst_len -= len;
+ while( len > 0 )
+ {
+ LOG("Overwriting %i bytes", len);
+ // Create new section
+ if( !sect || sect->RelOfs > dst_off ) {
+ size_t newsize = (sect && sect->RelOfs - dst_off < len) ? sect->RelOfs - dst_off : len;
+ sect = UDI_int_BufAddSect(len, dst_off, prevptr, src_mem, path_handle);
+ len -= newsize;
+ src_mem += newsize;
+ prevptr = §->Next;
+ sect = sect->Next;
+ dst_off = 0;
+ }
+ if( len == 0 )
+ break;
+ LOG("- dst_off = %i, data=%p", dst_off, sect->Data);
+
+ // Update existing section
+ size_t bytes = MIN(len, sect->Length - dst_off);
+ memcpy(sect->Data + dst_off, src_mem, bytes);
+ len -= bytes;
+ src_mem += bytes;
+
+ dst_off += bytes;
+ if( dst_off == sect->Length )
+ {
+ prevptr = §->Next;
+ sect = sect->Next;
+ dst_off = 0;
+ }
+ }
+
+ if( dst_len > 0 )
+ {
+ LOG("Deleting %i bytes at %i", dst_len, dst_off);
+ ASSERT(src_len == 0);
+ // Delete
+ while( dst_len > 0 )
+ {
+ if( !sect ) {
+ dst_buf->buf_size = dst_off;
+ dst_len = 0;
+ }
+ else if( sect->RelOfs > dst_off ) {
+ size_t bytes = MIN(dst_len, sect->RelOfs - dst_off);
+ dst_len -= bytes;
+ dst_buf->buf_size -= bytes;
+ sect->RelOfs -= bytes;
+ }
+ else if( dst_off == 0 && sect->Length <= dst_len ) {
+ // Remove entire section
+ dst_len -= sect->Length;
+ dst_buf->buf_size -= sect->Length;
+ *prevptr = sect->Next;
+ free(sect);
+
+ // Next block
+ sect = *prevptr;
+ }
+ else if( dst_off + dst_len >= sect->Length ) {
+ // block truncate
+ size_t bytes = MIN(dst_len, sect->Length - dst_off);
+ dst_len -= bytes;
+ dst_buf->buf_size -= bytes;
+ sect->Length -= bytes;
+
+ // Next block
+ prevptr = §->Next;
+ sect = sect->Next;
+ }
+ else {
+ // in-block removal (must be last)
+ ASSERTC(dst_off + dst_len, <, sect->Length);
+ size_t tail = sect->Length - (dst_off + dst_len);
+ memmove(sect->Data+dst_off, sect->Data+dst_off+dst_len, tail);
+ dst_buf->buf_size -= dst_len;
+ sect->Length -= dst_len;
+ dst_len = 0;
+ }
+ }
+ }
+ else if( src_len > 0 )
+ {
+ LOG("Inserting %i bytes", src_len);
+ ASSERT(dst_len == 0);
+ // Insert
+ if( !sect || sect->RelOfs > dst_off ) {
+ // Simple: Just add a new section
+ UDI_int_BufAddSect(src_len, dst_off, prevptr, src_mem, path_handle);
+ dst_buf->buf_size += src_len;
+ }
+ else if( sect->RelOfs + sect->Length == dst_off ) {
+ // End of block inserts
+ size_t avail = sect->Space - sect->Length;
+ if( avail ) {
+ size_t bytes = MIN(avail, src_len);
+ ASSERT(src_mem);
+ memcpy(sect->Data + sect->Length, src_mem, bytes);
+ src_mem += bytes;
+ src_len -= bytes;
+ }
+ if( src_len ) {
+ // New block(s)
+ UDI_int_BufAddSect(src_len, 0, prevptr, src_mem, path_handle);
+ }
+ dst_buf->buf_size += src_len;
+ }
+ else {
+ // Complex: Need to handle mid-section inserts
+ Log_Warning("UDI", "TODO: udi_buf_write - mid-section inserts");
+ }
+ }
+ else
+ {
+ LOG("No insert/delete, ovr only");
+ // No-op
+ }
+
+ LOG("dst_buf->size = %i", dst->buf.buf_size);
+ LEAVE('p', &dst->buf);
+ // HACK: udi_pio_trans calls this with a NULL cb, so handle that
+ if( callback ) {
+ callback(gcb, &dst->buf);
+ }
}
void udi_buf_read(
udi_size_t src_len,
void *dst_mem )
{
- UNIMPLEMENTED();
+ ENTER("psrc_buf isrc_off isrc_len pdst_mem",
+ src_buf, src_off, src_len, dst_mem);
+ tUDI_BufInt *src = (void*)src_buf;
+
+ tUDI_BufSect *sect = src->Sections;
+ while( src_len )
+ {
+ for( ; sect; sect = sect->Next )
+ {
+ LOG("%x <= %x <= +%x", sect->RelOfs, src_off, sect->Length);
+ if(sect->RelOfs >= src_off)
+ break;
+ if(sect->RelOfs + sect->Length > src_off)
+ break;
+ src_off -= sect->RelOfs + sect->Length;
+ }
+ if( !sect ) {
+ LOG("no section");
+ break;
+ }
+ if( src_off < sect->RelOfs ) {
+ size_t undef_len = MIN(src_len, sect->RelOfs - src_off);
+ LOG("%i undef", undef_len);
+ memset(dst_mem, 0xFF, undef_len);
+ dst_mem += undef_len;
+ src_len -= undef_len;
+ src_off += undef_len;
+ }
+ if( src_len == 0 )
+ break;
+ ASSERTC(src_off, >=, sect->RelOfs);
+ size_t ofs = src_off - sect->RelOfs;
+ size_t len = MIN(src_len, sect->Length - ofs);
+ LOG("%i data from %p + %i", len, sect->Data, ofs);
+ memcpy(dst_mem, sect->Data+ofs, len);
+ dst_mem += len;
+ src_len -= len;
+
+ src_off -= sect->RelOfs + sect->Length;
+ sect = sect->Next;
+ }
+ LEAVE('-');
}
-void udi_buf_free(udi_buf_t *buf)
+void udi_buf_free(udi_buf_t *buf_ptr)
{
- UNIMPLEMENTED();
+ if( buf_ptr )
+ {
+ tUDI_BufInt *buf = (void*)buf_ptr;
+
+ while( buf->Tags )
+ {
+ tUDI_BufTag *tag = buf->Tags;
+ buf->Tags = tag->Next;
+
+ free(tag);
+ }
+
+ while( buf->Sections )
+ {
+ tUDI_BufSect *sect = buf->Sections;
+ buf->Sections = sect->Next;
+
+ free(sect);
+ }
+
+ free(buf);
+ }
}
+
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au