prase int string helpers - untested

1 files changed, 115 insertions, 0 deletions

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;
+}
+