src/gromacs/utility/strconvert.cpp

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  35 /*! \internal \file
  36  * \brief
  37  * Implements functions in strconvert.h.
  38  *
  39  * \author Teemu Murtola <teemu.murtola@gmail.com>
  40  * \ingroup module_utility
  41  */
  42 #include "gmxpre.h"
  43
  44 #include "strconvert.h"
  45
  46 #include <cerrno>
  47 #include <cstdlib>
  48
  49 #include <limits>
  50 #include <string>
  51
  52 #include "gromacs/utility/cstringutil.h"
  53 #include "gromacs/utility/exceptions.h"
  54
  55 namespace gmx
  56 {
  57
  58 //! \cond libapi
  59
  60 bool boolFromString(const char *value)
  61 {
  62     if (gmx_strcasecmp(value, "1") == 0
  63         || gmx_strcasecmp(value, "yes") == 0
  64         || gmx_strcasecmp(value, "true") == 0)
  65     {
  66         return true;
  67     }
  68     if (gmx_strcasecmp(value, "0") == 0
  69         || gmx_strcasecmp(value, "no") == 0
  70         || gmx_strcasecmp(value, "false") == 0)
  71     {
  72         return false;
  73     }
  74     GMX_THROW(InvalidInputError("Invalid value: '" + std::string(value) + "'; supported values are: 1, 0, yes, no, true, false"));
  75 }
  76
  77 int intFromString(const char *str)
  78 {
  79     errno = 0;
  80     char           *endptr;
  81     const long int  value = std::strtol(str, &endptr, 10);
  82     if (errno == ERANGE
  83         || value < std::numeric_limits<int>::min()
  84         || value > std::numeric_limits<int>::max())
  85     {
  86         GMX_THROW(InvalidInputError("Invalid value: '" + std::string(str)
  87                                     + "'; it causes an integer overflow"));
  88     }
  89     if (str[0] == '\0' || *endptr != '\0')
  90     {
  91         GMX_THROW(InvalidInputError("Invalid value: '" + std::string(str)
  92                                     + "'; expected an integer"));
  93     }
  94     return value;
  95 }
  96
  97 int64_t int64FromString(const char *str)
  98 {
  99     errno = 0;
 100     char              *endptr;
 101     const int64_t      value = str_to_int64_t(str, &endptr);
 102     if (errno == ERANGE)
 103     {
 104         GMX_THROW(InvalidInputError("Invalid value: '" + std::string(str)
 105                                     + "'; it causes an integer overflow"));
 106     }
 107     if (str[0] == '\0' || *endptr != '\0')
 108     {
 109         GMX_THROW(InvalidInputError("Invalid value: '" + std::string(str)
 110                                     + "'; expected an integer"));
 111     }
 112     return value;
 113 }
 114
 115 float floatFromString(const char *str)
 116 {
 117     errno = 0;
 118     char         *endptr;
 119     const double  value = std::strtod(str, &endptr);
 120     if (errno == ERANGE
 121         || value < -std::numeric_limits<float>::max()
 122         || value >  std::numeric_limits<float>::max())
 123     {
 124         GMX_THROW(InvalidInputError("Invalid value: '" + std::string(str)
 125                                     + "'; it causes an overflow/underflow"));
 126     }
 127     if (str[0] == '\0' || *endptr != '\0')
 128     {
 129         GMX_THROW(InvalidInputError("Invalid value: '" + std::string(str)
 130                                     + "'; expected a number"));
 131     }
 132     return value;
 133 }
 134
 135 double doubleFromString(const char *str)
 136 {
 137     errno = 0;
 138     char         *endptr;
 139     const double  value = std::strtod(str, &endptr);
 140     if (errno == ERANGE)
 141     {
 142         GMX_THROW(InvalidInputError("Invalid value: '" + std::string(str)
 143                                     + "'; it causes an overflow/underflow"));
 144     }
 145     if (str[0] == '\0' || *endptr != '\0')
 146     {
 147         GMX_THROW(InvalidInputError("Invalid value: '" + std::string(str)
 148                                     + "'; expected a number"));
 149     }
 150     return value;
 151 }
 152
 153 //! \endcond
 154
 155 } // namespace gmx