annotate uptools/libcoding/alpha_addr.c @ 965:2969032bdfac

fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing The only 100% safe way to pass a NULL pointer as a function argument in K&R C is to cast 0 to a pointer type; failing to do so may cause mysterious bugs (invalid stack frames or garbage in argument registers) on 64-bit machines. This issue has already been fixed in most of FC host tools, but I just found some missed spots: passing of NULL UDH to PDU encoding functions in fcup-smsend[mult] in the case of single (not concatenated) SMS.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 01 Sep 2023 07:33:51 +0000
parents 74d5e95ee84a
children
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74d5e95ee84a uptools/libcoding: alphabetic address handling implemented
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1 /*
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2 * This library module contains some bits that help working with
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3 * alphabetic addresses.
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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 u_char alpha_septets_to_digits[12] = {0, 2, 4, 6, 7, 9, 11, 13, 14, 16, 18, 20};
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9
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10 alpha_addr_valid(ndigits, sepp)
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11 unsigned ndigits, *sepp;
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12 {
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13 unsigned n;
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14
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15 for (n = 1; n <= 11; n++)
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16 if (alpha_septets_to_digits[n] == ndigits) {
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17 *sepp = n;
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18 return(1);
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19 }
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20 return(0);
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21 }