Mercurial > hg > forks > gldragon

annotate dmutil.cpp @ 41:eaa3e8575c12

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Build system cleanups.
author Matti Hamalainen <ccr@tnsp.org>
date Thu, 05 Dec 2019 18:32:13 +0200
parents 03b86b9c2f29
children 9909014498f0
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1 //
22
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2 // GLDragon - OpenGL PLY model viewer / simple benchmark
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3 // -- Miscellaneous utility functions
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4 // Programmed and designed by Matti 'ccr' Hämäläinen <ccr@tnsp.org>
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5 // (C) Copyright 2019 Tecnic Software productions (TNSP)
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6 //
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7 // See file "COPYING" for license information.
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8 //
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9 #include "dmutil.h"
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10 #include <fstream>
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11
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13 std::string dmStrLTrim(const std::string& str, const std::string& delim)
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14 {
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15 return str.substr(str.find_first_not_of(delim));
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16 }
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17
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18
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19 std::string dmStrRTrim(const std::string& str, const std::string& delim)
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20 {
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21 return str.substr(0, str.find_last_not_of(delim));
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22 }
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23
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24
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25 std::string dmStrTrim(const std::string& str, const std::string& delim)
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26 {
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27 if (str.empty())
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28 return str;
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29
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30 size_t start = str.find_first_not_of(delim);
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31 return str.substr(start, str.find_last_not_of(delim) - start + 1);
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32 }
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33
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34
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35 std::vector<std::string> dmStrSplit(const std::string& str, const std::string& delim)
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36 {
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37 std::vector<std::string> result;
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38 size_t oldpos = 0, newpos;
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39
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40 do
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41 {
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42 newpos = str.find_first_of(delim, oldpos);
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43 std::string tmp = dmStrTrim(str.substr(oldpos, newpos - oldpos));
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44
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45 if (!tmp.empty())
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46 result.push_back(tmp);
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47
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48 oldpos = newpos + 1;
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49 } while (newpos != std::string::npos);
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50
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51 return result;
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52 }
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53
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54
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55 std::string dmStrJoin(const std::vector<std::string> &list, const std::string &delim)
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56 {
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57 switch (list.size())
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58 {
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59 case 0:
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60 return "";
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61
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62 case 1:
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63 return list[0];
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64
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65 default:
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66 std::string result;
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67 bool first = true;
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68 for (const auto &elem : list)
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69 {
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70 if (!first)
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71 result += delim;
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72 else
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73 first = false;
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74 result += elem;
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75 }
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76 return result;
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77 }
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78 }
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80
21
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81 std::string dmGetPath(const std::string &path)
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82 {
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83 size_t dirsep = path.find_last_of("/\\");
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84 return (dirsep != std::string::npos) ? path.substr(0, dirsep + 1) : "";
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85 }
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86
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87
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88 bool dmReadText(const std::string &filename, std::string &buf, const int maxSize)
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89 {
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90 std::ifstream in(filename.c_str(), std::fstream::in);
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91
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92 if (!in.is_open())
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93 {
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94 printf("ERROR: Unable to open file '%s'.\n",
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95 filename.c_str());
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96 return false;
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97 }
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98
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99 in.seekg(0, std::ios::end);
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100
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101 if (in.tellg() > maxSize)
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102 {
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103 printf("ERROR: File '%s' is too large.\n",
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104 filename.c_str());
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105 return false;
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106 }
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107
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108 buf.reserve(in.tellg());
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109 in.seekg(0, std::ios::beg);
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110
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111 buf.assign((std::istreambuf_iterator<char>(in)), std::istreambuf_iterator<char>());
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112
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113 return true;
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114 }
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115
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116
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117 bool dmFileExists(const std::string &filename, std::ios_base::openmode mode)
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118 {
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119 std::ifstream infile(filename.c_str(), mode);
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120 return infile.good();
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121 }