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mm_areacode.c
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mm_areacode.c
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/*
* Code to dump area codes list from Nortel Millennium
* payphone table 0x97
*
* www.github.com/hharte/mm_manager
*
* (c) 2020, Howard M. Harte
*
* Table 0x97 is an array of 400 bytes, where each nibble corresponds
* to one of the area codes from 200-999.
*
* Each nibble contains a value representing the type of area code
* as follows:
* 0 - Invalid (for example, 211, 311, 800, 900)
* 2 - Unassigned at this time.
* 4 - US / Canada Area Code.
* 6 - International Area Code (for example, the Bahamas.)
*
*/
#include<stdio.h>
char *str_flags[4] = {
"---",
" ",
"USA",
"For"
};
int main(int argc, char *argv[])
{
FILE *instream;
unsigned char c;
unsigned char flags0, flags1;
int areacode = 200;
if (argc <= 1) {
printf("Usage:\n" \
"\tmm_areacode mm_table_97.bin\n");
return (-1);
}
instream = fopen(argv[1], "rb");
printf("Nortel Millennium NPA (Table 0x97) Dump");
while(1) {
c = fgetc(instream);
if (feof(instream)) break;
if (areacode % 200 == 0) {
printf("\n+-----------------------------------------------------------------+\n" \
"| NPA | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |\n" \
"+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+");
}
if (areacode % 10 == 0) {
printf("\n| %02dx |", areacode / 10);
}
flags0 = (c & 0xf0) >> 4;
flags1 = c & 0x0f;
if (argc < 3) {
printf(" %s | %s |", str_flags[flags0 >> 1], str_flags[flags1 >> 1]);
} else {
printf(" %x | %x |", flags0, flags1);
}
areacode += 2;
}
printf("\n+-----------------------------------------------------------------+\n");
return 0;
}