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annotate dmutil.cpp @ 19:a329f0216491

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Implement PLY file format parsing and extremely simplistic scene setup file format. Not finished yet.
author Matti Hamalainen <ccr@tnsp.org>
date Thu, 07 Nov 2019 20:15:33 +0200
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children 1404dfcee7b8
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19
a329f0216491 Implement PLY file format parsing and extremely simplistic scene setup file format.
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1 //
a329f0216491 Implement PLY file format parsing and extremely simplistic scene setup file format.
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2 //
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3 //
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4 #include "dmutil.h"
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5 #include <fstream>
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6
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7
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8 std::string dmStrLTrim(const std::string& str, const std::string& delim)
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9 {
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10 return str.substr(str.find_first_not_of(delim));
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11 }
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12
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13
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14 std::string dmStrRTrim(const std::string& str, const std::string& delim)
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15 {
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16 return str.substr(0, str.find_last_not_of(delim));
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17 }
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19
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20 std::string dmStrTrim(const std::string& str, const std::string& delim)
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21 {
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22 if (str.empty())
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23 return str;
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24
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25 size_t start = str.find_first_not_of(delim);
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26 return str.substr(start, str.find_last_not_of(delim) - start + 1);
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27 }
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28
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29
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30 std::vector<std::string> dmStrSplit(const std::string& str, const std::string& delim)
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31 {
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32 std::vector<std::string> result;
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33 size_t oldpos = 0, newpos;
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34
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35 do
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36 {
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37 newpos = str.find_first_of(delim, oldpos);
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38 std::string tmp = dmStrTrim(str.substr(oldpos, newpos - oldpos));
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39
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40 if (!tmp.empty())
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41 result.push_back(tmp);
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42
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43 oldpos = newpos + 1;
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44 } while (newpos != std::string::npos);
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45
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46 return result;
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47 }
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48
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49
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50 std::string dmStrJoin(const std::vector<std::string> &list, const std::string &delim)
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51 {
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52 switch (list.size())
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53 {
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54 case 0:
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55 return "";
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56
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57 case 1:
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58 return list[0];
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59
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60 default:
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61 std::string result;
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62 bool first = true;
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63 for (const auto &elem : list)
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64 {
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65 if (!first)
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66 result += delim;
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67 else
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68 first = false;
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69 result += elem;
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70 }
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71 return result;
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72 }
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73 }
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74
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75
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76 bool dmReadText(const std::string &filename, std::string &buf, const int maxSize)
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77 {
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78 std::ifstream in(filename.c_str(), std::fstream::in);
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79
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80 if (!in.is_open())
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81 {
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82 printf("ERROR: Unable to open file '%s'.\n",
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83 filename.c_str());
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84 return false;
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85 }
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86
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87 in.seekg(0, std::ios::end);
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88
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89 if (in.tellg() > maxSize)
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90 {
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91 printf("ERROR: File '%s' is too large.\n",
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92 filename.c_str());
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93 return false;
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94 }
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95
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96 buf.reserve(in.tellg());
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97 in.seekg(0, std::ios::beg);
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98
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99 buf.assign((std::istreambuf_iterator<char>(in)), std::istreambuf_iterator<char>());
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100
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101 return true;
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102 }
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103
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104
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105 bool dmFileExists(const std::string &filename, std::ios_base::openmode mode)
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106 {
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107 std::ifstream infile(filename.c_str(), mode);
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108 return infile.good();
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109 }