1 | // This file is a part of the Framsticks GDK library.
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2 | // Copyright (C) 2002-2011 Szymon Ulatowski. See LICENSE.txt for details.
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3 | // Refer to http://www.framsticks.com/ for further information.
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4 |
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5 | #include "multiparamload.h"
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6 | #include "framsg.h"
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7 | #include <ctype.h>
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8 |
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9 | void MultiParamLoader::init()
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10 | {
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11 | file=0; ownfile=0;
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12 | status=0;
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13 | reset();
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14 | }
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15 |
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16 | void MultiParamLoader::reset()
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17 | {
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18 | status=0;
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19 | breakcond=OnError;
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20 | emptyparam.setParamTab(empty_paramtab);
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21 | }
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22 |
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23 | void MultiParamLoader::load()
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24 | {
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25 | clearstack();
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26 | if (!file)
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27 | {
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28 | lasterror="can't open file";
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29 | status=OnError;
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30 | return;
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31 | }
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32 | status=Loading;
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33 | }
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34 |
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35 | void MultiParamLoader::abort()
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36 | {
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37 | if (file && ownfile)
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38 | {
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39 | fclose(file);
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40 | file=0;
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41 | }
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42 | clearstack();
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43 | status=Finished;
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44 | }
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45 |
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46 | void MultiParamLoader::load(VirtFILE *f)
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47 | {
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48 | abort();
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49 | ownfile=0;
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50 | file=f;
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51 | load();
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52 | }
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53 |
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54 | void MultiParamLoader::load(const char* filename)
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55 | {
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56 | abort();
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57 | ownfile=1;
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58 | file=Vfopen(filename,FOPEN_READ);
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59 | load();
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60 | }
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61 |
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62 | static int isEOL(char ch)
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63 | {
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64 | return (ch=='\n')||(ch=='\r');
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65 | }
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66 |
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67 | static char* fgets0(char*t,int d,VirtFILE *f,int &linlen)
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68 | {
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69 | char *r=fgets(t,d,f);
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70 | if (r)
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71 | {
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72 | int d=strlen(r);
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73 | if (d && isEOL(r[d-1])) { d--; if (d && isEOL(r[d-1])) d--; }
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74 | linlen=d;
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75 | r[d]=0;
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76 | }
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77 | else
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78 | linlen=0;
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79 | return r;
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80 | }
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81 |
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82 | static char* trim(char*t,int &linlen)
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83 | {
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84 | char *x=t;
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85 | while(isspace(*x)) x++;
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86 | linlen-=(x-t);
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87 | t=x;
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88 | if (!linlen) return t;
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89 | x=t+linlen-1;
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90 | while(isspace(*x)) x--;
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91 | x[1]=0;
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92 | linlen=x-t+1;
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93 | return t;
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94 | }
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95 |
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96 | int MultiParamLoader::go()
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97 | {
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98 | char buf[100];
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99 | char *t;
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100 | int linlen;
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101 | if (status==OnError) return status;
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102 | while (!finished())
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103 | {
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104 | if ((status==BeforeObject) || ((status==BeforeUnknown)&&lastclass))
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105 | {
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106 | lastclass->load(file);
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107 | if ((status!=Finished) && maybeBreak(AfterObject))
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108 | break;
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109 | continue;
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110 | }
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111 | else if (status==BeforeUnknown)
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112 | {
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113 | loadObjectNow(&emptyparam);
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114 | continue;
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115 | }
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116 | t=fgets0(buf,100,file,linlen);
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117 | if (!t)
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118 | {
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119 | if (!returnFromIncluded())
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120 | {
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121 | abort();
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122 | break;
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123 | }
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124 | else
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125 | continue;
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126 | }
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127 | if (buf[0]=='#')
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128 | {
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129 | if (!strncmp(buf+1,"include",7))
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130 | {
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131 | const char* t=strchr(buf,'\"'),*t2=0;
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132 | if (t) t2=strchr(t+1,'\"');
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133 | if (t2)
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134 | {
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135 | SString filename(t+1,t2-t-1);
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136 | include(filename);
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137 | }
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138 | else
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139 | {
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140 | const char* thisfilename=file->VgetPath();
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141 | FMprintf("MultiParamLoader","go",FMLV_WARN,"invalid \"%s\"%s%s",buf,
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142 | (thisfilename?" in ":""),(thisfilename?thisfilename:""));
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143 | }
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144 | continue;
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145 | }
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146 | else if ((status!=Finished) && maybeBreak(OnComment))
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147 | {
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148 | lastcomment=t+1;
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149 | break;
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150 | }
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151 | }
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152 | t=trim(buf,linlen);
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153 | if ((linlen>1)&&(t[linlen-1]==':'))
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154 | {
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155 | lastunknown=0;
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156 | lastunknown.append(t,linlen-1);
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157 | lastclass=0;
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158 | FOREACH(ParamInterface*,pi,params)
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159 | {
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160 | if (!strcmp(pi->getName(),lastunknown)) { lastclass=pi; break; }
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161 | }
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162 | if (lastclass)
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163 | {
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164 | if (maybeBreak(BeforeObject))
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165 | break;
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166 | }
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167 | else
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168 | {
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169 | if (maybeBreak(BeforeUnknown))
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170 | break;
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171 | }
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172 |
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173 | }
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174 | }
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175 | return status;
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176 | }
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177 |
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178 | bool MultiParamLoader::alreadyIncluded(const char* filename)
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179 | {
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180 | int i;
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181 | const char* t;
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182 | for(i=0;i<filestack.size();i++)
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183 | {
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184 | t=filestack(i)->VgetPath();
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185 | if (!t) continue;
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186 | if (!strcmp(filename,t)) return true;
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187 | }
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188 | return false;
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189 | }
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190 |
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191 | void MultiParamLoader::include(SString& filename)
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192 | {
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193 | const char* thisfilename=file->VgetPath();
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194 | SString newfilename;
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195 | const char* t=thisfilename?strrchr(thisfilename,PATHSEPARATORCHAR):0;
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196 |
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197 | if (thisfilename && t)
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198 | {
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199 | newfilename.append(thisfilename,t-thisfilename+1);
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200 | newfilename+=filename;
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201 | }
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202 | else
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203 | newfilename=filename;
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204 |
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205 | if (alreadyIncluded(newfilename))
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206 | {
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207 | FMprintf("MultiParamLoader","include",FMLV_WARN,"circular reference ignored (\"%s\")",
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208 | (const char*)filename);
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209 | return;
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210 | }
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211 |
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212 | VirtFILE *f=Vfopen(newfilename,FOPEN_READ);
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213 | if (!f)
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214 | {
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215 | FMprintf("MultiParamLoader","include",FMLV_WARN,"\"%s\" not found",(const char*)newfilename);
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216 | }
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217 | else
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218 | {
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219 | filestack+=file;
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220 | file=f;
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221 | }
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222 | }
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223 |
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224 | VirtFILE* MultiParamLoader::popstack()
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225 | {
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226 | if (!filestack.size()) return 0;
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227 | VirtFILE* f=filestack(filestack.size()-1);
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228 | filestack.remove(filestack.size()-1);
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229 | return f;
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230 | }
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231 |
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232 | void MultiParamLoader::clearstack()
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233 | {
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234 | VirtFILE *f;
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235 | while(f=popstack()) fclose(f);
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236 | }
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237 |
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238 | bool MultiParamLoader::returnFromIncluded()
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239 | {
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240 | if (!filestack.size()) return false;
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241 | if (file) fclose(file);
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242 | file=popstack();
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243 | return true;
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244 | }
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245 |
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246 | int MultiParamLoader::loadObjectNow(ParamInterface *pi)
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247 | {
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248 | pi->load(file);
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249 | status=AfterObject;
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250 | return 0;
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251 | }
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252 |
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253 | int MultiParamLoader::run()
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254 | {
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255 | int stat;
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256 | breakOn(OnError);
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257 | while(stat=go())
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258 | if (stat==OnError)
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259 | {
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260 | abort();
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261 | return 0;
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262 | }
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263 | return 1;
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264 | }
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