1 | /**************************************** |
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2 | * Computer Algebra System SINGULAR * |
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3 | ****************************************/ |
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4 | /* |
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5 | * ABSTRACT: help system |
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6 | */ |
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7 | |
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8 | #include "kernel/mod2.h" |
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9 | #include "omalloc/omalloc.h" |
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10 | #include "misc/mylimits.h" |
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11 | #include "resources/feResource.h" |
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12 | #include "reporter/reporter.h" |
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13 | #include "resources/omFindExec.h" |
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14 | #include "reporter/si_signals.h" |
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15 | |
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16 | #include "ipid.h" |
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17 | #include "ipshell.h" |
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18 | #include "libparse.h" |
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19 | #include "feOpt.h" |
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20 | |
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21 | #include "tok.h" |
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22 | #include "fehelp.h" |
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23 | |
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24 | /***************************************************************** |
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25 | * |
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26 | * Declarations: Data structures |
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27 | * |
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28 | *****************************************************************/ |
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29 | #define MAX_HE_ENTRY_LENGTH 160 |
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30 | typedef struct |
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31 | { |
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32 | char key[MAX_HE_ENTRY_LENGTH]; |
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33 | char node[MAX_HE_ENTRY_LENGTH]; |
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34 | char url[MAX_HE_ENTRY_LENGTH]; |
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35 | long chksum; |
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36 | } heEntry_s; |
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37 | typedef heEntry_s * heEntry; |
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38 | |
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39 | typedef void (*heBrowserHelpProc)(heEntry hentry, int br); |
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40 | typedef BOOLEAN (*heBrowserInitProc)(int warn, int br); |
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41 | |
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42 | typedef struct |
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43 | { |
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44 | const char* browser; |
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45 | heBrowserInitProc init_proc; |
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46 | heBrowserHelpProc help_proc; |
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47 | const char* required; |
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48 | const char* action; |
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49 | } heBrowser_s; |
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50 | typedef heBrowser_s * heBrowser; |
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51 | |
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52 | /***************************************************************** |
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53 | * |
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54 | * Declarations: Local functions |
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55 | * |
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56 | *****************************************************************/ |
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57 | static char* strclean(char* str); |
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58 | static BOOLEAN heKey2Entry(char* filename, char* key, heEntry hentry); |
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59 | static int heReKey2Entry (char* filename, char* key, heEntry hentry); |
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60 | static BOOLEAN strmatch(char* s, char* re); |
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61 | static BOOLEAN heOnlineHelp(char* s); |
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62 | static void heBrowserHelp(heEntry hentry); |
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63 | static long heKeyChksum(char* key); |
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64 | |
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65 | // browser functions |
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66 | static BOOLEAN heGenInit(int,int); static void heGenHelp(heEntry hentry,int); |
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67 | static void heBuiltinHelp(heEntry hentry,int); |
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68 | static BOOLEAN heDummyInit(int,int); static void heDummyHelp(heEntry hentry,int); |
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69 | static BOOLEAN heEmacsInit(int,int); static void heEmacsHelp(heEntry hentry,int); |
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70 | |
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71 | STATIC_VAR heBrowser heCurrentHelpBrowser = NULL; |
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72 | STATIC_VAR int heCurrentHelpBrowserIndex= -1; |
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73 | |
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74 | |
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75 | /***************************************************************** |
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76 | * |
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77 | * Definition: available help browsers |
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78 | * |
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79 | *****************************************************************/ |
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80 | // order is important -- first possible help is chosen |
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81 | // moved to LIB/help.cnf |
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82 | STATIC_VAR heBrowser_s *heHelpBrowsers=NULL; |
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83 | |
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84 | /***************************************************************** |
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85 | * |
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86 | * Implementation: public function |
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87 | * |
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88 | *****************************************************************/ |
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89 | void feHelp(char *str) |
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90 | { |
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91 | str = strclean(str); |
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92 | if (str == NULL) {heBrowserHelp(NULL); return;} |
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93 | |
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94 | if (strlen(str) > MAX_HE_ENTRY_LENGTH - 2) // need room for extra ** |
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95 | str[MAX_HE_ENTRY_LENGTH - 3] = '\0'; |
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96 | |
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97 | BOOLEAN key_is_regexp = (strchr(str, '*') != NULL); |
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98 | |
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99 | |
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100 | heEntry_s hentry; |
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101 | memset(&hentry,0,sizeof(hentry)); |
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102 | char* idxfile = feResource('x' /*"IdxFile"*/); |
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103 | |
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104 | // Try exact match of help string with key in index |
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105 | if (!key_is_regexp && (idxfile != NULL) && heKey2Entry(idxfile, str, &hentry)) |
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106 | { |
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107 | heBrowserHelp(&hentry); |
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108 | return; |
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109 | } |
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110 | |
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111 | // Try to match approximately with key in index file |
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112 | if (idxfile != NULL) |
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113 | { |
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114 | if (heCurrentHelpBrowser == NULL) feHelpBrowser(NULL, 0); |
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115 | assume(heCurrentHelpBrowser != NULL); |
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116 | |
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117 | StringSetS(""); |
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118 | int found = heReKey2Entry(idxfile, str, &hentry); |
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119 | |
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120 | |
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121 | if (found == 0) |
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122 | { |
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123 | // try proc help and library help |
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124 | if (! key_is_regexp && heOnlineHelp(str)) return; |
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125 | |
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126 | // Try to match with str* |
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127 | char mkey[MAX_HE_ENTRY_LENGTH]; |
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128 | strcpy(mkey, str); |
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129 | strcat(mkey, "*"); |
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130 | found = heReKey2Entry(idxfile, mkey, &hentry); |
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131 | // Try to match with *str* |
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132 | if (found == 0) |
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133 | { |
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134 | mkey[0] = '*'; |
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135 | strcpy(mkey + 1, str); |
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136 | strcat(mkey, "*"); |
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137 | found = heReKey2Entry(idxfile, mkey, &hentry); |
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138 | } |
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139 | |
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140 | // Print warning and return if nothing found |
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141 | if (found == 0) |
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142 | { |
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143 | Warn("No help for topic '%s' (not even for '*%s*')", str, str); |
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144 | WarnS("Try '?;' for general help"); |
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145 | WarnS("or '?Index;' for all available help topics."); |
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146 | return; |
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147 | } |
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148 | } |
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149 | |
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150 | // do help if unique match was found |
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151 | if (found == 1) |
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152 | { |
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153 | heBrowserHelp(&hentry); |
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154 | return; |
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155 | } |
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156 | // Print warning about multiple matches and return |
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157 | if (key_is_regexp) |
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158 | Warn("No unique help for '%s'", str); |
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159 | else |
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160 | Warn("No help for topic '%s'", str); |
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161 | WarnS("Try one of"); |
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162 | char *matches=StringEndS(); |
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163 | PrintS(matches); |
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164 | omFree(matches); |
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165 | PrintLn(); |
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166 | return; |
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167 | } |
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168 | |
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169 | // no idx file, let Browsers deal with it, if they can |
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170 | strcpy(hentry.key, str); |
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171 | *hentry.node = '\0'; |
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172 | *hentry.url = '\0'; |
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173 | hentry.chksum = 0; |
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174 | heBrowserHelp(&hentry); |
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175 | } |
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176 | static void feBrowserFile() |
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177 | { |
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178 | FILE *f=feFopen("help.cnf","r",NULL,TRUE); |
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179 | int br=0; |
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180 | if (f!=NULL) |
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181 | { |
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182 | char buf[512]; |
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183 | while (fgets( buf, sizeof(buf), f)) |
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184 | { |
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185 | if ((buf[0]!='#') && (buf[0]>' ')) br++; |
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186 | } |
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187 | fseek(f,0,SEEK_SET); |
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188 | // for the 4(!) default browsers |
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189 | heHelpBrowsers=(heBrowser_s*)omAlloc0((br+4)*sizeof(heBrowser_s)); |
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190 | br = 0; |
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191 | while (fgets( buf, sizeof(buf), f)) |
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192 | { |
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193 | if ((buf[0]!='#') && (buf[0]>' ')) |
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194 | { |
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195 | char *name=strtok(buf,"!"); |
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196 | char *req=strtok(NULL,"!"); |
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197 | char *cmd=strtok(NULL,"!"); |
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198 | if ((name!=NULL) && (req!=NULL) && (cmd!=NULL)) |
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199 | { |
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200 | while ((cmd[0]!='\0') && (cmd[strlen(cmd)-1]<=' ')) |
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201 | cmd[strlen(cmd)-1]='\0'; |
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202 | //Print("name %d >>%s<<\n\treq:>>%s<<\n\tcmd:>>%s<<\n",br,name,req,cmd); |
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203 | heHelpBrowsers[br].browser=(char *)omStrDup(name); |
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204 | heHelpBrowsers[br].init_proc=heGenInit; |
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205 | heHelpBrowsers[br].help_proc=heGenHelp; |
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206 | heHelpBrowsers[br].required=omStrDup(req); |
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207 | heHelpBrowsers[br].action=omStrDup(cmd); |
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208 | br++; |
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209 | } |
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210 | else |
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211 | { |
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212 | Print("syntax error in help.cnf, at line starting with %s\n",buf); |
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213 | } |
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214 | } |
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215 | } |
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216 | fclose(f); |
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217 | } |
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218 | else |
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219 | { |
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220 | // for the 4(!) default browsers |
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221 | heHelpBrowsers=(heBrowser_s*)omAlloc0(4*sizeof(heBrowser_s)); |
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222 | } |
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223 | heHelpBrowsers[br].browser="builtin"; |
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224 | heHelpBrowsers[br].init_proc=heGenInit; |
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225 | heHelpBrowsers[br].help_proc=heBuiltinHelp; |
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226 | heHelpBrowsers[br].required="i"; |
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227 | //heHelpBrowsers[br].action=NULL; |
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228 | br++; |
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229 | heHelpBrowsers[br].browser="dummy"; |
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230 | heHelpBrowsers[br].init_proc=heDummyInit; |
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231 | heHelpBrowsers[br].help_proc=heDummyHelp; |
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232 | //heHelpBrowsers[br].required=NULL; |
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233 | //heHelpBrowsers[br].action=NULL; |
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234 | br++; |
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235 | heHelpBrowsers[br].browser="emacs"; |
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236 | heHelpBrowsers[br].init_proc=heEmacsInit; |
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237 | heHelpBrowsers[br].help_proc=heEmacsHelp; |
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238 | //heHelpBrowsers[br].required=NULL; |
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239 | //heHelpBrowsers[br].action=NULL; |
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240 | //br++; |
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241 | //heHelpBrowsers[br].browser=NULL; |
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242 | //heHelpBrowsers[br].init_proc=NULL; |
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243 | //heHelpBrowsers[br].help_proc=NULL; |
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244 | //heHelpBrowsers[br].required=NULL; |
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245 | //heHelpBrowsers[br].action=NULL; |
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246 | } |
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247 | |
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248 | const char* feHelpBrowser(char* which, int warn) |
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249 | { |
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250 | int i = 0; |
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251 | |
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252 | // if no argument, choose first available help browser |
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253 | if (heHelpBrowsers==NULL) feBrowserFile(); |
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254 | if (which == NULL || *which == '\0') |
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255 | { |
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256 | // return, if already set |
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257 | if (heCurrentHelpBrowser != NULL) |
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258 | return heCurrentHelpBrowser->browser; |
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259 | |
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260 | // First, try emacs, if emacs-option is set |
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261 | if (feOptValue(FE_OPT_EMACS) != NULL) |
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262 | { |
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263 | while (heHelpBrowsers[i].browser != NULL) |
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264 | { |
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265 | if (strcmp(heHelpBrowsers[i].browser, "emacs") == 0 && |
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266 | (heHelpBrowsers[i].init_proc(0,i))) |
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267 | { |
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268 | heCurrentHelpBrowser = &(heHelpBrowsers[i]); |
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269 | heCurrentHelpBrowserIndex=i; |
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270 | goto Finish; |
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271 | } |
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272 | i++; |
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273 | } |
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274 | i=0; |
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275 | } |
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276 | while (heHelpBrowsers[i].browser != NULL) |
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277 | { |
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278 | if (heHelpBrowsers[i].init_proc(0,i)) |
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279 | { |
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280 | heCurrentHelpBrowser = &(heHelpBrowsers[i]); |
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281 | heCurrentHelpBrowserIndex=i; |
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282 | goto Finish; |
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283 | } |
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284 | i++; |
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285 | } |
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286 | // should never get here |
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287 | dReportBug("should never get here"); |
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288 | } |
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289 | |
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290 | // with argument, find matching help browser |
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291 | while (heHelpBrowsers[i].browser != NULL && |
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292 | strcmp(heHelpBrowsers[i].browser, which) != 0) |
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293 | {i++;} |
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294 | |
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295 | if (heHelpBrowsers[i].browser == NULL) |
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296 | { |
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297 | if (warn) Warn("No help browser '%s' available.", which); |
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298 | } |
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299 | else |
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300 | { |
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301 | // see whether we can init it |
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302 | if (heHelpBrowsers[i].init_proc(warn,i)) |
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303 | { |
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304 | heCurrentHelpBrowser = &(heHelpBrowsers[i]); |
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305 | heCurrentHelpBrowserIndex=i; |
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306 | goto Finish; |
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307 | } |
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308 | } |
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309 | |
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310 | // something went wrong |
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311 | if (heCurrentHelpBrowser == NULL) |
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312 | { |
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313 | feHelpBrowser(); |
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314 | assume(heCurrentHelpBrowser != NULL); |
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315 | if (warn) |
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316 | Warn("Setting help browser to '%s'.", heCurrentHelpBrowser->browser); |
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317 | return heCurrentHelpBrowser->browser; |
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318 | } |
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319 | else |
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320 | { |
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321 | // or, leave as is |
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322 | if (warn) |
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323 | Warn("Help browser stays at '%s'.", heCurrentHelpBrowser->browser); |
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324 | return heCurrentHelpBrowser->browser; |
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325 | } |
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326 | |
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327 | Finish: |
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328 | // update value of Browser Option |
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329 | if (feOptSpec[FE_OPT_BROWSER].value == NULL || |
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330 | strcmp((char*) feOptSpec[FE_OPT_BROWSER].value, |
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331 | heCurrentHelpBrowser->browser) != 0) |
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332 | { |
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333 | omfree(feOptSpec[FE_OPT_BROWSER].value); |
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334 | feOptSpec[FE_OPT_BROWSER].value |
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335 | = (void*) omStrDup(heCurrentHelpBrowser->browser); |
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336 | } |
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337 | return heCurrentHelpBrowser->browser; |
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338 | } |
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339 | |
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340 | void feStringAppendBrowsers(int warn) |
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341 | { |
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342 | int i; |
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343 | StringAppendS("Available HelpBrowsers: "); |
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344 | |
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345 | i = 0; |
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346 | if (heHelpBrowsers==NULL) feBrowserFile(); |
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347 | while (heHelpBrowsers[i].browser != NULL) |
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348 | { |
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349 | if (heHelpBrowsers[i].init_proc(warn,i)) |
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350 | StringAppend("%s, ", heHelpBrowsers[i].browser); |
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351 | i++; |
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352 | } |
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353 | StringAppend("\nCurrent HelpBrowser: %s ", feHelpBrowser()); |
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354 | } |
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355 | |
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356 | |
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357 | /***************************************************************** |
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358 | * |
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359 | * Implementation: local function |
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360 | * |
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361 | *****************************************************************/ |
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362 | // Remove whitspaces from beginning and end, return NULL if only whitespaces |
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363 | static char* strclean(char* str) |
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364 | { |
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365 | if (str == NULL) return NULL; |
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366 | char *s=str; |
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367 | while ((*s <= ' ') && (*s != '\0')) s++; |
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368 | if (*s == '\0') return NULL; |
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369 | char *ss=s; |
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370 | while (*ss!='\0') ss++; |
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371 | ss--; |
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372 | while ((*ss <= ' ') && (*ss != '\0')) |
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373 | { |
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374 | *ss='\0'; |
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375 | ss--; |
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376 | } |
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377 | if (*ss == '\0') return NULL; |
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378 | return s; |
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379 | } |
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380 | |
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381 | // Finds help entry for key: |
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382 | // returns filled-in hentry and TRUE, on success |
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383 | // FALSE, on failure |
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384 | // Assumes that lines of idx file have the following form |
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385 | // key\tnode\turl\tchksum\n (chksum ma be empty, then it is set to -1) |
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386 | // and that lines are sorted alpahbetically w.r.t. index entries |
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387 | static BOOLEAN heKey2Entry(char* filename, char* key, heEntry hentry) |
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388 | { |
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389 | FILE* fd; |
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390 | int c, k; |
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391 | int kl, i; |
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392 | *(hentry->key) = '\0'; |
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393 | *(hentry->url) = '\0'; |
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394 | *(hentry->node) = '\0'; |
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395 | hentry->chksum = 0; |
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396 | if (filename == NULL || key == NULL) return FALSE; |
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397 | fd = fopen(filename, "r"); |
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398 | if (fd == NULL) return FALSE; |
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399 | kl = strlen(key); |
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400 | |
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401 | k = key[0]; |
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402 | i = 0; |
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403 | while ((c = getc(fd)) != EOF) |
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404 | { |
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405 | if (c < k) |
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406 | { |
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407 | /* Skip line */ |
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408 | while (getc(fd) != '\n') {}; |
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409 | if (i) |
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410 | { |
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411 | i=0; |
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412 | k=key[0]; |
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413 | } |
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414 | } |
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415 | else if (c == k) |
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416 | { |
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417 | i++; |
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418 | if (i == kl) |
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419 | { |
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420 | // \t must follow, otherwise only substring match |
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421 | if (getc(fd) != '\t') goto Failure; |
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422 | |
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423 | // Now we found an exact match |
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424 | if (hentry->key != key) strcpy(hentry->key, key); |
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425 | // get node |
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426 | i = 0; |
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427 | while ((c = getc(fd)) != '\t' && c != EOF) |
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428 | { |
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429 | hentry->node[i] = c; |
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430 | i++; |
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431 | } |
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432 | if (c == EOF) goto Failure; |
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433 | if (hentry->node[0]=='\0') |
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434 | strcpy(hentry->node,hentry->key); |
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435 | |
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436 | // get url |
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437 | //hentry->node[i] = '\0'; |
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438 | i = 0; |
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439 | while ((c = getc(fd)) != '\t' && c != EOF) |
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440 | { |
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441 | hentry->url[i] = c; |
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442 | i++; |
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443 | } |
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444 | if (c == EOF) goto Failure; |
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445 | |
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446 | // get chksum |
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447 | hentry->url[i] = '\0'; |
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448 | |
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449 | if (si_fscanf(fd, "%ld\n", &(hentry->chksum)) != 1) |
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450 | { |
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451 | hentry->chksum = -1; |
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452 | } |
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453 | fclose(fd); |
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454 | return TRUE; |
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455 | } |
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456 | else if (i > kl) |
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457 | { |
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458 | goto Failure; |
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459 | } |
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460 | else |
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461 | { |
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462 | k = key[i]; |
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463 | } |
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464 | } |
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465 | else |
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466 | { |
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467 | goto Failure; |
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468 | } |
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469 | } |
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470 | Failure: |
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471 | fclose(fd); |
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472 | return FALSE; |
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473 | } |
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474 | |
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475 | // return TRUE if s matches re |
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476 | // FALSE, otherwise |
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477 | // does not distinguish lower and upper cases |
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478 | // inteprets * as wildcard |
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479 | static BOOLEAN strmatch(char* s, char* re) |
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480 | { |
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481 | if (s == NULL || *s == '\0') |
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482 | return (re == NULL || *re == '\0' || strcmp(re, "*") == 0); |
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483 | if (re == NULL || *re == '\0') return FALSE; |
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484 | |
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485 | int i; |
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486 | char ls[MAX_HE_ENTRY_LENGTH + 1]; |
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487 | char rs[MAX_HE_ENTRY_LENGTH + 1]; |
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488 | char *l, *r, *ll, *rr; |
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489 | |
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490 | // make everything to lower case |
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491 | i=1; |
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492 | ls[0] = '\0'; |
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493 | do |
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494 | { |
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495 | if (*s >= 'A' && *s <= 'Z') ls[i] = *s + ('a' - 'A'); |
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496 | else ls[i] = *s; |
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497 | i++; |
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498 | s++; |
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499 | } while (*s != '\0'); |
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500 | ls[i] = '\0'; |
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501 | l = &(ls[1]); |
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502 | |
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503 | i=1; |
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504 | rs[0] = '\0'; |
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505 | do |
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506 | { |
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507 | if (*re >= 'A' && *re <= 'Z') rs[i]= *re + ('a' - 'A'); |
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508 | else rs[i] = *re; |
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509 | i++; |
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510 | re++; |
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511 | } while (*re != '\0'); |
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512 | rs[i] = '\0'; |
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513 | r = &(rs[1]); |
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514 | |
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515 | // chopp of exact matches from beginning and end |
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516 | while (*r != '*' && *r != '\0' && *l != '\0') |
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517 | { |
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518 | if (*r != *l) return FALSE; |
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519 | *r = '\0'; |
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520 | *s = '\0'; |
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521 | r++; |
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522 | l++; |
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523 | } |
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524 | if (*r == '\0') return (*l == '\0'); |
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525 | if (*r == '*' && r[1] == '\0') return TRUE; |
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526 | if (*l == '\0') return FALSE; |
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527 | |
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528 | rr = &r[strlen(r) - 1]; |
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529 | ll = &l[strlen(l) - 1]; |
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530 | while (*rr != '*' && *rr != '\0' && *ll != '\0') |
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531 | { |
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532 | if (*rr != *ll) return FALSE; |
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533 | *rr = '\0'; |
---|
534 | *ll = '\0'; |
---|
535 | rr--; |
---|
536 | ll--; |
---|
537 | } |
---|
538 | if (*rr == '\0') return (*ll == '\0'); |
---|
539 | if (*rr == '*' && rr[-1] == '\0') return TRUE; |
---|
540 | if (*ll == '\0') return FALSE; |
---|
541 | |
---|
542 | // now *r starts with a * and ends with a * |
---|
543 | r++; |
---|
544 | *rr = '\0'; rr--; |
---|
545 | while (*r != '\0') |
---|
546 | { |
---|
547 | rr = r + 1; |
---|
548 | while (*rr != '*' && *rr != '\0') rr++; |
---|
549 | if (*rr == '*') |
---|
550 | { |
---|
551 | *rr = '\0'; |
---|
552 | rr++; |
---|
553 | } |
---|
554 | l = strstr(l, r); |
---|
555 | if (l == NULL) return FALSE; |
---|
556 | r = rr; |
---|
557 | } |
---|
558 | return TRUE; |
---|
559 | } |
---|
560 | |
---|
561 | // similar to heKey2Entry, except that |
---|
562 | // key is taken as regexp (see above) |
---|
563 | // and number of matches is returned |
---|
564 | // if number of matches > 0, then hentry contains entry for first match |
---|
565 | // if number of matches > 1, matches are printed as komma-separated |
---|
566 | // into global string |
---|
567 | static int heReKey2Entry (char* filename, char* key, heEntry hentry) |
---|
568 | { |
---|
569 | int i = 0; |
---|
570 | FILE* fd; |
---|
571 | char index_key[MAX_HE_ENTRY_LENGTH]; |
---|
572 | |
---|
573 | if (filename == NULL || key == NULL) return 0; |
---|
574 | fd = fopen(filename, "r"); |
---|
575 | if (fd == NULL) return 0; |
---|
576 | memset(index_key,0,MAX_HE_ENTRY_LENGTH); |
---|
577 | while (si_fscanf(fd, "%[^\t]\t%*[^\n]\n", index_key) == 1) |
---|
578 | { |
---|
579 | if ((index_key[MAX_HE_ENTRY_LENGTH-1]!='\0')) |
---|
580 | { |
---|
581 | index_key[MAX_HE_ENTRY_LENGTH-1]='\0'; |
---|
582 | Werror("index file corrupt at line >>%s<<",index_key); |
---|
583 | break; |
---|
584 | } |
---|
585 | else if (strmatch(index_key, key)) |
---|
586 | { |
---|
587 | i++; |
---|
588 | if (i == 1) |
---|
589 | { |
---|
590 | heKey2Entry(filename, index_key, hentry); |
---|
591 | } |
---|
592 | else if (i == 2) |
---|
593 | { |
---|
594 | StringAppend("?%s; ?%s;", hentry->key, index_key); |
---|
595 | } |
---|
596 | else |
---|
597 | { |
---|
598 | StringAppend(" ?%s;", index_key); |
---|
599 | } |
---|
600 | } |
---|
601 | } |
---|
602 | fclose(fd); |
---|
603 | return i; |
---|
604 | } |
---|
605 | |
---|
606 | // test for h being a string and print it |
---|
607 | static void hePrintHelpStr(const idhdl hh,const char *id,const char *pa) |
---|
608 | { |
---|
609 | if ((hh!=NULL) && (IDTYP(hh)==STRING_CMD)) |
---|
610 | { |
---|
611 | PrintS(IDSTRING(hh)); |
---|
612 | PrintLn(); |
---|
613 | } |
---|
614 | else |
---|
615 | Print("`%s` not found in package %s\n",id,pa); |
---|
616 | } |
---|
617 | // try to find the help string as a loaded procedure or library |
---|
618 | // if found, display the help and return TRUE |
---|
619 | // otherwise, return FALSE |
---|
620 | static BOOLEAN heOnlineHelp(char* s) |
---|
621 | { |
---|
622 | char *ss; |
---|
623 | idhdl h; |
---|
624 | |
---|
625 | if ((ss=strstr(s,"::"))!=NULL) |
---|
626 | { |
---|
627 | *ss='\0'; |
---|
628 | ss+=2; |
---|
629 | h=ggetid(s); |
---|
630 | if (h!=NULL) |
---|
631 | { |
---|
632 | Print("help for %s from package %s\n",ss,s); |
---|
633 | char s_help[200]; |
---|
634 | strcpy(s_help,ss); |
---|
635 | strcat(s_help,"_help"); |
---|
636 | idhdl hh=IDPACKAGE(h)->idroot->get(s_help,0); |
---|
637 | hePrintHelpStr(hh,s_help,s); |
---|
638 | return TRUE; |
---|
639 | } |
---|
640 | else Print("package %s not found\n",s); |
---|
641 | return TRUE; /* do not search the manual */ |
---|
642 | } |
---|
643 | h=IDROOT->get(s,myynest); |
---|
644 | // try help for a procedure |
---|
645 | if (h!=NULL) |
---|
646 | { |
---|
647 | if (IDTYP(h)==PROC_CMD) |
---|
648 | { |
---|
649 | char *lib=iiGetLibName(IDPROC(h)); |
---|
650 | if((lib!=NULL)&&(*lib!='\0')) |
---|
651 | { |
---|
652 | Print("// proc %s from lib %s\n",s,lib); |
---|
653 | procinfov pi=IDPROC(h); |
---|
654 | if (pi->language==LANG_SINGULAR) |
---|
655 | { |
---|
656 | s=iiGetLibProcBuffer(pi, 0); |
---|
657 | if (s!=NULL) |
---|
658 | { |
---|
659 | PrintS(s); |
---|
660 | omFree((ADDRESS)s); |
---|
661 | } |
---|
662 | return TRUE; |
---|
663 | } |
---|
664 | } |
---|
665 | } |
---|
666 | else if (IDTYP(h)==PACKAGE_CMD) |
---|
667 | { |
---|
668 | idhdl hh=IDPACKAGE(h)->idroot->get("info",0); |
---|
669 | hePrintHelpStr(hh,"info",s); |
---|
670 | return TRUE; |
---|
671 | } |
---|
672 | return FALSE; |
---|
673 | } |
---|
674 | |
---|
675 | // try help for a library |
---|
676 | int ls = strlen(s); |
---|
677 | char* str = NULL; |
---|
678 | // check that it ends with "[.,_]lib" |
---|
679 | if (strlen(s) >=4 && strcmp(&s[ls-3], "lib") == 0) |
---|
680 | { |
---|
681 | if (s[ls - 4] == '.') str = s; |
---|
682 | else |
---|
683 | { |
---|
684 | str = omStrDup(s); |
---|
685 | str[ls - 4] = '.'; |
---|
686 | } |
---|
687 | } |
---|
688 | else |
---|
689 | { |
---|
690 | return FALSE; |
---|
691 | } |
---|
692 | |
---|
693 | char libnamebuf[1024]; |
---|
694 | FILE *fp=NULL; |
---|
695 | // first, search for library of that name |
---|
696 | if ((str[1]!='\0') && |
---|
697 | ((iiLocateLib(str, libnamebuf) && (fp=feFopen(libnamebuf, "rb")) !=NULL) |
---|
698 | || |
---|
699 | ((fp=feFopen(str,"rb", libnamebuf))!=NULL))) |
---|
700 | { |
---|
701 | EXTERN_VAR FILE *yylpin; |
---|
702 | lib_style_types lib_style; // = OLD_LIBSTYLE; |
---|
703 | |
---|
704 | yylpin = fp; |
---|
705 | yylplex(str, libnamebuf, &lib_style, IDROOT, FALSE, GET_INFO); |
---|
706 | reinit_yylp(); |
---|
707 | if(lib_style == OLD_LIBSTYLE) |
---|
708 | { |
---|
709 | char buf[256]; |
---|
710 | fseek(fp, 0, SEEK_SET); |
---|
711 | Warn( "library %s has an old format. Please fix it for the next time", |
---|
712 | str); |
---|
713 | if (str != s) omFree(str); |
---|
714 | BOOLEAN found=FALSE; |
---|
715 | while (fgets( buf, sizeof(buf), fp)) |
---|
716 | { |
---|
717 | if (strncmp(buf,"//",2)==0) |
---|
718 | { |
---|
719 | if (found) return TRUE; |
---|
720 | } |
---|
721 | else if ((strncmp(buf,"proc ",5)==0)||(strncmp(buf,"LIB ",4)==0)) |
---|
722 | { |
---|
723 | if (!found) WarnS("no help part in library found"); |
---|
724 | return TRUE; |
---|
725 | } |
---|
726 | else |
---|
727 | { |
---|
728 | found=TRUE; |
---|
729 | PrintS(buf); |
---|
730 | } |
---|
731 | } |
---|
732 | } |
---|
733 | else |
---|
734 | { |
---|
735 | if (str != s) omFree(str); |
---|
736 | fclose( yylpin ); |
---|
737 | PrintS(text_buffer); |
---|
738 | omFree(text_buffer); |
---|
739 | text_buffer=NULL; |
---|
740 | } |
---|
741 | return TRUE; |
---|
742 | } |
---|
743 | |
---|
744 | if (str != s) omFree(str); |
---|
745 | return FALSE; |
---|
746 | } |
---|
747 | |
---|
748 | static long heKeyChksum(char* key) |
---|
749 | { |
---|
750 | if (key == NULL || *key == '\0') return 0; |
---|
751 | idhdl h=IDROOT->get(key,myynest); |
---|
752 | if ((h!=NULL) && (IDTYP(h)==PROC_CMD)) |
---|
753 | { |
---|
754 | procinfo *pi = IDPROC(h); |
---|
755 | if (pi != NULL) return pi->data.s.help_chksum; |
---|
756 | } |
---|
757 | return 0; |
---|
758 | } |
---|
759 | |
---|
760 | /***************************************************************** |
---|
761 | * |
---|
762 | * Implementation : Help Browsers |
---|
763 | * |
---|
764 | *****************************************************************/ |
---|
765 | |
---|
766 | STATIC_VAR BOOLEAN feHelpCalled = FALSE; |
---|
767 | |
---|
768 | static void heBrowserHelp(heEntry hentry) |
---|
769 | { |
---|
770 | // check checksums of procs |
---|
771 | int kchksum = (hentry != NULL && hentry->chksum > 0 ? |
---|
772 | heKeyChksum(hentry->key) : 0); |
---|
773 | if (kchksum && kchksum != hentry->chksum && heOnlineHelp(hentry->key)) |
---|
774 | return; |
---|
775 | |
---|
776 | if (heCurrentHelpBrowser == NULL) feHelpBrowser(NULL, 0); |
---|
777 | assume(heCurrentHelpBrowser != NULL); |
---|
778 | if (! feHelpCalled) |
---|
779 | { |
---|
780 | Warn("Displaying help in browser '%s'.", heCurrentHelpBrowser->browser); |
---|
781 | //if (strcmp(heCurrentHelpBrowser->browser, "netscape") == 0 && |
---|
782 | // feResource('h', 0) == NULL) |
---|
783 | //{ |
---|
784 | // Warn("Using URL '%s'.", feResource('u', 0)); |
---|
785 | //} |
---|
786 | WarnS("Use 'system(\"--browser\", <browser>);' to change browser,"); |
---|
787 | StringSetS("where <browser> can be: "); |
---|
788 | int i = 0; |
---|
789 | i = 0; |
---|
790 | while (heHelpBrowsers[i].browser != NULL) |
---|
791 | { |
---|
792 | if (heHelpBrowsers[i].init_proc(0,i)) |
---|
793 | StringAppend("\"%s\", ", heHelpBrowsers[i].browser); |
---|
794 | i++; |
---|
795 | } |
---|
796 | char *browsers=StringEndS(); |
---|
797 | if (browsers[strlen(browsers)-2] == ',') |
---|
798 | { |
---|
799 | browsers[strlen(browsers)-2] = '.'; |
---|
800 | browsers[strlen(browsers)-1] = '\0'; |
---|
801 | } |
---|
802 | WarnS(browsers); |
---|
803 | omFree(browsers); |
---|
804 | } |
---|
805 | |
---|
806 | heCurrentHelpBrowser->help_proc(hentry, heCurrentHelpBrowserIndex); |
---|
807 | feHelpCalled = TRUE; |
---|
808 | } |
---|
809 | |
---|
810 | #define MAX_SYSCMD_LEN MAXPATHLEN*2 |
---|
811 | static BOOLEAN heGenInit(int warn, int br) |
---|
812 | { |
---|
813 | if (heHelpBrowsers[br].required==NULL) return TRUE; |
---|
814 | const char *p=heHelpBrowsers[br].required; |
---|
815 | while (*p>'\0') |
---|
816 | { |
---|
817 | switch (*p) |
---|
818 | { |
---|
819 | case '#': break; |
---|
820 | case ' ': break; |
---|
821 | case 'i': /* singular.hlp */ |
---|
822 | case 'x': /* singular.idx */ |
---|
823 | case 'h': /* html dir */ |
---|
824 | if (feResource(*p, warn) == NULL) |
---|
825 | { |
---|
826 | if (warn) Warn("resource `%c` not found",*p); |
---|
827 | return FALSE; |
---|
828 | } |
---|
829 | break; |
---|
830 | case 'D': /* DISPLAY */ |
---|
831 | if (getenv("DISPLAY") == NULL) |
---|
832 | { |
---|
833 | if (warn) WarnS("resource `D` not found"); |
---|
834 | return FALSE; |
---|
835 | } |
---|
836 | break; |
---|
837 | case 'E': /* executable: E:xterm: */ |
---|
838 | case 'O': /* OS: O:ix86Mac-darwin/ppcMac-darwin: */ |
---|
839 | { |
---|
840 | char name[128]; |
---|
841 | char exec[128]; |
---|
842 | char op=*p; |
---|
843 | memset(name,0,128); |
---|
844 | int i=0; |
---|
845 | p++; |
---|
846 | while (((*p==':')||(*p<=' ')) && (*p!='\0')) p++; |
---|
847 | while((i<127) && (*p>' ') && (*p!=':')) |
---|
848 | { |
---|
849 | name[i]=*p; p++; i++; |
---|
850 | } |
---|
851 | if (i==0) return FALSE; |
---|
852 | |
---|
853 | if ((op=='O') && (strcmp(name,S_UNAME)!=0)) |
---|
854 | return FALSE; |
---|
855 | if ((op=='E') && (omFindExec(name,exec)==NULL)) |
---|
856 | { |
---|
857 | if (warn) Warn("executable `%s` not found",name); |
---|
858 | return FALSE; |
---|
859 | } |
---|
860 | } |
---|
861 | break; |
---|
862 | default: Warn("unknown char %c",*p); |
---|
863 | break; |
---|
864 | } |
---|
865 | p++; |
---|
866 | } |
---|
867 | return TRUE; |
---|
868 | } |
---|
869 | |
---|
870 | static void heGenHelp(heEntry hentry, int br) |
---|
871 | { |
---|
872 | char sys[MAX_SYSCMD_LEN]; |
---|
873 | const char *p=heHelpBrowsers[br].action; |
---|
874 | if (p==NULL) {PrintS("no action ?\n"); return;} |
---|
875 | memset(sys,0,MAX_SYSCMD_LEN); |
---|
876 | int i=0; |
---|
877 | while ((*p>'\0')&& (i<MAX_SYSCMD_LEN)) |
---|
878 | { |
---|
879 | if ((*p)=='%') |
---|
880 | { |
---|
881 | p++; |
---|
882 | switch (*p) |
---|
883 | { |
---|
884 | case 'f': /* local html:file */ |
---|
885 | case 'h': /* local html:URL */ |
---|
886 | case 'H': /* www html */ |
---|
887 | { |
---|
888 | char temp[256]; |
---|
889 | char *htmldir = feResource('h' /*"HtmlDir"*/); |
---|
890 | if ((*p=='h')&&(htmldir!=NULL)) |
---|
891 | strcat(sys,"file://localhost"); |
---|
892 | else if ((*p=='H')||(htmldir==NULL)) |
---|
893 | htmldir = feResource('u' /* %H -> "ManualUrl"*/); |
---|
894 | /* always defined */ |
---|
895 | if (hentry != NULL && *(hentry->url) != '\0') |
---|
896 | #ifdef HAVE_VSNPRINTF |
---|
897 | { |
---|
898 | if (*p=='H') |
---|
899 | #ifdef SINGULAR_4_2 |
---|
900 | snprintf(temp,256,"%s/%d-%d/%s", htmldir, |
---|
901 | SINGULAR_VERSION/1000, |
---|
902 | (SINGULAR_VERSION % 1000)/100, |
---|
903 | #else |
---|
904 | snprintf(temp,256,"%s/%d-%d-%d/%s", htmldir, |
---|
905 | SINGULAR_VERSION/1000, |
---|
906 | (SINGULAR_VERSION % 1000)/100, |
---|
907 | (SINGULAR_VERSION % 100)/10, |
---|
908 | #endif |
---|
909 | hentry->url); |
---|
910 | else |
---|
911 | snprintf(temp,256,"%s/%s", htmldir, hentry->url); |
---|
912 | } |
---|
913 | else |
---|
914 | { |
---|
915 | if (*p=='H') |
---|
916 | snprintf(temp,256,"%s/%d-%d-%d/index.htm", htmldir, |
---|
917 | SINGULAR_VERSION/1000, |
---|
918 | (SINGULAR_VERSION % 1000)/100, |
---|
919 | (SINGULAR_VERSION % 100)/10 |
---|
920 | ); |
---|
921 | else |
---|
922 | snprintf(temp,256,"%s/index.htm", htmldir); |
---|
923 | } |
---|
924 | #else |
---|
925 | { |
---|
926 | if (*p=='H') |
---|
927 | sprintf(temp,"%s/%d-%d-%d/%s", htmldir, |
---|
928 | SINGULAR_VERSION/1000, |
---|
929 | (SINGULAR_VERSION % 1000)/100, |
---|
930 | (SINGULAR_VERSION % 100)/10, |
---|
931 | hentry->url); |
---|
932 | else |
---|
933 | sprintf(temp,"%s/%d-%d-%d/%s", htmldir, hentry->url); |
---|
934 | } |
---|
935 | else |
---|
936 | if (*p=='H') |
---|
937 | sprintf(temp,"%s/%d-%d-%d/index.htm", htmldir, |
---|
938 | SINGULAR_VERSION/1000, |
---|
939 | (SINGULAR_VERSION % 1000)/100, |
---|
940 | (SINGULAR_VERSION % 100)/10 |
---|
941 | ); |
---|
942 | else |
---|
943 | sprintf(temp,"%s/index.htm", htmldir); |
---|
944 | } |
---|
945 | #endif |
---|
946 | strcat(sys,temp); |
---|
947 | if ((*p)=='f') |
---|
948 | { // remove #SEC |
---|
949 | char *pp=(char *)strchr(sys,'#'); |
---|
950 | if (pp!=NULL) |
---|
951 | { |
---|
952 | *pp='\0'; |
---|
953 | i=strlen(sys); |
---|
954 | memset(pp,0,MAX_SYSCMD_LEN-i); |
---|
955 | } |
---|
956 | } |
---|
957 | i=strlen(sys); |
---|
958 | break; |
---|
959 | } |
---|
960 | case 'i': /* singular.hlp */ |
---|
961 | { |
---|
962 | char *i_res=feResource('i'); |
---|
963 | if (i_res!=NULL) strcat(sys,i_res); |
---|
964 | else |
---|
965 | { |
---|
966 | WarnS("singular.hlp not found"); |
---|
967 | return; |
---|
968 | } |
---|
969 | i=strlen(sys); |
---|
970 | break; |
---|
971 | } |
---|
972 | case 'n': /* info node */ |
---|
973 | { |
---|
974 | char temp[256]; |
---|
975 | if ((hentry!=NULL) && (*(hentry->node) != '\0')) |
---|
976 | sprintf(temp,"%s",hentry->node); |
---|
977 | //else if ((hentry!=NULL) && (hentry->key!=NULL)) |
---|
978 | // sprintf(temp,"Index '%s'",hentry->key); |
---|
979 | else |
---|
980 | sprintf(temp,"Top"); |
---|
981 | strcat(sys,temp); |
---|
982 | i=strlen(sys); |
---|
983 | break; |
---|
984 | } |
---|
985 | case 'v': /* version number*/ |
---|
986 | { |
---|
987 | char temp[256]; |
---|
988 | sprintf(temp,"%d-%d-%d",SINGULAR_VERSION/1000, |
---|
989 | (SINGULAR_VERSION % 1000)/100, |
---|
990 | (SINGULAR_VERSION % 100)/10); |
---|
991 | strcat(sys,temp); |
---|
992 | i=strlen(sys); |
---|
993 | break; |
---|
994 | } |
---|
995 | default: break; |
---|
996 | } |
---|
997 | p++; |
---|
998 | } |
---|
999 | else |
---|
1000 | { |
---|
1001 | sys[i]=*p; |
---|
1002 | p++;i++; |
---|
1003 | } |
---|
1004 | } |
---|
1005 | Print("running `%s`\n",sys); |
---|
1006 | (void) system(sys); |
---|
1007 | } |
---|
1008 | |
---|
1009 | static BOOLEAN heDummyInit(int /*warn*/, int /*br*/) |
---|
1010 | { |
---|
1011 | return TRUE; |
---|
1012 | } |
---|
1013 | static void heDummyHelp(heEntry /*hentry*/, int /*br*/) |
---|
1014 | { |
---|
1015 | WerrorS("No functioning help browser available."); |
---|
1016 | } |
---|
1017 | |
---|
1018 | static BOOLEAN heEmacsInit(int /*warn*/, int /*br*/) |
---|
1019 | { |
---|
1020 | return TRUE; |
---|
1021 | } |
---|
1022 | static void heEmacsHelp(heEntry hentry, int /*br*/) |
---|
1023 | { |
---|
1024 | WarnS("Your help command could not be executed. Use"); |
---|
1025 | Warn("C-h C-s %s", |
---|
1026 | (hentry != NULL && *(hentry->node) != '\0' ? hentry->node : "Top")); |
---|
1027 | WarnS("to enter the Singular online help. For general"); |
---|
1028 | WarnS("information on Singular running under Emacs, type C-h m."); |
---|
1029 | } |
---|
1030 | static int singular_manual(char *str, BOOLEAN isIndexEntry); |
---|
1031 | static void heBuiltinHelp(heEntry hentry, int /*br*/) |
---|
1032 | { |
---|
1033 | char* node = omStrDup(hentry != NULL && *(hentry->key) != '\0' ? |
---|
1034 | hentry->key : "Top"); |
---|
1035 | singular_manual(node,(hentry != NULL) && *(hentry->url)!='\0'); |
---|
1036 | omFree(node); |
---|
1037 | } |
---|
1038 | |
---|
1039 | |
---|
1040 | /* ========================================================================== */ |
---|
1041 | // old, stupid builtin_help |
---|
1042 | // This could be implemented much more clever, but I'm too lazy to do this now |
---|
1043 | // |
---|
1044 | #define HELP_OK 0 |
---|
1045 | #define FIN_INDEX '\037' |
---|
1046 | #define HELP_NOT_OPEN 1 |
---|
1047 | #define HELP_NOT_FOUND 2 |
---|
1048 | #define BUF_LEN 256 |
---|
1049 | #define IDX_LEN 256 |
---|
1050 | |
---|
1051 | static inline char tolow(char p) |
---|
1052 | { |
---|
1053 | if (('A'<=p)&&(p<='Z')) return p | 040; |
---|
1054 | return p; |
---|
1055 | } |
---|
1056 | |
---|
1057 | /*************************************************/ |
---|
1058 | static int show(unsigned long offset, char *close) |
---|
1059 | { char buffer[BUF_LEN+1]; |
---|
1060 | int lines = 0; |
---|
1061 | FILE * help; |
---|
1062 | |
---|
1063 | if( (help = fopen(feResource('i'), "rb")) == NULL) |
---|
1064 | return HELP_NOT_OPEN; |
---|
1065 | |
---|
1066 | fseek(help, (long)(offset+1), (int)0); |
---|
1067 | while( (!feof(help)) |
---|
1068 | && (*fgets(buffer, BUF_LEN, help) != EOF) |
---|
1069 | && (buffer[0] != FIN_INDEX)) |
---|
1070 | { |
---|
1071 | printf("%s", buffer); |
---|
1072 | if(lines++==pagelength) |
---|
1073 | { |
---|
1074 | printf("\n Press <RETURN> to continue or x to exit help.\n"); |
---|
1075 | fflush(stdout); |
---|
1076 | *close = (char)getchar(); |
---|
1077 | if(*close=='x') |
---|
1078 | { |
---|
1079 | getchar(); |
---|
1080 | break; |
---|
1081 | } |
---|
1082 | lines=0; |
---|
1083 | } |
---|
1084 | } |
---|
1085 | if((*close!='x')&&(pagelength>0)) |
---|
1086 | { |
---|
1087 | printf("\nEnd of part. Press <RETURN> to continue or x to exit help.\n"); |
---|
1088 | fflush(stdout); |
---|
1089 | *close = (char)getchar(); |
---|
1090 | if(*close=='x') |
---|
1091 | getchar(); |
---|
1092 | } |
---|
1093 | fclose(help); |
---|
1094 | return HELP_OK; |
---|
1095 | } |
---|
1096 | |
---|
1097 | /*************************************************/ |
---|
1098 | static int singular_manual(char *str, BOOLEAN isIndexEntry) |
---|
1099 | { FILE *index=NULL; |
---|
1100 | unsigned long offset; |
---|
1101 | char *p,close=' '; |
---|
1102 | int done = 0; |
---|
1103 | char buffer[BUF_LEN+1], |
---|
1104 | Index[IDX_LEN+1], |
---|
1105 | String[IDX_LEN+1]; |
---|
1106 | Print("HELP >>%s>>\n",str); |
---|
1107 | |
---|
1108 | if( (index = fopen(feResource('i'), "rb")) == NULL) |
---|
1109 | { |
---|
1110 | return HELP_NOT_OPEN; |
---|
1111 | } |
---|
1112 | |
---|
1113 | if (!isIndexEntry) |
---|
1114 | { |
---|
1115 | for(p=str; *p; p++) *p = tolow(*p);/* */ |
---|
1116 | do |
---|
1117 | { |
---|
1118 | p--; |
---|
1119 | } |
---|
1120 | while ((p != str) && (*p<=' ')); |
---|
1121 | p++; |
---|
1122 | *p='\0'; |
---|
1123 | (void)sprintf(String, " %s ", str); |
---|
1124 | } |
---|
1125 | else |
---|
1126 | { |
---|
1127 | (void)sprintf(String, " %s", str); |
---|
1128 | } |
---|
1129 | |
---|
1130 | while(!feof(index) |
---|
1131 | && (fgets(buffer, BUF_LEN, index) != (char *)0) |
---|
1132 | && (buffer[0] != FIN_INDEX)); |
---|
1133 | |
---|
1134 | while(!feof(index)) |
---|
1135 | { |
---|
1136 | if (fgets(buffer, BUF_LEN, index)==NULL) break; /*fill buffer */ |
---|
1137 | if (si_sscanf(buffer, "Node:%[^\177]\177%ld\n", Index, &offset)!=2) |
---|
1138 | continue; |
---|
1139 | if (!isIndexEntry) |
---|
1140 | { |
---|
1141 | for(p=Index; *p; p++) *p = tolow(*p);/* */ |
---|
1142 | (void)strcat(Index, " "); |
---|
1143 | if( strstr(Index, String)!=NULL) |
---|
1144 | { |
---|
1145 | done++; (void)show(offset, &close); |
---|
1146 | } |
---|
1147 | } |
---|
1148 | else if( strcmp(Index, String)==0) |
---|
1149 | { |
---|
1150 | done++; (void)show(offset, &close); |
---|
1151 | break; |
---|
1152 | } |
---|
1153 | Index[0]='\0'; |
---|
1154 | if(close=='x') |
---|
1155 | break; |
---|
1156 | } |
---|
1157 | if (index != NULL) (void)fclose(index); |
---|
1158 | if(done==0) |
---|
1159 | { |
---|
1160 | Warn("`%s` not found",String); |
---|
1161 | return HELP_NOT_FOUND; |
---|
1162 | } |
---|
1163 | return HELP_OK; |
---|
1164 | } |
---|
1165 | /*************************************************/ |
---|