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/* $Id: sttype-range.c,v 1.1 2001/02/01 20:21:18 gram Exp $ */
/* The ideas in this code came from Ed Warnicke's original implementation
* of dranges for the old display filter code (Ethereal 0.8.15 and before).
* The code is different, but definitely inspired by his code.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <errno.h>
#include "proto.h"
#include "sttype-range.h"
typedef struct {
guint32 magic;
header_field_info *hfinfo;
gint start;
gint end;
char *start_error;
char *end_error;
} range_t;
#define RANGE_MAGIC 0xec0990ce
static gpointer
range_new(gpointer junk)
{
range_t *range;
g_assert(junk == NULL);
range = g_new(range_t, 1);
range->magic = RANGE_MAGIC;
range->hfinfo = NULL;
range->start = 0;
range->end = -1;
range->start_error = NULL;
range->end_error = NULL;
return (gpointer) range;
}
static void
range_free(gpointer value)
{
range_t *range = value;
assert_magic(range, RANGE_MAGIC);
if (range->start_error)
g_free(range->start_error);
if (range->end_error)
g_free(range->end_error);
g_free(range);
}
static gint
string_to_gint(char *s, gboolean *success)
{
char *endptr;
gint val;
*success = TRUE;
val = strtol(s, &endptr, 0);
if (endptr == s || *endptr != '\0') {
*success = FALSE;
}
else if (errno == ERANGE) {
*success = FALSE;
}
return val;
}
static void
range_set(stnode_t *node, stnode_t *field, char *start, char *end)
{
range_t *range;
gboolean success;
range = stnode_data(node);
assert_magic(range, RANGE_MAGIC);
range->hfinfo = stnode_data(field);
stnode_free(field);
if (start) {
range->start = string_to_gint(start, &success);
if (!success) {
/* Save the error-causing string for later reporting */
range->start_error = g_strdup(start);
}
}
else {
range->start = 0;
}
if (end) {
range->end = string_to_gint(end, &success);
if (!success) {
/* Save the error-causing string for later reporting */
range->end_error = g_strdup(end);
}
}
else {
range->end = G_MAXINT;
}
}
void
sttype_range_set(stnode_t *node, stnode_t *field, stnode_t *start, stnode_t *end)
{
char *start_str, *end_str;
if (start) {
start_str = stnode_data(start);
}
else {
start_str = NULL;
}
if (end) {
end_str = stnode_data(end);
}
else {
end_str = NULL;
}
range_set(node, field, start_str, end_str);
if (start)
stnode_free(start);
if (end)
stnode_free(end);
}
void
sttype_range_set1(stnode_t *node, stnode_t *field, stnode_t *offset)
{
char *offset_str;
g_assert(offset);
offset_str = stnode_data(offset);
range_set(node, field, offset_str, "1");
stnode_free(offset);
}
STTYPE_ACCESSOR(header_field_info*, range, hfinfo, RANGE_MAGIC)
STTYPE_ACCESSOR(gint, range, start, RANGE_MAGIC)
STTYPE_ACCESSOR(gint, range, end, RANGE_MAGIC)
STTYPE_ACCESSOR(char*, range, start_error, RANGE_MAGIC)
STTYPE_ACCESSOR(char*, range, end_error, RANGE_MAGIC)
void
sttype_register_range(void)
{
static sttype_t range_type = {
STTYPE_RANGE,
"RANGE",
range_new,
range_free,
};
sttype_register(&range_type);
}
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