I have to process a file which comes from mainframes. There are some Non-Latin text in the file. I have to process this Non-Latin characters for some invalid characters. As the mainframe encodes the data in EBCDIC
format, I have to convert it to ASCII
to do the validation.
I used this code to convert from EBCDIC
to ASCII
. But when I execute the program for the sample input, I am getting Hello there]
instead of Hello there!
.
I also checked sample input against the EBCDIC
table.
I also generated the lookup table using this. But the same result.
- Am I doing anything wrong? Or is the lookup table wrong?
- Is there anyother way to validate for invalid chars without converting to
ASCII
?
Sample code is below...
#include <stdio.h>
static const unsigned char e2a[256] = {
0, 1, 2, 3,156, 9,134,127,151,141,142, 11, 12, 13, 14, 15,
16, 17, 18, 19,157,133, 8,135, 24, 25,146,143, 28, 29, 30, 31,
128,129,130,131,132, 10, 23, 27,136,137,138,139,140, 5, 6, 7,
144,145, 22,147,148,149,150, 4,152,153,154,155, 20, 21,158, 26,
32,160,161,162,163,164,165,166,167,168, 91, 46, 60, 40, 43, 33,
38,169,170,171,172,173,174,175,176,177, 93, 36, 42, 41, 59, 94,
45, 47,178,179,180,181,182,183,184,185,124, 44, 37, 95, 62, 63,
186,187,188,189,190,191,192,193,194, 96, 58, 35, 64, 39, 61, 34,
195, 97, 98, 99,100,101,102,103,104,105,196,197,198,199,200,201,
202,106,107,108,109,110,111,112,113,114,203,204,205,206,207,208,
209,126,115,116,117,118,119,120,121,122,210,211,212,213,214,215,
216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,
123, 65, 66, 67, 68, 69, 70, 71, 72, 73,232,233,234,235,236,237,
125, 74, 75, 76, 77, 78, 79, 80, 81, 82,238,239,240,241,242,243,
92,159, 83, 84, 85, 86, 87, 88, 89, 90,244,245,246,247,248,249,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57,250,251,252,253,254,255
};
void ebcdicToAscii (unsigned char *s)
{
while (*s)
{
*s = e2a[(int) (*s)];
s++;
}
}
int main (void) {
unsigned char str[] = "\xc8\x85\x93\x93\x96\x40\xa3\x88\x85\x99\x85\x5a";
ebcdicToAscii (str);
printf ("%s\n", str);
return 0;
}
Thanks in advance.
Your lookup table is wrong. It converts EBCDIC value 0x5A ('!') to (decimal) 93. ASCII decimal 93 is an ']'. So, your application works fine, it outputs the ']' character. You indicate that you generated the lookup table from a python sample that uses cp500 which is IBM code page 500. This code page indeed maps EBCDIC value 0x5A to the ']' character. If you would use the character set listed here for your lookup table, things would be ok.