FreeCalypso > hg > freecalypso-tools
changeset 329:18c692984549
uptools/libcoding: hex line decoding implemented
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 03 Feb 2018 20:37:14 +0000 |
parents | 978571e23318 |
children | d29b45c4c8db |
files | uptools/libcoding/Makefile uptools/libcoding/hexdecode.c |
diffstat | 2 files changed, 39 insertions(+), 1 deletions(-) [+] |
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--- a/uptools/libcoding/Makefile Sat Feb 03 20:07:05 2018 +0000 +++ b/uptools/libcoding/Makefile Sat Feb 03 20:37:14 2018 +0000 @@ -1,6 +1,7 @@ CC= gcc CFLAGS= -O2 -OBJS= decode_helpers.o gsm7_decode.o gsm7_decode_tables.o ucs2_decode.o +OBJS= decode_helpers.o gsm7_decode.o gsm7_decode_tables.o hexdecode.o \ + ucs2_decode.o LIB= libcoding.a all: ${LIB}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/uptools/libcoding/hexdecode.c Sat Feb 03 20:37:14 2018 +0000 @@ -0,0 +1,37 @@ +/* + * This library module implements decoding of long hex strings, + * such as SMS PDUs. + */ + +#include <sys/types.h> +#include <ctype.h> + +decode_hex_line(inbuf, outbuf, outmax) + char *inbuf; + u_char *outbuf; + unsigned outmax; +{ + char *inp = inbuf; + u_char *outp = outbuf; + unsigned outcnt = 0; + int c, d[2], i; + + while (*inp) { + if (!isxdigit(inp[0]) || !isxdigit(inp[1])) + return(-1); + if (outcnt >= outmax) + break; + for (i = 0; i < 2; i++) { + c = *inp++; + if (isdigit(c)) + d[i] = c - '0'; + else if (isupper(c)) + d[i] = c - 'A' + 10; + else + d[i] = c - 'a' + 10; + } + *outp++ = (d[0] << 4) | d[1]; + outcnt++; + } + return outcnt; +}