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| 22 | <a href="./Home">MLton 20180207</a>\r |
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| 25 | <div id="header">\r |
| 26 | <h1>ForeignFunctionInterfaceTypes</h1>\r |
| 27 | </div>\r |
| 28 | <div id="content">\r |
| 29 | <div id="preamble">\r |
| 30 | <div class="sectionbody">\r |
| 31 | <div class="paragraph"><p>MLton’s <a href="ForeignFunctionInterface">ForeignFunctionInterface</a> only allows values of certain SML\r |
| 32 | types to be passed between SML and C. The following types are\r |
| 33 | allowed: <span class="monospaced">bool</span>, <span class="monospaced">char</span>, <span class="monospaced">int</span>, <span class="monospaced">real</span>, <span class="monospaced">word</span>. All of the different\r |
| 34 | sizes of (fixed-sized) integers, reals, and words are supported as\r |
| 35 | well: <span class="monospaced">Int8.int</span>, <span class="monospaced">Int16.int</span>, <span class="monospaced">Int32.int</span>, <span class="monospaced">Int64.int</span>,\r |
| 36 | <span class="monospaced">Real32.real</span>, <span class="monospaced">Real64.real</span>, <span class="monospaced">Word8.word</span>, <span class="monospaced">Word16.word</span>,\r |
| 37 | <span class="monospaced">Word32.word</span>, <span class="monospaced">Word64.word</span>. There is a special type,\r |
| 38 | <span class="monospaced">MLton.Pointer.t</span>, for passing C pointers — see <a href="MLtonPointer">MLtonPointer</a> for\r |
| 39 | details.</p></div>\r |
| 40 | <div class="paragraph"><p>Arrays, refs, and vectors of the above types are also allowed.\r |
| 41 | Because in MLton monomorphic arrays and vectors are exactly the same\r |
| 42 | as their polymorphic counterpart, these are also allowed. Hence,\r |
| 43 | <span class="monospaced">string</span>, <span class="monospaced">char vector</span>, and <span class="monospaced">CharVector.vector</span> are also allowed.\r |
| 44 | Strings are not null terminated, unless you manually do so from the\r |
| 45 | SML side.</p></div>\r |
| 46 | <div class="paragraph"><p>Unfortunately, passing tuples or datatypes is not allowed because that\r |
| 47 | would interfere with representation optimizations.</p></div>\r |
| 48 | <div class="paragraph"><p>The C header file that <span class="monospaced">-export-header</span> generates includes\r |
| 49 | <span class="monospaced">typedef</span>s for the C types corresponding to the SML types. Here is\r |
| 50 | the mapping between SML types and C types.</p></div>\r |
| 51 | <table class="tableblock frame-all grid-all"\r |
| 52 | style="\r |
| 53 | width:100%;\r |
| 54 | ">\r |
| 55 | <col style="width:25%;">\r |
| 56 | <col style="width:25%;">\r |
| 57 | <col style="width:25%;">\r |
| 58 | <col style="width:25%;">\r |
| 59 | <thead>\r |
| 60 | <tr>\r |
| 61 | <th class="tableblock halign-left valign-top" > SML type </th>\r |
| 62 | <th class="tableblock halign-left valign-top" > C typedef </th>\r |
| 63 | <th class="tableblock halign-left valign-top" > C type </th>\r |
| 64 | <th class="tableblock halign-left valign-top" > Note</th>\r |
| 65 | </tr>\r |
| 66 | </thead>\r |
| 67 | <tbody>\r |
| 68 | <tr>\r |
| 69 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">array</span></p></td>\r |
| 70 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Pointer</span></p></td>\r |
| 71 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned char *</span></p></td>\r |
| 72 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 73 | </tr>\r |
| 74 | <tr>\r |
| 75 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">bool</span></p></td>\r |
| 76 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Bool</span></p></td>\r |
| 77 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">int32_t</span></p></td>\r |
| 78 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 79 | </tr>\r |
| 80 | <tr>\r |
| 81 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">char</span></p></td>\r |
| 82 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Char8</span></p></td>\r |
| 83 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">uint8_t</span></p></td>\r |
| 84 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 85 | </tr>\r |
| 86 | <tr>\r |
| 87 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Int8.int</span></p></td>\r |
| 88 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Int8</span></p></td>\r |
| 89 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">int8_t</span></p></td>\r |
| 90 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 91 | </tr>\r |
| 92 | <tr>\r |
| 93 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Int16.int</span></p></td>\r |
| 94 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Int16</span></p></td>\r |
| 95 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">int16_t</span></p></td>\r |
| 96 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 97 | </tr>\r |
| 98 | <tr>\r |
| 99 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Int32.int</span></p></td>\r |
| 100 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Int32</span></p></td>\r |
| 101 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">int32_t</span></p></td>\r |
| 102 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 103 | </tr>\r |
| 104 | <tr>\r |
| 105 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Int64.int</span></p></td>\r |
| 106 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Int64</span></p></td>\r |
| 107 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">int64_t</span></p></td>\r |
| 108 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 109 | </tr>\r |
| 110 | <tr>\r |
| 111 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">int</span></p></td>\r |
| 112 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Int32</span></p></td>\r |
| 113 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">int32_t</span></p></td>\r |
| 114 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><a href="ForeignFunctionInterfaceTypes#Default">(default)</a></p></td>\r |
| 115 | </tr>\r |
| 116 | <tr>\r |
| 117 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">MLton.Pointer.t</span></p></td>\r |
| 118 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Pointer</span></p></td>\r |
| 119 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned char *</span></p></td>\r |
| 120 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 121 | </tr>\r |
| 122 | <tr>\r |
| 123 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Real32.real</span></p></td>\r |
| 124 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Real32</span></p></td>\r |
| 125 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">float</span></p></td>\r |
| 126 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 127 | </tr>\r |
| 128 | <tr>\r |
| 129 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Real64.real</span></p></td>\r |
| 130 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Real64</span></p></td>\r |
| 131 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">double</span></p></td>\r |
| 132 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 133 | </tr>\r |
| 134 | <tr>\r |
| 135 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">real</span></p></td>\r |
| 136 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Real64</span></p></td>\r |
| 137 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">double</span></p></td>\r |
| 138 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><a href="ForeignFunctionInterfaceTypes#Default">(default)</a></p></td>\r |
| 139 | </tr>\r |
| 140 | <tr>\r |
| 141 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">ref</span></p></td>\r |
| 142 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Pointer</span></p></td>\r |
| 143 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned char *</span></p></td>\r |
| 144 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 145 | </tr>\r |
| 146 | <tr>\r |
| 147 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">string</span></p></td>\r |
| 148 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Pointer</span></p></td>\r |
| 149 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned char *</span></p></td>\r |
| 150 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><a href="ForeignFunctionInterfaceTypes#ReadOnly">(read only)</a></p></td>\r |
| 151 | </tr>\r |
| 152 | <tr>\r |
| 153 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">vector</span></p></td>\r |
| 154 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Pointer</span></p></td>\r |
| 155 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned char *</span></p></td>\r |
| 156 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><a href="ForeignFunctionInterfaceTypes#ReadOnly">(read only)</a></p></td>\r |
| 157 | </tr>\r |
| 158 | <tr>\r |
| 159 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Word8.word</span></p></td>\r |
| 160 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Word8</span></p></td>\r |
| 161 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">uint8_t</span></p></td>\r |
| 162 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 163 | </tr>\r |
| 164 | <tr>\r |
| 165 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Word16.word</span></p></td>\r |
| 166 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Word16</span></p></td>\r |
| 167 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">uint16_t</span></p></td>\r |
| 168 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 169 | </tr>\r |
| 170 | <tr>\r |
| 171 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Word32.word</span></p></td>\r |
| 172 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Word32</span></p></td>\r |
| 173 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">uint32_t</span></p></td>\r |
| 174 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 175 | </tr>\r |
| 176 | <tr>\r |
| 177 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Word64.word</span></p></td>\r |
| 178 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Word64</span></p></td>\r |
| 179 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">uint64_t</span></p></td>\r |
| 180 | <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>\r |
| 181 | </tr>\r |
| 182 | <tr>\r |
| 183 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">word</span></p></td>\r |
| 184 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">Word32</span></p></td>\r |
| 185 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">uint32_t</span></p></td>\r |
| 186 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><a href="ForeignFunctionInterfaceTypes#Default">(default)</a></p></td>\r |
| 187 | </tr>\r |
| 188 | </tbody>\r |
| 189 | </table>\r |
| 190 | <div class="paragraph"><p><a id="Default"></a>Note (default): The default <span class="monospaced">int</span>, <span class="monospaced">real</span>, and\r |
| 191 | <span class="monospaced">word</span> types may be set by the <span class="monospaced">-default-type <em>type</em></span>\r |
| 192 | <a href="CompileTimeOptions"> compiler option</a>. The given C typedef and C\r |
| 193 | types correspond to the default behavior.</p></div>\r |
| 194 | <div class="paragraph"><p><a id="ReadOnly"></a>Note (read only): Because MLton assumes that\r |
| 195 | vectors and strings are read-only (and will perform optimizations\r |
| 196 | that, for instance, cause them to share space), you must not modify\r |
| 197 | the data pointed to by the <span class="monospaced">unsigned char *</span> in C code.</p></div>\r |
| 198 | <div class="paragraph"><p>Although the C type of an array, ref, or vector is always <span class="monospaced">Pointer</span>,\r |
| 199 | in reality, the object has the natural C representation. Your C code\r |
| 200 | should cast to the appropriate C type if you want to keep the C\r |
| 201 | compiler from complaining.</p></div>\r |
| 202 | <div class="paragraph"><p>When calling an <a href="CallingFromSMLToC"> imported C function from SML</a>\r |
| 203 | that returns an array, ref, or vector result or when calling an\r |
| 204 | <a href="CallingFromCToSML"> exported SML function from C</a> that takes an\r |
| 205 | array, ref, or string argument, then the object must be an ML object\r |
| 206 | allocated on the ML heap. (Although an array, ref, or vector object\r |
| 207 | has the natural C representation, the object also has an additional\r |
| 208 | header used by the SML runtime system.)</p></div>\r |
| 209 | <div class="paragraph"><p>In addition, there is an <a href="MLBasis">MLBasis</a> file, <span class="monospaced">$(SML_LIB)/basis/c-types.mlb</span>,\r |
| 210 | which provides structure aliases for various C types:</p></div>\r |
| 211 | <table class="tableblock frame-all grid-all"\r |
| 212 | style="\r |
| 213 | width:100%;\r |
| 214 | ">\r |
| 215 | <col style="width:33%;">\r |
| 216 | <col style="width:33%;">\r |
| 217 | <col style="width:33%;">\r |
| 218 | <tbody>\r |
| 219 | <tr>\r |
| 220 | <td class="tableblock halign-left valign-top" ><p class="tableblock">C type</p></td>\r |
| 221 | <td class="tableblock halign-left valign-top" ><p class="tableblock">Structure</p></td>\r |
| 222 | <td class="tableblock halign-left valign-top" ><p class="tableblock">Signature</p></td>\r |
| 223 | </tr>\r |
| 224 | <tr>\r |
| 225 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">char</span></p></td>\r |
| 226 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Char</span></p></td>\r |
| 227 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 228 | </tr>\r |
| 229 | <tr>\r |
| 230 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">signed char</span></p></td>\r |
| 231 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_SChar</span></p></td>\r |
| 232 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 233 | </tr>\r |
| 234 | <tr>\r |
| 235 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned char</span></p></td>\r |
| 236 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_UChar</span></p></td>\r |
| 237 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">WORD</span></p></td>\r |
| 238 | </tr>\r |
| 239 | <tr>\r |
| 240 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">short</span></p></td>\r |
| 241 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Short</span></p></td>\r |
| 242 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 243 | </tr>\r |
| 244 | <tr>\r |
| 245 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">signed short</span></p></td>\r |
| 246 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_SShort</span></p></td>\r |
| 247 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 248 | </tr>\r |
| 249 | <tr>\r |
| 250 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned short</span></p></td>\r |
| 251 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_UShort</span></p></td>\r |
| 252 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">WORD</span></p></td>\r |
| 253 | </tr>\r |
| 254 | <tr>\r |
| 255 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">int</span></p></td>\r |
| 256 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Int</span></p></td>\r |
| 257 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 258 | </tr>\r |
| 259 | <tr>\r |
| 260 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">signed int</span></p></td>\r |
| 261 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_SInt</span></p></td>\r |
| 262 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 263 | </tr>\r |
| 264 | <tr>\r |
| 265 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned int</span></p></td>\r |
| 266 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_UInt</span></p></td>\r |
| 267 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">WORD</span></p></td>\r |
| 268 | </tr>\r |
| 269 | <tr>\r |
| 270 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">long</span></p></td>\r |
| 271 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Long</span></p></td>\r |
| 272 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 273 | </tr>\r |
| 274 | <tr>\r |
| 275 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">signed long</span></p></td>\r |
| 276 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_SLong</span></p></td>\r |
| 277 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 278 | </tr>\r |
| 279 | <tr>\r |
| 280 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned long</span></p></td>\r |
| 281 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_ULong</span></p></td>\r |
| 282 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">WORD</span></p></td>\r |
| 283 | </tr>\r |
| 284 | <tr>\r |
| 285 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">long long</span></p></td>\r |
| 286 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_LongLong</span></p></td>\r |
| 287 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 288 | </tr>\r |
| 289 | <tr>\r |
| 290 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">signed long long</span></p></td>\r |
| 291 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_SLongLong</span></p></td>\r |
| 292 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 293 | </tr>\r |
| 294 | <tr>\r |
| 295 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">unsigned long long</span></p></td>\r |
| 296 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_ULongLong</span></p></td>\r |
| 297 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">WORD</span></p></td>\r |
| 298 | </tr>\r |
| 299 | <tr>\r |
| 300 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">float</span></p></td>\r |
| 301 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Float</span></p></td>\r |
| 302 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">REAL</span></p></td>\r |
| 303 | </tr>\r |
| 304 | <tr>\r |
| 305 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">double</span></p></td>\r |
| 306 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Double</span></p></td>\r |
| 307 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">REAL</span></p></td>\r |
| 308 | </tr>\r |
| 309 | <tr>\r |
| 310 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">size_t</span></p></td>\r |
| 311 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Size</span></p></td>\r |
| 312 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">WORD</span></p></td>\r |
| 313 | </tr>\r |
| 314 | <tr>\r |
| 315 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">ptrdiff_t</span></p></td>\r |
| 316 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Ptrdiff</span></p></td>\r |
| 317 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 318 | </tr>\r |
| 319 | <tr>\r |
| 320 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">intmax_t</span></p></td>\r |
| 321 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Intmax</span></p></td>\r |
| 322 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 323 | </tr>\r |
| 324 | <tr>\r |
| 325 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">uintmax_t</span></p></td>\r |
| 326 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_UIntmax</span></p></td>\r |
| 327 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">WORD</span></p></td>\r |
| 328 | </tr>\r |
| 329 | <tr>\r |
| 330 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">intptr_t</span></p></td>\r |
| 331 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Intptr</span></p></td>\r |
| 332 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">INTEGER</span></p></td>\r |
| 333 | </tr>\r |
| 334 | <tr>\r |
| 335 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">uintptr_t</span></p></td>\r |
| 336 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_UIntptr</span></p></td>\r |
| 337 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">WORD</span></p></td>\r |
| 338 | </tr>\r |
| 339 | <tr>\r |
| 340 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">void *</span></p></td>\r |
| 341 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">C_Pointer</span></p></td>\r |
| 342 | <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">WORD</span></p></td>\r |
| 343 | </tr>\r |
| 344 | </tbody>\r |
| 345 | </table>\r |
| 346 | <div class="paragraph"><p>These aliases depend on the configuration of the C compiler for the\r |
| 347 | target architecture, and are independent of the configuration of MLton\r |
| 348 | (including the <span class="monospaced">-default-type <em>type</em></span>\r |
| 349 | <a href="CompileTimeOptions"> compiler option</a>).</p></div>\r |
| 350 | </div>\r |
| 351 | </div>\r |
| 352 | </div>\r |
| 353 | <div id="footnotes"><hr></div>\r |
| 354 | <div id="footer">\r |
| 355 | <div id="footer-text">\r |
| 356 | </div>\r |
| 357 | <div id="footer-badges">\r |
| 358 | </div>\r |
| 359 | </div>\r |
| 360 | </body>\r |
| 361 | </html>\r |