Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 333 insertions, 0 deletions

diff --git a/src/common/strtol.cc b/src/common/strtol.cc
new file mode 100644
index 000000000..11b900352
--- /dev/null
+++ b/src/common/strtol.cc
@@ -0,0 +1,333 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 New Dream Network
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#include "strtol.h"
+
+#include <algorithm>
+#include <climits>
+#include <limits>
+#include <cmath>
+#include <sstream>
+#include <strings.h>
+#include <string_view>
+
+using std::ostringstream;
+
+bool strict_strtob(const char* str, std::string *err)
+{
+  if (strcasecmp(str, "false") == 0) {
+    return false;
+  } else if (strcasecmp(str, "true") == 0) {
+    return true;
+  } else {
+    int b = strict_strtol(str, 10, err);
+    return (bool)!!b;
+  }
+}
+
+long long strict_strtoll(std::string_view str, int base, std::string *err)
+{
+  char *endptr;
+  errno = 0; /* To distinguish success/failure after call (see man page) */
+  long long ret = strtoll(str.data(), &endptr, base);
+  if (endptr == str.data() || endptr != str.data() + str.size()) {
+    *err = (std::string{"Expected option value to be integer, got '"} +
+	    std::string{str} + "'");
+    return 0;
+  }
+  if (errno) {
+    *err = (std::string{"The option value '"} + std::string{str} +
+	    "' seems to be invalid");
+    return 0;
+  }
+  *err = "";
+  return ret;
+}
+
+long long strict_strtoll(const char *str, int base, std::string *err)
+{
+  return strict_strtoll(std::string_view(str), base, err);
+}
+
+int strict_strtol(std::string_view str, int base, std::string *err)
+{
+  long long ret = strict_strtoll(str, base, err);
+  if (!err->empty())
+    return 0;
+  if ((ret < INT_MIN) || (ret > INT_MAX)) {
+    ostringstream errStr;
+    errStr << "The option value '" << str << "' seems to be invalid";
+    *err = errStr.str();
+    return 0;
+  }
+  return static_cast<int>(ret);
+}
+
+int strict_strtol(const char *str, int base, std::string *err)
+{
+  return strict_strtol(std::string_view(str), base, err);
+}
+
+double strict_strtod(std::string_view str, std::string *err)
+{
+  char *endptr;
+  errno = 0; /* To distinguish success/failure after call (see man page) */
+  double ret = strtod(str.data(), &endptr);
+  if (errno == ERANGE) {
+    ostringstream oss;
+    oss << "strict_strtod: floating point overflow or underflow parsing '"
+	<< str << "'";
+    *err = oss.str();
+    return 0.0;
+  }
+  if (endptr == str) {
+    ostringstream oss;
+    oss << "strict_strtod: expected double, got: '" << str << "'";
+    *err = oss.str();
+    return 0;
+  }
+  if (*endptr != '\0') {
+    ostringstream oss;
+    oss << "strict_strtod: garbage at end of string. got: '" << str << "'";
+    *err = oss.str();
+    return 0;
+  }
+  *err = "";
+  return ret;
+}
+
+double strict_strtod(const char *str, std::string *err)
+{
+  return strict_strtod(std::string_view(str), err);
+}
+
+float strict_strtof(std::string_view str, std::string *err)
+{
+  char *endptr;
+  errno = 0; /* To distinguish success/failure after call (see man page) */
+  float ret = strtof(str.data(), &endptr);
+  if (errno == ERANGE) {
+    ostringstream oss;
+    oss << "strict_strtof: floating point overflow or underflow parsing '"
+	<< str << "'";
+    *err = oss.str();
+    return 0.0;
+  }
+  if (endptr == str) {
+    ostringstream oss;
+    oss << "strict_strtof: expected float, got: '" << str << "'";
+    *err = oss.str();
+    return 0;
+  }
+  if (*endptr != '\0') {
+    ostringstream oss;
+    oss << "strict_strtof: garbage at end of string. got: '" << str << "'";
+    *err = oss.str();
+    return 0;
+  }
+  *err = "";
+  return ret;
+}
+
+float strict_strtof(const char *str, std::string *err)
+{
+  return strict_strtof(std::string_view(str), err);
+}
+
+template<typename T>
+T strict_iec_cast(std::string_view str, std::string *err)
+{
+  if (str.empty()) {
+    *err = "strict_iecstrtoll: value not specified";
+    return 0;
+  }
+  // get a view of the unit and of the value
+  std::string_view unit;
+  std::string_view n = str;
+  size_t u = str.find_first_not_of("0123456789-+");
+  int m = 0;
+  // deal with unit prefix if there is one
+  if (u != std::string_view::npos) {
+    n = str.substr(0, u);
+    unit = str.substr(u, str.length() - u);
+    // we accept both old si prefixes as well as the proper iec prefixes
+    // i.e. K, M, ... and Ki, Mi, ...
+    if (unit.back() == 'i') {
+      if (unit.front() == 'B') {
+        *err = "strict_iecstrtoll: illegal prefix \"Bi\"";
+        return 0;
+      }
+    }
+    if (unit.length() > 2) {
+      *err = "strict_iecstrtoll: illegal prefix (length > 2)";
+      return 0;
+    }
+    switch(unit.front()) {
+      case 'K':
+        m = 10;
+        break;
+      case 'M':
+        m = 20;
+        break;
+      case 'G':
+        m = 30;
+        break;
+      case 'T':
+        m = 40;
+        break;
+      case 'P':
+        m = 50;
+        break;
+      case 'E':
+        m = 60;
+        break;
+      case 'B':
+        break;
+      default:
+        *err = "strict_iecstrtoll: unit prefix not recognized";
+        return 0;
+    }
+  }
+
+  long long ll = strict_strtoll(n, 10, err);
+  if (ll < 0 && !std::numeric_limits<T>::is_signed) {
+    *err = "strict_iecstrtoll: value should not be negative";
+    return 0;
+  }
+  if (static_cast<unsigned>(m) >= sizeof(T) * CHAR_BIT) {
+    *err = ("strict_iecstrtoll: the IEC prefix is too large for the designated "
+        "type");
+    return 0;
+  }
+  using promoted_t = typename std::common_type<decltype(ll), T>::type;
+  if (static_cast<promoted_t>(ll) <
+      static_cast<promoted_t>(std::numeric_limits<T>::min()) >> m) {
+    *err = "strict_iecstrtoll: value seems to be too small";
+    return 0;
+  }
+  if (static_cast<promoted_t>(ll) >
+      static_cast<promoted_t>(std::numeric_limits<T>::max()) >> m) {
+    *err = "strict_iecstrtoll: value seems to be too large";
+    return 0;
+  }
+  return (ll << m);
+}
+
+template int strict_iec_cast<int>(std::string_view str, std::string *err);
+template long strict_iec_cast<long>(std::string_view str, std::string *err);
+template long long strict_iec_cast<long long>(std::string_view str, std::string *err);
+template uint64_t strict_iec_cast<uint64_t>(std::string_view str, std::string *err);
+template uint32_t strict_iec_cast<uint32_t>(std::string_view str, std::string *err);
+
+uint64_t strict_iecstrtoll(std::string_view str, std::string *err)
+{
+  return strict_iec_cast<uint64_t>(str, err);
+}
+
+uint64_t strict_iecstrtoll(const char *str, std::string *err)
+{
+  return strict_iec_cast<uint64_t>(std::string_view(str), err);
+}
+
+template<typename T>
+T strict_iec_cast(const char *str, std::string *err)
+{
+  return strict_iec_cast<T>(std::string_view(str), err);
+}
+
+template int strict_iec_cast<int>(const char *str, std::string *err);
+template long strict_iec_cast<long>(const char *str, std::string *err);
+template long long strict_iec_cast<long long>(const char *str, std::string *err);
+template uint64_t strict_iec_cast<uint64_t>(const char *str, std::string *err);
+template uint32_t strict_iec_cast<uint32_t>(const char *str, std::string *err);
+
+template<typename T>
+T strict_si_cast(std::string_view str, std::string *err)
+{
+  if (str.empty()) {
+    *err = "strict_sistrtoll: value not specified";
+    return 0;
+  }
+  std::string_view n = str;
+  int m = 0;
+  // deal with unit prefix is there is one
+  if (str.find_first_not_of("0123456789+-") != std::string_view::npos) {
+    const char &u = str.back();
+    if (u == 'K')
+      m = 3;
+    else if (u == 'M')
+      m = 6;
+    else if (u == 'G')
+      m = 9;
+    else if (u == 'T')
+      m = 12;
+    else if (u == 'P')
+      m = 15;
+    else if (u == 'E')
+      m = 18;
+    else if (u != 'B') {
+      *err = "strict_si_cast: unit prefix not recognized";
+      return 0;
+    }
+
+    if (m >= 3)
+      n = str.substr(0, str.length() -1);
+  }
+
+  long long ll = strict_strtoll(n, 10, err);
+  if (ll < 0 && !std::numeric_limits<T>::is_signed) {
+    *err = "strict_sistrtoll: value should not be negative";
+    return 0;
+  }
+  using promoted_t = typename std::common_type<decltype(ll), T>::type;
+  auto v = static_cast<promoted_t>(ll);
+  auto coefficient = static_cast<promoted_t>(powl(10, m));
+  if (v != std::clamp(v,
+		      (static_cast<promoted_t>(std::numeric_limits<T>::min()) /
+		       coefficient),
+		      (static_cast<promoted_t>(std::numeric_limits<T>::max()) /
+		       coefficient))) {
+    *err = "strict_sistrtoll: value out of range";
+    return 0;
+  }
+  return v * coefficient;
+}
+
+template int strict_si_cast<int>(std::string_view str, std::string *err);
+template long strict_si_cast<long>(std::string_view str, std::string *err);
+template long long strict_si_cast<long long>(std::string_view str, std::string *err);
+template uint64_t strict_si_cast<uint64_t>(std::string_view str, std::string *err);
+template uint32_t strict_si_cast<uint32_t>(std::string_view str, std::string *err);
+
+uint64_t strict_sistrtoll(std::string_view str, std::string *err)
+{
+  return strict_si_cast<uint64_t>(str, err);
+}
+
+uint64_t strict_sistrtoll(const char *str, std::string *err)
+{
+  return strict_si_cast<uint64_t>(str, err);
+}
+
+template<typename T>
+T strict_si_cast(const char *str, std::string *err)
+{
+  return strict_si_cast<T>(std::string_view(str), err);
+}
+
+template int strict_si_cast<int>(const char *str, std::string *err);
+template long strict_si_cast<long>(const char *str, std::string *err);
+template long long strict_si_cast<long long>(const char *str, std::string *err);
+template uint64_t strict_si_cast<uint64_t>(const char *str, std::string *err);
+template uint32_t strict_si_cast<uint32_t>(const char *str, std::string *err);