cloud-email/cryptography - python cryptography

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path: root/src/_cffi_src/commoncrypto/seckeychain.py

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author	Alex Gaynor <alex.gaynor@gmail.com>	2015-12-19 20:49:15 -0500
committer	Alex Gaynor <alex.gaynor@gmail.com>	2015-12-19 20:49:15 -0500
commit	a2293c813d2645ac1cdb9ee17da247e2e67fab20 (patch)
tree	c0a955e16edd37b8336ccd19b17aa81bb985adf8 /src/_cffi_src/commoncrypto/seckeychain.py
parent	edfd8f83de5f9f6d6a71ff7e6705a7676abf8c5a (diff)
download	cryptography-a2293c813d2645ac1cdb9ee17da247e2e67fab20.tar.gz cryptography-a2293c813d2645ac1cdb9ee17da247e2e67fab20.tar.bz2 cryptography-a2293c813d2645ac1cdb9ee17da247e2e67fab20.zip

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/*
 *  yosys -- Yosys Open SYnthesis Suite
 *
 *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
 *
 *  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.
 *
 *  THE 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.
 *
 *  ---
 *
 *  This is the AST frontend library.
 *
 *  The AST frontend library is not a frontend on it's own but provides a
 *  generic abstract syntax tree (AST) abstraction for HDL code and can be
 *  used by HDL frontends. See "ast.h" for an overview of the API and the
 *  Verilog frontend for an usage example.
 *
 */

#include "kernel/yosys.h"
#include "libs/sha1/sha1.h"
#include "ast.h"

YOSYS_NAMESPACE_BEGIN

using namespace AST;
using namespace AST_INTERNAL;

// instanciate global variables (public API)
namespace AST {
	std::string current_filename;
	void (*set_line_num)(int) = NULL;
	int (*get_line_num)() = NULL;
}

// instanciate global variables (private API)
namespace AST_INTERNAL {
	bool flag_dump_ast1, flag_dump_ast2, flag_dump_vlog, flag_nolatches, flag_nomeminit, flag_nomem2reg, flag_mem2reg, flag_lib, flag_noopt, flag_icells, flag_autowire;
	AstNode *current_ast, *current_ast_mod;
	std::map<std::string, AstNode*> current_scope;
	const dict<RTLIL::SigBit, RTLIL::SigBit> *genRTLIL_subst_ptr = NULL;
	RTLIL::SigSpec ignoreThisSignalsInInitial;
	AstNode *current_always, *current_top_block, *current_block, *current_block_child;
	AstModule *current_module;
}

// convert node types to string
std::string AST::type2str(AstNodeType type)
{
	switch (type)
	{
#define X(_item) case _item: return #_item;
	X(AST_NONE)
	X(AST_DESIGN)
	X(AST_MODULE)
	X(AST_TASK)
	X(AST_FUNCTION)
	X(AST_DPI_FUNCTION)
	X(AST_WIRE)
	X(AST_MEMORY)
	X(AST_AUTOWIRE)
	X(AST_PARAMETER)
	X(AST_LOCALPARAM)
	X(AST_DEFPARAM)
	X(AST_PARASET)
	X(AST_ARGUMENT)
	X(AST_RANGE)
	X(AST_MULTIRANGE)
	X(AST_CONSTANT)
	X(AST_REALVALUE)
	X(AST_CELLTYPE)
	X(AST_IDENTIFIER)
	X(AST_PREFIX)
	X(AST_ASSERT)
	X(AST_ASSUME)
	X(AST_FCALL)
	X(AST_TO_BITS)
	X(AST_TO_SIGNED)
	X(AST_TO_UNSIGNED)
	X(AST_CONCAT)
	X(AST_REPLICATE)
	X(AST_BIT_NOT)
	X(AST_BIT_AND)
	X(AST_BIT_OR)
	X(AST_BIT_XOR)
	X(AST_BIT_XNOR)
	X(AST_REDUCE_AND)
	X(AST_REDUCE_OR)
	X(AST_REDUCE_XOR)
	X(AST_REDUCE_XNOR)
	X(AST_REDUCE_BOOL)
	X(AST_SHIFT_LEFT)
	X(AST_SHIFT_RIGHT)
	X(AST_SHIFT_SLEFT)
	X(AST_SHIFT_SRIGHT)
	X(AST_LT)
	X(AST_LE)
	X(AST_EQ)
	X(AST_NE)
	X(AST_EQX)
	X(AST_NEX)
	X(AST_GE)
	X(AST_GT)
	X(AST_ADD)
	X(AST_SUB)
	X(AST_MUL)
	X(AST_DIV)
	X(AST_MOD)
	X(AST_POW)
	X(AST_POS)
	X(AST_NEG)
	X(AST_LOGIC_AND)
	X(AST_LOGIC_OR)
	X(AST_LOGIC_NOT)
	X(AST_TERNARY)
	X(AST_MEMRD)
	X(AST_MEMWR)
	X(AST_MEMINIT)
	X(AST_TCALL)
	X(AST_ASSIGN)
	X(AST_CELL)
	X(AST_PRIMITIVE)
	X(AST_CELLARRAY)
	X(AST_ALWAYS)
	X(AST_INITIAL)
	X(AST_BLOCK)
	X(AST_ASSIGN_EQ)
	X(AST_ASSIGN_LE)
	X(AST_CASE)
	X(AST_COND)
	X(AST_CONDX)
	X(AST_CONDZ)
	X(AST_DEFAULT)
	X(AST_FOR)
	X(AST_WHILE)
	X(AST_REPEAT)
	X(AST_GENVAR)
	X(AST_GENFOR)
	X(AST_GENIF)
	X(AST_GENCASE)
	X(AST_GENBLOCK)
	X(AST_POSEDGE)
	X(AST_NEGEDGE)
	X(AST_EDGE)
#undef X
	default:
		log_abort();
	}
}

// check if attribute exists and has non-zero value
bool AstNode::get_bool_attribute(RTLIL::IdString id)
{
	if (attributes.count(id) == 0)
		return false;

	AstNode *attr = attributes.at(id);
	if (attr->type != AST_CONSTANT)
		log_error("Attribute `%s' with non-constant value at %s:%d!\n",
				id.c_str(), attr->filename.c_str(), attr->linenum);

	return attr->integer != 0;
}

// create new node (AstNode constructor)
// (the optional child arguments make it easier to create AST trees)
AstNode::AstNode(AstNodeType type, AstNode *child1, AstNode *child2)
{
	static unsigned int hashidx_count = 123456789;
	hashidx_count = mkhash_xorshift(hashidx_count);
	hashidx_ = hashidx_count;

	this->type = type;
	filename = current_filename;
	linenum = get_line_num();
	is_input = false;
	is_output = false;
	is_reg = false;
	is_signed = false;
	is_string = false;
	range_valid = false;
	range_swapped = false;
	port_id = 0;
	range_left = -1;
	range_right = 0;
	integer = 0;
	realvalue = 0;
	id2ast = NULL;
	basic_prep = false;

	if (child1)
		children.push_back(child1);
	if (child2)
		children.push_back(child2);
}

// create a (deep recursive) copy of a node
AstNode *AstNode::clone()
{
	AstNode *that = new AstNode;
	*that = *this;
	for (auto &it : that->children)
		it = it->clone();
	for (auto &it : that->attributes)
		it.second = it.second->clone();
	return that;
}

// create a (deep recursive) copy of a node use 'other' as target root node
void AstNode::cloneInto(AstNode *other)
{
	AstNode *tmp = clone();
	other->delete_children();
	*other = *tmp;
	tmp->children.clear();
	tmp->attributes.clear();
	delete tmp;
}

// delete all children in this node
void AstNode::delete_children()
{
	for (auto &it : children)
		delete it;
	children.clear();

	for (auto &it : attributes)
		delete it.second;
	attributes.clear();
}

// AstNode destructor
AstNode::~AstNode()
{
	delete_children();
}

// create a nice text representation of the node
// (traverse tree by recursion, use 'other' pointer for diffing two AST trees)
void AstNode::dumpAst(FILE *f, std::string indent)
{
	if (f == NULL) {
		for (auto f : log_files)
			dumpAst(f, indent);
		return;
	}

	std::string type_name = type2str(type);
	fprintf(f, "%s%s <%s:%d>", indent.c_str(), type_name.c_str(), filename.c_str(), linenum);

	if (id2ast)
		fprintf(f, " [%p -> %p]", this, id2ast);
	else
		fprintf(f, " [%p]", this);

	if (!str.empty())
		fprintf(f, " str='%s'", str.c_str());
	if (!bits.empty()) {
		fprintf(f, " bits='");
		for (size_t i = bits.size(); i > 0; i--)
			fprintf(f, "%c", bits[i-1] == RTLIL::S0 ? '0' :
					bits[i-1] == RTLIL::S1 ? '1' :
					bits[i-1] == RTLIL::Sx ? 'x' :
					bits[i-1] == RTLIL::Sz ? 'z' : '?');
		fprintf(f, "'(%d)", GetSize(bits));
	}
	if (is_input)
		fprintf(f, " input");
	if (is_output)
		fprintf(f, " output");
	if (is_reg)
		fprintf(f, " reg");
	if (is_signed)
		fprintf(f, " signed");
	if (port_id > 0)
		fprintf(f, " port=%d", port_id);
	if (range_valid || range_left != -1 || range_right != 0)
		fprintf(f, " %srange=[%d:%d]%s", range_swapped ? "swapped_" : "", range_left, range_right, range_valid ? "" : "!");
	if (integer != 0)
		fprintf(f, " int=%u", (int)integer);
	if (realvalue != 0)
		fprintf(f, " real=%e", realvalue);
	if (!multirange_dimensions.empty()) {
		fprintf(f, " multirange=[");
		for (int v : multirange_dimensions)
			fprintf(f, " %d", v);
		fprintf(f, " ]");
	}
	fprintf(f, "\n");

	for (auto &it : attributes) {
		fprintf(f, "%s  ATTR %s:\n", indent.c_str(), it.first.c_str());
		it.second->dumpAst(f, indent + "    ");
	}

	for (size_t i = 0; i < children.size(); i++)
		children[i]->dumpAst(f, indent + "  ");
}

// helper function for AstNode::dumpVlog()
static std::string id2vl(std::string txt)
{
	if (txt.size() > 1 && txt[0] == '\\')
		txt = txt.substr(1);
	for (size_t i = 0; i < txt.size(); i++) {
		if ('A' <= txt[i] && txt[i] <= 'Z') continue;
		if ('a' <= txt[i] && txt[i] <= 'z') continue;
		if ('0' <= txt[i] && txt[i] <= '9') continue;
		if (txt[i] == '_') continue;
		txt = "\\" + txt + " ";
		break;
	}
	return txt;
}

// dump AST node as Verilog pseudo-code
void AstNode::dumpVlog(FILE *f, std::string indent)
{
	bool first = true;
	std::string txt;
	std::vector<AstNode*> rem_children1, rem_children2;

	if (f == NULL) {
		for (auto f : log_files)
			dumpVlog(f, indent);
		return;
	}

	for (auto &it : attributes) {
		fprintf(f, "%s" "(* %s = ", indent.c_str(), id2vl(it.first.str()).c_str());
		it.second->dumpVlog(f, "");
		fprintf(f, " *)%s", indent.empty() ? "" : "\n");
	}

	switch (type)
	{
	case AST_MODULE:
		fprintf(f, "%s" "module %s(", indent.c_str(), id2vl(str).c_str());
		for (auto child : children)
			if (child->type == AST_WIRE && (child->is_input || child->is_output)) {
				fprintf(f, "%s%s", first ? "" : ", ", id2vl(child->str).c_str());
				first = false;
			}
		fprintf(f, ");\n");

		for (auto child : children)
			if (child->type == AST_PARAMETER || child->type == AST_LOCALPARAM || child->type == AST_DEFPARAM)
				child->dumpVlog(f, indent + "  ");
			else
				rem_children1.push_back(child);

		for (auto child : rem_children1)
			if (child->type == AST_WIRE || child->type == AST_AUTOWIRE || child->type == AST_MEMORY)
				child->dumpVlog(f, indent + "  ");
			else
				rem_children2.push_back(child);
		rem_children1.clear();

		for (auto child : rem_children2)
			if (child->type == AST_TASK || child->type == AST_FUNCTION)
				child->dumpVlog(f, indent + "  ");
			else
				rem_children1.push_back(child);
		rem_children2.clear();

		for (auto child : rem_children1)
			child->dumpVlog(f, indent + "  ");
		rem_children1.clear();

		fprintf(f, "%s" "endmodule\n", indent.c_str());
		break;

	case AST_WIRE:
		if (is_input && is_output)
			fprintf(f, "%s" "inout", indent.c_str());
		else if (is_input)
			fprintf(f, "%s" "input", indent.c_str());
		else if (is_output)
			fprintf(f, "%s" "output", indent.c_str());
		else if (!is_reg)
			fprintf(f, "%s" "wire", indent.c_str());
		if (is_reg)
			fprintf(f, "%s" "reg", (is_input || is_output) ? " " : indent.c_str());
		if (is_signed)
			fprintf(f, " signed");
		for (auto child : children) {
			fprintf(f, " ");
			child->dumpVlog(f, "");
		}
		fprintf(f, " %s", id2vl(str).c_str());
		fprintf(f, ";\n");
		break;

	case AST_MEMORY:
		fprintf(f, "%s" "memory", indent.c_str());
		if (is_signed)
			fprintf(f, " signed");
		for (auto child : children) {
			fprintf(f, " ");
			child->dumpVlog(f, "");
			if (first)
				fprintf(f, " %s", id2vl(str).c_str());
			first = false;
		}
		fprintf(f, ";\n");
		break;

	case AST_RANGE:
		if (range_valid)
			fprintf(f, "[%d:%d]", range_left, range_right);
		else {
			for (auto child : children) {
				fprintf(f, "%c", first ? '[' : ':');
				child->dumpVlog(f, "");
				first = false;
			}
			fprintf(f, "]");
		}
		break;

	case AST_ALWAYS:
		fprintf(f, "%s" "always @(", indent.c_str());
		for (auto child : children) {
			if (child->type != AST_POSEDGE && child->type != AST_NEGEDGE && child->type != AST_EDGE)
				continue;
			if (!first)
				fprintf(f, ", ");
			child->dumpVlog(f, "");
			first = false;
		}
		fprintf(f, ")\n");
		for (auto child : children) {
			if (child->type != AST_POSEDGE && child->type != AST_NEGEDGE && child->type != AST_EDGE)
				child->dumpVlog(f, indent + "  ");
		}
		break;

	case AST_INITIAL:
		fprintf(f, "%s" "initial\n", indent.c_str());
		for (auto child : children) {
			if (child->type != AST_POSEDGE && child->type != AST_NEGEDGE && child->type != AST_EDGE)
				child->dumpVlog(f, indent + "  ");
		}
		break;

	case AST_POSEDGE:
	case AST_NEGEDGE:
	case AST_EDGE:
		if (type == AST_POSEDGE)
			fprintf(f, "posedge ");
		if (type == AST_NEGEDGE)
			fprintf(f, "negedge ");
		for (auto child : children)
			child->dumpVlog(f, "");
		break;

	case AST_IDENTIFIER:
		fprintf(f, "%s", id2vl(str).c_str());
		for (auto child : children)
			child->dumpVlog(f, "");
		break;

	case AST_CONSTANT:
		if (!str.empty())
			fprintf(f, "\"%s\"", str.c_str());
		else if (bits.size() == 32)
			fprintf(f, "%d", RTLIL::Const(bits).as_int());
		else
			fprintf(f, "%d'b %s", GetSize(bits), RTLIL::Const(bits).as_string().c_str());
		break;

	case AST_REALVALUE:
		fprintf(f, "%e", realvalue);
		break;

	case AST_BLOCK:
		if (children.size() == 1) {
			children[0]->dumpVlog(f, indent);
		} else {
			fprintf(f, "%s" "begin\n", indent.c_str());
			for (auto child : children)
				child->dumpVlog(f, indent + "  ");
			fprintf(f, "%s" "end\n", indent.c_str());
		}
		break;

	case AST_CASE:
		if (!children.empty() && children[0]->type == AST_CONDX)
			fprintf(f, "%s" "casex (", indent.c_str());
		else if (!children.empty() && children[0]->type == AST_CONDZ)
			fprintf(f, "%s" "casez (", indent.c_str());
		else
			fprintf(f, "%s" "case (", indent.c_str());
		children[0]->dumpVlog(f, "");
		fprintf(f, ")\n");
		for (size_t i = 1; i < children.size(); i++) {
			AstNode *child = children[i];
			child->dumpVlog(f, indent + "  ");
		}
		fprintf(f, "%s" "endcase\n", indent.c_str());
		break;

	case AST_COND:
	case AST_CONDX:
	case AST_CONDZ:
		for (auto child : children) {
			if (child->type == AST_BLOCK) {
				fprintf(f, ":\n");
				child->dumpVlog(f, indent + "  ");
				first = true;
			} else {
				fprintf(f, "%s", first ? indent.c_str() : ", ");
				if (child->type == AST_DEFAULT)
					fprintf(f, "default");
				else
					child->dumpVlog(f, "");
				first = false;
			}
		}
		break;

	case AST_ASSIGN_EQ:
	case AST_ASSIGN_LE:
		fprintf(f, "%s", indent.c_str());
		children[0]->dumpVlog(f, "");
		fprintf(f, " %s ", type == AST_ASSIGN_EQ ? "=" : "<=");
		children[1]->dumpVlog(f, "");
		fprintf(f, ";\n");
		break;

	case AST_CONCAT:
		fprintf(f, "{");
		for (auto child : children) {
			if (!first)
				fprintf(f, ", ");
			child->dumpVlog(f, "");
			first = false;
		}
		fprintf(f, "}");
		break;

	case AST_REPLICATE:
		fprintf(f, "{");
		children[0]->dumpVlog(f, "");
		fprintf(f, "{");
		children[1]->dumpVlog(f, "");
		fprintf(f, "}}");
		break;

	if (0) { case AST_BIT_NOT:     txt = "~";  }
	if (0) { case AST_REDUCE_AND:  txt = "&";  }
	if (0) { case AST_REDUCE_OR:   txt = "|";  }
	if (0) { case AST_REDUCE_XOR:  txt = "^";  }
	if (0) { case AST_REDUCE_XNOR: txt = "~^"; }
	if (0) { case AST_REDUCE_BOOL: txt = "|";  }
	if (0) { case AST_POS:         txt = "+";  }
	if (0) { case AST_NEG:         txt = "-";  }
	if (0) { case AST_LOGIC_NOT:   txt = "!";  }


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