TB9.2 Example Applications: examples/PIPS/antiword/src/xmalloc.c Source File

00001 /*
-00002  * xmalloc.c
-00003  * Copyright (C) 1998-2005 A.J. van Os
-00004  *
-00005  * Description:
-00006  * Extended malloc and friends
-00007  */
-00008 
-00009 #include <stdlib.h>
-00010 #include <string.h>
-00011 #include "antiword.h"
-00012 
-00013 static char *szMessage =
-00014         "Memory allocation failed, unable to continue";
-00015 #if defined(__dos) && !defined(__DJGPP__)
-00016 static char *szDosMessage =
-00017         "DOS can't allocate this kind of memory, unable to continue";
-00018 #endif /* __dos && !__DJGPP__ */
-00019 
-00020 
-00021 /*
-00022  * xmalloc - Allocates dynamic memory
-00023  *
-00024  * See malloc(3), but unlike malloc(3) xmalloc does not return in case
-00025  * of error.
-00026  */
-00027 void *
-00028 xmalloc(size_t tSize)
-00029 {
-00030         void    *pvTmp;
-00031 
-00032         TRACE_MSG("xmalloc");
-00033 
-00034         if (tSize == 0) {
-00035                 tSize = 1;
-00036         }
-00037         pvTmp = malloc(tSize);
-00038         if (pvTmp == NULL) {
-00039                 DBG_MSG("xmalloc returned NULL");
-00040                 DBG_DEC(tSize);
-00041                 werr(1, szMessage);
-00042         }
-00043         return pvTmp;
-00044 } /* end of xmalloc */
-00045 
-00046 /*
-00047  * xcalloc - Allocates and zeros dynamic memory
-00048  *
-00049  * See calloc(3), but unlike calloc(3) xcalloc does not return in case of error
-00050  */
-00051 void *
-00052 xcalloc(size_t tNmemb, size_t tSize)
-00053 {
-00054         void    *pvTmp;
-00055 
-00056         TRACE_MSG("xcalloc");
-00057 
-00058 #if defined(__dos) && !defined(__DJGPP__)
-00059         if ((ULONG)tNmemb * (ULONG)tSize > 0xffffUL) {
-00060                 DBG_DEC((ULONG)tNmemb * (ULONG)tSize);
-00061                 werr(1, szDosMessage);
-00062         }
-00063 #endif /* __dos && !__DJGPP__ */
-00064 
-00065         if (tNmemb == 0 || tSize == 0) {
-00066                 tNmemb = 1;
-00067                 tSize = 1;
-00068         }
-00069         pvTmp = calloc(tNmemb, tSize);
-00070         if (pvTmp == NULL) {
-00071                 DBG_MSG("xcalloc returned NULL");
-00072                 werr(1, szMessage);
-00073         }
-00074         return pvTmp;
-00075 } /* end of xcalloc */
-00076 
-00077 /*
-00078  * xrealloc - Changes the size of a memory object
-00079  *
-00080  * See realloc(3), but unlike realloc(3) xrealloc does not return in case
-00081  * of error.
-00082  */
-00083 void *
-00084 xrealloc(void *pvArg, size_t tSize)
-00085 {
-00086         void    *pvTmp;
-00087 
-00088         TRACE_MSG("xrealloc");
-00089 
-00090         pvTmp = realloc(pvArg, tSize);
-00091         if (pvTmp == NULL) {
-00092                 DBG_MSG("realloc returned NULL");
-00093                 werr(1, szMessage);
-00094         }
-00095         return pvTmp;
-00096 } /* end of xrealloc */
-00097 
-00098 /*
-00099  * xstrdup - Duplicate a string
-00100  *
-00101  * See strdup(3), but unlike strdup(3) xstrdup does not return in case
-00102  * of error.
-00103  *
-00104  * NOTE:
-00105  * Does not use strdup(3), because some systems don't have it.
-00106  */
-00107 char *
-00108 xstrdup(const char *szArg)
-00109 {
-00110         char    *szTmp;
-00111 
-00112         TRACE_MSG("xstrdup");
-00113 
-00114         szTmp = xmalloc(strlen(szArg) + 1);
-00115         strcpy(szTmp, szArg);
-00116         return szTmp;
-00117 } /* end of xstrdup */
-00118 
-00119 /*
-00120  * xfree - Deallocates dynamic memory
-00121  *
-00122  * See free(3).
-00123  *
-00124  * returns NULL;
-00125  * This makes p=xfree(p) possible, free memory and overwrite the pointer to it.
-00126  */
-00127 void *
-00128 xfree(void *pvArg)
-00129 {
-00130         TRACE_MSG("xfree");
-00131 
-00132         if (pvArg != NULL) {
-00133                 free(pvArg);
-00134         }
-00135         return NULL;
-00136 } /* end of xfree */
-