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%{
#include <glib.h>
#include "rt-grammar.h"
guint8* parse_bytes(char *text);
enum nibble_t { high, low };
static char *in_buffer;
/* from libpcap */
#ifdef FLEX_SCANNER
#define YY_NO_UNPUT
#undef YY_INPUT
#define YY_INPUT(buf, result, max)\
{\
char *src = in_buffer;\
int i;\
\
if (*src == 0)\
result = YY_NULL;\
else {\
for (i = 0; *src && i < max; ++i)\
buf[i] = *src++;\
in_buffer += i;\
result = i;\
}\
}
#else
#undef getc
#define getc(fp) (*in_buffer == 0 ? EOF : *in_buffer++)
#endif
%}
N ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
B [0-9A-Fa-f][0-9A-Fa-f]?([-:.]?[0-9A-Fa-f][0-9A-Fa-f]?)*
W [A-Za-z_]
quoted \"[^"\n]*["\n]
%%
[\n\t ]+ /* eat whitespace */
{quoted} {
wtap_lval.s = g_string_new(wtap_text + 1);
g_string_truncate(wtap_lval.s, strlen(wtap_text) - 2);
return QUOTED;
}
";" return ';';
"," return ',';
"(" return '(';
")" return ')';
"@" return '@';
/* ct-compile: lex tokens */
eq return EQ;
ne return NE;
{B} {
wtap_lval.b = parse_bytes(wtap_text);
return BYTES;
}
{N} {
wtap_lval.d = atoi(wtap_text);
return NUMBER;
}
{W}+ {
wtap_lval.s = g_string_new(wtap_text);
return TEXT;
}
%%
guint8*
parse_bytes(char *text)
{
guint8 buffer[256];
guint8 index = 0;
char *cp;
char character;
guint8 byte_val=0;
gchar *dup_ptr;
enum nibble_t nibble = high;
for (cp = text; (*cp != '\x0') && index < 256; cp++) {
character = *cp;
if (nibble == high) {
/* assumes ASCII, not EBCDIC */
if (character >= '0' && character <= '9') {
byte_val = (character - '0') << 4;
}
else if (character >= 'A' && character <= 'F') {
byte_val = (character - 'A' + 10) << 4;
}
else if (character >= 'a' && character <= 'f') {
byte_val = (character - 'a' + 10) << 4;
}
else {
continue;
}
nibble = low;
continue;
}
else {
/* assumes ASCII, not EBCDIC */
if (character >= '0' && character <= '9') {
byte_val += (character - '0');
}
else if (character >= 'A' && character <= 'F') {
byte_val += (character - 'A' + 10);
}
else if (character >= 'a' && character <= 'f') {
byte_val += (character - 'a' + 10);
}
else {
byte_val >>= 4;
}
nibble = high;
buffer[index] = byte_val;
index++;
}
}
/* did we finish mid-nibble? */
if (nibble == low) {
buffer[index] = byte_val >> 4;
index++;
}
dup_ptr = g_malloc(index + 1);
dup_ptr[0] = index;
memcpy(dup_ptr + 1, buffer, index);
return dup_ptr;
}
void wtap_error(char *string)
{
g_error("%s\n",string);
exit(0);
}
void
wtap_lex_init(char *buf)
{
in_buffer = buf;
}
int
yywrap()
{
return 1;
}
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