1 | /* |
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2 | * Copyright (c) 1992-1998 Michael A. Cooper. |
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3 | * This software may be freely used and distributed provided it is not |
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4 | * sold for profit or used in part or in whole for commercial gain |
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5 | * without prior written agreement, and the author is credited |
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6 | * appropriately. |
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7 | */ |
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8 | |
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9 | #ifndef lint |
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10 | static char *RCSid = "$Revision: 1.1.1.3 $"; |
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11 | #endif |
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12 | |
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13 | /* |
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14 | * String utility functions |
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15 | */ |
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16 | #include "defs.h" |
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17 | #include "strutil.h" |
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18 | |
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19 | /* |
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20 | * Is What in List? |
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21 | */ |
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22 | int IsSep(What, List) |
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23 | int What; |
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24 | char *List; |
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25 | { |
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26 | register char *cp; |
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27 | |
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28 | for (cp = List; cp < &List[strlen(List)]; ++cp) |
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29 | if (What == *cp) |
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30 | return(1); |
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31 | |
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32 | return(0); |
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33 | } |
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34 | |
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35 | /* |
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36 | * Find the first seperator from List in String and |
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37 | * return a pointer. |
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38 | */ |
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39 | char *FindSep(String, List) |
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40 | char *String; |
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41 | char *List; |
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42 | { |
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43 | register char *cp; |
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44 | |
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45 | for (cp = String; cp < &String[strlen(String)]; ++cp) |
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46 | if (IsSep(*cp, List)) |
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47 | return(cp); |
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48 | |
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49 | return((char *)NULL); |
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50 | } |
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51 | |
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52 | /* |
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53 | * Is What a quote character? If so, return the ending quote char |
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54 | * which is the next char in QuoteChars. QuoteChars may contain |
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55 | * multiple pairs of quote characters. e.g ""<>''`' |
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56 | */ |
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57 | int IsQuote(What, QuoteChars) |
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58 | int What; |
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59 | char *QuoteChars; |
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60 | { |
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61 | int QuotePair; |
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62 | static int NumQuotes; |
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63 | static char *LastQuoteChars; |
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64 | |
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65 | if (!QuoteChars) |
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66 | return(0); |
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67 | |
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68 | if (LastQuoteChars != QuoteChars || !NumQuotes) |
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69 | NumQuotes = strlen(QuoteChars); |
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70 | LastQuoteChars = QuoteChars; |
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71 | |
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72 | for (QuotePair = 0; QuotePair < NumQuotes; QuotePair += 2) { |
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73 | if (What == QuoteChars[QuotePair]) |
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74 | return(QuoteChars[QuotePair+1]); |
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75 | } |
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76 | |
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77 | return(0); |
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78 | } |
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79 | |
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80 | /* |
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81 | * Parse a string into an argument vector. |
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82 | * List is the string to be parsed. |
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83 | * SepChars is the list of seperator characters which will be used to |
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84 | * break apart List. |
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85 | * ArgvPtr is where the argument results will be stored. |
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86 | * QuoteChars is the list of characters which indicate single arguments. |
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87 | * This is a list of pairs. The first char indicated begining |
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88 | * of quoted argument, the next char indicates end. e.g ""<>''`' |
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89 | */ |
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90 | extern int |
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91 | StrToArgv(List, SepChars, ArgvPtr, QuoteChars, Flags) |
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92 | char *List; |
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93 | char *SepChars; |
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94 | char ***ArgvPtr; |
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95 | char *QuoteChars; |
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96 | int Flags; |
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97 | { |
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98 | char **Argv = NULL; |
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99 | char *String; |
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100 | char *Ptr; |
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101 | char *Start; |
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102 | char *Next; |
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103 | char *End; |
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104 | int EndQuote; |
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105 | register char *cp; |
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106 | register int Count; |
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107 | register int i; |
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108 | |
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109 | if (!List) |
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110 | return(0); |
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111 | |
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112 | String = List; |
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113 | for (Count = 0, Ptr = String; Ptr && *Ptr; ++Ptr) { |
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114 | if (EndQuote = IsQuote(*Ptr, QuoteChars)) |
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115 | while (*(++Ptr) != EndQuote); |
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116 | if (IsSep(*Ptr, SepChars)) |
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117 | ++Count; |
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118 | if (FLAGS_ON(Flags, STRTO_SKIPRP)) { |
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119 | /* Skip over rest of SepChars for now */ |
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120 | while (Ptr && *Ptr && IsSep(*Ptr, SepChars)) |
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121 | ++Ptr; |
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122 | } |
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123 | } |
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124 | |
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125 | /* |
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126 | * Watch for ending seperator |
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127 | */ |
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128 | if (IsSep(*(Ptr-1), SepChars)) |
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129 | --Count; |
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130 | |
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131 | /* |
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132 | * There's only one argument with no seperator? |
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133 | */ |
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134 | if (Count == 0 && String && *String) |
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135 | ++Count; |
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136 | else if (!Count) |
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137 | return(0); |
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138 | else |
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139 | Count++; |
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140 | |
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141 | Argv = (char **) xcalloc(Count+1, sizeof(char *)); |
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142 | |
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143 | /* |
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144 | * We don't use strtok() because it doesn't like back-to-back |
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145 | * seperators. e.g. "foo||bar" will skip the NULL argument. |
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146 | * strtok() also doesn't do QuoteChars like we do. |
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147 | */ |
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148 | for (i = 0, Start = NULL, Ptr = String; i < Count; ++i) { |
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149 | Start = Ptr; |
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150 | if (!isspace(*SepChars)) |
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151 | /* Skip leading white space */ |
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152 | for ( ; Start && *Start && isspace(*Start); ++Start); |
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153 | if (EndQuote = IsQuote(*Start, QuoteChars)) |
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154 | ++Start; |
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155 | /* Find end of word */ |
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156 | for (End = Start; End && *End; ++End) { |
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157 | if (EndQuote) { |
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158 | if (*End == EndQuote) |
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159 | break; |
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160 | } else if (IsSep(*End, SepChars)) |
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161 | break; |
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162 | } |
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163 | /* Mark next field */ |
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164 | Next = End; |
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165 | if (Next) |
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166 | ++Next; |
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167 | /* Remove trailing white space */ |
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168 | if (!isspace(*SepChars) && isspace(*(End-1))) { |
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169 | while (--End > Start && *End && isspace(*End)); |
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170 | ++End; |
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171 | } |
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172 | if (End > Start) { |
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173 | Argv[i] = (char *) xmalloc( (End - Start) + 1 ); |
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174 | (void) strncpy(Argv[i], Start, End - Start); |
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175 | Argv[i][End - Start] = CNULL; |
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176 | } |
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177 | Ptr = Next; |
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178 | if (!Next) |
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179 | break; |
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180 | if (FLAGS_ON(Flags, STRTO_SKIPRP)) { |
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181 | /* Skip over rest of SepChars for now */ |
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182 | while (Ptr && *Ptr && IsSep(*Ptr, SepChars)) |
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183 | ++Ptr; |
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184 | } |
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185 | } |
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186 | |
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187 | *ArgvPtr = Argv; |
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188 | |
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189 | return(Count); |
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190 | } |
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191 | |
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192 | /* |
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193 | * Destroy an argument vector such as was created by StrToArgv(). |
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194 | */ |
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195 | extern void |
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196 | DestroyArgv(ArgvPtr, Argc) |
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197 | char ***ArgvPtr; |
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198 | int Argc; |
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199 | { |
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200 | register int i; |
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201 | char **Argv; |
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202 | |
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203 | if (Argc <= 0 || !ArgvPtr) |
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204 | return; |
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205 | |
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206 | Argv = *ArgvPtr; |
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207 | for (i = 0; i < Argc; ++i) |
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208 | if (Argv[i]) |
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209 | (void) free(Argv[i]); |
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210 | |
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211 | (void) free(*ArgvPtr); |
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212 | *ArgvPtr = NULL; |
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213 | } |
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214 | |
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215 | /* |
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216 | * Make String all lower case. |
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217 | */ |
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218 | extern void strtolower(String) |
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219 | char *String; |
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220 | { |
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221 | register char *cp; |
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222 | |
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223 | for (cp = String; cp && *cp; ++cp) |
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224 | if (isupper(*cp)) |
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225 | *cp = tolower(*cp); |
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226 | } |
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227 | |
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228 | /* |
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229 | * Return an all lower case version of String |
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230 | */ |
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231 | extern char *strlower(String) |
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232 | char *String; |
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233 | { |
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234 | static char *Buffer = NULL; |
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235 | register char *cp; |
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236 | |
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237 | if (Buffer) |
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238 | free(Buffer); |
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239 | |
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240 | Buffer = strdup(String); |
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241 | |
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242 | for (cp = Buffer; cp && *cp; ++cp) |
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243 | if (isupper(*cp)) |
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244 | *cp = tolower(*cp); |
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245 | |
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246 | return(Buffer); |
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247 | } |
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248 | |
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249 | /* |
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250 | * Return an all upper case version of String |
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251 | */ |
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252 | extern char *strupper(String) |
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253 | char *String; |
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254 | { |
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255 | static char *Buffer = NULL; |
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256 | register char *cp; |
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257 | |
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258 | if (Buffer) |
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259 | free(Buffer); |
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260 | |
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261 | Buffer = strdup(String); |
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262 | |
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263 | for (cp = Buffer; cp && *cp; ++cp) |
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264 | if (islower(*cp)) |
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265 | *cp = toupper(*cp); |
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266 | |
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267 | return(Buffer); |
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268 | } |
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