wxPython/src/libpy.c

   1 /***********************************************************************
   2  * $Header$
   3  * swig_lib/python/python.cfg
   4  *
   5  * Contains variable linking and pointer type-checking code.
   6  ************************************************************************/
   7
   8 #include <string.h>
   9 #include <stdlib.h>
  10
  11 #include "Python.h"
  12
  13 #ifdef __cplusplus
  14 extern "C" {
  15 #endif
  16
  17 /* Definitions for Windows/Unix exporting */
  18 #if defined(_WIN32) || defined(__WIN32__)
  19 #   if defined(_MSC_VER)
  20 #       define SWIGEXPORT(a) __declspec(dllexport) a
  21 #   else
  22 #       if defined(__BORLANDC__)
  23 #           define SWIGEXPORT(a) a _export
  24 #       else
  25 #           define SWIGEXPORT(a) a
  26 #       endif
  27 #   endif
  28 #else
  29 #   define SWIGEXPORT(a) a
  30 #endif
  31
  32 #ifdef SWIG_GLOBAL
  33 #define SWIGSTATICRUNTIME(a) SWIGEXPORT(a)
  34 #else
  35 #define SWIGSTATICRUNTIME(a) static a
  36 #endif
  37
  38 typedef struct {
  39   char  *name;
  40   PyObject *(*get_attr)(void);
  41   int (*set_attr)(PyObject *);
  42 } swig_globalvar;
  43
  44 typedef struct swig_varlinkobject {
  45   PyObject_HEAD
  46   swig_globalvar **vars;
  47   int      nvars;
  48   int      maxvars;
  49 } swig_varlinkobject;
  50
  51 /* ----------------------------------------------------------------------
  52    swig_varlink_repr()
  53
  54    Function for python repr method
  55    ---------------------------------------------------------------------- */
  56
  57 static PyObject *
  58 swig_varlink_repr(swig_varlinkobject *v)
  59 {
  60   v = v;
  61   return PyString_FromString("<Global variables>");
  62 }
  63
  64 /* ---------------------------------------------------------------------
  65    swig_varlink_print()
  66
  67    Print out all of the global variable names
  68    --------------------------------------------------------------------- */
  69
  70 static int
  71 swig_varlink_print(swig_varlinkobject *v, FILE *fp, int flags)
  72 {
  73
  74   int i = 0;
  75   flags = flags;
  76   fprintf(fp,"Global variables { ");
  77   while (v->vars[i]) {
  78     fprintf(fp,"%s", v->vars[i]->name);
  79     i++;
  80     if (v->vars[i]) fprintf(fp,", ");
  81   }
  82   fprintf(fp," }\n");
  83   return 0;
  84 }
  85
  86 /* --------------------------------------------------------------------
  87    swig_varlink_getattr
  88
  89    This function gets the value of a variable and returns it as a
  90    PyObject.   In our case, we'll be looking at the datatype and
  91    converting into a number or string
  92    -------------------------------------------------------------------- */
  93
  94 static PyObject *
  95 swig_varlink_getattr(swig_varlinkobject *v, char *n)
  96 {
  97   int i = 0;
  98   char temp[128];
  99
 100   while (v->vars[i]) {
 101     if (strcmp(v->vars[i]->name,n) == 0) {
 102       return (*v->vars[i]->get_attr)();
 103     }
 104     i++;
 105   }
 106   sprintf(temp,"C global variable %s not found.", n);
 107   PyErr_SetString(PyExc_NameError,temp);
 108   return NULL;
 109 }
 110
 111 /* -------------------------------------------------------------------
 112    swig_varlink_setattr()
 113
 114    This function sets the value of a variable.
 115    ------------------------------------------------------------------- */
 116
 117 static int
 118 swig_varlink_setattr(swig_varlinkobject *v, char *n, PyObject *p)
 119 {
 120   char temp[128];
 121   int i = 0;
 122   while (v->vars[i]) {
 123     if (strcmp(v->vars[i]->name,n) == 0) {
 124       return (*v->vars[i]->set_attr)(p);
 125     }
 126     i++;
 127   }
 128   sprintf(temp,"C global variable %s not found.", n);
 129   PyErr_SetString(PyExc_NameError,temp);
 130   return 1;
 131 }
 132
 133 statichere PyTypeObject varlinktype = {
 134 /*  PyObject_HEAD_INIT(&PyType_Type)  Note : This doesn't work on some machines */
 135   PyObject_HEAD_INIT(0)
 136   0,
 137   "varlink",                          /* Type name    */
 138   sizeof(swig_varlinkobject),         /* Basic size   */
 139   0,                                  /* Itemsize     */
 140   0,                                  /* Deallocator  */
 141   (printfunc) swig_varlink_print,     /* Print        */
 142   (getattrfunc) swig_varlink_getattr, /* get attr     */
 143   (setattrfunc) swig_varlink_setattr, /* Set attr     */
 144   0,                                  /* tp_compare   */
 145   (reprfunc) swig_varlink_repr,       /* tp_repr      */
 146   0,                                  /* tp_as_number */
 147   0,                                  /* tp_as_mapping*/
 148   0,                                  /* tp_hash      */
 149 };
 150
 151 /* Create a variable linking object for use later */
 152
 153 SWIGSTATICRUNTIME(PyObject *)
 154 SWIG_newvarlink(void)
 155 {
 156   swig_varlinkobject *result = 0;
 157   result = PyMem_NEW(swig_varlinkobject,1);
 158   varlinktype.ob_type = &PyType_Type;    /* Patch varlinktype into a PyType */
 159   result->ob_type = &varlinktype;
 160   /*  _Py_NewReference(result);  Does not seem to be necessary */
 161   result->nvars = 0;
 162   result->maxvars = 64;
 163   result->vars = (swig_globalvar **) malloc(64*sizeof(swig_globalvar *));
 164   result->vars[0] = 0;
 165   result->ob_refcnt = 0;
 166   Py_XINCREF((PyObject *) result);
 167   return ((PyObject*) result);
 168 }
 169
 170 SWIGSTATICRUNTIME(void)
 171 SWIG_addvarlink(PyObject *p, char *name,
 172            PyObject *(*get_attr)(void), int (*set_attr)(PyObject *p))
 173 {
 174   swig_varlinkobject *v;
 175   v= (swig_varlinkobject *) p;
 176
 177   if (v->nvars >= v->maxvars -1) {
 178     v->maxvars = 2*v->maxvars;
 179     v->vars = (swig_globalvar **) realloc(v->vars,v->maxvars*sizeof(swig_globalvar *));
 180     if (v->vars == NULL) {
 181       fprintf(stderr,"SWIG : Fatal error in initializing Python module.\n");
 182       exit(1);
 183     }
 184   }
 185   v->vars[v->nvars] = (swig_globalvar *) malloc(sizeof(swig_globalvar));
 186   v->vars[v->nvars]->name = (char *) malloc(strlen(name)+1);
 187   strcpy(v->vars[v->nvars]->name,name);
 188   v->vars[v->nvars]->get_attr = get_attr;
 189   v->vars[v->nvars]->set_attr = set_attr;
 190   v->nvars++;
 191   v->vars[v->nvars] = 0;
 192 }
 193
 194 /* -----------------------------------------------------------------------------
 195  * Pointer type-checking
 196  * ----------------------------------------------------------------------------- */
 197
 198 /* SWIG pointer structure */
 199 typedef struct SwigPtrType {
 200   char               *name;               /* Datatype name                  */
 201   int                 len;                /* Length (used for optimization) */
 202   void               *(*cast)(void *);    /* Pointer casting function       */
 203   struct SwigPtrType *next;               /* Linked list pointer            */
 204 } SwigPtrType;
 205
 206 /* Pointer cache structure */
 207 typedef struct {
 208   int                 stat;               /* Status (valid) bit             */
 209   SwigPtrType        *tp;                 /* Pointer to type structure      */
 210   char                name[256];          /* Given datatype name            */
 211   char                mapped[256];        /* Equivalent name                */
 212 } SwigCacheType;
 213
 214 static int SwigPtrMax  = 64;           /* Max entries that can be currently held */
 215 static int SwigPtrN    = 0;            /* Current number of entries              */
 216 static int SwigPtrSort = 0;            /* Status flag indicating sort            */
 217 static int SwigStart[256];             /* Starting positions of types            */
 218 static SwigPtrType *SwigPtrTable = 0;  /* Table containing pointer equivalences  */
 219
 220 /* Cached values */
 221 #define SWIG_CACHESIZE  8
 222 #define SWIG_CACHEMASK  0x7
 223 static SwigCacheType SwigCache[SWIG_CACHESIZE];
 224 static int SwigCacheIndex = 0;
 225 static int SwigLastCache = 0;
 226
 227 /* Sort comparison function */
 228 static int swigsort(const void *data1, const void *data2) {
 229         SwigPtrType *d1 = (SwigPtrType *) data1;
 230         SwigPtrType *d2 = (SwigPtrType *) data2;
 231         return strcmp(d1->name,d2->name);
 232 }
 233
 234 /* Register a new datatype with the type-checker */
 235 SWIGSTATICRUNTIME(void)
 236 SWIG_RegisterMapping(char *origtype, char *newtype, void *(*cast)(void *)) {
 237   int i;
 238   SwigPtrType *t = 0,*t1;
 239
 240   /* Allocate the pointer table if necessary */
 241   if (!SwigPtrTable) {
 242     SwigPtrTable = (SwigPtrType *) malloc(SwigPtrMax*sizeof(SwigPtrType));
 243   }
 244
 245   /* Grow the table */
 246   if (SwigPtrN >= SwigPtrMax) {
 247     SwigPtrMax = 2*SwigPtrMax;
 248     SwigPtrTable = (SwigPtrType *) realloc((char *) SwigPtrTable,SwigPtrMax*sizeof(SwigPtrType));
 249   }
 250   for (i = 0; i < SwigPtrN; i++) {
 251     if (strcmp(SwigPtrTable[i].name,origtype) == 0) {
 252       t = &SwigPtrTable[i];
 253       break;
 254     }
 255   }
 256   if (!t) {
 257     t = &SwigPtrTable[SwigPtrN++];
 258     t->name = origtype;
 259     t->len = strlen(t->name);
 260     t->cast = 0;
 261     t->next = 0;
 262   }
 263
 264   /* Check for existing entries */
 265   while (t->next) {
 266     if ((strcmp(t->name,newtype) == 0)) {
 267       if (cast) t->cast = cast;
 268       return;
 269     }
 270     t = t->next;
 271   }
 272   t1 = (SwigPtrType *) malloc(sizeof(SwigPtrType));
 273   t1->name = newtype;
 274   t1->len = strlen(t1->name);
 275   t1->cast = cast;
 276   t1->next = 0;
 277   t->next = t1;
 278   SwigPtrSort = 0;
 279 }
 280
 281 /* Make a pointer value string */
 282 SWIGSTATICRUNTIME(void)
 283 SWIG_MakePtr(char *c, const void *ptr, char *type) {
 284   static char hex[17] = "0123456789abcdef";
 285   unsigned long p, s;
 286   char result[24], *r;
 287   r = result;
 288   p = (unsigned long) ptr;
 289   if (p > 0) {
 290     while (p > 0) {
 291       s = p & 0xf;
 292       *(r++) = hex[s];
 293       p = p >> 4;
 294     }
 295     *r = '_';
 296     while (r >= result)
 297       *(c++) = *(r--);
 298     strcpy (c, type);
 299   } else {
 300     strcpy (c, "NULL");
 301   }
 302 }
 303
 304 /* Function for getting a pointer value */
 305 SWIGSTATICRUNTIME(char *)
 306 SWIG_GetPtr(char *c, void **ptr, char *t)
 307 {
 308   unsigned long p;
 309   char temp_type[256], *name;
 310   int  i, len, start, end;
 311   SwigPtrType *sp,*tp;
 312   SwigCacheType *cache;
 313   register int d;
 314
 315   p = 0;
 316   /* Pointer values must start with leading underscore */
 317   if (*c != '_') {
 318     *ptr = (void *) 0;
 319     if (strcmp(c,"NULL") == 0) return (char *) 0;
 320     else return c;
 321   }
 322   c++;
 323   /* Extract hex value from pointer */
 324   while ((d = *c) != 0) {
 325     if ((d >= '0') && (d <= '9'))
 326       p = (p << 4) + (d - '0');
 327     else if ((d >= 'a') && (d <= 'f'))
 328       p = (p << 4) + (d - ('a'-10));
 329     else
 330       break;
 331     c++;
 332   }
 333   *ptr = (void *) p;
 334   if ((!t) || (strcmp(t,c)==0)) return (char *) 0;
 335
 336   if (!SwigPtrSort) {
 337     qsort((void *) SwigPtrTable, SwigPtrN, sizeof(SwigPtrType), swigsort);
 338     for (i = 0; i < 256; i++) SwigStart[i] = SwigPtrN;
 339     for (i = SwigPtrN-1; i >= 0; i--) SwigStart[(int) (SwigPtrTable[i].name[1])] = i;
 340     for (i = 255; i >= 1; i--) {
 341       if (SwigStart[i-1] > SwigStart[i])
 342         SwigStart[i-1] = SwigStart[i];
 343     }
 344     SwigPtrSort = 1;
 345     for (i = 0; i < SWIG_CACHESIZE; i++) SwigCache[i].stat = 0;
 346   }
 347   /* First check cache for matches.  Uses last cache value as starting point */
 348   cache = &SwigCache[SwigLastCache];
 349   for (i = 0; i < SWIG_CACHESIZE; i++) {
 350     if (cache->stat && (strcmp(t,cache->name) == 0) && (strcmp(c,cache->mapped) == 0)) {
 351       cache->stat++;
 352       if (cache->tp->cast) *ptr = (*(cache->tp->cast))(*ptr);
 353       return (char *) 0;
 354     }
 355     SwigLastCache = (SwigLastCache+1) & SWIG_CACHEMASK;
 356     if (!SwigLastCache) cache = SwigCache;
 357     else cache++;
 358   }
 359   /* Type mismatch.  Look through type-mapping table */
 360   start = SwigStart[(int) t[1]];
 361   end = SwigStart[(int) t[1]+1];
 362   sp = &SwigPtrTable[start];
 363
 364   /* Try to find a match */
 365   while (start < end) {               /* was "<="     --robin */
 366     if (strncmp(t,sp->name,sp->len) == 0) {
 367       name = sp->name;
 368       len = sp->len;
 369       tp = sp->next;
 370       /* Try to find entry for our given datatype */
 371       while(tp) {
 372         if (tp->len >= 255) {
 373           return c;
 374         }
 375         strcpy(temp_type,tp->name);
 376         strncat(temp_type,t+len,255-tp->len);
 377         if (strcmp(c,temp_type) == 0) {
 378           strcpy(SwigCache[SwigCacheIndex].mapped,c);
 379           strcpy(SwigCache[SwigCacheIndex].name,t);
 380           SwigCache[SwigCacheIndex].stat = 1;
 381           SwigCache[SwigCacheIndex].tp = tp;
 382           SwigCacheIndex = SwigCacheIndex & SWIG_CACHEMASK;
 383           /* Get pointer value */
 384           *ptr = (void *) p;
 385           if (tp->cast) *ptr = (*(tp->cast))(*ptr);
 386           return (char *) 0;
 387         }
 388         tp = tp->next;
 389       }
 390     }
 391     sp++;
 392     start++;
 393   }
 394   return c;
 395 }
 396
 397 /* New object-based GetPointer function. This uses the Python abstract
 398  * object interface to automatically dereference the 'this' attribute
 399  * of shadow objects. */
 400
 401 SWIGSTATICRUNTIME(char *)
 402 SWIG_GetPtrObj(PyObject *obj, void **ptr, char *type) {
 403   PyObject *sobj = obj;
 404   char     *str;
 405   if (!PyString_Check(obj)) {
 406       if (!PyInstance_Check(obj) || !(sobj = PyObject_GetAttrString(obj,"this")))
 407           return "";
 408       // PyObject_GetAttrString increases sobj refcout !
 409       Py_DECREF(sobj);
 410   }
 411   str = PyString_AsString(sobj);
 412   if (str == NULL)
 413       return "";
 414   return SWIG_GetPtr(str,ptr,type);
 415 }
 416
 417
 418 #ifdef __cplusplus
 419 }
 420 #endif
 421
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