1 | // This file is a part of Framsticks SDK. http://www.framsticks.com/ |
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2 | // Copyright (C) 1999-2019 Maciej Komosinski and Szymon Ulatowski. |
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3 | // See LICENSE.txt for details. |
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4 | |
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5 | #ifndef _VIRTFILE_H_ |
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6 | #define _VIRTFILE_H_ |
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7 | |
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8 | #include <stdio.h> |
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9 | #include <stdarg.h> |
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10 | #include <common/nonstd_dir.h> |
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11 | #include <string> |
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12 | #include <set> |
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13 | using std::string; |
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14 | |
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15 | #ifdef DLLEXPORTACTIVE //defined in the project that makes the DLL |
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16 | #define DLLEXP __declspec(dllexport) |
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17 | #else |
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18 | #ifdef __BORLANDC__ //assuming that all executables produced by borland use the DLL |
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19 | #define DLLEXP __declspec(dllimport) //without dllimport, fields in objects would have separate instances in DLL and in EXE |
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20 | #else |
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21 | #define DLLEXP |
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22 | #endif |
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23 | #endif |
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24 | |
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25 | class DLLEXP VirtFileSystem; |
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26 | |
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27 | class DLLEXP VirtFILE |
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28 | { |
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29 | protected: |
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30 | string path; |
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31 | public: |
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32 | virtual size_t Vread(void *ptr, size_t size, size_t nmemb) = 0; |
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33 | virtual size_t Vwrite(const void *ptr, size_t size, size_t nmemb) = 0; |
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34 | virtual int Veof() = 0; |
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35 | virtual int Vputc(int c) { unsigned char data = (unsigned char)c; return (Vwrite(&data, 1, 1) == 1) ? data : EOF; } |
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36 | virtual int Vputs(const char *s) = 0; |
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37 | virtual int Vgetc() { unsigned char data; if (Vread(&data, 1, 1) == 1) return data; else return EOF; } |
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38 | virtual int Vseek(long offset, int whence) = 0; |
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39 | virtual long Vtell() = 0; |
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40 | virtual void Vrewind() { Vseek(0, SEEK_SET); } |
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41 | virtual int Vflush() = 0; |
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42 | virtual char *Vgets(char *s, int size) = 0; |
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43 | virtual int Vprintf(const char *format, va_list args); |
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44 | int printf(const char *format, ...); |
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45 | virtual const char *VgetPath() { return path.c_str(); } |
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46 | virtual int getSize(); |
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47 | VirtFILE(const char* _path) :path(_path) {} |
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48 | virtual ~VirtFILE(); |
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49 | static VirtFILE *Vstdin, *Vstdout, *Vstderr; |
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50 | static void setVstdin(VirtFILE *); |
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51 | static void setVstdout(VirtFILE *); |
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52 | static void setVstderr(VirtFILE *); |
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53 | static VirtFILE* getVstdin(); |
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54 | static VirtFILE* getVstdout(); |
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55 | static VirtFILE* getVstderr(); |
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56 | static VirtFileSystem *vfs; |
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57 | static void selectFileSystem(VirtFileSystem *s); |
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58 | }; |
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59 | |
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60 | /** can be used directly or as a base class for implementations delegating VirtFILE calls to another VirtFILE object */ |
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61 | class DLLEXP DelegatedFILE : public VirtFILE |
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62 | { |
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63 | VirtFILE *delegate; |
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64 | public: |
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65 | size_t Vread(void *ptr, size_t size, size_t nmemb) { return delegate->Vread(ptr, size, nmemb); } |
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66 | size_t Vwrite(const void *ptr, size_t size, size_t nmemb) { return delegate->Vwrite(ptr, size, nmemb); } |
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67 | int Veof() { return delegate->Veof(); } |
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68 | int Vputc(int c) { return delegate->Vputc(c); } |
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69 | int Vputs(const char *s) { return delegate->Vputs(s); } |
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70 | int Vgetc() { return delegate->Vgetc(); } |
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71 | int Vseek(long offset, int whence) { return delegate->Vseek(offset, whence); } |
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72 | long Vtell() { return delegate->Vtell(); } |
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73 | void Vrewind() { delegate->Vrewind(); } |
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74 | int Vflush() { return delegate->Vflush(); } |
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75 | char *Vgets(char *s, int size) { return delegate->Vgets(s, size); } |
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76 | int Vprintf(const char *format, va_list args) { return delegate->Vprintf(format, args); } |
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77 | int getSize() { return delegate->getSize(); } |
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78 | // not overriden: VgetPath() |
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79 | |
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80 | DelegatedFILE(const char* _path, VirtFILE *_delegate) :VirtFILE(_path), delegate(_delegate) {} |
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81 | virtual ~DelegatedFILE() { if (delegate) delete delegate; delegate = NULL; } |
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82 | }; |
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83 | |
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84 | class DLLEXP VirtDIR |
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85 | { |
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86 | public: |
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87 | virtual ~VirtDIR() {} |
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88 | virtual dirent* Vreaddir() { return NULL; } |
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89 | }; |
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90 | |
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91 | class DLLEXP VirtFileSystem |
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92 | { |
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93 | public: |
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94 | virtual VirtFILE *Vfopen(const char* path, const char*mode); |
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95 | virtual bool Vfexists(const char* path); |
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96 | virtual VirtDIR *Vopendir(const char* path); |
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97 | virtual bool Vmkdir(const char* path); |
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98 | virtual bool Vmkdirs(const char* path); |
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99 | virtual bool Vdirexists(const char* path, bool is_writable); |
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100 | }; |
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101 | |
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102 | /// base class for chained filesystems - redirect unimplemented calls -> chain |
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103 | class DLLEXP ChainFileSystem : public VirtFileSystem |
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104 | { |
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105 | public: |
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106 | VirtFileSystem *chain; |
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107 | ChainFileSystem(VirtFileSystem *_chain = NULL); |
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108 | VirtFILE *Vfopen(const char* path, const char*mode); |
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109 | bool Vfexists(const char* path); |
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110 | VirtDIR *Vopendir(const char* path); |
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111 | virtual VirtDIR *internalopendir(const char* path) { return NULL; } |
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112 | bool Vmkdir(const char* path); |
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113 | bool Vmkdirs(const char* path); |
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114 | bool Vdirexists(const char* path, bool is_writable); |
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115 | |
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116 | class Dir : public VirtDIR |
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117 | { |
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118 | ChainFileSystem *first; |
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119 | VirtFileSystem *second; |
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120 | string path; |
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121 | std::set<string> duplicates; |
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122 | VirtDIR *dir; |
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123 | public: |
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124 | Dir(string _path, ChainFileSystem *_first, VirtFileSystem *_second) :first(_first), second(_second), path(_path), dir(NULL) {} |
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125 | ~Dir(); |
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126 | dirent* Vreaddir(); |
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127 | }; |
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128 | }; |
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129 | |
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130 | |
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131 | DLLEXP VirtFILE *Vfopen(const char* path, const char*mode); |
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132 | DLLEXP VirtDIR *Vopendir(const char* path); |
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133 | DLLEXP bool Vfexists(const char* path); |
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134 | DLLEXP bool Vmkdir(const char* path); |
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135 | DLLEXP bool Vmkdirs(const char* path); |
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136 | DLLEXP bool Vdirexists(const char* path, bool is_writable); |
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137 | |
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138 | #ifdef VIRTFILE_OVERLOADING |
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139 | //required for redefine_stdio.h and for building virtfile.dll, can also be used if someone prefers the standard f-functions instead of explicitly using virtfile objects |
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140 | |
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141 | DLLEXP size_t fread(void *ptr, size_t size, size_t nmemb, VirtFILE* f); |
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142 | DLLEXP size_t fwrite(const void *ptr, size_t size, size_t nmemb, VirtFILE* f); |
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143 | |
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144 | //since we want our own feof(VirtFILE*) function and some systems unfortunately define feof as a macro, we need to #undef it. Same as in virtfile.cpp |
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145 | #if defined _MSC_VER || defined __CYGWIN__ || defined SHP || defined __ANDROID__ |
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146 | #pragma push_macro("feof") |
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147 | #undef feof |
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148 | #endif |
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149 | #if defined __BORLANDC__ //does not support #pragma push_macro/pop_macro |
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150 | #undef feof |
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151 | #endif |
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152 | |
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153 | DLLEXP int feof(VirtFILE* f);// {return f->Veof();} |
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154 | |
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155 | //...and then restore the original macro: |
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156 | #if defined _MSC_VER || defined __CYGWIN__ || defined SHP || defined __ANDROID__ |
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157 | #pragma pop_macro("feof") |
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158 | #endif |
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159 | #if defined __BORLANDC__ |
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160 | #define feof(__f) ((__f)->flags & _F_EOF) |
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161 | #endif |
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162 | |
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163 | |
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164 | DLLEXP int fputc(int c, VirtFILE* f); |
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165 | DLLEXP int fputs(const char *s, VirtFILE* f); |
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166 | DLLEXP int fgetc(VirtFILE* f); |
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167 | DLLEXP int fseek(VirtFILE* f, long offset, int whence); |
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168 | DLLEXP int ftell(VirtFILE* f); |
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169 | DLLEXP void rewind(VirtFILE* f); |
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170 | DLLEXP int fflush(VirtFILE* f); |
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171 | DLLEXP char *fgets(char *s, int size, VirtFILE* f); |
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172 | DLLEXP int fprintf(VirtFILE* f, const char *format, ...); |
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173 | DLLEXP int fclose(VirtFILE* f); |
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174 | |
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175 | DLLEXP dirent* readdir(VirtDIR* d); |
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176 | DLLEXP int closedir(VirtDIR* d); |
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177 | |
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178 | #endif //VIRTFILE_OVERLOADING |
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179 | |
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180 | #endif |
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