diff options
Diffstat (limited to 'contrib/bc/dc/misc.c')
| -rw-r--r-- | contrib/bc/dc/misc.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/contrib/bc/dc/misc.c b/contrib/bc/dc/misc.c new file mode 100644 index 0000000..8c360ca --- /dev/null +++ b/contrib/bc/dc/misc.c @@ -0,0 +1,177 @@ +/* + * misc. functions for the "dc" Desk Calculator language. + * + * Copyright (C) 1994, 1997 Free Software Foundation, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, you can either send email to this + * program's author (see below) or write to: The Free Software Foundation, + * Inc.; 675 Mass Ave. Cambridge, MA 02139, USA. + */ + +/* This module contains miscelaneous functions that have no + * special knowledge of any private data structures. + * They could all be moved to their own separate modules, but + * are agglomerated here for convenience. + */ + +#include "config.h" + +#include <stdio.h> +#ifdef HAVE_STDLIB_H +# include <stdlib.h> +#endif +#ifdef HAVE_STRING_H +# include <string.h> +#else +# ifdef HAVE_STRINGS_H +# include <strings.h> +# endif +#endif +#include <ctype.h> +#ifndef isgraph +# ifndef HAVE_ISGRAPH +# define isgraph isprint +# endif +#endif +#include <getopt.h> +#include "dc.h" +#include "dc-proto.h" + +#include "version.h" + +#ifndef EXIT_FAILURE /* C89 <stdlib.h> */ +# define EXIT_FAILURE 1 +#endif + + +/* print an "out of memory" diagnostic and exit program */ +void +dc_memfail DC_DECLVOID() +{ + fprintf(stderr, "%s: out of memory\n", progname); + exit(EXIT_FAILURE); +} + +/* malloc or die */ +void * +dc_malloc DC_DECLARG((len)) + size_t len DC_DECLEND +{ + void *result = malloc(len); + + if (!result) + dc_memfail(); + return result; +} + + +/* print the id in a human-understandable form + * fp is the output stream to place the output on + * id is the name of the register (or command) to be printed + * suffix is a modifier (such as "stack") to be printed + */ +void +dc_show_id DC_DECLARG((fp, id, suffix)) + FILE *fp DC_DECLSEP + int id DC_DECLSEP + const char *suffix DC_DECLEND +{ + if (isgraph(id)) + fprintf(fp, "'%c' (%#o)%s", id, id, suffix); + else + fprintf(fp, "%#o%s", id, suffix); +} + + +/* report that corrupt data has been detected; + * use the msg and regid (if nonnegative) to give information + * about where the garbage was found, + * + * will abort() so that a debugger might be used to help find + * the bug + */ +/* If this routine is called, then there is a bug in the code; + * i.e. it is _not_ a data or user error + */ +void +dc_garbage DC_DECLARG((msg, regid)) + const char *msg DC_DECLSEP + int regid DC_DECLEND +{ + if (regid < 0) { + fprintf(stderr, "%s: garbage %s\n", progname, msg); + } else { + fprintf(stderr, "%s:%s register ", progname, msg); + dc_show_id(stderr, regid, " is garbage\n"); + } + abort(); +} + + +/* call system() with the passed string; + * if the string contains a newline, terminate the string + * there before calling system. + * Return a pointer to the first unused character in the string + * (i.e. past the '\n' if there was one, to the '\0' otherwise). + */ +const char * +dc_system DC_DECLARG((s)) + const char *s DC_DECLEND +{ + const char *p; + char *tmpstr; + size_t len; + + p = strchr(s, '\n'); + if (p) { + len = p - s; + tmpstr = dc_malloc(len + 1); + strncpy(tmpstr, s, len); + tmpstr[len] = '\0'; + system(tmpstr); + free(tmpstr); + return p + 1; + } + system(s); + return s + strlen(s); +} + + +/* print out the indicated value */ +void +dc_print DC_DECLARG((value, obase)) + dc_data value DC_DECLSEP + int obase DC_DECLEND +{ + if (value.dc_type == DC_NUMBER) { + dc_out_num(value.v.number, obase, DC_TRUE, DC_FALSE); + } else if (value.dc_type == DC_STRING) { + dc_out_str(value.v.string, DC_TRUE, DC_FALSE); + } else { + dc_garbage("in data being printed", -1); + } +} + +/* return a duplicate of the passed value, regardless of type */ +dc_data +dc_dup DC_DECLARG((value)) + dc_data value DC_DECLEND +{ + if (value.dc_type!=DC_NUMBER && value.dc_type!=DC_STRING) + dc_garbage("in value being duplicated", -1); + if (value.dc_type == DC_NUMBER) + return dc_dup_num(value.v.number); + /*else*/ + return dc_dup_str(value.v.string); +} |
