From 25aff26fb8ced9c032c5593ad6acdd78b09d225f Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Sun, 24 Nov 2019 14:56:07 +0800
Subject: main - Move debug code to `debug.cpp` (preparation for moving all
 logic to a library)

---
 src/debug.cpp | 138 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)

(limited to 'src/debug.cpp')

diff --git a/src/debug.cpp b/src/debug.cpp
index 8a0d1f3c..81bb0688 100644
--- a/src/debug.cpp
+++ b/src/debug.cpp
@@ -5,7 +5,18 @@
  * debug.cpp
  * - Debug printing (with indenting)
  */
+#include <debug_inner.hpp>
 #include <debug.hpp>
+#include <set>
+#include <iostream>
+#include <iomanip>
+#include <common.hpp>   // FmtEscaped
+
+
+int g_debug_indent_level = 0;
+bool g_debug_enabled = true;
+::std::string g_cur_phase;
+::std::set< ::std::string>    g_debug_disable_map;
 
 TraceLog::TraceLog(const char* tag, ::std::function<void(::std::ostream&)> info_cb, ::std::function<void(::std::ostream&)> ret):
     m_tag(tag),
@@ -50,3 +61,130 @@ TraceLog::~TraceLog() {
         os << ")" << ::std::endl;
     }
 }
+
+
+
+bool debug_enabled_update() {
+    if( g_debug_disable_map.count(g_cur_phase) != 0 ) {
+        return false;
+    }
+    else {
+        return true;
+    }
+}
+bool debug_enabled()
+{
+    return g_debug_enabled;
+}
+::std::ostream& debug_output(int indent, const char* function)
+{
+    return ::std::cout << g_cur_phase << "- " << RepeatLitStr { " ", indent } << function << ": ";
+}
+
+DebugTimedPhase::DebugTimedPhase(const char* name):
+    m_name(name)
+{
+    ::std::cout << m_name << ": V V V" << ::std::endl;
+    g_cur_phase = m_name;
+    g_debug_enabled = debug_enabled_update();
+    m_start = clock();
+}
+DebugTimedPhase::~DebugTimedPhase()
+{
+    auto end = clock();
+    g_cur_phase = "";
+    g_debug_enabled = debug_enabled_update();
+
+    // TODO: Show wall time too?
+    ::std::cout << "(" << ::std::fixed << ::std::setprecision(2) << static_cast<double>(end - m_start) / static_cast<double>(CLOCKS_PER_SEC) << " s) ";
+    ::std::cout << m_name << ": DONE";
+    ::std::cout << ::std::endl;
+}
+
+extern void debug_init_phases(const char* env_var_name, std::initializer_list<const char*> il)
+{
+    for(const char* e : il)
+    {
+        g_debug_disable_map.insert(e);
+    }
+
+    // Mutate this map using an environment variable
+    const char* debug_string = ::std::getenv(env_var_name);
+    if( debug_string )
+    {
+        while( debug_string[0] )
+        {
+            const char* end = strchr(debug_string, ':');
+
+            ::std::string   s;
+            if( end )
+            {
+                s = ::std::string { debug_string, end };
+                debug_string = end + 1;
+            }
+            else
+            {
+                s = debug_string;
+            }
+            if( g_debug_disable_map.erase(s) == 0 )
+            {
+                ::std::cerr << "WARN: Unknown compiler phase '" << s << "' in $" << env_var_name << ::std::endl;
+            }
+            if( !end ) {
+                break;
+            }
+        }
+    }
+}
+
+
+::std::ostream& operator<<(::std::ostream& os, const FmtEscaped& x)
+{
+    os << ::std::hex;
+    for(auto s = x.s; *s != '\0'; s ++)
+    {
+        switch(*s)
+        {
+        case '\0':  os << "\\0";    break;
+        case '\n':  os << "\\n";    break;
+        case '\\':  os << "\\\\";   break;
+        case '"':   os << "\\\"";   break;
+        default:
+            uint8_t v = *s;
+            if( v < 0x80 )
+            {
+                if( v < ' ' || v > 0x7F )
+                    os << "\\u{" << ::std::hex << (unsigned int)v << "}";
+                else
+                    os << v;
+            }
+            else if( v < 0xC0 )
+                ;
+            else if( v < 0xE0 )
+            {
+                uint32_t    val = (uint32_t)(v & 0x1F) << 6;
+                v = (uint8_t)*++s; if( (v & 0xC0) != 0x80 ) { s--; continue ; } val |= (uint32_t)v << 6;
+                os << "\\u{" << ::std::hex << val << "}";
+            }
+            else if( v < 0xF0 )
+            {
+                uint32_t    val = (uint32_t)(v & 0x0F) << 12;
+                v = (uint8_t)*++s; if( (v & 0xC0) != 0x80 ) { s--; continue ; } val |= (uint32_t)v << 12;
+                v = (uint8_t)*++s; if( (v & 0xC0) != 0x80 ) { s--; continue ; } val |= (uint32_t)v << 6;
+                os << "\\u{" << ::std::hex << val << "}";
+            }
+            else if( v < 0xF8 )
+            {
+                uint32_t    val = (uint32_t)(v & 0x07) << 18;
+                v = (uint8_t)*++s; if( (v & 0xC0) != 0x80 ) { s--; continue ; } val |= (uint32_t)v << 18;
+                v = (uint8_t)*++s; if( (v & 0xC0) != 0x80 ) { s--; continue ; } val |= (uint32_t)v << 12;
+                v = (uint8_t)*++s; if( (v & 0xC0) != 0x80 ) { s--; continue ; } val |= (uint32_t)v << 6;
+                os << "\\u{" << ::std::hex << val << "}";
+            }
+            break;
+        }
+    }
+    os << ::std::dec;
+    return os;
+}
+
-- 
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