FreeCalypso > hg > fc-sim-tools

annotate libutil/decimal_incr.c @ 53:fbedb67d234f

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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 9c9f6adbaedb
children
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1 /*
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2 * This module implements a function for incrementing decimal strings,
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3 * to be used in producing ranges of ICCID and IMSI numbers.
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4 */
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5
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6 #include <sys/types.h>
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7
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8 void
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9 decimal_string_increment(str, ndigits)
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10 u_char *str;
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11 unsigned ndigits;
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12 {
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13 u_char *p;
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14
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15 for (p = str + ndigits; p > str; ) {
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16 --p;
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17 (*p)++;
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18 if (*p < 10)
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19 return;
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20 *p = 0;
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21 }
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22 }