libcxx/src/support/ibm/xlocale_zos.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include <__assert>
  10 #include <__support/ibm/xlocale.h>
  11 #include <sstream>
  12 #include <vector>
  13
  14 #ifdef __cplusplus
  15 extern "C" {
  16 #endif // __cplusplus
  17
  18 locale_t newlocale(int category_mask, const char* locale, locale_t base) {
  19   // Maintain current locale name(s) to restore later.
  20   std::string current_loc_name(setlocale(LC_ALL, 0));
  21
  22   // Check for errors.
  23   if (category_mask == LC_ALL_MASK && setlocale(LC_ALL, locale) == nullptr) {
  24     errno = EINVAL;
  25     return (locale_t)0;
  26   } else {
  27     for (int _Cat = 0; _Cat <= _LC_MAX; ++_Cat) {
  28       if ((_CATMASK(_Cat) & category_mask) != 0 && setlocale(_Cat, locale) == nullptr) {
  29         setlocale(LC_ALL, current_loc_name.c_str());
  30         errno = EINVAL;
  31         return (locale_t)0;
  32       }
  33     }
  34   }
  35
  36   // Create new locale.
  37   locale_t newloc = new locale_struct();
  38
  39   if (base) {
  40     if (category_mask != LC_ALL_MASK) {
  41       // Copy base when it will not be overwritten.
  42       memcpy(newloc, base, sizeof(locale_struct));
  43       newloc->category_mask = category_mask | base->category_mask;
  44     }
  45     delete base;
  46   } else {
  47     newloc->category_mask = category_mask;
  48   }
  49
  50   if (category_mask & LC_COLLATE_MASK)
  51     newloc->lc_collate = locale;
  52   if (category_mask & LC_CTYPE_MASK)
  53     newloc->lc_ctype = locale;
  54   if (category_mask & LC_MONETARY_MASK)
  55     newloc->lc_monetary = locale;
  56   if (category_mask & LC_NUMERIC_MASK)
  57     newloc->lc_numeric = locale;
  58   if (category_mask & LC_TIME_MASK)
  59     newloc->lc_time = locale;
  60   if (category_mask & LC_MESSAGES_MASK)
  61     newloc->lc_messages = locale;
  62
  63   // Restore current locale.
  64   setlocale(LC_ALL, current_loc_name.c_str());
  65   return (locale_t)newloc;
  66 }
  67
  68 void freelocale(locale_t locobj) { delete locobj; }
  69
  70 locale_t uselocale(locale_t newloc) {
  71   // Maintain current locale name(s).
  72   std::string current_loc_name(setlocale(LC_ALL, 0));
  73
  74   if (newloc) {
  75     // Set locales and check for errors.
  76     bool is_error =
  77         (newloc->category_mask & LC_COLLATE_MASK && setlocale(LC_COLLATE, newloc->lc_collate.c_str()) == nullptr) ||
  78         (newloc->category_mask & LC_CTYPE_MASK && setlocale(LC_CTYPE, newloc->lc_ctype.c_str()) == nullptr) ||
  79         (newloc->category_mask & LC_MONETARY_MASK && setlocale(LC_MONETARY, newloc->lc_monetary.c_str()) == nullptr) ||
  80         (newloc->category_mask & LC_NUMERIC_MASK && setlocale(LC_NUMERIC, newloc->lc_numeric.c_str()) == nullptr) ||
  81         (newloc->category_mask & LC_TIME_MASK && setlocale(LC_TIME, newloc->lc_time.c_str()) == nullptr) ||
  82         (newloc->category_mask & LC_MESSAGES_MASK && setlocale(LC_MESSAGES, newloc->lc_messages.c_str()) == nullptr);
  83
  84     if (is_error) {
  85       setlocale(LC_ALL, current_loc_name.c_str());
  86       errno = EINVAL;
  87       return (locale_t)0;
  88     }
  89   }
  90
  91   // Construct and return previous locale.
  92   locale_t previous_loc = new locale_struct();
  93
  94   // current_loc_name might be a comma-separated locale name list.
  95   if (current_loc_name.find(',') != std::string::npos) {
  96     // Tokenize locale name list.
  97     const char delimiter = ',';
  98     std::vector<std::string> tokenized;
  99     std::stringstream ss(current_loc_name);
 100     std::string s;
 101
 102     while (std::getline(ss, s, delimiter)) {
 103       tokenized.push_back(s);
 104     }
 105
 106     _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(tokenized.size() >= _NCAT, "locale-name list is too short");
 107
 108     previous_loc->lc_collate  = tokenized[LC_COLLATE];
 109     previous_loc->lc_ctype    = tokenized[LC_CTYPE];
 110     previous_loc->lc_monetary = tokenized[LC_MONETARY];
 111     previous_loc->lc_numeric  = tokenized[LC_NUMERIC];
 112     previous_loc->lc_time     = tokenized[LC_TIME];
 113     // Skip LC_TOD.
 114     previous_loc->lc_messages = tokenized[LC_MESSAGES];
 115   } else {
 116     previous_loc->lc_collate  = current_loc_name;
 117     previous_loc->lc_ctype    = current_loc_name;
 118     previous_loc->lc_monetary = current_loc_name;
 119     previous_loc->lc_numeric  = current_loc_name;
 120     previous_loc->lc_time     = current_loc_name;
 121     previous_loc->lc_messages = current_loc_name;
 122   }
 123
 124   previous_loc->category_mask = LC_ALL_MASK;
 125   return previous_loc;
 126 }
 127
 128 #ifdef __cplusplus
 129 }
 130 #endif // __cplusplus