Source:NetHack 3.3.0/alloc.c

Below is the full text to alloc.c from the source code of NetHack 3.3.0. To link to a particular line, write [[NetHack 3.3.0/alloc.c#line123 ]], for example.

Warning! This is the source code from an old release. For the latest release, see Source code

1.   /*	SCCS Id: @(#)alloc.c	3.3	95/10/04	*/ 2.   /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */ 3.    /* NetHack may be freely redistributed. See license for details. */ 4.     5.    /* to get the malloc prototype from system.h */ 6.   #define ALLOC_C		/* comment line for pre-compiled headers */ 7.   /* since this file is also used in auxiliary programs, don't include all the 8.    * function declarations for all of nethack 9.    */  10.   #define EXTERN_H	/* comment line for pre-compiled headers */ 11.  #include "config.h"  12. 13.  #if defined(MONITOR_HEAP) || defined(WIZARD) 14.  char *FDECL(fmt_ptr, (const genericptr,char *)); 15.  #endif 16.   17.   #ifdef MONITOR_HEAP 18.  #undef alloc 19.  #undef free 20.  extern void FDECL(free,(genericptr_t)); 21.  static void NDECL(heapmon_init); 22.   23.   static FILE *heaplog = 0; 24.  static boolean tried_heaplog = FALSE; 25.  #endif 26.   27.   long *FDECL(alloc,(unsigned int)); 28.  extern void VDECL(panic, (const char *,...)) PRINTF_F(1,2); 29.   30.    31.   long * 32.  alloc(lth) 33.  register unsigned int lth; 34.  {  35.   #ifdef LINT 36.  /*  37.    * a ridiculous definition, suppressing 38.   *	"possible pointer alignment problem" for (long *) malloc 39.   * from lint 40.   */  41.   	long dummy = ftell(stderr); 42.   43.   	if(lth) dummy = 0;	/* make sure arg is used */ 44.  	return(&dummy); 45.  #else 46.  	register genericptr_t ptr; 47.   48.   	ptr = malloc(lth); 49.  #ifndef MONITOR_HEAP 50.  	if (!ptr) panic("Memory allocation failure; cannot get %u bytes", lth); 51.  #endif 52.  	return((long *) ptr); 53.  #endif 54.  }  55.    56.    57.   #if defined(MONITOR_HEAP) || defined(WIZARD) 58.   59.   # ifdef MICRO 60.  /* we actually want to know which systems have an ANSI run-time library 61.   * to know which support the new %p format for printing pointers. 62.   * due to the presence of things like gcc, NHSTDC is not a good test. 63.   * so we assume microcomputers have all converted to ANSI and bigger 64.   * computers which may have older libraries give reasonable results with 65.   * the cast. 66.   */  67.   #  define MONITOR_PTR_FMT 68.  # endif 69.   70.   # ifdef MONITOR_PTR_FMT 71.  #  define PTR_FMT "%p" 72.  #  define PTR_TYP genericptr_t 73.  # else 74.  #  define PTR_FMT "%06lx" 75.  #  define PTR_TYP unsigned long 76.  # endif 77.   78.   /* format a pointer for display purposes; caller supplies the result buffer */ 79.  char * 80.  fmt_ptr(ptr, buf) 81.  const genericptr ptr; 82.  char *buf; 83.  {  84.   	Sprintf(buf, PTR_FMT, (PTR_TYP)ptr); 85.  	return buf; 86.  }  87.    88.   #endif 89.   90.   #ifdef MONITOR_HEAP 91.   92.   /* If ${NH_HEAPLOG} is defined and we can create a file by that name, 93.     then we'll log the allocation and release information to that file. */ 94.   static void 95.  heapmon_init 96.  {  97.   	char *logname = getenv("NH_HEAPLOG"); 98.   99.   	if (logname && *logname) 100. 		heaplog = fopen(logname, "w"); 101. 	tried_heaplog = TRUE; 102. }  103.   104.  long * 105. nhalloc(lth, file, line) 106. unsigned int lth; 107. const char *file; 108. int line; 109. {  110.  	long *ptr = alloc(lth); 111. 	char ptr_address[20]; 112.  113.  	if (!tried_heaplog) heapmon_init; 114. 	if (heaplog) 115. 		(void) fprintf(heaplog, "+%5u %s %4d %s\n", lth,  116.  				fmt_ptr((genericptr_t)ptr, ptr_address),  117.  				line, file); 118. 	/* potential panic in alloc was deferred til here */ 119. 	if (!ptr) panic("Cannot get %u bytes, line %d of %s",  120.  			lth, line, file); 121.  122.  	return ptr; 123. }  124.   125.  void 126. nhfree(ptr, file, line) 127. genericptr_t ptr; 128. const char *file; 129. int line; 130. {  131.  	char ptr_address[20]; 132.  133.  	if (!tried_heaplog) heapmon_init; 134. 	if (heaplog) 135. 		(void) fprintf(heaplog, "-      %s %4d %s\n",  136.  				fmt_ptr((genericptr_t)ptr, ptr_address),  137.  				line, file); 138.  139.  	free(ptr); 140. }  141.   142.  #endif /* MONITOR_HEAP */ 143.  144.  /*alloc.c*/