FreeCalypso > hg > sms-coding-utils
annotate libcoding/check_high_bit.c @ 13:b8d8f8a3cdb7
scripts: wrappers for network-side SMS-DELIVER PDU generation
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 27 Aug 2023 05:11:21 +0000 |
parents | 0fe95ca922c7 |
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rev | line source |
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0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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1 /* |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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2 * The function implemented in this module is intended for validating inputs |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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3 * that are expected to be in the form of GSM7 characters carried in an octet |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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4 * string, where the high bit of every octet is expected to be cleared. |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
5 */ |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
6 |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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7 #include <sys/types.h> |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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8 |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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9 check_high_bit(buf, len) |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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10 u_char *buf; |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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11 unsigned len; |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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12 { |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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13 unsigned n; |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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14 |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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15 for (n = 0; n < len; n++) { |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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16 if (buf[n] & 0x80) |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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17 return(-1); |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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18 } |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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19 return(0); |
0fe95ca922c7
sms-gen-tpdu: check the high bit of GSM7 msg input
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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20 } |