FreeCalypso > hg > fc-sim-tools
comparison libutil/decimal_str.c @ 8:34bbb0585cab
libutil: import from previous fc-pcsc-tools version
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 14 Mar 2021 05:42:37 +0000 |
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7:b25d4dfe5798 | 8:34bbb0585cab |
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1 /* | |
2 * This module implements some functions for initial parsing of decimal | |
3 * string arguments, intended for implementation of commands like | |
4 * write-iccid and write-imsi. | |
5 */ | |
6 | |
7 #include <sys/types.h> | |
8 #include <ctype.h> | |
9 #include <stdio.h> | |
10 | |
11 parse_decimal_string_arg(arg, dest, maxdigits) | |
12 char *arg; | |
13 u_char *dest; | |
14 unsigned maxdigits; | |
15 { | |
16 unsigned n, ndig; | |
17 | |
18 if (!*arg) { | |
19 fprintf(stderr, | |
20 "error: empty argument given for decimal string\n"); | |
21 return(-1); | |
22 } | |
23 for (n = 0; *arg; ) { | |
24 if (!isdigit(*arg)) { | |
25 fprintf(stderr, | |
26 "error: non-digit char in decimal string argument\n"); | |
27 return(-1); | |
28 } | |
29 if (n >= maxdigits) { | |
30 fprintf(stderr, | |
31 "error: decimal string exceeds limit of %u digits\n", | |
32 maxdigits); | |
33 return(-1); | |
34 } | |
35 dest[n++] = *arg++ - '0'; | |
36 } | |
37 ndig = n; | |
38 while (n < maxdigits) | |
39 dest[n++] = 0xF; | |
40 return ndig; | |
41 } |