From 70b9cc994d084ea486b28d3e33415ba7e109bf6e Mon Sep 17 00:00:00 2001
From: Jonathan Bradley <jcb@pikum.xyz>
Date: Wed, 4 Oct 2023 15:59:37 -0400
Subject: parse floats and lists of floats

---
 src/helpers.cpp | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

(limited to 'src/helpers.cpp')

diff --git a/src/helpers.cpp b/src/helpers.cpp
index 796aa2e..7ae21c9 100644
--- a/src/helpers.cpp
+++ b/src/helpers.cpp
@@ -2,6 +2,7 @@
 #include "helpers.hpp"
 
 #include <cerrno>
+#include <cmath>
 #include <cstdlib>
 #include <climits>
 
@@ -113,3 +114,47 @@ STR2NUM_ERROR str2num(uint16_t &i, char const *s, int base) {
   return SUCCESS;
 }
 
+STR2NUM_ERROR str2num(float &f, char const *s, char *&pEnd) {
+  float l;
+  errno = 0;
+  l = strtof(s, &pEnd);
+  if (errno == ERANGE && l == HUGE_VALF) {
+    return OVERFLOW;
+  }
+  if (errno == ERANGE && l == -HUGE_VALF) {
+    return UNDERFLOW;
+  }
+  if (*s == '\0' || *pEnd != '\0') {
+    return INCONVERTIBLE;
+  }
+  f = l;
+  return SUCCESS;
+}
+
+STR2NUM_ERROR str2num(float &f, char const *s) {
+  char *end;
+	return str2num(f, s, end);
+}
+
+STR2NUM_ERROR str2num(double &d, char const *s, char *&pEnd) {
+  char *end;
+  float l;
+  errno = 0;
+  l = strtod(s, &end);
+  if (errno == ERANGE && l == HUGE_VAL) {
+    return OVERFLOW;
+  }
+  if (errno == ERANGE && l == -HUGE_VAL) {
+    return UNDERFLOW;
+  }
+  if (*s == '\0' || *end != '\0') {
+    return INCONVERTIBLE;
+  }
+  d = l;
+  return SUCCESS;
+}
+
+STR2NUM_ERROR str2num(double &d, char const *s) {
+  char *end;
+	return str2num(d, s, end);
+}
-- 
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