1 | /* |
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2 | * misc.c -- Miscellaneous routines. |
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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 | /********************************* Includes ***********************************/ |
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10 | |
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11 | #if UEMF |
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12 | #include "uemf.h" |
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13 | #else |
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14 | #include "basic/basicInternal.h" |
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15 | #endif |
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16 | |
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17 | /********************************* Defines ************************************/ |
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18 | /* |
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19 | * Sprintf buffer structure. Make the increment 64 so that |
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20 | * a balloc can use a 64 byte block. |
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21 | */ |
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22 | |
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23 | #define STR_REALLOC 0x1 /* Reallocate the buffer as required */ |
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24 | #define STR_INC 64 /* Growth increment */ |
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25 | |
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26 | typedef struct { |
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27 | char_t *s; /* Pointer to buffer */ |
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28 | int size; /* Current buffer size */ |
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29 | int max; /* Maximum buffer size */ |
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30 | int count; /* Buffer count */ |
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31 | int flags; /* Allocation flags */ |
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32 | } strbuf_t; |
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33 | |
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34 | /* |
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35 | * Sprintf formatting flags |
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36 | */ |
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37 | enum flag { |
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38 | flag_none = 0, |
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39 | flag_minus = 1, |
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40 | flag_plus = 2, |
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41 | flag_space = 4, |
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42 | flag_hash = 8, |
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43 | flag_zero = 16, |
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44 | flag_short = 32, |
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45 | flag_long = 64 |
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46 | }; |
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47 | |
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48 | /************************** Forward Declarations ******************************/ |
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49 | |
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50 | static int dsnprintf(char_t **s, int size, char_t *fmt, va_list arg, |
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51 | int msize); |
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52 | static void put_char(strbuf_t *buf, char_t c); |
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53 | static void put_string(strbuf_t *buf, char_t *s, int len, |
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54 | int width, int prec, enum flag f); |
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55 | static void put_ulong(strbuf_t *buf, unsigned long int value, int base, |
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56 | int upper, char_t *prefix, int width, int prec, enum flag f); |
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57 | |
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58 | /************************************ Code ************************************/ |
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59 | /* |
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60 | * "basename" returns a pointer to the last component of a pathname |
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61 | * LINUX and LynxOS have their own basename function |
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62 | */ |
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63 | |
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64 | #if ! LINUX && ! LYNX && ! __rtems__ |
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65 | char_t *basename(char_t *name) |
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66 | { |
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67 | char_t *cp; |
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68 | |
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69 | #if NW || WIN |
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70 | if (((cp = gstrrchr(name, '\\')) == NULL) && |
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71 | ((cp = gstrrchr(name, '/')) == NULL)) { |
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72 | return name; |
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73 | #else |
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74 | if ((cp = gstrrchr(name, '/')) == NULL) { |
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75 | return name; |
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76 | #endif |
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77 | } else if (*(cp + 1) == '\0' && cp == name) { |
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78 | return name; |
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79 | } else if (*(cp + 1) == '\0' && cp != name) { |
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80 | return T(""); |
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81 | } else { |
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82 | return ++cp; |
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83 | } |
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84 | } |
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85 | #endif /* ! LINUX & ! LYNX */ |
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86 | |
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87 | /******************************************************************************/ |
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88 | /* |
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89 | * Returns a pointer to the directory component of a pathname. bufsize is |
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90 | * the size of the buffer in BYTES! |
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91 | */ |
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92 | |
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93 | char_t *dirname(char_t *buf, char_t *name, int bufsize) |
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94 | { |
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95 | char_t *cp; |
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96 | int len; |
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97 | |
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98 | a_assert(name); |
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99 | a_assert(buf); |
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100 | a_assert(bufsize > 0); |
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101 | |
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102 | #if WIN || NW |
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103 | if ((cp = gstrrchr(name, '/')) == NULL && |
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104 | (cp = gstrrchr(name, '\\')) == NULL) |
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105 | #else |
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106 | if ((cp = gstrrchr(name, '/')) == NULL) |
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107 | #endif |
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108 | { |
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109 | gstrcpy(buf, T(".")); |
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110 | return buf; |
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111 | } |
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112 | |
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113 | if ((*(cp + 1) == '\0' && cp == name)) { |
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114 | gstrncpy(buf, T("."), TSZ(bufsize)); |
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115 | gstrcpy(buf, T(".")); |
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116 | return buf; |
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117 | } |
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118 | |
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119 | len = cp - name; |
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120 | |
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121 | if (len < bufsize) { |
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122 | gstrncpy(buf, name, len); |
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123 | buf[len] = '\0'; |
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124 | } else { |
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125 | gstrncpy(buf, name, TSZ(bufsize)); |
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126 | buf[bufsize - 1] = '\0'; |
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127 | } |
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128 | |
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129 | return buf; |
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130 | } |
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131 | |
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132 | |
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133 | /******************************************************************************/ |
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134 | /* |
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135 | * sprintf and vsprintf are bad, ok. You can easily clobber memory. Use |
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136 | * fmtAlloc and fmtValloc instead! These functions do _not_ support floating |
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137 | * point, like %e, %f, %g... |
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138 | */ |
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139 | |
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140 | int fmtAlloc(char_t **s, int n, char_t *fmt, ...) |
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141 | { |
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142 | va_list ap; |
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143 | int result; |
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144 | |
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145 | a_assert(s); |
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146 | a_assert(fmt); |
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147 | |
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148 | *s = NULL; |
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149 | va_start(ap, fmt); |
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150 | result = dsnprintf(s, n, fmt, ap, 0); |
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151 | va_end(ap); |
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152 | return result; |
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153 | } |
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154 | |
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155 | /******************************************************************************/ |
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156 | /* |
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157 | * Support a static buffer version for small buffers only! |
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158 | */ |
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159 | |
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160 | int fmtStatic(char_t *s, int n, char_t *fmt, ...) |
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161 | { |
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162 | va_list ap; |
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163 | int result; |
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164 | |
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165 | a_assert(s); |
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166 | a_assert(fmt); |
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167 | a_assert(n <= 256); |
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168 | |
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169 | if (n <= 0) { |
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170 | return -1; |
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171 | } |
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172 | va_start(ap, fmt); |
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173 | result = dsnprintf(&s, n, fmt, ap, 0); |
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174 | va_end(ap); |
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175 | return result; |
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176 | } |
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177 | |
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178 | /******************************************************************************/ |
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179 | /* |
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180 | * This function appends the formatted string to the supplied string, |
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181 | * reallocing if required. |
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182 | */ |
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183 | |
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184 | int fmtRealloc(char_t **s, int n, int msize, char_t *fmt, ...) |
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185 | { |
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186 | va_list ap; |
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187 | int result; |
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188 | |
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189 | a_assert(s); |
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190 | a_assert(fmt); |
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191 | |
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192 | if (msize == -1) { |
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193 | *s = NULL; |
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194 | } |
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195 | va_start(ap, fmt); |
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196 | result = dsnprintf(s, n, fmt, ap, msize); |
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197 | va_end(ap); |
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198 | return result; |
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199 | } |
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200 | |
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201 | /******************************************************************************/ |
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202 | /* |
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203 | * A vsprintf replacement. |
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204 | */ |
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205 | |
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206 | int fmtValloc(char_t **s, int n, char_t *fmt, va_list arg) |
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207 | { |
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208 | a_assert(s); |
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209 | a_assert(fmt); |
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210 | |
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211 | *s = NULL; |
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212 | return dsnprintf(s, n, fmt, arg, 0); |
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213 | } |
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214 | |
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215 | /******************************************************************************/ |
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216 | /* |
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217 | * Dynamic sprintf implementation. Supports dynamic buffer allocation. |
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218 | * This function can be called multiple times to grow an existing allocated |
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219 | * buffer. In this case, msize is set to the size of the previously allocated |
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220 | * buffer. The buffer will be realloced, as required. If msize is set, we |
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221 | * return the size of the allocated buffer for use with the next call. For |
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222 | * the first call, msize can be set to -1. |
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223 | */ |
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224 | |
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225 | static int dsnprintf(char_t **s, int size, char_t *fmt, va_list arg, int msize) |
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226 | { |
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227 | strbuf_t buf; |
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228 | char_t c; |
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229 | |
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230 | a_assert(s); |
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231 | a_assert(fmt); |
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232 | |
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233 | memset(&buf, 0, sizeof(buf)); |
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234 | buf.s = *s; |
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235 | |
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236 | if (*s == NULL || msize != 0) { |
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237 | buf.max = size; |
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238 | buf.flags |= STR_REALLOC; |
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239 | if (msize != 0) { |
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240 | buf.size = max(msize, 0); |
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241 | } |
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242 | if (*s != NULL && msize != 0) { |
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243 | buf.count = gstrlen(*s); |
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244 | } |
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245 | } else { |
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246 | buf.size = size; |
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247 | } |
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248 | |
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249 | while ((c = *fmt++) != '\0') { |
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250 | if (c != '%' || (c = *fmt++) == '%') { |
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251 | put_char(&buf, c); |
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252 | } else { |
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253 | enum flag f = flag_none; |
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254 | int width = 0; |
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255 | int prec = -1; |
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256 | for ( ; c != '\0'; c = *fmt++) { |
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257 | if (c == '-') { |
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258 | f |= flag_minus; |
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259 | } else if (c == '+') { |
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260 | f |= flag_plus; |
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261 | } else if (c == ' ') { |
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262 | f |= flag_space; |
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263 | } else if (c == '#') { |
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264 | f |= flag_hash; |
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265 | } else if (c == '0') { |
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266 | f |= flag_zero; |
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267 | } else { |
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268 | break; |
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269 | } |
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270 | } |
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271 | if (c == '*') { |
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272 | width = va_arg(arg, int); |
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273 | if (width < 0) { |
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274 | f |= flag_minus; |
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275 | width = -width; |
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276 | } |
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277 | c = *fmt++; |
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278 | } else { |
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279 | for ( ; gisdigit((int)c); c = *fmt++) { |
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280 | width = width * 10 + (c - '0'); |
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281 | } |
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282 | } |
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283 | if (c == '.') { |
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284 | f &= ~flag_zero; |
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285 | c = *fmt++; |
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286 | if (c == '*') { |
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287 | prec = va_arg(arg, int); |
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288 | c = *fmt++; |
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289 | } else { |
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290 | for (prec = 0; gisdigit((int)c); c = *fmt++) { |
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291 | prec = prec * 10 + (c - '0'); |
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292 | } |
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293 | } |
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294 | } |
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295 | if (c == 'h' || c == 'l') { |
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296 | f |= (c == 'h' ? flag_short : flag_long); |
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297 | c = *fmt++; |
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298 | } |
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299 | if (c == 'd' || c == 'i') { |
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300 | long int value; |
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301 | if (f & flag_short) { |
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302 | value = (short int) va_arg(arg, int); |
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303 | } else if (f & flag_long) { |
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304 | value = va_arg(arg, long int); |
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305 | } else { |
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306 | value = va_arg(arg, int); |
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307 | } |
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308 | if (value >= 0) { |
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309 | if (f & flag_plus) { |
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310 | put_ulong(&buf, value, 10, 0, T("+"), width, prec, f); |
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311 | } else if (f & flag_space) { |
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312 | put_ulong(&buf, value, 10, 0, T(" "), width, prec, f); |
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313 | } else { |
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314 | put_ulong(&buf, value, 10, 0, NULL, width, prec, f); |
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315 | } |
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316 | } else { |
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317 | put_ulong(&buf, -value, 10, 0, T("-"), width, prec, f); |
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318 | } |
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319 | } else if (c == 'o' || c == 'u' || c == 'x' || c == 'X') { |
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320 | unsigned long int value; |
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321 | if (f & flag_short) { |
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322 | value = (unsigned short int) va_arg(arg, unsigned int); |
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323 | } else if (f & flag_long) { |
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324 | value = va_arg(arg, unsigned long int); |
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325 | } else { |
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326 | value = va_arg(arg, unsigned int); |
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327 | } |
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328 | if (c == 'o') { |
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329 | if (f & flag_hash && value != 0) { |
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330 | put_ulong(&buf, value, 8, 0, T("0"), width, prec, f); |
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331 | } else { |
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332 | put_ulong(&buf, value, 8, 0, NULL, width, prec, f); |
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333 | } |
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334 | } else if (c == 'u') { |
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335 | put_ulong(&buf, value, 10, 0, NULL, width, prec, f); |
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336 | } else { |
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337 | if (f & flag_hash && value != 0) { |
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338 | if (c == 'x') { |
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339 | put_ulong(&buf, value, 16, 0, T("0x"), width, |
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340 | prec, f); |
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341 | } else { |
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342 | put_ulong(&buf, value, 16, 1, T("0X"), width, |
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343 | prec, f); |
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344 | } |
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345 | } else { |
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346 | put_ulong(&buf, value, 16, 0, NULL, width, prec, f); |
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347 | } |
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348 | } |
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349 | |
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350 | } else if (c == 'c') { |
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351 | char_t value = va_arg(arg, int); |
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352 | put_char(&buf, value); |
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353 | |
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354 | } else if (c == 's' || c == 'S') { |
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355 | char_t *value = va_arg(arg, char_t *); |
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356 | if (value == NULL) { |
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357 | put_string(&buf, T("(null)"), -1, width, prec, f); |
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358 | } else if (f & flag_hash) { |
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359 | put_string(&buf, |
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360 | value + 1, (char_t) *value, width, prec, f); |
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361 | } else { |
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362 | put_string(&buf, value, -1, width, prec, f); |
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363 | } |
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364 | } else if (c == 'p') { |
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365 | void *value = va_arg(arg, void *); |
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366 | put_ulong(&buf, |
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367 | (unsigned long int) value, 16, 0, T("0x"), width, prec, f); |
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368 | } else if (c == 'n') { |
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369 | if (f & flag_short) { |
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370 | short int *value = va_arg(arg, short int *); |
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371 | *value = buf.count; |
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372 | } else if (f & flag_long) { |
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373 | long int *value = va_arg(arg, long int *); |
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374 | *value = buf.count; |
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375 | } else { |
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376 | int *value = va_arg(arg, int *); |
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377 | *value = buf.count; |
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378 | } |
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379 | } else { |
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380 | put_char(&buf, c); |
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381 | } |
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382 | } |
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383 | } |
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384 | if (buf.s == NULL) { |
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385 | put_char(&buf, '\0'); |
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386 | } |
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387 | |
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388 | /* |
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389 | * If the user requested a dynamic buffer (*s == NULL), ensure it is returned. |
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390 | */ |
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391 | if (*s == NULL || msize != 0) { |
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392 | *s = buf.s; |
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393 | } |
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394 | |
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395 | if (*s != NULL && size > 0) { |
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396 | if (buf.count < size) { |
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397 | (*s)[buf.count] = '\0'; |
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398 | } else { |
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399 | (*s)[buf.size - 1] = '\0'; |
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400 | } |
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401 | } |
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402 | |
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403 | if (msize != 0) { |
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404 | return buf.size; |
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405 | } |
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406 | return buf.count; |
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407 | } |
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408 | |
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409 | /******************************************************************************/ |
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410 | /* |
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411 | * Add a character to a string buffer |
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412 | */ |
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413 | |
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414 | static void put_char(strbuf_t *buf, char_t c) |
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415 | { |
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416 | if (buf->count >= (buf->size - 1)) { |
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417 | if (! (buf->flags & STR_REALLOC)) { |
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418 | return; |
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419 | } |
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420 | buf->size += STR_INC; |
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421 | if (buf->size > buf->max && buf->size > STR_INC) { |
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422 | /* |
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423 | * Caller should increase the size of the calling buffer |
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424 | */ |
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425 | buf->size -= STR_INC; |
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426 | return; |
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427 | } |
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428 | if (buf->s == NULL) { |
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429 | buf->s = balloc(B_L, buf->size * sizeof(char_t)); |
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430 | } else { |
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431 | buf->s = brealloc(B_L, buf->s, buf->size * sizeof(char_t)); |
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432 | } |
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433 | } |
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434 | buf->s[buf->count] = c; |
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435 | if (c != '\0') { |
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436 | ++buf->count; |
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437 | } |
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438 | } |
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439 | |
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440 | /******************************************************************************/ |
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441 | /* |
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442 | * Add a string to a string buffer |
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443 | */ |
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444 | |
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445 | static void put_string(strbuf_t *buf, char_t *s, int len, int width, |
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446 | int prec, enum flag f) |
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447 | { |
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448 | int i; |
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449 | |
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450 | if (len < 0) { |
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451 | len = strnlen(s, prec >= 0 ? prec : ULONG_MAX); |
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452 | } else if (prec >= 0 && prec < len) { |
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453 | len = prec; |
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454 | } |
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455 | if (width > len && !(f & flag_minus)) { |
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456 | for (i = len; i < width; ++i) { |
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457 | put_char(buf, ' '); |
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458 | } |
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459 | } |
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460 | for (i = 0; i < len; ++i) { |
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461 | put_char(buf, s[i]); |
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462 | } |
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463 | if (width > len && f & flag_minus) { |
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464 | for (i = len; i < width; ++i) { |
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465 | put_char(buf, ' '); |
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466 | } |
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467 | } |
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468 | } |
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469 | |
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470 | /******************************************************************************/ |
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471 | /* |
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472 | * Add a long to a string buffer |
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473 | */ |
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474 | |
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475 | static void put_ulong(strbuf_t *buf, unsigned long int value, int base, |
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476 | int upper, char_t *prefix, int width, int prec, enum flag f) |
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477 | { |
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478 | unsigned long x, x2; |
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479 | int len, zeros, i; |
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480 | |
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481 | for (len = 1, x = 1; x < ULONG_MAX / base; ++len, x = x2) { |
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482 | x2 = x * base; |
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483 | if (x2 > value) { |
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484 | break; |
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485 | } |
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486 | } |
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487 | zeros = (prec > len) ? prec - len : 0; |
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488 | width -= zeros + len; |
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489 | if (prefix != NULL) { |
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490 | width -= strnlen(prefix, ULONG_MAX); |
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491 | } |
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492 | if (!(f & flag_minus)) { |
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493 | if (f & flag_zero) { |
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494 | for (i = 0; i < width; ++i) { |
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495 | put_char(buf, '0'); |
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496 | } |
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497 | } else { |
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498 | for (i = 0; i < width; ++i) { |
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499 | put_char(buf, ' '); |
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500 | } |
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501 | } |
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502 | } |
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503 | if (prefix != NULL) { |
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504 | put_string(buf, prefix, -1, 0, -1, flag_none); |
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505 | } |
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506 | for (i = 0; i < zeros; ++i) { |
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507 | put_char(buf, '0'); |
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508 | } |
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509 | for ( ; x > 0; x /= base) { |
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510 | int digit = (value / x) % base; |
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511 | put_char(buf, (char) ((digit < 10 ? '0' : (upper ? 'A' : 'a') - 10) + |
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512 | digit)); |
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513 | } |
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514 | if (f & flag_minus) { |
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515 | for (i = 0; i < width; ++i) { |
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516 | put_char(buf, ' '); |
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517 | } |
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518 | } |
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519 | } |
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520 | |
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521 | /******************************************************************************/ |
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522 | /* |
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523 | * Convert an ansi string to a unicode string. On an error, we return the |
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524 | * original ansi string which is better than returning NULL. nBytes is the |
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525 | * size of the destination buffer (ubuf) in _bytes_. |
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526 | */ |
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527 | |
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528 | char_t *ascToUni(char_t *ubuf, char *str, int nBytes) |
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529 | { |
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530 | #if UNICODE |
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531 | if (MultiByteToWideChar(CP_ACP, 0, str, nBytes / sizeof(char_t), ubuf, |
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532 | nBytes / sizeof(char_t)) < 0) { |
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533 | return (char_t*) str; |
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534 | } |
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535 | #else |
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536 | memcpy(ubuf, str, nBytes); |
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537 | #endif |
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538 | return ubuf; |
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539 | } |
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540 | |
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541 | /******************************************************************************/ |
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542 | /* |
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543 | * Convert a unicode string to an ansi string. On an error, return the |
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544 | * original unicode string which is better than returning NULL. |
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545 | * N.B. nBytes is the number of _bytes_ in the destination buffer, buf. |
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546 | */ |
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547 | |
---|
548 | char *uniToAsc(char *buf, char_t *ustr, int nBytes) |
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549 | { |
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550 | #if UNICODE |
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551 | if (WideCharToMultiByte(CP_ACP, 0, ustr, nBytes, buf, nBytes, NULL, |
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552 | NULL) < 0) { |
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553 | return (char*) ustr; |
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554 | } |
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555 | #else |
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556 | memcpy(buf, ustr, nBytes); |
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557 | #endif |
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558 | return (char*) buf; |
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559 | } |
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560 | |
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561 | /******************************************************************************/ |
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562 | /* |
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563 | * allocate (balloc) a buffer and do ascii to unicode conversion into it. |
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564 | * cp points to the ascii buffer. alen is the length of the buffer to be |
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565 | * converted not including a terminating NULL. Return a pointer to the |
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566 | * unicode buffer which must be bfree'd later. Return NULL on failure to |
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567 | * get buffer. The buffer returned is NULL terminated. |
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568 | */ |
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569 | |
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570 | char_t *ballocAscToUni(char *cp, int alen) |
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571 | { |
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572 | char_t *unip; |
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573 | int ulen; |
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574 | |
---|
575 | ulen = (alen + 1) * sizeof(char_t); |
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576 | if ((unip = balloc(B_L, ulen)) == NULL) { |
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577 | return NULL; |
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578 | } |
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579 | ascToUni(unip, cp, ulen); |
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580 | unip[alen] = 0; |
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581 | return unip; |
---|
582 | } |
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583 | |
---|
584 | /******************************************************************************/ |
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585 | /* |
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586 | * allocate (balloc) a buffer and do unicode to ascii conversion into it. |
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587 | * unip points to the unicoded string. ulen is the number of characters |
---|
588 | * in the unicode string not including a teminating null. Return a pointer |
---|
589 | * to the ascii buffer which must be bfree'd later. Return NULL on failure |
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590 | * to get buffer. The buffer returned is NULL terminated. |
---|
591 | */ |
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592 | |
---|
593 | char *ballocUniToAsc(char_t *unip, int ulen) |
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594 | { |
---|
595 | char * cp; |
---|
596 | |
---|
597 | if ((cp = balloc(B_L, ulen+1)) == NULL) { |
---|
598 | return NULL; |
---|
599 | } |
---|
600 | uniToAsc(cp, unip, ulen); |
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601 | cp[ulen] = '\0'; |
---|
602 | return cp; |
---|
603 | } |
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604 | |
---|
605 | /******************************************************************************/ |
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606 | /* |
---|
607 | * convert a hex string to an integer. The end of the string or a non-hex |
---|
608 | * character will indicate the end of the hex specification. |
---|
609 | */ |
---|
610 | |
---|
611 | unsigned int hextoi(char_t *hexstring) |
---|
612 | { |
---|
613 | register char_t *h; |
---|
614 | register unsigned int c, v; |
---|
615 | |
---|
616 | v = 0; |
---|
617 | h = hexstring; |
---|
618 | if (*h == '0' && (*(h+1) == 'x' || *(h+1) == 'X')) { |
---|
619 | h += 2; |
---|
620 | } |
---|
621 | while ((c = (unsigned int)*h++) != 0) { |
---|
622 | if (c >= '0' && c <= '9') { |
---|
623 | c -= '0'; |
---|
624 | } else if (c >= 'a' && c <= 'f') { |
---|
625 | c = (c - 'a') + 10; |
---|
626 | } else if (c >= 'A' && c <= 'F') { |
---|
627 | c = (c - 'A') + 10; |
---|
628 | } else { |
---|
629 | break; |
---|
630 | } |
---|
631 | v = (v * 0x10) + c; |
---|
632 | } |
---|
633 | return v; |
---|
634 | } |
---|
635 | |
---|
636 | /******************************************************************************/ |
---|
637 | /* |
---|
638 | * convert a string to an integer. If the string starts with "0x" or "0X" |
---|
639 | * a hexidecimal conversion is done. |
---|
640 | */ |
---|
641 | |
---|
642 | unsigned int gstrtoi(char_t *s) |
---|
643 | { |
---|
644 | if (*s == '0' && (*(s+1) == 'x' || *(s+1) == 'X')) { |
---|
645 | s += 2; |
---|
646 | return hextoi(s); |
---|
647 | } |
---|
648 | return gatoi(s); |
---|
649 | } |
---|
650 | |
---|
651 | /******************************************************************************/ |
---|
652 | |
---|