From 31dc984812e538f3db37d7d8816db0fa649f4f27 Mon Sep 17 00:00:00 2001
From: Jonathan Bradley <jcb@pikum.xyz>
Date: Fri, 22 Sep 2023 09:20:58 -0400
Subject: prase int string helpers - untested

---
 src/helpers.cpp | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/helpers.hpp |  15 ++++++++
 2 files changed, 130 insertions(+)
 create mode 100644 src/helpers.cpp
 create mode 100644 src/helpers.hpp

(limited to 'src')

diff --git a/src/helpers.cpp b/src/helpers.cpp
new file mode 100644
index 0000000..796aa2e
--- /dev/null
+++ b/src/helpers.cpp
@@ -0,0 +1,115 @@
+
+#include "helpers.hpp"
+
+#include <cerrno>
+#include <cstdlib>
+#include <climits>
+
+STR2NUM_ERROR str2num(int64_t &i, char const *s, int base) {
+  char *end;
+  long long l;
+  errno = 0;
+  l = strtoll(s, &end, base);
+  if (errno == ERANGE && l == LLONG_MAX) {
+    return OVERFLOW;
+  }
+  if (errno == ERANGE && l == LLONG_MIN) {
+    return UNDERFLOW;
+  }
+  if (*s == '\0' || *end != '\0') {
+    return INCONVERTIBLE;
+  }
+  i = l;
+  return SUCCESS;
+}
+
+STR2NUM_ERROR str2num(uint64_t &i, char const *s, int base) {
+  char *end;
+  long long l;
+  errno = 0;
+  l = strtoull(s, &end, base);
+  if (errno == ERANGE && l == LLONG_MAX) {
+    return OVERFLOW;
+  }
+  if (errno == ERANGE && l == LLONG_MIN) {
+    return UNDERFLOW;
+  }
+  if (*s == '\0' || *end != '\0') {
+    return INCONVERTIBLE;
+  }
+  i = l;
+  return SUCCESS;
+}
+
+STR2NUM_ERROR str2num(int32_t &i, char const *s, int base) {
+  char *end;
+  long l;
+  errno = 0;
+  l = strtol(s, &end, base);
+  if (errno == ERANGE && l == LONG_MAX) {
+    return OVERFLOW;
+  }
+  if (errno == ERANGE && l == LONG_MIN) {
+    return UNDERFLOW;
+  }
+  if (*s == '\0' || *end != '\0') {
+    return INCONVERTIBLE;
+  }
+  i = l;
+  return SUCCESS;
+}
+
+STR2NUM_ERROR str2num(uint32_t &i, char const *s, int base) {
+  char *end;
+  long l;
+  errno = 0;
+  l = strtoul(s, &end, base);
+  if (errno == ERANGE && l == LONG_MAX) {
+    return OVERFLOW;
+  }
+  if (errno == ERANGE && l == LONG_MIN) {
+    return UNDERFLOW;
+  }
+  if (*s == '\0' || *end != '\0') {
+    return INCONVERTIBLE;
+  }
+  i = l;
+  return SUCCESS;
+}
+
+STR2NUM_ERROR str2num(int16_t &i, char const *s, int base) {
+  char *end;
+  long l;
+  errno = 0;
+  l = strtol(s, &end, base);
+  if (errno == ERANGE && l == LONG_MAX) {
+    return OVERFLOW;
+  }
+  if (errno == ERANGE && l == LONG_MIN) {
+    return UNDERFLOW;
+  }
+  if (*s == '\0' || *end != '\0') {
+    return INCONVERTIBLE;
+  }
+  i = l;
+  return SUCCESS;
+}
+
+STR2NUM_ERROR str2num(uint16_t &i, char const *s, int base) {
+  char *end;
+  long l;
+  errno = 0;
+  l = strtoul(s, &end, base);
+  if (errno == ERANGE && l == LONG_MAX) {
+    return OVERFLOW;
+  }
+  if (errno == ERANGE && l == LONG_MIN) {
+    return UNDERFLOW;
+  }
+  if (*s == '\0' || *end != '\0') {
+    return INCONVERTIBLE;
+  }
+  i = l;
+  return SUCCESS;
+}
+
diff --git a/src/helpers.hpp b/src/helpers.hpp
new file mode 100644
index 0000000..a429416
--- /dev/null
+++ b/src/helpers.hpp
@@ -0,0 +1,15 @@
+#ifndef PKE_HELPERS_HPP
+#define PKE_HELPERS_HPP
+
+#include <cstdint>
+
+enum STR2NUM_ERROR { SUCCESS, OVERFLOW, UNDERFLOW, INCONVERTIBLE };
+
+STR2NUM_ERROR str2num(int64_t &i, char const *s, int base = 0);
+STR2NUM_ERROR str2num(uint64_t &i, char const *s, int base = 0);
+STR2NUM_ERROR str2num(int32_t &i, char const *s, int base = 0);
+STR2NUM_ERROR str2num(uint32_t &i, char const *s, int base = 0);
+STR2NUM_ERROR str2num(int16_t &i, char const *s, int base = 0);
+STR2NUM_ERROR str2num(uint16_t &i, char const *s, int base = 0);
+
+#endif /* PKE_HELPERS_HPP */
-- 
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