FreeCalypso > hg > fc-sim-tools
view libutil/decimal_str.c @ 53:fbedb67d234f
serial: fix parity for inverse coding convention
Important note: it is my (Mother Mychaela's) understanding that
SIM cards with inverse coding convention are extremely rare,
and I have never seen such a card. Therefore, our support for
the inverse coding convention will likely remain forever untested.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 21 Mar 2021 20:46:09 +0000 |
parents | 34bbb0585cab |
children |
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/* * This module implements some functions for initial parsing of decimal * string arguments, intended for implementation of commands like * write-iccid and write-imsi. */ #include <sys/types.h> #include <ctype.h> #include <stdio.h> parse_decimal_string_arg(arg, dest, maxdigits) char *arg; u_char *dest; unsigned maxdigits; { unsigned n, ndig; if (!*arg) { fprintf(stderr, "error: empty argument given for decimal string\n"); return(-1); } for (n = 0; *arg; ) { if (!isdigit(*arg)) { fprintf(stderr, "error: non-digit char in decimal string argument\n"); return(-1); } if (n >= maxdigits) { fprintf(stderr, "error: decimal string exceeds limit of %u digits\n", maxdigits); return(-1); } dest[n++] = *arg++ - '0'; } ndig = n; while (n < maxdigits) dest[n++] = 0xF; return ndig; }