From c78d628182fe56dadb2c25ce08de92908e106e53 Mon Sep 17 00:00:00 2001
From: Guillaume Horel <guillaume.horel@gmail.com>
Date: Mon, 23 Jan 2023 16:59:34 -0500
Subject: zero copy buffer layout

---
 c_layer/survival_curve.hpp | 40 ++++++++++------------------------------
 1 file changed, 10 insertions(+), 30 deletions(-)

(limited to 'c_layer/survival_curve.hpp')

diff --git a/c_layer/survival_curve.hpp b/c_layer/survival_curve.hpp
index ce71cc1..b3dcebd 100644
--- a/c_layer/survival_curve.hpp
+++ b/c_layer/survival_curve.hpp
@@ -1,56 +1,35 @@
-#include <string>
+#include <string_view>
 
 struct CurveName {
-    enum class __attribute__ ((__packed__)) Seniority {
+    enum class Seniority: std::uint8_t {
         Senior,
         Subordinated
     };
 
-    enum class __attribute__ ((__packed__)) DocClause {
+    enum class DocClause: std::uint8_t {
         XR14,
         MR14,
         MM14,
         CR14
     };
-    void serialize(unsigned char* buf) {
-        memcpy(buf, &seniority, sizeof(Seniority));
-        buf += sizeof(Seniority);
-        memcpy(buf, &doc_clause, sizeof(DocClause));
-        buf += sizeof(DocClause);
-        strcpy((char*)buf, ticker.c_str());
-    };
-
     std::string full_ticker() const {
-        std::string r = ticker;
+        std::string r = {ticker.begin(), ticker.end()};
         return r.append("_").append(str_seniority()).
             append("_").append(str_doc_clause());
     }
 
-    void serialize(unsigned char* buf, size_t num) {
-        memcpy(buf, &seniority, sizeof(Seniority));
-        buf += sizeof(Seniority);
-        memcpy(buf, &doc_clause, sizeof(DocClause));
-        buf += sizeof(DocClause);
-        strncpy((char*)buf, ticker.c_str(), num);
-    };
-
-    CurveName(std::string& ticker, Seniority seniority, DocClause doc_clause) :
-        ticker(ticker),
-        seniority(seniority),
-        doc_clause(doc_clause) {};
-
-    CurveName(const unsigned char* buf) {
+    CurveName(const char* buf) : name(buf) {
         memcpy(&seniority, buf, sizeof(Seniority));
         buf += sizeof(Seniority);
         memcpy(&doc_clause, buf, sizeof(DocClause));
         buf += sizeof(DocClause);
-        ticker = std::string((char*)buf);
+        ticker = std::string_view((const char*)buf);
     }
 
     CurveName() {};
 
-    size_t size() {
-        return sizeof(Seniority) + sizeof(DocClause) + ticker.length() + 1;
+    size_t size() const {
+        return sizeof(Seniority) + sizeof(DocClause) + ticker.size() + 1;
     };
 
     bool operator<(const CurveName &other) const {
@@ -82,7 +61,8 @@ struct CurveName {
         }
     }
 
-    std::string ticker;
+    const char* name;
+    std::string_view ticker;
     Seniority seniority;
     DocClause doc_clause;
 };
-- 
cgit v1.2.3-70-g09d2