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Date:      Tue, 03 Sep 2019 14:06:13 -0000
From:      "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net>
To:        Kyle Evans <kevans@freebsd.org>
Cc:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org
Subject:   Re: svn commit: r345880 - stable/12/usr.bin/dtc
Message-ID:  <201904041736.x34HaFb3034355@gndrsh.dnsmgr.net>
In-Reply-To: <201904041726.x34HQZrp034444@repo.freebsd.org>

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> Author: kevans
> Date: Thu Apr  4 17:26:35 2019
> New Revision: 345880
> URL: https://svnweb.freebsd.org/changeset/base/345880
> 
> Log:
>   dtc(1): Update to 1a79f5f26631

Is there someway to update the quality of this pointer?
When googled it tends to loop back to FreeBSD.org stuff.

Thanks,
Rod

>   Highlights:
>   - Bugfix for order in which /delete-node/ and /delete-property/ are
>     processed [0]
>   - /omit-if-no-ref/ support has been added (used only by U-Boot at this
>     point, in theory)
>   - GPL dtc compat version bumped to 1.4.7
>   - Various small fixes and compatibility improvements
> 
> Modified:
>   stable/12/usr.bin/dtc/dtb.cc
>   stable/12/usr.bin/dtc/dtb.hh
>   stable/12/usr.bin/dtc/dtc.1
>   stable/12/usr.bin/dtc/dtc.cc
>   stable/12/usr.bin/dtc/fdt.cc
>   stable/12/usr.bin/dtc/fdt.hh
>   stable/12/usr.bin/dtc/input_buffer.cc
>   stable/12/usr.bin/dtc/util.hh
> Directory Properties:
>   stable/12/   (props changed)
> 
> Modified: stable/12/usr.bin/dtc/dtb.cc
> ==============================================================================
> --- stable/12/usr.bin/dtc/dtb.cc	Thu Apr  4 17:24:57 2019	(r345879)
> +++ stable/12/usr.bin/dtc/dtb.cc	Thu Apr  4 17:26:35 2019	(r345880)
> @@ -37,9 +37,33 @@
>  #include <inttypes.h>
>  #include <stdio.h>
>  #include <unistd.h>
> +#include <errno.h>
>  
>  using std::string;
>  
> +namespace {
> +
> +void write(dtc::byte_buffer &buffer, int fd)
> +{
> +	size_t size = buffer.size();
> +	uint8_t *data = buffer.data();
> +	while (size > 0)
> +	{
> +		ssize_t r = ::write(fd, data, size);
> +		if (r >= 0)
> +		{
> +			data += r;
> +			size -= r;
> +		}
> +		else if (errno != EAGAIN)
> +		{
> +			fprintf(stderr, "Writing to file failed\n");
> +			exit(-1);
> +		}
> +	}
> +}
> +}
> +
>  namespace dtc
>  {
>  namespace dtb
> @@ -90,8 +114,7 @@ binary_writer::write_data(uint64_t v)
>  void
>  binary_writer::write_to_file(int fd)
>  {
> -	// FIXME: Check return
> -	write(fd, buffer.data(), buffer.size());
> +	write(buffer, fd);
>  }
>  
>  uint32_t
> @@ -222,8 +245,7 @@ asm_writer::write_data(uint64_t v)
>  void
>  asm_writer::write_to_file(int fd)
>  {
> -	// FIXME: Check return
> -	write(fd, buffer.data(), buffer.size());
> +	write(buffer, fd);
>  }
>  
>  uint32_t
> 
> Modified: stable/12/usr.bin/dtc/dtb.hh
> ==============================================================================
> --- stable/12/usr.bin/dtc/dtb.hh	Thu Apr  4 17:24:57 2019	(r345879)
> +++ stable/12/usr.bin/dtc/dtb.hh	Thu Apr  4 17:26:35 2019	(r345880)
> @@ -109,6 +109,8 @@ inline const char *token_type_name(token_type t)
>  			return "FDT_END";
>  	}
>  	assert(0);
> +	// Not reached.
> +	return nullptr;
>  }
>  
>  /**
> 
> Modified: stable/12/usr.bin/dtc/dtc.1
> ==============================================================================
> --- stable/12/usr.bin/dtc/dtc.1	Thu Apr  4 17:24:57 2019	(r345879)
> +++ stable/12/usr.bin/dtc/dtc.1	Thu Apr  4 17:26:35 2019	(r345880)
> @@ -30,7 +30,7 @@
>  .\"
>  .\" $FreeBSD$
>  .\"/
> -.Dd April 7, 2018
> +.Dd March 27, 2019
>  .Dt DTC 1
>  .Os
>  .Sh NAME
> @@ -304,7 +304,18 @@ Overlay blobs can be applied at boot time by setting
>  in
>  .Xr loader.conf 5 .
>  Multiple overlays may be specified, and they will be applied in the order given.
> -.El
> +.Sh NODE OMISSION
> +This utility supports the
> +.Va /omit-if-no-ref/
> +statement to mark nodes for omission if they are ultimately not referenced
> +elsewhere in the device tree.
> +This may be used in more space-constrained environments to remove nodes that may
> +not be applicable to the specific device the tree is being compiled for.
> +.Pp
> +When the
> +.Fl @
> +flag is used to write symbols, nodes with labels will be considered referenced
> +and will not be removed from the tree.
>  .Sh EXAMPLES
>  The command:
>  .Pp
> @@ -403,7 +414,11 @@ A dtc tool first appeared in
>  This version of the tool first appeared in
>  .Fx 10.0 .
>  .Sh AUTHORS
> -.An David T. Chisnall
> +.Nm
> +was written by
> +.An David T. Chisnall .
> +Some features were added later by
> +.An Kyle Evans .
>  .Pp
>  Note: The fact that the tool and the author share the same initials is entirely
>  coincidental.
> 
> Modified: stable/12/usr.bin/dtc/dtc.cc
> ==============================================================================
> --- stable/12/usr.bin/dtc/dtc.cc	Thu Apr  4 17:24:57 2019	(r345879)
> +++ stable/12/usr.bin/dtc/dtc.cc	Thu Apr  4 17:26:35 2019	(r345880)
> @@ -38,6 +38,7 @@
>  #include <limits.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> +#include <string.h>
>  #include <time.h>
>  #include <unistd.h>
>  
> @@ -65,7 +66,7 @@ int version_minor_compatible = 4;
>   * The current patch level of the tool.
>   */
>  int version_patch = 0;
> -int version_patch_compatible = 0;
> +int version_patch_compatible = 7;
>  
>  void usage(const string &argv0)
>  {
> @@ -105,7 +106,7 @@ main(int argc, char **argv)
>  	bool debug_mode = false;
>  	auto write_fn = &device_tree::write_binary;
>  	auto read_fn = &device_tree::parse_dts;
> -	uint32_t boot_cpu;
> +	uint32_t boot_cpu = 0;
>  	bool boot_cpu_specified = false;
>  	bool keep_going = false;
>  	bool sort = false;
> 
> Modified: stable/12/usr.bin/dtc/fdt.cc
> ==============================================================================
> --- stable/12/usr.bin/dtc/fdt.cc	Thu Apr  4 17:24:57 2019	(r345879)
> +++ stable/12/usr.bin/dtc/fdt.cc	Thu Apr  4 17:26:35 2019	(r345880)
> @@ -46,6 +46,7 @@
>  #include <libgen.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> +#include <string.h>
>  #include <unistd.h>
>  #include <sys/types.h>
>  #include <sys/stat.h>
> @@ -491,6 +492,7 @@ property::property(text_input_buffer &input,
>  					break;
>  				}
>  			}
> +			[[fallthrough]];
>  			default:
>  				input.parse_error("Invalid property value.");
>  				valid = false;
> @@ -622,6 +624,7 @@ property_value::try_to_merge(property_value &other)
>  			return false;
>  		case EMPTY:
>  			*this = other;
> +			[[fallthrough]];
>  		case STRING:
>  		case STRING_LIST:
>  		case CROSS_REFERENCE:
> @@ -846,6 +849,7 @@ node_ptr node::create_special_node(const string &name,
>  }
>  
>  node::node(text_input_buffer &input,
> +           device_tree &tree,
>             string &&n,
>             std::unordered_set<string> &&l,
>             string &&a,
> @@ -862,6 +866,9 @@ node::node(text_input_buffer &input,
>  		// flag set if we find any characters that are only in
>  		// the property name character set, not the node 
>  		bool is_property = false;
> +		// flag set if our node is marked as /omit-if-no-ref/ to be
> +		// garbage collected later if nothing references it
> +		bool marked_omit_if_no_ref = false;
>  		string child_name, child_address;
>  		std::unordered_set<string> child_labels;
>  		auto parse_delete = [&](const char *expected, bool at)
> @@ -908,6 +915,12 @@ node::node(text_input_buffer &input,
>  			}
>  			continue;
>  		}
> +		if (input.consume("/omit-if-no-ref/"))
> +		{
> +			input.next_token();
> +			marked_omit_if_no_ref = true;
> +			tree.set_needs_garbage_collection();
> +		}
>  		child_name = parse_name(input, is_property,
>  				"Expected property or node name");
>  		while (input.consume(':'))
> @@ -943,10 +956,11 @@ node::node(text_input_buffer &input,
>  		}
>  		else if (!is_property && *input == ('{'))
>  		{
> -			node_ptr child = node::parse(input, std::move(child_name),
> +			node_ptr child = node::parse(input, tree, std::move(child_name),
>  					std::move(child_labels), std::move(child_address), defines);
>  			if (child)
>  			{
> +				child->omit_if_no_ref = marked_omit_if_no_ref;
>  				children.push_back(std::move(child));
>  			}
>  			else
> @@ -998,12 +1012,14 @@ node::sort()
>  
>  node_ptr
>  node::parse(text_input_buffer &input,
> +            device_tree &tree,
>              string &&name,
>              string_set &&label,
>              string &&address,
>              define_map *defines)
>  {
>  	node_ptr n(new node(input,
> +	                    tree,
>  	                    std::move(name),
>  	                    std::move(label),
>  	                    std::move(address),
> @@ -1046,6 +1062,30 @@ node::merge_node(node_ptr &other)
>  	{
>  		labels.insert(l);
>  	}
> +	children.erase(std::remove_if(children.begin(), children.end(),
> +			[&](const node_ptr &p) {
> +				string full_name = p->name;
> +				if (p->unit_address != string())
> +				{
> +					full_name += '@';
> +					full_name += p->unit_address;
> +				}
> +				if (other->deleted_children.count(full_name) > 0)
> +				{
> +					other->deleted_children.erase(full_name);
> +					return true;
> +				}
> +				return false;
> +			}), children.end());
> +	props.erase(std::remove_if(props.begin(), props.end(),
> +			[&](const property_ptr &p) {
> +				if (other->deleted_props.count(p->get_key()) > 0)
> +				{
> +					other->deleted_props.erase(p->get_key());
> +					return true;
> +				}
> +				return false;
> +			}), props.end());
>  	// Note: this is an O(n*m) operation.  It might be sensible to
>  	// optimise this if we find that there are nodes with very
>  	// large numbers of properties, but for typical usage the
> @@ -1085,30 +1125,6 @@ node::merge_node(node_ptr &other)
>  			children.push_back(std::move(c));
>  		}
>  	}
> -	children.erase(std::remove_if(children.begin(), children.end(),
> -			[&](const node_ptr &p) {
> -				string full_name = p->name;
> -				if (p->unit_address != string())
> -				{
> -					full_name += '@';
> -					full_name += p->unit_address;
> -				}
> -				if (other->deleted_children.count(full_name) > 0)
> -				{
> -					other->deleted_children.erase(full_name);
> -					return true;
> -				}
> -				return false;
> -			}), children.end());
> -	props.erase(std::remove_if(props.begin(), props.end(),
> -			[&](const property_ptr &p) {
> -				if (other->deleted_props.count(p->get_key()) > 0)
> -				{
> -					other->deleted_props.erase(p->get_key());
> -					return true;
> -				}
> -				return false;
> -			}), props.end());
>  }
>  
>  void
> @@ -1187,6 +1203,7 @@ device_tree::collect_names_recursive(node_ptr &n, node
>  			{
>  				node_names.insert(std::make_pair(name, n.get()));
>  				node_paths.insert(std::make_pair(name, path));
> +				ordered_node_paths.push_back({name, path});
>  			}
>  			else
>  			{
> @@ -1243,6 +1260,7 @@ device_tree::collect_names()
>  	node_path p;
>  	node_names.clear();
>  	node_paths.clear();
> +	ordered_node_paths.clear();
>  	cross_references.clear();
>  	fixups.clear();
>  	collect_names_recursive(root, p);
> @@ -1353,7 +1371,6 @@ device_tree::resolve_cross_references(uint32_t &phandl
>  		return node::VISIT_RECURSE;
>  	}, nullptr);
>  	assert(sorted_phandles.size() == fixups.size());
> -
>  	for (auto &i : sorted_phandles)
>  	{
>  		string target_name = i.get().val.string_data;
> @@ -1441,7 +1458,104 @@ device_tree::resolve_cross_references(uint32_t &phandl
>  	}
>  }
>  
> +bool
> +device_tree::garbage_collect_marked_nodes()
> +{
> +	std::unordered_set<node*> previously_referenced_nodes;
> +	std::unordered_set<node*> newly_referenced_nodes;
>  
> +	auto mark_referenced_nodes_used = [&](node &n)
> +	{
> +		for (auto &p : n.properties())
> +		{
> +			for (auto &v : *p)
> +			{
> +				if (v.is_phandle())
> +				{
> +					node *nx = node_names[v.string_data];
> +					if (nx == nullptr)
> +					{
> +						// Try it again, but as a path
> +						for (auto &s : node_paths)
> +						{
> +							if (v.string_data == s.second.to_string())
> +							{
> +								nx = node_names[s.first];
> +								break;
> +							}
> +						}
> +					}
> +					if (nx == nullptr)
> +					{
> +						// Couldn't resolve this one?
> +						continue;
> +					}
> +					// Only mark those currently unmarked
> +					if (!nx->used)
> +					{
> +							nx->used = 1;
> +							newly_referenced_nodes.insert(nx);
> +					}
> +				}
> +			}
> +		}
> +	};
> +
> +	// Seed our referenced nodes with those that have been seen by a node that
> +	// either will not be omitted if it's unreferenced or has a symbol.
> +	// Nodes with symbols are explicitly not garbage collected because they may
> +	// be expected for referencing by an overlay, and we do not want surprises
> +	// there.
> +	root->visit([&](node &n, node *) {
> +		if (!n.omit_if_no_ref || (write_symbols && !n.labels.empty()))
> +		{
> +			mark_referenced_nodes_used(n);
> +		}
> +		// Recurse as normal
> +		return node::VISIT_RECURSE;
> +	}, nullptr);
> +
> +	while (!newly_referenced_nodes.empty())
> +	{
> +			previously_referenced_nodes = std::move(newly_referenced_nodes);
> +			for (auto *n : previously_referenced_nodes)
> +			{
> +				mark_referenced_nodes_used(*n);
> +			}
> +	}
> +
> +	previously_referenced_nodes.clear();
> +	bool children_deleted = false;
> +
> +	// Delete
> +	root->visit([&](node &n, node *) {
> +		bool gc_children = false;
> +
> +		for (auto &cn : n.child_nodes())
> +		{
> +				if (cn->omit_if_no_ref && !cn->used)
> +				{
> +					gc_children = true;
> +					break;
> +				}
> +		}
> +
> +		if (gc_children)
> +		{
> +			children_deleted = true;
> +			n.delete_children_if([](node_ptr &nx) {
> +				return (nx->omit_if_no_ref && !nx->used);
> +			});
> +
> +			return node::VISIT_CONTINUE;
> +		}
> +
> +		return node::VISIT_RECURSE;
> +	}, nullptr);
> +
> +	return children_deleted;
> +}
> +
>  void
>  device_tree::parse_file(text_input_buffer &input,
>                          std::vector<node_ptr> &roots,
> @@ -1486,7 +1600,7 @@ device_tree::parse_file(text_input_buffer &input,
>  		if (input.consume('/'))
>  		{
>  			input.next_token();
> -			n = node::parse(input, string(), string_set(), string(), &defines);
> +			n = node::parse(input, *this, string(), string_set(), string(), &defines);
>  		}
>  		else if (input.consume('&'))
>  		{
> @@ -1507,7 +1621,7 @@ device_tree::parse_file(text_input_buffer &input,
>  				name = input.parse_node_name();
>  			}
>  			input.next_token();
> -			n = node::parse(input, std::move(name), string_set(), string(), &defines);
> +			n = node::parse(input, *this, std::move(name), string_set(), string(), &defines);
>  			n->name_is_path_reference = name_is_path_reference;
>  		}
>  		else
> @@ -1890,6 +2004,12 @@ device_tree::parse_dts(const string &fn, FILE *depfile
>  		}
>  	}
>  	collect_names();
> +	// Return value indicates whether we've dirtied the tree or not and need to
> +	// recollect names
> +	if (garbage_collect && garbage_collect_marked_nodes())
> +	{
> +		collect_names();
> +	}
>  	uint32_t phandle = 1;
>  	// If we're writing symbols, go ahead and assign phandles to the entire
>  	// tree. We'll do this before we resolve cross references, just to keep
> @@ -1906,8 +2026,14 @@ device_tree::parse_dts(const string &fn, FILE *depfile
>  		// referenced by other plugins, so we create a __symbols__ node inside
>  		// the root that contains mappings (properties) from label names to
>  		// paths.
> -		for (auto &s : node_paths)
> +		for (auto i=ordered_node_paths.rbegin(), e=ordered_node_paths.rend() ; i!=e ; ++i)
>  		{
> +			auto &s = *i;
> +			if (node_paths.find(s.first) == node_paths.end())
> +			{
> +				// Erased node, skip it.
> +				continue;
> +			}
>  			property_value v;
>  			v.string_data = s.second.to_string();
>  			v.type = property_value::STRING;
> @@ -1986,19 +2112,23 @@ device_tree::parse_dts(const string &fn, FILE *depfile
>  				{
>  					if (c->name == p.first)
>  					{
> -						string path = p.first;
> -						if (!(p.second.empty()))
> +						if (c->unit_address == p.second)
>  						{
> -							path += '@';
> -							path += p.second;
> +							n = c.get();
> +							found = true;
> +							break;
>  						}
> -						n->add_child(node::create_special_node(path, symbols));
> -						n = (--n->child_end())->get();
>  					}
>  				}
>  				if (!found)
>  				{
> -					n->add_child(node::create_special_node(p.first, symbols));
> +					string path = p.first;
> +					if (!(p.second.empty()))
> +					{
> +						path += '@';
> +						path += p.second;
> +					}
> +					n->add_child(node::create_special_node(path, symbols));
>  					n = (--n->child_end())->get();
>  				}
>  			}
> 
> Modified: stable/12/usr.bin/dtc/fdt.hh
> ==============================================================================
> --- stable/12/usr.bin/dtc/fdt.hh	Thu Apr  4 17:24:57 2019	(r345879)
> +++ stable/12/usr.bin/dtc/fdt.hh	Thu Apr  4 17:26:35 2019	(r345880)
> @@ -56,6 +56,7 @@ namespace fdt
>  {
>  class property;
>  class node;
> +class device_tree;
>  /**
>   * Type for (owned) pointers to properties.
>   */
> @@ -418,6 +419,17 @@ class node
>  	 */
>  	std::string unit_address;
>  	/**
> +	 * A flag indicating that this node has been marked /omit-if-no-ref/ and
> +	 * will be omitted if it is not referenced, either directly or indirectly,
> +	 * by a node that is not similarly denoted.
> +	 */
> +	bool omit_if_no_ref = false;
> +	/**
> +	 * A flag indicating that this node has been referenced, either directly
> +	 * or indirectly, by a node that is not marked /omit-if-no-ref/.
> +	 */
> +	bool used = false;
> +	/**
>  	 * The type for the property vector.
>  	 */
>  	typedef std::vector<property_ptr> property_vector;
> @@ -507,6 +519,7 @@ class node
>  	 * already been parsed.
>  	 */
>  	node(text_input_buffer &input,
> +	     device_tree &tree,
>  	     std::string &&n,
>  	     std::unordered_set<std::string> &&l,
>  	     std::string &&a,
> @@ -603,6 +616,7 @@ class node
>  	 * have been parsed.
>  	 */
>  	static node_ptr parse(text_input_buffer &input,
> +	                      device_tree &tree,
>  	                      std::string &&name,
>  	                      std::unordered_set<std::string> &&label=std::unordered_set<std::string>(),
>  	                      std::string &&address=std::string(),
> @@ -640,6 +654,13 @@ class node
>  		children.push_back(std::move(n));
>  	}
>  	/**
> +	 * Deletes any children from this node.
> +	 */
> +	inline void delete_children_if(bool (*predicate)(node_ptr &))
> +	{
> +		children.erase(std::remove_if(children.begin(), children.end(), predicate), children.end());
> +	}
> +	/**
>  	 * Merges a node into this one.  Any properties present in both are
>  	 * overridden, any properties present in only one are preserved.
>  	 */
> @@ -710,6 +731,11 @@ class device_tree
>  	 */
>  	bool valid = true;
>  	/**
> +	 * Flag indicating that this tree requires garbage collection.  This will be
> +	 * set to true if a node marked /omit-if-no-ref/ is encountered.
> +	 */
> +	bool garbage_collect = false;
> +	/**
>  	 * Type used for memory reservations.  A reservation is two 64-bit
>  	 * values indicating a base address and length in memory that the
>  	 * kernel should not use.  The high 32 bits are ignored on 32-bit
> @@ -736,6 +762,12 @@ class device_tree
>  	 */
>  	std::unordered_map<std::string, node_path> node_paths;
>  	/**
> +	 * All of the elements in `node_paths` in the order that they were
> +	 * created.  This is used for emitting the `__symbols__` section, where
> +	 * we want to guarantee stable ordering.
> +	 */
> +	std::vector<std::pair<std::string, node_path>> ordered_node_paths;
> +	/**
>  	 * A collection of property values that are references to other nodes.
>  	 * These should be expanded to the full path of their targets.
>  	 */
> @@ -847,10 +879,20 @@ class device_tree
>  	 * node must have their values replaced by either the node path or
>  	 * phandle value.  The phandle parameter holds the next phandle to be
>  	 * assigned, should the need arise.  It will be incremented upon each
> -	 * assignment of a phandle.
> +	 * assignment of a phandle.  Garbage collection of unreferenced nodes
> +	 * marked for "delete if unreferenced" will also occur here.
>  	 */
>  	void resolve_cross_references(uint32_t &phandle);
>  	/**
> +	 * Garbage collects nodes that have been marked /omit-if-no-ref/ and do not
> +	 * have any references to them from nodes that are similarly marked.  This
> +	 * is a fairly expensive operation.  The return value indicates whether the
> +	 * tree has been dirtied as a result of this operation, so that the caller
> +	 * may take appropriate measures to bring the device tree into a consistent
> +	 * state as needed.
> +	 */
> +	bool garbage_collect_marked_nodes();
> +	/**
>  	 * Parses a dts file in the given buffer and adds the roots to the parsed
>  	 * set.  The `read_header` argument indicates whether the header has
>  	 * already been read.  Some dts files place the header in an include,
> @@ -931,6 +973,14 @@ class device_tree
>  	inline bool is_valid()
>  	{
>  		return valid;
> +	}
> +	/**
> +	 * Mark this tree as needing garbage collection, because an /omit-if-no-ref/
> +	 * node has been encountered.
> +	 */
> +	void set_needs_garbage_collection()
> +	{
> +		garbage_collect = true;
>  	}
>  	/**
>  	 * Sets the format for writing phandle properties.
> 
> Modified: stable/12/usr.bin/dtc/input_buffer.cc
> ==============================================================================
> --- stable/12/usr.bin/dtc/input_buffer.cc	Thu Apr  4 17:24:57 2019	(r345879)
> +++ stable/12/usr.bin/dtc/input_buffer.cc	Thu Apr  4 17:26:35 2019	(r345880)
> @@ -126,7 +126,7 @@ mmap_input_buffer::~mmap_input_buffer()
>  {
>  	if (buffer != 0)
>  	{
> -		munmap((void*)buffer, size);
> +		munmap(const_cast<char*>(buffer), size);
>  	}
>  }
>  
> 
> Modified: stable/12/usr.bin/dtc/util.hh
> ==============================================================================
> --- stable/12/usr.bin/dtc/util.hh	Thu Apr  4 17:24:57 2019	(r345879)
> +++ stable/12/usr.bin/dtc/util.hh	Thu Apr  4 17:26:35 2019	(r345880)
> @@ -47,6 +47,38 @@
>  #endif
>  #endif
>  
> +#ifdef MISSING_DIGITTOINT
> +namespace
> +{
> +	/**
> +	 * Glibc doesn't have a definition of digittoint, so provide our own.
> +	 */
> +	inline int digittoint(int c)
> +	{
> +		switch (c)
> +		{
> +			default:
> +			case '0': return 0;
> +			case '1': return 1;
> +			case '2': return 2;
> +			case '3': return 3;
> +			case '4': return 4;
> +			case '5': return 5;
> +			case '6': return 6;
> +			case '7': return 7;
> +			case '8': return 8;
> +			case '9': return 9;
> +			case 'a': return 10;
> +			case 'b': return 11;
> +			case 'c': return 12;
> +			case 'd': return 13;
> +			case 'e': return 14;
> +			case 'f': return 15;
> +		}
> +	}
> +}
> +#endif
> +
>  namespace dtc {
>  
>  /**
> 
> 

-- 
Rod Grimes                                                 rgrimes@freebsd.org





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