/* This program is free software; you can redistribute it and/or modify it
under the terms of the license (GNU LGPL) which comes with this package. */
+/************************************************************************/
+/* C combines the power of assembler with the portability of assembler. */
+/************************************************************************/
+
#include "DataDesc/datadesc_private.h"
+GRAS_LOG_NEW_DEFAULT_SUBCATEGORY(convert,DataDesc);
/***
*** Table of all known architectures.
***/
const gras_arch_desc_t gras_arches[gras_arch_count] = {
- {"i386", 0, {1,2,4,4,8, 4,4, 4,8}},
- {"powerpc",1, {1,2,4,4,8, 4,4, 4,8}},
- {"sparc", 1, {1,2,4,8,8, 8,8, 4,8}}
+ {"little32", 0, {1,2,4,4,8, 4,4, 4,8}},
+ {"little64", 0, {1,2,4,8,8, 8,8, 4.8}},
+ {"big32", 1, {1,2,4,4,8, 4,4, 4,8}},
+ {"big64", 1, {1,2,4,8,8, 8,8, 4,8}}
};
const char *gras_datadesc_arch_name(int code) {
return gras_arches[code].name;
}
+/**
+ * Local function doing the grunt work
+ */
+static void
+gras_dd_resize_int(const void *source,
+ size_t sourceSize,
+ void *destination,
+ size_t destinationSize,
+ int signedType,
+ int lowOrderFirst);
+static void
+gras_dd_reverse_bytes(void *to,
+ const void *from,
+ size_t length);
+
+
/**
* gras_dd_convert_elm:
*
* Both pointers may be the same location if no resizing is needed.
*/
gras_error_t
-gras_dd_convert_elm(gras_datadesc_type_t *type,
+gras_dd_convert_elm(gras_datadesc_type_t *type, int count,
int r_arch,
void *src, void *dst) {
+ gras_dd_cat_scalar_t scal = type->category.scalar_data;
+ int cpt;
+ const void *r_data;
+ void *l_data;
+ size_t r_size, l_size;
+
+ gras_assert(type->category_code == e_gras_datadesc_type_cat_scalar);
+
+
+ r_size = type->size[r_arch];
+ l_size = type->size[GRAS_THISARCH];
+ DEBUG4("r_size=%d l_size=%d, src=%p dst=%p",
+ r_size,l_size,src,dst);
+
+ if (r_arch == GRAS_THISARCH) {
+// || scal.encoding == e_gras_dd_scalar_encoding_float) {
+ DEBUG0("No conversion needed");
+ return no_error;
+ }
+
+ r_size = type->size[r_arch];
+ l_size = type->size[GRAS_THISARCH];
+
+ if(r_size != l_size) {
+ for(cpt = 0, r_data = src, l_data = dst;
+ cpt < count;
+ cpt++,
+ r_data = (char *)r_data + r_size,
+ l_data = (char *)l_data + l_size) {
+
+ DEBUG3("Resize elm %d from %p to %p",cpt,r_data, l_data);
+ gras_dd_resize_int(r_data, r_size, l_data, l_size,
+ scal.encoding == e_gras_dd_scalar_encoding_sint,
+ gras_arches[GRAS_THISARCH].endian);
+ /* &&
+ gras_arches[r_arch].endian
+ != gras_arches[GRAS_THISARCH].endian);*/
+
+ }
+ src=dst; /* Make sure to reverse bytes on the right data */
+ }
+
+ if(gras_arches[r_arch].endian != gras_arches[GRAS_THISARCH].endian &&
+ (l_size * count) > 1) {
- if (r_arch != GRAS_THISARCH)
- RAISE_UNIMPLEMENTED;
+ for(cpt = 0, r_data=src, l_data=dst;
+ cpt < count;
+ cpt++,
+ r_data = (char *)r_data + l_size, /* resizing already done */
+ l_data = (char *)l_data + l_size) {
+
+ DEBUG1("Flip elm %d",cpt);
+ gras_dd_reverse_bytes(l_data, r_data, l_size);
+ }
+ }
return no_error;
}
+static void
+gras_dd_reverse_bytes(void *to,
+ const void *from,
+ size_t length) {
+
+ char charBegin;
+ const char *fromBegin;
+ const char *fromEnd;
+ char *toBegin;
+ char *toEnd;
+
+ for(fromBegin = (const char *)from,
+ fromEnd = fromBegin + length - 1,
+ toBegin = (char *)to,
+ toEnd = toBegin + length - 1;
+
+ fromBegin <= fromEnd;
+
+ fromBegin++, fromEnd--,
+ toBegin++, toEnd--) {
+
+ charBegin = *fromBegin;
+ *toBegin = *fromEnd;
+ *toEnd = charBegin;
+ }
+}
+
+/*
+ * Copies the integer value of size #sourceSize# stored in #source# to the
+ * #destinationSize#-long area #destination#. #signedType# indicates whether
+ * or not the source integer is signed; #lowOrderFirst# whether or not the
+ * bytes run least-significant to most-significant.
+ *
+ * It should be thread safe (operates on local variables and calls mem*)
+ */
+static void
+gras_dd_resize_int(const void *source,
+ size_t sourceSize,
+ void *destination,
+ size_t destinationSize,
+ int signedType,
+ int lowOrderFirst) {
+
+ unsigned char *destinationSign;
+ int padding;
+ int sizeChange = destinationSize - sourceSize;
+ unsigned char *sourceSign;
+
+ if(sizeChange == 0) {
+ memcpy(destination, source, destinationSize);
+ } else if(sizeChange < 0) {
+ /* Truncate high-order bytes. */
+ memcpy(destination,
+ lowOrderFirst?source:((char*)source-sizeChange),
+ destinationSize);
+ if(signedType) {
+ /* Make sure the high order bit of source and
+ * destination are the same */
+ destinationSign = lowOrderFirst ? ((unsigned char*)destination + destinationSize - 1) : (unsigned char*)destination;
+ sourceSign = lowOrderFirst ? ((unsigned char*)source + sourceSize - 1) : (unsigned char*)source;
+ if((*sourceSign > 127) != (*destinationSign > 127)) {
+ if(*sourceSign > 127)
+ *destinationSign += 128;
+ else
+ *destinationSign -= 128;
+ }
+ }
+ } else {
+ /* Pad with zeros or extend sign, as appropriate. */
+ if(!signedType)
+ padding = 0;
+ else {
+ sourceSign = lowOrderFirst ? ((unsigned char*)source + sourceSize - 1)
+ : (unsigned char*)source;
+ padding = (*sourceSign > 127) ? 0xff : 0;
+ }
+ memset(destination, padding, destinationSize);
+ memcpy(lowOrderFirst ? destination
+ : ((char *)destination + sizeChange),
+ source, sourceSize);
+ }
+}
+
+
/**
* gras_arch_selfid:
*
