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/* File: z-util.c */
/* Purpose: Low level utilities -BEN- */
#include "z-util.h"
/*
* Global variables for temporary use
*/
char char_tmp = 0;
byte byte_tmp = 0;
sint sint_tmp = 0;
uint uint_tmp = 0;
long long_tmp = 0;
huge huge_tmp = 0;
errr errr_tmp = 0;
/*
* Global pointers for temporary use
*/
cptr cptr_tmp = NULL;
vptr vptr_tmp = NULL;
/*
* Constant bool meaning true
*/
bool bool_true = 1;
/*
* Constant bool meaning false
*/
bool bool_false = 0;
/*
* Global NULL cptr
*/
cptr cptr_null = NULL;
/*
* Global NULL vptr
*/
vptr vptr_null = NULL;
/*
* Global SELF vptr
*/
vptr vptr_self = (vptr)(&vptr_self);
/*
* Convenient storage of the program name
*/
cptr argv0 = NULL;
/*
* A routine that does nothing
*/
void func_nothing(void)
{
/* Do nothing */
}
/*
* A routine that always returns "success"
*/
errr func_success(void)
{
return (0);
}
/*
* A routine that always returns a simple "problem code"
*/
errr func_problem(void)
{
return (1);
}
/*
* A routine that always returns a simple "failure code"
*/
errr func_failure(void)
{
return ( -1);
}
/*
* A routine that always returns "true"
*/
bool func_true(void)
{
return (1);
}
/*
* A routine that always returns "false"
*/
bool func_false(void)
{
return (0);
}
/*
* Determine if string "t" is equal to string "t"
*/
bool streq(cptr a, cptr b)
{
return (!strcmp(a, b));
}
/*
* Determine if string "t" is a suffix of string "s"
*/
bool suffix(cptr s, cptr t)
{
int tlen = strlen(t);
int slen = strlen(s);
/* Check for incompatible lengths */
if (tlen > slen) return (FALSE);
/* Compare "t" to the end of "s" */
return (!strcmp(s + slen - tlen, t));
}
/*
* Redefinable "plog" action
*/
void (*plog_aux)(cptr) = NULL;
/*
* Print (or log) a "warning" message (ala "perror()")
* Note the use of the (optional) "plog_aux" hook.
*/
void plog(cptr str)
{
/* Use the "alternative" function if possible */
if (plog_aux) (*plog_aux)(str);
/* Just do a labeled fprintf to stderr */
else (void)(fprintf(stderr, "%s: %s\n", argv0 ? argv0 : "???", str));
}
/*
* Redefinable "quit" action
*/
void (*quit_aux)(cptr) = NULL;
/*
* Exit (ala "exit()"). If 'str' is NULL, do "exit(0)".
* If 'str' begins with "+" or "-", do "exit(atoi(str))".
* Otherwise, plog() 'str' and exit with an error code of -1.
* But always use 'quit_aux', if set, before anything else.
*/
void quit(cptr str)
{
/* Attempt to use the aux function */
if (quit_aux) (*quit_aux)(str);
/* Success */
if (!str) (void)(exit(0));
/* Extract a "special error code" */
if ((str[0] == '-') || (str[0] == '+')) (void)(exit(atoi(str)));
/* Send the string to plog() */
plog(str);
/* Failure */
(void)(exit( -1));
}
/*
* Redefinable "core" action
*/
void (*core_aux)(cptr) = NULL;
/*
* Dump a core file, after printing a warning message
* As with "quit()", try to use the "core_aux()" hook first.
*/
void core(cptr str)
{
char *crash = NULL;
/* Use the aux function */
if (core_aux) (*core_aux)(str);
/* Dump the warning string */
if (str) plog(str);
/* Attempt to Crash */
(*crash) = (*crash);
/* Be sure we exited */
quit("core() failed");
}
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