Set datatypes on integer, decimal, and base64 nodes

4 files changed, 135 insertions, 39 deletions

diff --git a/include/serd/serd.h b/include/serd/serd.h
index 604b8032..c2c9d52d 100644
--- a/include/serd/serd.h
+++ b/include/serd/serd.h
@@ -561,15 +561,23 @@ serd_new_file_uri(SerdStringView path, SerdStringView hostname);
 
    @param d The value for the new node.
    @param frac_digits The maximum number of digits after the decimal place.
+   @param datatype Datatype of node, or NULL for xsd:decimal.
 */
 SERD_API
 SerdNode* SERD_ALLOCATED
-serd_new_decimal(double d, unsigned frac_digits);
+serd_new_decimal(double                        d,
+                 unsigned                      frac_digits,
+                 const SerdNode* SERD_NULLABLE datatype);
 
-/// Create a new node by serialising `i` into an xsd:integer string
+/**
+   Create a new node by serialising `i` into an xsd:integer string.
+
+   @param i Integer value to serialise.
+   @param datatype Datatype of node, or NULL for xsd:integer.
+*/
 SERD_API
 SerdNode* SERD_ALLOCATED
-serd_new_integer(int64_t i);
+serd_new_integer(int64_t i, const SerdNode* SERD_NULLABLE datatype);
 
 /**
    Create a node by serialising `buf` into an xsd:base64Binary string
@@ -580,10 +588,14 @@ serd_new_integer(int64_t i);
    @param buf Raw binary input data.
    @param size Size of `buf`.
    @param wrap_lines Wrap lines at 76 characters to conform to RFC 2045.
+   @param datatype Datatype of node, or NULL for xsd:base64Binary.
 */
 SERD_API
 SerdNode* SERD_ALLOCATED
-serd_new_blob(const void* SERD_NONNULL buf, size_t size, bool wrap_lines);
+serd_new_blob(const void* SERD_NONNULL      buf,
+              size_t                        size,
+              bool                          wrap_lines,
+              const SerdNode* SERD_NULLABLE datatype);
 
 /// Return a deep copy of `node`
 SERD_API
diff --git a/src/node.c b/src/node.c
index 09ff2b95..4728c39e 100644
--- a/src/node.c
+++ b/src/node.c
@@ -18,6 +18,7 @@
 
 #include "base64.h"
 #include "serd_internal.h"
+#include "static_nodes.h"
 #include "string_utils.h"
 
 #include "serd/serd.h"
@@ -48,8 +49,22 @@ serd_new_from_uri(const SerdURIView uri, const SerdURIView base);
 static size_t
 serd_node_pad_size(const size_t n_bytes)
 {
-  const size_t pad = serd_node_align - (n_bytes + 2) % serd_node_align;
-  return n_bytes + 2 + pad;
+  const size_t pad  = serd_node_align - (n_bytes + 2) % serd_node_align;
+  const size_t size = n_bytes + 2 + pad;
+  assert(size % serd_node_align == 0);
+  return size;
+}
+
+static const SerdNode*
+serd_node_meta_c(const SerdNode* node)
+{
+  return node + 1 + (serd_node_pad_size(node->n_bytes) / serd_node_align);
+}
+
+static SerdNode*
+serd_node_meta(SerdNode* node)
+{
+  return node + 1 + (serd_node_pad_size(node->n_bytes) / serd_node_align);
 }
 
 static const SerdNode*
@@ -383,21 +398,26 @@ serd_digits(double abs)
 }
 
 SerdNode*
-serd_new_decimal(double d, unsigned frac_digits)
+serd_new_decimal(double d, unsigned frac_digits, const SerdNode* datatype)
 {
   if (isnan(d) || isinf(d)) {
     return NULL;
   }
 
+  const SerdNode* type       = datatype ? datatype : &serd_xsd_decimal.node;
   const double    abs_d      = fabs(d);
   const unsigned  int_digits = serd_digits(abs_d);
   const size_t    len        = int_digits + frac_digits + 3;
-  SerdNode* const node       = serd_node_malloc(len, 0, SERD_LITERAL);
-  char* const     buf        = serd_node_buffer(node);
-  const double    int_part   = floor(abs_d);
+  const size_t    type_len   = serd_node_total_size(type);
+  const size_t    total_len  = len + type_len;
+
+  SerdNode* const node =
+    serd_node_malloc(total_len, SERD_HAS_DATATYPE, SERD_LITERAL);
 
   // Point s to decimal point location
-  char* s = buf + int_digits;
+  char* const  buf      = serd_node_buffer(node);
+  const double int_part = floor(abs_d);
+  char*        s        = buf + int_digits;
   if (d < 0.0) {
     *buf = '-';
     ++s;
@@ -435,19 +455,24 @@ serd_new_decimal(double d, unsigned frac_digits)
     }
   }
 
+  memcpy(serd_node_meta(node), type, type_len);
   return node;
 }
 
 SerdNode*
-serd_new_integer(int64_t i)
+serd_new_integer(int64_t i, const SerdNode* datatype)
 {
-  uint64_t       abs_i  = (i < 0) ? -i : i;
-  const unsigned digits = serd_digits((double)abs_i);
-  SerdNode*      node   = serd_node_malloc(digits + 2, 0, SERD_LITERAL);
-  char*          buf    = serd_node_buffer(node);
+  const SerdNode* type      = datatype ? datatype : &serd_xsd_integer.node;
+  uint64_t        abs_i     = (uint64_t)((i < 0) ? -i : i);
+  const unsigned  digits    = serd_digits((double)abs_i);
+  const size_t    type_len  = serd_node_total_size(type);
+  const size_t    total_len = digits + 2 + type_len;
+
+  SerdNode* node = serd_node_malloc(total_len, SERD_HAS_DATATYPE, SERD_LITERAL);
 
   // Point s to the end
-  char* s = buf + digits - 1;
+  char* buf = serd_node_buffer(node);
+  char* s   = buf + digits - 1;
   if (i < 0) {
     *buf = '-';
     ++s;
@@ -460,25 +485,35 @@ serd_new_integer(int64_t i)
     *s-- = (char)('0' + (abs_i % 10));
   } while ((abs_i /= 10) > 0);
 
+  memcpy(serd_node_meta(node), type, type_len);
   return node;
 }
 
 SerdNode*
-serd_new_blob(const void* buf, size_t size, bool wrap_lines)
+serd_new_blob(const void*     buf,
+              size_t          size,
+              bool            wrap_lines,
+              const SerdNode* datatype)
 {
   if (!buf || !size) {
     return NULL;
   }
 
-  const size_t len  = serd_base64_get_length(size, wrap_lines);
-  SerdNode*    node = serd_node_malloc(len + 1, 0, SERD_LITERAL);
-  uint8_t*     str  = (uint8_t*)serd_node_buffer(node);
+  const SerdNode* type      = datatype ? datatype : &serd_xsd_base64Binary.node;
+  const size_t    len       = serd_base64_get_length(size, wrap_lines);
+  const size_t    type_len  = serd_node_total_size(type);
+  const size_t    total_len = len + 1 + type_len;
 
+  SerdNode* const node =
+    serd_node_malloc(total_len, SERD_HAS_DATATYPE, SERD_LITERAL);
+
+  uint8_t* str = (uint8_t*)serd_node_buffer(node);
   if (serd_base64_encode(str, buf, size, wrap_lines)) {
     node->flags |= SERD_HAS_NEWLINE;
   }
 
   node->n_bytes = len;
+  memcpy(serd_node_meta(node), type, type_len);
   return node;
 }
 
@@ -521,15 +556,6 @@ serd_node_uri_view(const SerdNode* SERD_NONNULL node)
                                   : SERD_URI_NULL;
 }
 
-static const SerdNode*
-serd_node_meta_node(const SerdNode* node)
-{
-  const size_t len = serd_node_pad_size(node->n_bytes);
-  assert((intptr_t)node % serd_node_align == 0);
-  assert(len % serd_node_align == 0);
-  return node + 1 + (len / serd_node_align);
-}
-
 const SerdNode*
 serd_node_datatype(const SerdNode* node)
 {
@@ -537,7 +563,7 @@ serd_node_datatype(const SerdNode* node)
     return NULL;
   }
 
-  const SerdNode* const datatype = serd_node_meta_node(node);
+  const SerdNode* const datatype = serd_node_meta_c(node);
   assert(datatype->type == SERD_URI || datatype->type == SERD_CURIE);
   return datatype;
 }
@@ -549,7 +575,7 @@ serd_node_language(const SerdNode* node)
     return NULL;
   }
 
-  const SerdNode* const lang = serd_node_meta_node(node);
+  const SerdNode* const lang = serd_node_meta_c(node);
   assert(lang->type == SERD_LITERAL);
   return lang;
 }
diff --git a/src/static_nodes.h b/src/static_nodes.h
new file mode 100644
index 00000000..1b1fc062
--- /dev/null
+++ b/src/static_nodes.h
@@ -0,0 +1,38 @@
+/*
+  Copyright 2019-2020 David Robillard <d@drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef SERD_STATIC_NODES_H
+#define SERD_STATIC_NODES_H
+
+#include "serd/serd.h"
+
+#include "node.h"
+#include "serd_internal.h"
+
+typedef struct StaticNode {
+  SerdNode node;
+  char     buf[sizeof(NS_XSD "base64Binary")];
+} StaticNode;
+
+#define DEFINE_XSD_NODE(name)                 \
+  static const StaticNode serd_xsd_##name = { \
+    {sizeof(NS_XSD #name) - 1, 0, SERD_URI}, NS_XSD #name};
+
+DEFINE_XSD_NODE(base64Binary)
+DEFINE_XSD_NODE(decimal)
+DEFINE_XSD_NODE(integer)
+
+#endif // SERD_STATIC_NODES_H
diff --git a/test/test_node.c b/test/test_node.c
index eeafe5fc..93a408d6 100644
--- a/test/test_node.c
+++ b/test/test_node.c
@@ -34,6 +34,8 @@
 #  define NAN (INFINITY - INFINITY)
 #endif
 
+#define NS_XSD "http://www.w3.org/2001/XMLSchema#"
+
 static void
 test_strtod(double dbl, double max_delta)
 {
@@ -91,14 +93,23 @@ test_double_to_node(void)
                                  NULL};
 
   for (size_t i = 0; i < sizeof(dbl_test_nums) / sizeof(double); ++i) {
-    SerdNode*   node     = serd_new_decimal(dbl_test_nums[i], 8);
+    SerdNode*   node     = serd_new_decimal(dbl_test_nums[i], 8, NULL);
     const char* node_str = node ? serd_node_string(node) : NULL;
     const bool  pass     = (node_str && dbl_test_strs[i])
                              ? !strcmp(node_str, dbl_test_strs[i])
                              : (node_str == dbl_test_strs[i]);
     assert(pass);
-    assert(!node || serd_node_length(node) == strlen(node_str));
-    serd_node_free(node);
+
+    const size_t len = node_str ? strlen(node_str) : 0;
+    assert((!node && len == 0) || serd_node_length(node) == len);
+
+    if (node) {
+      const SerdNode* const datatype = serd_node_datatype(node);
+      assert(datatype);
+      assert(!dbl_test_strs[i] ||
+             !strcmp(serd_node_string(datatype), NS_XSD "decimal"));
+      serd_node_free(node);
+    }
   }
 }
 
@@ -111,10 +122,15 @@ test_integer_to_node(void)
     "0", "0", "-23", "23", "-12340", "1000", "-1000"};
 
   for (size_t i = 0; i < sizeof(int_test_nums) / sizeof(double); ++i) {
-    SerdNode*   node     = serd_new_integer(int_test_nums[i]);
+    SerdNode*   node     = serd_new_integer(int_test_nums[i], NULL);
     const char* node_str = serd_node_string(node);
     assert(!strcmp(node_str, int_test_strs[i]));
-    assert(serd_node_length(node) == strlen(node_str));
+    const size_t len = strlen(node_str);
+    assert(serd_node_length(node) == len);
+
+    const SerdNode* const datatype = serd_node_datatype(node);
+    assert(datatype);
+    assert(!strcmp(serd_node_string(datatype), NS_XSD "integer"));
     serd_node_free(node);
   }
 }
@@ -122,7 +138,7 @@ test_integer_to_node(void)
 static void
 test_blob_to_node(void)
 {
-  assert(!serd_new_blob(&SERD_URI_NULL, 0, false));
+  assert(!serd_new_blob(&SERD_URI_NULL, 0, false, NULL));
 
   for (size_t size = 1; size < 256; ++size) {
     uint8_t* const data = (uint8_t*)malloc(size);
@@ -131,7 +147,7 @@ test_blob_to_node(void)
     }
 
     size_t      out_size = 0;
-    SerdNode*   blob     = serd_new_blob(data, size, size % 5);
+    SerdNode*   blob     = serd_new_blob(data, size, size % 5, NULL);
     const char* blob_str = serd_node_string(blob);
     uint8_t*    out =
       (uint8_t*)serd_base64_decode(blob_str, serd_node_length(blob), &out_size);
@@ -143,6 +159,10 @@ test_blob_to_node(void)
       assert(out[i] == data[i]);
     }
 
+    const SerdNode* const datatype = serd_node_datatype(blob);
+    assert(datatype);
+    assert(!strcmp(serd_node_string(datatype), NS_XSD "base64Binary"));
+
     serd_node_free(blob);
     serd_free(out);
     free(data);