wsutil/clopts_common.c

   1 /* clopts_common.c
   2  * Handle command-line arguments common to various programs
   3  *
   4  * Wireshark - Network traffic analyzer
   5  * By Gerald Combs <gerald@wireshark.org>
   6  * Copyright 1998 Gerald Combs
   7  *
   8  * SPDX-License-Identifier: GPL-2.0-or-later
   9  */
  10
  11 #include "config.h"
  12
  13 #include "clopts_common.h"
  14
  15 #include <stdlib.h>
  16 #include <errno.h>
  17
  18 #include <wsutil/strtoi.h>
  19 #include <wsutil/cmdarg_err.h>
  20
  21 int
  22 get_natural_int(const char *string, const char *name)
  23 {
  24     int32_t number;
  25
  26     if (!ws_strtoi32(string, NULL, &number)) {
  27         if (errno == EINVAL) {
  28             cmdarg_err("The specified %s \"%s\" isn't a decimal number", name, string);
  29             exit(1);
  30         }
  31         if (number < 0) {
  32             cmdarg_err("The specified %s \"%s\" is a negative number", name, string);
  33             exit(1);
  34         }
  35         cmdarg_err("The specified %s \"%s\" is too large (greater than %d)",
  36                 name, string, number);
  37         exit(1);
  38     }
  39     if (number < 0) {
  40         cmdarg_err("The specified %s \"%s\" is a negative number", name, string);
  41         exit(1);
  42     }
  43     return (int)number;
  44 }
  45
  46 int
  47 get_positive_int(const char *string, const char *name)
  48 {
  49     int number;
  50
  51     number = get_natural_int(string, name);
  52
  53     if (number == 0) {
  54         cmdarg_err("The specified %s is zero", name);
  55         exit(1);
  56     }
  57
  58     return number;
  59 }
  60
  61 uint32_t
  62 get_uint32(const char *string, const char *name)
  63 {
  64     uint32_t number;
  65
  66     if (!ws_strtou32(string, NULL, &number)) {
  67         if (errno == EINVAL) {
  68             cmdarg_err("The specified %s \"%s\" isn't a decimal number", name, string);
  69             exit(1);
  70         }
  71         cmdarg_err("The specified %s \"%s\" is too large (greater than %d)",
  72                 name, string, number);
  73         exit(1);
  74     }
  75     return number;
  76 }
  77
  78 uint32_t
  79 get_nonzero_uint32(const char *string, const char *name)
  80 {
  81     uint32_t number;
  82
  83     number = get_uint32(string, name);
  84
  85     if (number == 0) {
  86         cmdarg_err("The specified %s is zero", name);
  87         exit(1);
  88     }
  89
  90     return number;
  91 }
  92
  93 uint64_t
  94 get_uint64(const char *string, const char *name)
  95 {
  96     uint64_t number;
  97
  98     if (!ws_strtou64(string, NULL, &number)) {
  99         if (errno == EINVAL) {
 100             cmdarg_err("The specified %s \"%s\" isn't a decimal number", name, string);
 101             exit(1);
 102         }
 103         cmdarg_err("The specified %s \"%s\" is too large (greater than %" PRIu64 ")",
 104                 name, string, number);
 105         exit(1);
 106     }
 107     return number;
 108 }
 109
 110 uint64_t
 111 get_nonzero_uint64(const char *string, const char *name)
 112 {
 113     uint64_t number;
 114
 115     number = get_uint64(string, name);
 116
 117     if (number == 0) {
 118         cmdarg_err("The specified %s is zero", name);
 119         exit(1);
 120     }
 121
 122     return number;
 123 }
 124
 125 double
 126 get_positive_double(const char *string, const char *name)
 127 {
 128     double number = g_ascii_strtod(string, NULL);
 129
 130     if (errno == EINVAL) {
 131         cmdarg_err("The specified %s \"%s\" isn't a floating point number", name, string);
 132         exit(1);
 133     }
 134     if (number < 0.0) {
 135         cmdarg_err("The specified %s \"%s\" is a negative number", name, string);
 136         exit(1);
 137     }
 138
 139     return number;
 140 }