1 | /* |
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2 | * rom.c -- Support for ROMed page retrieval. |
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3 | * |
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4 | * Copyright (c) GoAhead Software Inc., 1995-2000. All Rights Reserved. |
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5 | * |
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6 | * See the file "license.txt" for usage and redistribution license requirements |
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7 | */ |
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8 | |
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9 | /******************************** Description *********************************/ |
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10 | |
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11 | /* |
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12 | * This module provides web page retrieval from compiled web pages. Use the |
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13 | * webcomp program to compile web pages and link into the GoAhead WebServer. |
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14 | * This module uses a hashed symbol table for fast page lookup. |
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15 | * |
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16 | * Usage: webcomp -f webPageFileList -p Prefix >webrom.c |
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17 | */ |
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18 | |
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19 | /********************************* Includes ***********************************/ |
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20 | |
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21 | #include <stdlib.h> |
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22 | |
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23 | #include "wsIntrn.h" |
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24 | |
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25 | /******************************** Local Data **********************************/ |
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26 | |
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27 | #if WEBS_PAGE_ROM |
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28 | |
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29 | sym_fd_t romTab; /* Symbol table for web pages */ |
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30 | |
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31 | /*********************************** Code *************************************/ |
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32 | /* |
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33 | * Open the ROM module |
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34 | */ |
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35 | |
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36 | int websRomOpen() |
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37 | { |
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38 | websRomPageIndexType *wip; |
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39 | int nchars; |
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40 | char_t name[SYM_MAX]; |
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41 | |
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42 | romTab = symOpen(WEBS_SYM_INIT); |
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43 | |
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44 | for (wip = websRomPageIndex; wip->path; wip++) { |
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45 | gstrncpy(name, wip->path, SYM_MAX); |
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46 | nchars = gstrlen(name) - 1; |
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47 | if (nchars > 0 && |
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48 | (name[nchars] == '/' || name[nchars] == '\\')) { |
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49 | name[nchars] = '\0'; |
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50 | } |
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51 | symEnter(romTab, name, valueInteger((int) wip), 0); |
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52 | } |
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53 | return 0; |
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54 | } |
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55 | |
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56 | /******************************************************************************/ |
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57 | /* |
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58 | * Close the ROM module |
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59 | */ |
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60 | |
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61 | void websRomClose() |
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62 | { |
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63 | symClose(romTab); |
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64 | } |
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65 | |
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66 | /******************************************************************************/ |
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67 | /* |
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68 | * Open a web page |
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69 | */ |
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70 | |
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71 | int websRomPageOpen(webs_t wp, char_t *path, int mode, int perm) |
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72 | { |
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73 | websRomPageIndexType *wip; |
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74 | sym_t *sp; |
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75 | |
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76 | a_assert(websValid(wp)); |
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77 | a_assert(path && *path); |
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78 | |
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79 | if ((sp = symLookup(romTab, path)) == NULL) { |
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80 | return -1; |
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81 | } |
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82 | wip = (websRomPageIndexType*) sp->content.value.integer; |
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83 | wip->pos = 0; |
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84 | return (wp->docfd = wip - websRomPageIndex); |
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85 | } |
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86 | |
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87 | /******************************************************************************/ |
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88 | /* |
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89 | * Close a web page |
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90 | */ |
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91 | |
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92 | void websRomPageClose(int fd) |
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93 | { |
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94 | } |
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95 | |
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96 | /******************************************************************************/ |
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97 | /* |
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98 | * Stat a web page |
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99 | */ |
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100 | |
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101 | int websRomPageStat(char_t *path, websStatType *sbuf) |
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102 | { |
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103 | websRomPageIndexType *wip; |
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104 | sym_t *sp; |
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105 | |
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106 | a_assert(path && *path); |
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107 | |
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108 | if ((sp = symLookup(romTab, path)) == NULL) { |
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109 | return -1; |
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110 | } |
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111 | wip = (websRomPageIndexType*) sp->content.value.integer; |
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112 | |
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113 | memset(sbuf, 0, sizeof(websStatType)); |
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114 | sbuf->size = wip->size; |
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115 | if (wip->page == NULL) { |
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116 | sbuf->isDir = 1; |
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117 | } |
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118 | return 0; |
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119 | } |
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120 | |
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121 | /******************************************************************************/ |
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122 | /* |
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123 | * Read a web page |
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124 | */ |
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125 | |
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126 | int websRomPageReadData(webs_t wp, char *buf, int nBytes) |
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127 | { |
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128 | websRomPageIndexType *wip; |
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129 | int len; |
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130 | |
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131 | a_assert(websValid(wp)); |
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132 | a_assert(buf); |
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133 | a_assert(wp->docfd >= 0); |
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134 | |
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135 | wip = &websRomPageIndex[wp->docfd]; |
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136 | |
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137 | len = min(wip->size - wip->pos, nBytes); |
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138 | memcpy(buf, &wip->page[wip->pos], len); |
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139 | wip->pos += len; |
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140 | return len; |
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141 | } |
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142 | |
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143 | /******************************************************************************/ |
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144 | /* |
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145 | * Position a web page |
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146 | */ |
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147 | |
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148 | long websRomPageSeek(webs_t wp, long offset, int origin) |
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149 | { |
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150 | websRomPageIndexType *wip; |
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151 | long pos; |
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152 | |
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153 | a_assert(websValid(wp)); |
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154 | a_assert(origin == SEEK_SET || origin == SEEK_CUR || origin == SEEK_END); |
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155 | a_assert(wp->docfd >= 0); |
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156 | |
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157 | wip = &websRomPageIndex[wp->docfd]; |
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158 | |
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159 | if (origin != SEEK_SET && origin != SEEK_CUR && origin != SEEK_END) { |
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160 | errno = EINVAL; |
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161 | return -1; |
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162 | } |
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163 | |
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164 | if (wp->docfd < 0) { |
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165 | errno = EBADF; |
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166 | return -1; |
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167 | } |
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168 | |
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169 | pos = offset; |
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170 | switch (origin) { |
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171 | case SEEK_CUR: |
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172 | pos = wip->pos + offset; |
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173 | break; |
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174 | case SEEK_END: |
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175 | pos = wip->size + offset; |
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176 | break; |
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177 | default: |
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178 | break; |
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179 | } |
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180 | |
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181 | if (pos < 0) { |
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182 | errno = EBADF; |
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183 | return -1; |
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184 | } |
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185 | |
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186 | return (wip->pos = pos); |
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187 | } |
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188 | |
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189 | #endif /* WEBS_PAGE_ROM */ |
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190 | |
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191 | /******************************************************************************/ |
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