From e020805cb140ed98d09e606a867b910fce78ad15 Mon Sep 17 00:00:00 2001
From: Steven Le Rouzic <steven.lerouzic@gmail.com>
Date: Thu, 10 Oct 2024 23:38:35 +0200
Subject: Integers formatting

---
 asl/format.cpp | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)

(limited to 'asl/format.cpp')

diff --git a/asl/format.cpp b/asl/format.cpp
index 4866562..eb653e9 100644
--- a/asl/format.cpp
+++ b/asl/format.cpp
@@ -1,4 +1,6 @@
 #include "asl/format.hpp"
+#include "asl/utility.hpp"
+#include "asl/assert.hpp"
 
 void asl::format_internals::format(
     writer* writer,
@@ -67,3 +69,119 @@ void asl::format_internals::format(
 
     f.write(begin, fmt - begin);
 }
+
+void asl::AslFormat(formatter& f, float)
+{
+    f.write("<FLOAT>", 7); // @Todo Float formatting
+}
+
+void asl::AslFormat(formatter& f, double)
+{
+    f.write("<DOUBLE>", 8); // @Todo Float formatting
+}
+
+void asl::AslFormat(formatter& f, uint8_t v)
+{
+    AslFormat(f, static_cast<uint64_t>(v));
+}
+
+void asl::AslFormat(formatter& f, uint16_t v)
+{
+    AslFormat(f, static_cast<uint64_t>(v));
+}
+
+void asl::AslFormat(formatter& f, uint32_t v)
+{
+    AslFormat(f, static_cast<uint64_t>(v));
+}
+
+void asl::AslFormat(formatter& f, uint64_t v)
+{
+    static constexpr char pairs[] = {
+        '0', '0', '0', '1', '0', '2', '0', '3', '0', '4',
+        '0', '5', '0', '6', '0', '7', '0', '8', '0', '9',
+        '1', '0', '1', '1', '1', '2', '1', '3', '1', '4',
+        '1', '5', '1', '6', '1', '7', '1', '8', '1', '9',
+        '2', '0', '2', '1', '2', '2', '2', '3', '2', '4',
+        '2', '5', '2', '6', '2', '7', '2', '8', '2', '9',
+        '3', '0', '3', '1', '3', '2', '3', '3', '3', '4',
+        '3', '5', '3', '6', '3', '7', '3', '8', '3', '9',
+        '4', '0', '4', '1', '4', '2', '4', '3', '4', '4',
+        '4', '5', '4', '6', '4', '7', '4', '8', '4', '9',
+        '5', '0', '5', '1', '5', '2', '5', '3', '5', '4',
+        '5', '5', '5', '6', '5', '7', '5', '8', '5', '9',
+        '6', '0', '6', '1', '6', '2', '6', '3', '6', '4',
+        '6', '5', '6', '6', '6', '7', '6', '8', '6', '9',
+        '7', '0', '7', '1', '7', '2', '7', '3', '7', '4',
+        '7', '5', '7', '6', '7', '7', '7', '8', '7', '9',
+        '8', '0', '8', '1', '8', '2', '8', '3', '8', '4',
+        '8', '5', '8', '6', '8', '7', '8', '8', '8', '9',
+        '9', '0', '9', '1', '9', '2', '9', '3', '9', '4',
+        '9', '5', '9', '6', '9', '7', '9', '8', '9', '9',
+    };
+
+    static constexpr int32_t kMaxDigits = 20;
+    char buffer[kMaxDigits];
+    int32_t cursor = kMaxDigits;
+
+    auto write_two = [&buffer, &cursor](const char* str)
+    {
+        ASL_ASSERT(cursor >= 2);
+        buffer[--cursor] = str[1];
+        buffer[--cursor] = str[0];
+    };
+
+    auto write_one = [&buffer, &cursor](char c)
+    {
+        ASL_ASSERT(cursor >= 1);
+        buffer[--cursor] = c;
+    };
+
+    while (v >= 100)
+    {
+        uint64_t x = v % 100;
+        v /= 100;
+        write_two(pairs + x * 2);
+    }
+
+    if (v >= 10)
+    {
+        write_two(pairs + v * 2);
+    }
+    else if (v > 0 || cursor == kMaxDigits)
+    {
+        ASL_ASSERT(v < 10);
+        write_one('0' + (char)v);
+    }
+
+    f.write(buffer + cursor, kMaxDigits - cursor);
+}
+
+void asl::AslFormat(formatter& f, int8_t v)
+{
+    AslFormat(f, static_cast<int64_t>(v));
+}
+
+void asl::AslFormat(formatter& f, int16_t v)
+{
+    AslFormat(f, static_cast<int64_t>(v));
+}
+
+void asl::AslFormat(formatter& f, int32_t v)
+{
+    AslFormat(f, static_cast<int64_t>(v));
+}
+
+void asl::AslFormat(formatter& f, int64_t v)
+{
+    if (v < 0)
+    {
+        f.write("-", 1);
+        uint64_t absolute_value = ~(bit_cast<uint64_t>(v) - 1);
+        AslFormat(f, absolute_value);
+    }
+    else
+    {
+        AslFormat(f, static_cast<uint64_t>(v));
+    }
+}
-- 
cgit