common: Adding NPNR_ASSERT

Signed-off-by: David Shah <davey1576@gmail.com>

common/nextpnr.cc

@@ -21,6 +21,12 @@
 
 NEXTPNR_NAMESPACE_BEGIN
 
+assertion_failure::assertion_failure(std::string msg, std::string expr_str, std::string filename, int line)
+        : runtime_error("Assertion failure: " + msg + " (" + filename + ":" + std::to_string(line) + ")"), msg(msg),
+          expr_str(expr_str), filename(filename), line(line)
+{
+}
+
 std::unordered_set<BaseCtx *> IdString::global_ctx;
 
 void IdString::set(const BaseCtx *ctx, const std::string &s)

common/nextpnr.h

@@ -20,6 +20,7 @@
 #include <algorithm>
 #include <assert.h>
 #include <memory>
+#include <stdexcept>
 #include <stdint.h>
 #include <string>
 #include <unordered_map>
@@ -60,6 +61,26 @@
 
 NEXTPNR_NAMESPACE_BEGIN
 
+class assertion_failure : std::runtime_error
+{
+  public:
+    assertion_failure(std::string msg, std::string expr_str, std::string filename, int line);
+
+    std::string msg;
+    std::string expr_str;
+    std::string filename;
+    int line;
+};
+
+inline void except_assert_impl(bool expr, std::string message, std::string expr_str, std::string filename, int line)
+{
+    if (!expr)
+        throw assertion_failure(message, expr_str, filename, line);
+}
+
+#define NPNR_ASSERT(cond) except_assert_impl((cond), #cond, #cond, __FILE__, __LINE__)
+#define NPNR_ASSERT_MSG(cond, msg) except_assert_impl((cond), msg, #cond, __FILE__, __LINE__)
+
 struct BaseCtx;
 struct Context;
 
@@ -68,6 +89,7 @@ struct IdString
     int index = 0;
 
     static void initialize_arch(const BaseCtx *ctx);
+
     static void initialize_add(const BaseCtx *ctx, const char *s, int idx);
 
     IdString() {}
@@ -79,6 +101,7 @@ struct IdString
     IdString(const BaseCtx *ctx, const char *s) { set(ctx, s); }
 
     const std::string &str(const BaseCtx *ctx) const;
+
     const char *c_str(const BaseCtx *ctx) const;
 
     bool operator<(const IdString &other) const { return index < other.index; }
@@ -212,6 +235,7 @@ struct BaseCtx
     mutable std::vector<const std::string *> *idstring_idx_to_str;
 
     IdString id(const std::string &s) const { return IdString(this, s); }
+
     IdString id(const char *s) const { return IdString(this, s); }
 
     // --------------------------------------------------------------
@@ -250,6 +274,7 @@ struct Context : Arch
     bool force = false;
     bool timing_driven = true;
     float target_freq = 12e6;
+
     Context(ArchArgs args) : Arch(args) {}
 
     // --------------------------------------------------------------
@@ -315,6 +340,7 @@ struct Context : Arch
     }
 
     uint32_t checksum() const;
+
     void check() const;
 };