parse-xml.c

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#define __USE_XOPEN
#include <time.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/tree.h>
#include <libxslt/transform.h>

#include "gettext.h"

#include<sqlite3.h>

#include "dive.h"
#include "device.h"

int verbose, quit;

static xmlDoc *test_xslt_transforms(xmlDoc *doc, const char **params, char **error);
char *xslt_path;

/* the dive table holds the overall dive list; target table points at
 * the table we are currently filling */
struct dive_table dive_table;
struct dive_table *target_table = NULL;

static void parser_error(char **error, const char *fmt, ...)
{
	va_list args;
	char *tmp;

	if (!error)
		return;

	tmp = malloc(1024);
	va_start(args, fmt);
	vsnprintf(tmp, 1024, fmt, args);
	va_end(args);

	if (*error) {
		int len = strlen(*error) + strlen(tmp) + 1;
		*error = realloc(*error, len);
		strncat(*error, tmp, strlen(tmp));
		free(tmp);
	} else {
		*error = tmp;
	}
}

/*
 * Add a dive into the dive_table array
 */
static void record_dive_to_table(struct dive *dive, struct dive_table *table)
{
	assert(table != NULL);
	int nr = table->nr, allocated = table->allocated;
	struct dive **dives = table->dives;

	if (nr >= allocated) {
		allocated = (nr + 32) * 3 / 2;
		dives = realloc(dives, allocated * sizeof(struct dive *));
		if (!dives)
			exit(1);
		table->dives = dives;
		table->allocated = allocated;
	}
	dives[nr] = fixup_dive(dive);
	table->nr = nr+1;
}

void record_dive(struct dive *dive)
{
	record_dive_to_table(dive, &dive_table);
}

static void start_match(const char *type, const char *name, char *buffer)
{
	if (verbose > 2)
		printf("Matching %s '%s' (%s)\n",
			type, name, buffer);
}

static void nonmatch(const char *type, const char *name, char *buffer)
{
	if (verbose > 1)
		printf("Unable to match %s '%s' (%s)\n",
			type, name, buffer);
}

typedef void (*matchfn_t)(char *buffer, void *);

static int match(const char *pattern, int plen,
		 const char *name,
		 matchfn_t fn, char *buf, void *data)
{
	switch (name[plen]) {
	case '\0': case '.':
		break;
	default:
		return 0;
	}
	if (memcmp(pattern, name, plen))
		return 0;
	fn(buf, data);
	return 1;
}


struct units xml_parsing_units;
const struct units SI_units = SI_UNITS;
const struct units IMPERIAL_units = IMPERIAL_UNITS;

/*
 * Dive info as it is being built up..
 */
static struct divecomputer *cur_dc;
static struct dive *cur_dive;
static dive_trip_t *cur_trip = NULL;
static struct sample *cur_sample;
static struct {
	int active;
	duration_t time;
	int type, flags, value;
	const char *name;
} cur_event;
static struct {
struct {
	const char *model;
	uint32_t deviceid;
	const char *nickname, *serial_nr, *firmware;
} dc;
} cur_settings;
static bool in_settings = FALSE;
static struct tm cur_tm;
static int cur_cylinder_index, cur_ws_index;
static int lastndl, laststoptime, laststopdepth, lastcns, lastpo2, lastindeco;
static int lastcylinderindex, lastsensor;

/*
 * If we don't have an explicit dive computer,
 * we use the implicit one that every dive has..
 */
static struct divecomputer *get_dc(void)
{
	return cur_dc ? : &cur_dive->dc;
}

static enum import_source {
	UNKNOWN,
	LIBDIVECOMPUTER,
	DIVINGLOG,
	UDDF,
} import_source;

static void divedate(char *buffer, void *_when)
{
	int d,m,y;
	int hh,mm,ss;
	timestamp_t *when = _when;

	hh = 0; mm = 0; ss = 0;
	if (sscanf(buffer, "%d.%d.%d %d:%d:%d", &d, &m, &y, &hh, &mm, &ss) >= 3) {
		/* This is ok, and we got at least the date */
	} else if (sscanf(buffer, "%d-%d-%d %d:%d:%d", &y, &m, &d, &hh, &mm, &ss) >= 3) {
		/* This is also ok */
	} else {
		fprintf(stderr, "Unable to parse date '%s'\n", buffer);
		return;
	}
	cur_tm.tm_year = y;
	cur_tm.tm_mon = m-1;
	cur_tm.tm_mday = d;
	cur_tm.tm_hour = hh;
	cur_tm.tm_min = mm;
	cur_tm.tm_sec = ss;

	*when = utc_mktime(&cur_tm);
}

static void divetime(char *buffer, void *_when)
{
	int h,m,s = 0;
	timestamp_t *when = _when;

	if (sscanf(buffer, "%d:%d:%d", &h, &m, &s) >= 2) {
		cur_tm.tm_hour = h;
		cur_tm.tm_min = m;
		cur_tm.tm_sec = s;
		*when = utc_mktime(&cur_tm);
	}
}

/* Libdivecomputer: "2011-03-20 10:22:38" */
static void divedatetime(char *buffer, void *_when)
{
	int y,m,d;
	int hr,min,sec;
	timestamp_t *when = _when;

	if (sscanf(buffer, "%d-%d-%d %d:%d:%d",
		&y, &m, &d, &hr, &min, &sec) == 6) {
		cur_tm.tm_year = y;
		cur_tm.tm_mon = m-1;
		cur_tm.tm_mday = d;
		cur_tm.tm_hour = hr;
		cur_tm.tm_min = min;
		cur_tm.tm_sec = sec;
		*when = utc_mktime(&cur_tm);
	}
}

enum ParseState {FINDSTART, FINDEND};
static void divetags(char *buffer, void *_tags)
{
	struct tag_entry *tags = _tags;
	char tag[128];
	int i = 0, start = 0, end = 0;
	enum ParseState state = FINDEND;
	i=0;
	while(i < strlen(buffer)) {
		if (buffer[i] == ',') {
			if (state == FINDSTART) {
				/* Detect empty tags */
			} else if (state == FINDEND) {
				/* Found end of tag */
				if (i > 1) {
					if(buffer[i-1] != '\\') {
						strncpy(tag, buffer+start, end-start+1);
						tag[end-start+1] = '\0';
						state=FINDSTART;
						taglist_add_tag(tags, tag);
					}
				} else {
					state=FINDSTART;
				}
			}
		} else if (buffer[i] == ' ') {
			/* Handled */
		} else {
			/* Found start of tag */
			if (state == FINDSTART) {
				state = FINDEND;
				start = i;
			} else if (state == FINDEND) {
				end=i;
			}
		}
		i++;
    }
    if (state == FINDEND) {
	    if (end < start)
		    end = strlen(buffer)-1;
	    if (strlen(buffer) > 0) {
		    strncpy(tag, buffer+start, end-start+1);
		    tag[end-start+1] = '\0';
		    taglist_add_tag(tags, tag);
	    }
    }
}

enum number_type {
	NEITHER,
	FLOAT
};

double ascii_strtod(char *str, char **ptr)
{
	char *p = str, c, *ep;
	double val = 0.0;
	double decimal;
	int sign = 0, esign = 0;
	int numbers = 0, dot = 0;

	/* skip spaces */
	while (isspace(c = *p++))
		/* */;

	/* optional sign */
	switch (c) {
	case '-':
		sign = 1;
		/* fallthrough */
	case '+':
		c = *p++;
	}

	/* Mantissa */
	for (;;c = *p++) {
		if (c == '.') {
			if (dot)
				goto done;
			dot = 1;
			decimal = 1.0;
			continue;
		}
		if (c >= '0' && c <= '9') {
			numbers++;
			if (dot) {
				decimal /= 10;
				val += (c - '0') * decimal;
			} else {
				val = (val * 10) + (c - '0');
			}
			continue;
		}
		if (c != 'e' && c != 'E')
			goto done;
		break;
	}

	if (!numbers)
		goto done;

	/* Exponent */
	ep = p;
	c = *ep++;
	switch (c) {
	case '-':
		esign = 1;
		/* fallthrough */
	case '+':
		c = *ep++;
	}

	if (c >= '0' && c <= '9') {
		p = ep;
		int exponent = c - '0';

		for (;;) {
			c = *p++;
			if (c < '0' || c > '9')
				break;
			exponent *= 10;
			exponent += c - '0';
		}

		/* We're not going to bother playing games */
		if (exponent > 308)
			exponent = 308;

		while (exponent-- > 0) {
			if (esign)
				val /= 10;
			else
				val *= 10;
		}
	}

done:
	if (!numbers)
		goto no_conversion;
	if (ptr)
		*ptr = p-1;
	return sign ? -val : val;

no_conversion:
	if (ptr)
		*ptr = str;
	return 0.0;
}

static enum number_type parse_float(char *buffer, double *res, char **endp)
{
	double val;
	static bool first_time = TRUE;

	errno = 0;
	val = ascii_strtod(buffer, endp);
	if (errno || *endp == buffer)
		return NEITHER;
	if (**endp == ',') {
		if (val == rint(val)) {
			/* we really want to send an error if this is a Subsurface native file
			 * as this is likely indication of a bug - but right now we don't have
			 * that information available */
			if (first_time) {
				fprintf(stderr, "Floating point value with decimal comma (%s)?\n", buffer);
				first_time = FALSE;
			}
			/* Try again */
			**endp = '.';
			val = ascii_strtod(buffer, endp);
		}
	}

	*res = val;
	return FLOAT;
}

union int_or_float {
	double fp;
};

static enum number_type integer_or_float(char *buffer, union int_or_float *res)
{
	char *end;
	return parse_float(buffer, &res->fp, &end);
}

static void pressure(char *buffer, void *_press)
{
	double mbar;
	pressure_t *pressure = _press;
	union int_or_float val;

	switch (integer_or_float(buffer, &val)) {
	case FLOAT:
		/* Just ignore zero values */
		if (!val.fp)
			break;
		switch (xml_parsing_units.pressure) {
		case PASCAL:
			mbar = val.fp / 100;
			break;
		case BAR:
			/* Assume mbar, but if it's really small, it's bar */
			mbar = val.fp;
			if (mbar < 5000)
				mbar = mbar * 1000;
			break;
		case PSI:
			mbar = val.fp * 68.95;
			break;
		}
		if (mbar > 5 && mbar < 500000) {
			pressure->mbar = mbar + 0.5;
			break;
		}
	/* fallthrough */
	default:
		printf("Strange pressure reading %s\n", buffer);
	}
}

static void salinity(char *buffer, void *_salinity)
{
	int *salinity = _salinity;
	union int_or_float val;
	switch (integer_or_float(buffer, &val)) {
	case FLOAT:
		*salinity = val.fp * 10.0 + 0.5;
		break;
	default:
		printf("Strange salinity reading %s\n", buffer);
	}
}

static void depth(char *buffer, void *_depth)
{
	depth_t *depth = _depth;
	union int_or_float val;

	switch (integer_or_float(buffer, &val)) {
	case FLOAT:
		switch (xml_parsing_units.length) {
		case METERS:
			depth->mm = val.fp * 1000 + 0.5;
			break;
		case FEET:
			depth->mm = val.fp * 304.8 + 0.5;
			break;
		}
		break;
	default:
		printf("Strange depth reading %s\n", buffer);
	}
}

static void weight(char *buffer, void *_weight)
{
	weight_t *weight = _weight;
	union int_or_float val;

	switch (integer_or_float(buffer, &val)) {
	case FLOAT:
		switch (xml_parsing_units.weight) {
		case KG:
			weight->grams = val.fp * 1000 + 0.5;
			break;
		case LBS:
			weight->grams = val.fp * 453.6 + 0.5;
			break;
		}
		break;
	default:
		printf("Strange weight reading %s\n", buffer);
	}
}

static void temperature(char *buffer, void *_temperature)
{
	temperature_t *temperature = _temperature;
	union int_or_float val;

	switch (integer_or_float(buffer, &val)) {
	case FLOAT:
		switch (xml_parsing_units.temperature) {
		case KELVIN:
			temperature->mkelvin = val.fp * 1000;
			break;
		case CELSIUS:
			temperature->mkelvin = val.fp * 1000 + ZERO_C_IN_MKELVIN + 0.5;
			break;
		case FAHRENHEIT:
			temperature->mkelvin = (val.fp + 459.67) * 5000/9;
			break;
		}
		break;
	default:
		printf("Strange temperature reading %s\n", buffer);
	}
	/* temperatures outside -40C .. +70C should be ignored */
	if (temperature->mkelvin < ZERO_C_IN_MKELVIN - 40000 ||
	    temperature->mkelvin > ZERO_C_IN_MKELVIN + 70000)
		temperature->mkelvin = 0;
}

static void sampletime(char *buffer, void *_time)
{
	int i;
	int min, sec;
	duration_t *time = _time;

	i = sscanf(buffer, "%d:%d", &min, &sec);
	switch (i) {
	case 1:
		sec = min;
		min = 0;
	/* fallthrough */
	case 2:
		time->seconds = sec + min*60;
		break;
	default:
		printf("Strange sample time reading %s\n", buffer);
	}
}

static void duration(char *buffer, void *_time)
{
	/* DivingLog 5.08 (and maybe other versions) appear to sometimes
	 * store the dive time as 44.00 instead of 44:00;
	 * This attempts to parse this in a fairly robust way */
	if (!strchr(buffer,':') && strchr(buffer,'.')) {
		char *mybuffer = strdup(buffer);
		char *dot = strchr(mybuffer,'.');
		*dot = ':';
		sampletime(mybuffer, _time);
	} else {
		sampletime(buffer, _time);
	}
}

static void percent(char *buffer, void *_fraction)
{
	fraction_t *fraction = _fraction;
	double val;
	char *end;

	switch (parse_float(buffer, &val, &end)) {
	case FLOAT:
		/* Turn fractions into percent unless explicit.. */
		if (val <= 1.0) {
			while (isspace(*end))
				end++;
			if (*end != '%')
				val *= 100;
		}

		/* Then turn percent into our integer permille format */
		if (val >= 0 && val <= 100.0) {
			fraction->permille = val * 10 + 0.5;
			break;
		}
	default:
		printf(translate("gettextFromC","Strange percentage reading %s\n"), buffer);
		break;
	}
}

static void gasmix(char *buffer, void *_fraction)
{
	/* libdivecomputer does negative percentages. */
	if (*buffer == '-')
		return;
	if (cur_cylinder_index < MAX_CYLINDERS)
		percent(buffer, _fraction);
}

static void gasmix_nitrogen(char *buffer, void *_gasmix)
{
	/* Ignore n2 percentages. There's no value in them. */
}

static void cylindersize(char *buffer, void *_volume)
{
	volume_t *volume = _volume;
	union int_or_float val;

	switch (integer_or_float(buffer, &val)) {
	case FLOAT:
		volume->mliter = val.fp * 1000 + 0.5;
		break;

	default:
		printf("Strange volume reading %s\n", buffer);
		break;
	}
}

static void utf8_string(char *buffer, void *_res)
{
	int size;
	char *res;
	while (isspace(*buffer))
		buffer++;
	size = strlen(buffer);
	while (size && isspace(buffer[size-1]))
		size--;
	if (!size)
		return;
	res = malloc(size + 1);
	memcpy(res, buffer, size);
	res[size] = 0;
	*(char **)_res = res;
}

#define MATCH(pattern, fn, dest) \
	match(pattern, strlen(pattern), name, fn, buf, dest)

static void get_index(char *buffer, void *_i)
{
	int *i = _i;
	*i = atoi(buffer);
}

static void get_rating(char *buffer, void *_i)
{
	int *i = _i;
	int j = atoi(buffer);
	if (j >= 0 && j <= 5) {
		*i = j;
	}
}

static void double_to_permil(char *buffer, void *_i)
{
	int *i = _i;
	*i = ascii_strtod(buffer, NULL) * 1000.0 + 0.5;
}

static void hex_value(char *buffer, void *_i)
{
	uint32_t *i = _i;
	*i = strtol(buffer, NULL, 16);
}

static void get_tripflag(char *buffer, void *_tf)
{
	tripflag_t *tf = _tf;
	*tf = strcmp(buffer, "NOTRIP") ? TF_NONE : NO_TRIP;
}

/*
 * Divinglog is crazy. The temperatures are in celsius. EXCEPT
 * for the sample temperatures, that are in Fahrenheit.
 * WTF?
 *
 * Oh, and I think Diving Log *internally* probably kept them
 * in celsius, because I'm seeing entries like
 *
 *	<Temp>32.0</Temp>
 *
 * in there. Which is freezing, aka 0 degC. I bet the "0" is
 * what Diving Log uses for "no temperature".
 *
 * So throw away crap like that.
 *
 * It gets worse. Sometimes the sample temperatures are in
 * Celsius, which apparently happens if you are in a SI
 * locale. So we now do:
 *
 * - temperatures < 32.0 == Celsius
 * - temperature == 32.0  -> garbage, it's a missing temperature (zero converted from C to F)
 * - temperatures > 32.0 == Fahrenheit
 */
static void fahrenheit(char *buffer, void *_temperature)
{
	temperature_t *temperature = _temperature;
	union int_or_float val;

	switch (integer_or_float(buffer, &val)) {
	case FLOAT:
		/* Floating point equality is evil, but works for small integers */
		if (val.fp == 32.0)
			break;
		if (val.fp < 32.0)
			temperature->mkelvin = C_to_mkelvin(val.fp);
		else
			temperature->mkelvin = F_to_mkelvin(val.fp);
		break;
	default:
		fprintf(stderr, "Crazy Diving Log temperature reading %s\n", buffer);
	}
}

/*
 * Did I mention how bat-shit crazy divinglog is? The sample
 * pressures are in PSI. But the tank working pressure is in
 * bar. WTF^2?
 *
 * Crazy stuff like this is why subsurface has everything in
 * these inconvenient typed structures, and you have to say
 * "pressure->mbar" to get the actual value. Exactly so that
 * you can never have unit confusion.
 *
 * It gets worse: sometimes apparently the pressures are in
 * bar, sometimes in psi. Dirk suspects that this may be a
 * DivingLog Uemis importer bug, and that they are always
 * supposed to be in bar, but that the importer got the
 * sample importing wrong.
 *
 * Sadly, there's no way to really tell. So I think we just
 * have to have some arbitrary cut-off point where we assume
 * that smaller values mean bar.. Not good.
 */
static void psi_or_bar(char *buffer, void *_pressure)
{
	pressure_t *pressure = _pressure;
	union int_or_float val;

	switch (integer_or_float(buffer, &val)) {
	case FLOAT:
		if (val.fp > 400)
			pressure->mbar = psi_to_mbar(val.fp);
		else
			pressure->mbar = val.fp * 1000 + 0.5;
		break;
	default:
		fprintf(stderr, "Crazy Diving Log PSI reading %s\n", buffer);
	}
}

static int divinglog_fill_sample(struct sample *sample, const char *name, char *buf)
{
	return	MATCH("time.p", sampletime, &sample->time) ||
		MATCH("depth.p", depth, &sample->depth) ||
		MATCH("temp.p", fahrenheit, &sample->temperature) ||
		MATCH("press1.p", psi_or_bar, &sample->cylinderpressure) ||
		0;
}

static void uddf_gasswitch(char *buffer, void *_sample)
{
	struct sample *sample = _sample;
	int idx = atoi(buffer);
	int seconds = sample->time.seconds;
	struct dive *dive = cur_dive;
	struct divecomputer *dc = get_dc();

	add_gas_switch_event(dive, dc, seconds, idx);
}

static int uddf_fill_sample(struct sample *sample, const char *name, char *buf)
{
	return	MATCH("divetime", sampletime, &sample->time) ||
		MATCH("depth", depth, &sample->depth) ||
		MATCH("temperature", temperature, &sample->temperature) ||
		MATCH("tankpressure", pressure, &sample->cylinderpressure) ||
		MATCH("ref.switchmix", uddf_gasswitch, sample) ||
		0;
}

static void eventtime(char *buffer, void *_duration)
{
	duration_t *duration = _duration;
	sampletime(buffer, duration);
	if (cur_sample)
		duration->seconds += cur_sample->time.seconds;
}

static void try_to_match_autogroup(const char *name, char *buf)
{
	int autogroupvalue;

	start_match("autogroup", name, buf);
	if (MATCH("state.autogroup", get_index, &autogroupvalue)) {
		set_autogroup(autogroupvalue);
		return;
	}
	nonmatch("autogroup", name, buf);
}

static void try_to_fill_dc_settings(const char *name, char *buf)
{
	start_match("divecomputerid", name, buf);
	if (MATCH("model.divecomputerid", utf8_string, &cur_settings.dc.model))
		return;
	if (MATCH("deviceid.divecomputerid", hex_value, &cur_settings.dc.deviceid))
		return;
	if (MATCH("nickname.divecomputerid", utf8_string, &cur_settings.dc.nickname))
		return;
	if (MATCH("serial.divecomputerid", utf8_string, &cur_settings.dc.serial_nr))
		return;
	if (MATCH("firmware.divecomputerid", utf8_string, &cur_settings.dc.firmware))
		return;

	nonmatch("divecomputerid", name, buf);
}

static void try_to_fill_event(const char *name, char *buf)
{
	start_match("event", name, buf);
	if (MATCH("event", utf8_string, &cur_event.name))
		return;
	if (MATCH("name", utf8_string, &cur_event.name))
		return;
	if (MATCH("time", eventtime, &cur_event.time))
		return;
	if (MATCH("type", get_index, &cur_event.type))
		return;
	if (MATCH("flags", get_index, &cur_event.flags))
		return;
	if (MATCH("value", get_index, &cur_event.value))
		return;
	nonmatch("event", name, buf);
}

static int match_dc_data_fields(struct divecomputer *dc, const char *name, char *buf)
{
	if (MATCH("maxdepth", depth, &dc->maxdepth))
		return 1;
	if (MATCH("meandepth", depth, &dc->meandepth))
		return 1;
	if (MATCH("max.depth", depth, &dc->maxdepth))
		return 1;
	if (MATCH("mean.depth", depth, &dc->meandepth))
		return 1;
	if (MATCH("duration", duration, &dc->duration))
		return 1;
	if (MATCH("divetime", duration, &dc->duration))
		return 1;
	if (MATCH("divetimesec", duration, &dc->duration))
		return 1;
	if (MATCH("surfacetime", duration, &dc->surfacetime))
		return 1;
	if (MATCH("airtemp", temperature, &dc->airtemp))
		return 1;
	if (MATCH("watertemp", temperature, &dc->watertemp))
		return 1;
	if (MATCH("air.temperature", temperature, &dc->airtemp))
		return 1;
	if (MATCH("water.temperature", temperature, &dc->watertemp))
		return 1;
	if (MATCH("pressure.surface", pressure, &dc->surface_pressure))
		return 1;
	if (MATCH("salinity.water", salinity, &dc->salinity))
		return 1;

	return 0;
}

/* We're in the top-level dive xml. Try to convert whatever value to a dive value */
static void try_to_fill_dc(struct divecomputer *dc, const char *name, char *buf)
{
	start_match("divecomputer", name, buf);

	if (MATCH("date", divedate, &dc->when))
		return;
	if (MATCH("time", divetime, &dc->when))
		return;
	if (MATCH("model", utf8_string, &dc->model))
		return;
	if (MATCH("deviceid", hex_value, &dc->deviceid))
		return;
	if (MATCH("diveid", hex_value, &dc->diveid))
		return;

	if (match_dc_data_fields(dc, name, buf))
		return;

	nonmatch("divecomputer", name, buf);
}

void add_gas_switch_event(struct dive *dive, struct divecomputer *dc, int seconds, int idx)
{
	/* The gas switch event format is insane. It will be fixed, I think */
	int o2 = dive->cylinder[idx].gasmix.o2.permille;
	int he = dive->cylinder[idx].gasmix.he.permille;
	int value;

	if (!o2)
		o2 = O2_IN_AIR;
	o2 = (o2+5) / 10;
	he = (he+5) / 10;
	value = o2 + (he << 16);

	add_event(dc, seconds, 25, 0, value, "gaschange");  /* SAMPLE_EVENT_GASCHANGE2 */
}

static void get_cylinderindex(char *buffer, void *_i)
{
	int *i = _i;
	*i = atoi(buffer);
	if (lastcylinderindex != *i) {
		add_gas_switch_event(cur_dive, get_dc(), cur_sample->time.seconds, *i);
		lastcylinderindex = *i;
	}
}

static void get_sensor(char *buffer, void *_i)
{
	int *i = _i;
	*i = atoi(buffer);
	lastsensor = *i;
}

/* We're in samples - try to convert the random xml value to something useful */
static void try_to_fill_sample(struct sample *sample, const char *name, char *buf)
{
	int in_deco;

	start_match("sample", name, buf);
	if (MATCH("pressure.sample", pressure, &sample->cylinderpressure))
		return;
	if (MATCH("cylpress.sample", pressure, &sample->cylinderpressure))
		return;
	if (MATCH("cylinderindex.sample", get_cylinderindex, &sample->sensor))
		return;
	if (MATCH("sensor.sample", get_sensor, &sample->sensor))
		return;
	if (MATCH("depth.sample", depth, &sample->depth))
		return;
	if (MATCH("temp.sample", temperature, &sample->temperature))
		return;
	if (MATCH("temperature.sample", temperature, &sample->temperature))
		return;
	if (MATCH("sampletime.sample", sampletime, &sample->time))
		return;
	if (MATCH("time.sample", sampletime, &sample->time))
		return;
	if (MATCH("ndl.sample", sampletime, &sample->ndl))
		return;
	if (MATCH("in_deco.sample", get_index, &in_deco)) {
		sample->in_deco = (in_deco == 1);
		return;
	}
	if (MATCH("stoptime.sample", sampletime, &sample->stoptime))
		return;
	if (MATCH("stopdepth.sample", depth, &sample->stopdepth))
		return;
	if (MATCH("cns.sample", get_index, &sample->cns))
		return;
	if (MATCH("po2.sample", double_to_permil, &sample->po2))
		return;

	switch (import_source) {
	case DIVINGLOG:
		if (divinglog_fill_sample(sample, name, buf))
			return;
		break;

	case UDDF:
		if (uddf_fill_sample(sample, name, buf))
			return;
		break;

	default:
		break;
	}

	nonmatch("sample", name, buf);
}

static const char *country, *city;

static void divinglog_place(char *place, void *_location)
{
	char **location = _location;
	char buffer[1024], *p;
	int len;

	len = snprintf(buffer, sizeof(buffer),
		"%s%s%s%s%s",
		place,
		city ? ", " : "",
		city ? city : "",
		country ? ", " : "",
		country ? country : "");

	p = malloc(len+1);
	memcpy(p, buffer, len+1);
	*location = p;

	city = NULL;
	country = NULL;
}

static int divinglog_dive_match(struct dive *dive, const char *name, char *buf)
{
	return	MATCH("divedate", divedate, &dive->when) ||
		MATCH("entrytime", divetime, &dive->when) ||
		MATCH("divetime", duration, &dive->dc.duration) ||
		MATCH("depth", depth, &dive->dc.maxdepth) ||
		MATCH("depthavg", depth, &dive->dc.meandepth) ||
		MATCH("tanktype", utf8_string, &dive->cylinder[0].type.description) ||
		MATCH("tanksize", cylindersize, &dive->cylinder[0].type.size) ||
		MATCH("presw", pressure, &dive->cylinder[0].type.workingpressure) ||
		MATCH("press", pressure, &dive->cylinder[0].start) ||
		MATCH("prese", pressure, &dive->cylinder[0].end) ||
		MATCH("comments", utf8_string, &dive->notes) ||
		MATCH("names.buddy", utf8_string, &dive->buddy) ||
		MATCH("name.country", utf8_string, &country) ||
		MATCH("name.city", utf8_string, &city) ||
		MATCH("name.place", divinglog_place, &dive->location) ||
		0;
}

/*
 * Uddf specifies ISO 8601 time format.
 *
 * There are many variations on that. This handles the useful cases.
 */
static void uddf_datetime(char *buffer, void *_when)
{
	char c;
	int y,m,d,hh,mm,ss;
	timestamp_t *when = _when;
	struct tm tm = { 0 };
	int i;

	i = sscanf(buffer, "%d-%d-%d%c%d:%d:%d", &y, &m, &d, &c, &hh, &mm, &ss);
	if (i == 7)
		goto success;
	ss = 0;
	if (i == 6)
		goto success;

	i = sscanf(buffer, "%04d%02d%02d%c%02d%02d%02d", &y, &m, &d, &c, &hh, &mm, &ss);
	if (i == 7)
		goto success;
	ss = 0;
	if (i == 6)
		goto success;
bad_date:
	printf("Bad date time %s\n", buffer);
	return;

success:
	if (c != 'T' && c != ' ')
		goto bad_date;
	tm.tm_year = y;
	tm.tm_mon = m - 1;
	tm.tm_mday = d;
	tm.tm_hour = hh;
	tm.tm_min = mm;
	tm.tm_sec = ss;
	*when = utc_mktime(&tm);
}

#define uddf_datedata(name, offset)				\
static void uddf_##name(char *buffer, void *_when)		\
{	timestamp_t *when = _when;				\
	cur_tm.tm_##name = atoi(buffer) + offset;		\
	*when = utc_mktime(&cur_tm); }

uddf_datedata(year, 0)
uddf_datedata(mon, -1)
uddf_datedata(mday, 0)
uddf_datedata(hour, 0)
uddf_datedata(min, 0)

static int uddf_dive_match(struct dive *dive, const char *name, char *buf)
{
	return	MATCH("datetime", uddf_datetime, &dive->when) ||
		MATCH("diveduration", duration, &dive->dc.duration) ||
		MATCH("greatestdepth", depth, &dive->dc.maxdepth) ||
		MATCH("year.date", uddf_year, &dive->when) ||
		MATCH("month.date", uddf_mon, &dive->when) ||
		MATCH("day.date", uddf_mday, &dive->when) ||
		MATCH("hour.time", uddf_hour, &dive->when) ||
		MATCH("minute.time", uddf_min, &dive->when) ||
		0;
}

/*
 * This parses "floating point" into micro-degrees.
 * We don't do exponentials etc, if somebody does
 * gps locations in that format, they are insane.
 */
static degrees_t parse_degrees(char *buf, char **end)
{
	int sign = 1, decimals = 6, value = 0;
	degrees_t ret;

	while (isspace(*buf))
		buf++;
	switch (*buf) {
	case '-':
		sign = -1;
		/* fallthrough */
	case '+':
		buf++;
	}
	while (isdigit(*buf)) {
		value = 10*value + *buf - '0';
		buf++;
	}

	/* Get the first six decimals if they exist */
	if (*buf == '.')
		buf++;
	do {
		value *= 10;
		if (isdigit(*buf)) {
			value += *buf - '0';
			buf++;
		}
	} while (--decimals);

	/* Rounding */
	switch (*buf) {
	case '5' ... '9':
		value++;
	}
	while (isdigit(*buf))
		buf++;

	*end = buf;
	ret.udeg = value * sign;
	return ret;
}

static void gps_lat(char *buffer, void *_dive)
{
	char *end;
	struct dive *dive = _dive;

	dive->latitude = parse_degrees(buffer, &end);
}

static void gps_long(char *buffer, void *_dive)
{
	char *end;
	struct dive *dive = _dive;

	dive->longitude = parse_degrees(buffer, &end);
}

static void gps_location(char *buffer, void *_dive)
{
	char *end;
	struct dive *dive = _dive;

	dive->latitude = parse_degrees(buffer, &end);
	dive->longitude = parse_degrees(end, &end);
}

/* We're in the top-level dive xml. Try to convert whatever value to a dive value */
static void try_to_fill_dive(struct dive *dive, const char *name, char *buf)
{
	start_match("dive", name, buf);

	switch (import_source) {
	case DIVINGLOG:
		if (divinglog_dive_match(dive, name, buf))
			return;
		break;

	case UDDF:
		if (uddf_dive_match(dive, name, buf))
			return;
		break;

	default:
		break;
	}

	if (MATCH("number", get_index, &dive->number))
		return;
	if (MATCH("tags", divetags, dive->tag_list))
		return;
	if (MATCH("tripflag", get_tripflag, &dive->tripflag))
		return;
	if (MATCH("date", divedate, &dive->when))
		return;
	if (MATCH("time", divetime, &dive->when))
		return;
	if (MATCH("datetime", divedatetime, &dive->when))
		return;
	/*
	 * Legacy format note: per-dive depths and duration get saved
	 * in the first dive computer entry
	 */
	if (match_dc_data_fields(&dive->dc, name, buf))
		return;

	if (MATCH("cylinderstartpressure", pressure, &dive->cylinder[0].start))
		return;
	if (MATCH("cylinderendpressure", pressure, &dive->cylinder[0].end))
		return;
	if (MATCH("gps", gps_location, dive))
		return;
	if (MATCH("Place", gps_location, dive))
		return;
	if (MATCH("latitude", gps_lat, dive))
		return;
	if (MATCH("sitelat", gps_lat, dive))
		return;
	if (MATCH("lat", gps_lat, dive))
		return;
	if (MATCH("longitude", gps_long, dive))
		return;
	if (MATCH("sitelon", gps_long, dive))
		return;
	if (MATCH("lon", gps_long, dive))
		return;
	if (MATCH("location", utf8_string, &dive->location))
		return;
	if (MATCH("name.dive", utf8_string, &dive->location))
		return;
	if (MATCH("suit", utf8_string, &dive->suit))
		return;
	if (MATCH("divesuit", utf8_string, &dive->suit))
		return;
	if (MATCH("notes", utf8_string, &dive->notes))
		return;
	if (MATCH("divemaster", utf8_string, &dive->divemaster))
		return;
	if (MATCH("buddy", utf8_string, &dive->buddy))
		return;
	if (MATCH("rating.dive", get_rating, &dive->rating))
		return;
	if (MATCH("visibility.dive", get_rating, &dive->visibility))
		return;
	if (MATCH("size.cylinder", cylindersize, &dive->cylinder[cur_cylinder_index].type.size))
		return;
	if (MATCH("workpressure.cylinder", pressure, &dive->cylinder[cur_cylinder_index].type.workingpressure))
		return;
	if (MATCH("description.cylinder", utf8_string, &dive->cylinder[cur_cylinder_index].type.description))
		return;
	if (MATCH("start.cylinder", pressure, &dive->cylinder[cur_cylinder_index].start))
		return;
	if (MATCH("end.cylinder", pressure, &dive->cylinder[cur_cylinder_index].end))
		return;
	if (MATCH("description.weightsystem", utf8_string, &dive->weightsystem[cur_ws_index].description))
		return;
	if (MATCH("weight.weightsystem", weight, &dive->weightsystem[cur_ws_index].weight))
		return;
	if (MATCH("weight", weight, &dive->weightsystem[cur_ws_index].weight))
		return;
	if (MATCH("o2", gasmix, &dive->cylinder[cur_cylinder_index].gasmix.o2))
		return;
	if (MATCH("o2percent", gasmix, &dive->cylinder[cur_cylinder_index].gasmix.o2))
		return;
	if (MATCH("n2", gasmix_nitrogen, &dive->cylinder[cur_cylinder_index].gasmix))
		return;
	if (MATCH("he", gasmix, &dive->cylinder[cur_cylinder_index].gasmix.he))
		return;
	if (MATCH("air.divetemperature", temperature, &dive->airtemp))
		return;

	nonmatch("dive", name, buf);
}

/* We're in the top-level trip xml. Try to convert whatever value to a trip value */
static void try_to_fill_trip(dive_trip_t **dive_trip_p, const char *name, char *buf)
{
	start_match("trip", name, buf);

	dive_trip_t *dive_trip = *dive_trip_p;

	if (MATCH("date", divedate, &dive_trip->when))
		return;
	if (MATCH("time", divetime, &dive_trip->when))
		return;
	if (MATCH("location", utf8_string, &dive_trip->location))
		return;
	if (MATCH("notes", utf8_string, &dive_trip->notes))
		return;

	nonmatch("trip", name, buf);
}

/*
 * While in some formats file boundaries are dive boundaries, in many
 * others (as for example in our native format) there are
 * multiple dives per file, so there can be other events too that
 * trigger a "new dive" marker and you may get some nesting due
 * to that. Just ignore nesting levels.
 * On the flipside it is possible that we start an XML file that ends
 * up having no dives in it at all - don't create a bogus empty dive
 * for those. It's not entirely clear what is the minimum set of data
 * to make a dive valid, but if it has no location, no date and no
 * samples I'm pretty sure it's useless.
 */
static bool is_dive(void)
{
	return (cur_dive &&
		(cur_dive->location || cur_dive->when || cur_dive->dc.samples));
}

static void reset_dc_info(struct divecomputer *dc)
{
	lastcns = lastpo2 = lastndl = laststoptime = laststopdepth = lastindeco = 0;
	lastsensor = lastcylinderindex = 0;
}

static void reset_dc_settings(void)
{
	free((void *)cur_settings.dc.model);
	free((void *)cur_settings.dc.nickname);
	free((void *)cur_settings.dc.serial_nr);
	free((void *)cur_settings.dc.firmware);
	cur_settings.dc.model = NULL;
	cur_settings.dc.nickname = NULL;
	cur_settings.dc.serial_nr = NULL;
	cur_settings.dc.firmware = NULL;
	cur_settings.dc.deviceid = 0;
}

static void settings_start(void)
{
	in_settings = TRUE;
}

static void settings_end(void)
{
	in_settings = FALSE;
}

static void dc_settings_start(void)
{
	reset_dc_settings();
}

static void dc_settings_end(void)
{
	create_device_node(cur_settings.dc.model, cur_settings.dc.deviceid, cur_settings.dc.serial_nr,
			   cur_settings.dc.firmware, cur_settings.dc.nickname);
	reset_dc_settings();
}

static void dive_start(void)
{
	if (cur_dive)
		return;
	cur_dive = alloc_dive();
	reset_dc_info(&cur_dive->dc);
	memset(&cur_tm, 0, sizeof(cur_tm));
	if (cur_trip) {
		add_dive_to_trip(cur_dive, cur_trip);
		cur_dive->tripflag = IN_TRIP;
	}
}

static void dive_end(void)
{
	if (!cur_dive)
		return;
	if (!is_dive())
		free(cur_dive);
	else
		record_dive_to_table(cur_dive, target_table);
	cur_dive = NULL;
	cur_dc = NULL;
	cur_cylinder_index = 0;
	cur_ws_index = 0;
}

static void trip_start(void)
{
	if (cur_trip)
		return;
	dive_end();
	cur_trip = calloc(sizeof(dive_trip_t),1);
	memset(&cur_tm, 0, sizeof(cur_tm));
}

static void trip_end(void)
{
	if (!cur_trip)
		return;
	insert_trip(&cur_trip);
	cur_trip = NULL;
}

static void event_start(void)
{
	memset(&cur_event, 0, sizeof(cur_event));
	cur_event.active = 1;
}

static void event_end(void)
{
	struct divecomputer *dc = get_dc();
	if (cur_event.name) {
		if (strcmp(cur_event.name, "surface") != 0)
			add_event(dc, cur_event.time.seconds,
				cur_event.type, cur_event.flags,
				cur_event.value, cur_event.name);
		free((void *)cur_event.name);
	}
	cur_event.active = 0;
}

static void cylinder_start(void)
{
}

static void cylinder_end(void)
{
	cur_cylinder_index++;
}

static void ws_start(void)
{
}

static void ws_end(void)
{
	cur_ws_index++;
}

static void sample_start(void)
{
	cur_sample = prepare_sample(get_dc());
	cur_sample->ndl.seconds = lastndl;
	cur_sample->in_deco = lastindeco;
	cur_sample->stoptime.seconds = laststoptime;
	cur_sample->stopdepth.mm = laststopdepth;
	cur_sample->cns = lastcns;
	cur_sample->po2 = lastpo2;
	cur_sample->sensor = lastsensor;
}

static void sample_end(void)
{
	if (!cur_dive)
		return;

	finish_sample(get_dc());
	lastndl = cur_sample->ndl.seconds;
	lastindeco = cur_sample->in_deco;
	laststoptime = cur_sample->stoptime.seconds;
	laststopdepth = cur_sample->stopdepth.mm;
	lastcns = cur_sample->cns;
	lastpo2 = cur_sample->po2;
	cur_sample = NULL;
}

static void divecomputer_start(void)
{
	struct divecomputer *dc;

	/* Start from the previous dive computer */
	dc = &cur_dive->dc;
	while (dc->next)
		dc = dc->next;

	/* Did we already fill that in? */
	if (dc->samples || dc->model || dc->when) {
		struct divecomputer *newdc = calloc(1, sizeof(*newdc));
		if (newdc) {
			dc->next = newdc;
			dc = newdc;
		}
	}

	/* .. this is the one we'll use */
	cur_dc = dc;
	reset_dc_info(dc);
}

static void divecomputer_end(void)
{
	if (!cur_dc->when)
		cur_dc->when = cur_dive->when;
	cur_dc = NULL;
}

static void entry(const char *name, char *buf)
{
	if (in_settings) {
		try_to_fill_dc_settings(name, buf);
		try_to_match_autogroup(name, buf);
		return;
	}
	if (cur_event.active) {
		try_to_fill_event(name, buf);
		return;
	}
	if (cur_sample) {
		try_to_fill_sample(cur_sample, name, buf);
		return;
	}
	if (cur_dc) {
		try_to_fill_dc(cur_dc, name, buf);
		return;
	}
	if (cur_dive) {
		try_to_fill_dive(cur_dive, name, buf);
		return;
	}
	if (cur_trip) {
		try_to_fill_trip(&cur_trip, name, buf);
		return;
	}
}

static const char *nodename(xmlNode *node, char *buf, int len)
{
	int levels = 2;
	char *p = buf;

	if (!node || !node->name)
		return "root";

	if (node->parent && !strcmp(node->name, "text"))
		node = node->parent;

	/* Make sure it's always NUL-terminated */
	p[--len] = 0;

	for(;;) {
		const char *name = node->name;
		char c;
		while ((c = *name++) != 0) {
			/* Cheaper 'tolower()' for ASCII */
			c = (c >= 'A' && c <= 'Z') ? c - 'A' + 'a' : c;
			*p++ = c;
			if (!--len)
				return buf;
		}
		*p = 0;
		node = node->parent;
		if (!node || !node->name)
			return buf;
		*p++ = '.';
		if (!--len)
			return buf;
		if (!--levels)
			return buf;
	}
}

#define MAXNAME 32

static void visit_one_node(xmlNode *node)
{
	char *content;
	char buffer[MAXNAME];
	const char *name;

	content = node->content;
	if (!content || xmlIsBlankNode(node))
		return;

	name = nodename(node, buffer, sizeof(buffer));

	entry(name, content);
}

static void traverse(xmlNode *root);

static void traverse_properties(xmlNode *node)
{
	xmlAttr *p;

	for (p = node->properties; p; p = p->next)
		traverse(p->children);
}

static void visit(xmlNode *n)
{
	visit_one_node(n);
	traverse_properties(n);
	traverse(n->children);
}

static void DivingLog_importer(void)
{
	import_source = DIVINGLOG;

	/*
	 * Diving Log units are really strange.
	 *
	 * Temperatures are in C, except in samples,
	 * when they are in Fahrenheit. Depths are in
	 * meters, an dpressure is in PSI in the samples,
	 * but in bar when it comes to working pressure.
	 *
	 * Crazy f*%^ morons.
	 */
	xml_parsing_units = SI_units;
}

static void uddf_importer(void)
{
	import_source = UDDF;
	xml_parsing_units = SI_units;
	xml_parsing_units.pressure = PASCAL;
	xml_parsing_units.temperature = KELVIN;
}

/*
 * I'm sure this could be done as some fancy DTD rules.
 * It's just not worth the headache.
 */
static struct nesting {
	const char *name;
	void (*start)(void), (*end)(void);
} nesting[] = {
	{ "divecomputerid", dc_settings_start, dc_settings_end },
	{ "settings", settings_start, settings_end },
	{ "dive", dive_start, dive_end },
	{ "Dive", dive_start, dive_end },
	{ "trip", trip_start, trip_end },
	{ "sample", sample_start, sample_end },
	{ "waypoint", sample_start, sample_end },
	{ "SAMPLE", sample_start, sample_end },
	{ "reading", sample_start, sample_end },
	{ "event", event_start, event_end },
	{ "mix", cylinder_start, cylinder_end },
	{ "gasmix", cylinder_start, cylinder_end },
	{ "cylinder", cylinder_start, cylinder_end },
	{ "weightsystem", ws_start, ws_end },
	{ "divecomputer", divecomputer_start, divecomputer_end },
	{ "P", sample_start, sample_end },

	/* Import type recognition */
	{ "Divinglog", DivingLog_importer },
	{ "uddf", uddf_importer },

	{ NULL, }
};

static void traverse(xmlNode *root)
{
	xmlNode *n;

	for (n = root; n; n = n->next) {
		struct nesting *rule = nesting;

		if (!n->name) {
			visit(n);
			continue;
		}

		do {
			if (!strcmp(rule->name, n->name))
				break;
			rule++;
		} while (rule->name);

		if (rule->start)
			rule->start();
		visit(n);
		if (rule->end)
			rule->end();
	}
}

/* Per-file reset */
static void reset_all(void)
{
	/*
	 * We reset the units for each file. You'd think it was
	 * a per-dive property, but I'm not going to trust people
	 * to do per-dive setup. If the xml does have per-dive
	 * data within one file, we might have to reset it per
	 * dive for that format.
	 */
	xml_parsing_units = SI_units;
	import_source = UNKNOWN;
}

/* divelog.de sends us xml files that claim to be iso-8859-1
 * but once we decode the HTML encoded characters they turn
 * into UTF-8 instead. So skip the incorrect encoding
 * declaration and decode the HTML encoded characters */
const char *preprocess_divelog_de(const char *buffer)
{
	char *ret = strstr(buffer, "<DIVELOGSDATA>");

	if (ret) {
		xmlParserCtxtPtr ctx;
		char buf[] = "";
		int i;

		for (i = 0; i < strlen(ret); ++i)
			if (!isascii(ret[i]))
				return buffer;

		ctx = xmlCreateMemoryParserCtxt(buf, sizeof(buf));
		ret = xmlStringLenDecodeEntities(ctx, ret, strlen(ret),  XML_SUBSTITUTE_REF, 0, 0, 0);

		return ret;
	}
	return buffer;
}

void parse_xml_buffer(const char *url, const char *buffer, int size,
			struct dive_table *table, const char **params, char **error)
{
	xmlDoc *doc;
	const char *res = preprocess_divelog_de(buffer);

	target_table = table;
	doc = xmlReadMemory(res, strlen(res), url, NULL, 0);
	if (res != buffer)
		free((char *)res);

	if (!doc) {
		fprintf(stderr, translate("gettextFromC","Failed to parse '%s'.\n"), url);
		parser_error(error, translate("gettextFromC","Failed to parse '%s'"), url);
		return;
	}
	reset_all();
	dive_start();
	doc = test_xslt_transforms(doc, params, error);
	traverse(xmlDocGetRootElement(doc));
	dive_end();
	xmlFreeDoc(doc);
}

extern int dm4_events(void *handle, int columns, char **data, char **column)
{
	event_start();
	if(data[1])
		cur_event.time.seconds = atoi(data[1]);

	if(data[2]) {
		switch (atoi(data[2])) {
			case 1:
				/* 1 Mandatory Safety Stop */
				cur_event.name = strdup("safety stop (mandatory)");
				break;
			case 3:
				/* 3 Deco */
				/* What is Subsurface's term for going to
				 * deco? */
				cur_event.name = strdup("deco");
				break;
			case 4:
				/* 4 Ascent warning */
				cur_event.name = strdup("ascent");
				break;
			case 5:
				/* 5 Ceiling broken */
				cur_event.name = strdup("violation");
				break;
			case 6:
				/* 6 Mandatory safety stop ceiling error */
				cur_event.name = strdup("violation");
				break;
			case 7:
				/* 7 Below deco floor */
				cur_event.name = strdup("below floor");
				break;
			case 8:
				/* 8 Dive time alarm */
				cur_event.name = strdup("divetime");
				break;
			case 9:
				/* 9 Depth alarm */
				cur_event.name = strdup("maxdepth");
				break;
			case 10:
				/* 10 OLF 80% */
			case 11:
				/* 11 OLF 100% */
				cur_event.name = strdup("OLF");
				break;
			case 12:
				/* 12 High ppO2 */
				cur_event.name = strdup("PO2");
				break;
			case 13:
				/* 13 Air time */
				cur_event.name = strdup("airtime");
				break;
			case 18:
				/* 18 Ceiling error */
				cur_event.name = strdup("ceiling");
				break;
			case 19:
				/* 19 Surfaced */
				cur_event.name = strdup("surface");
				break;
			case 257:
				/* 257 Dive active */
				/* This seems to be given after surface
				 * when descending again. Ignoring it. */
				break;
			case 258:
				/* 258 Bookmark */
				if (data[3]) {
					cur_event.name = strdup("heading");
					cur_event.value = atoi(data[3]);
				} else {
					cur_event.name = strdup("bookmark");
				}
				break;
			default:
				cur_event.name = strdup("unknown");
				cur_event.value = atoi(data[2]);
				break;
		}
	}
	event_end();

	return 0;
}

extern int dm4_dive(void *param, int columns, char **data, char **column)
{
	int i, interval, retval = 0;
	sqlite3 *handle = (sqlite3 *)param;
	float *profileBlob;
	unsigned char *tempBlob;
	int *pressureBlob;
	char *err = NULL;
	char get_events_template[] = "select * from Mark where DiveId = %d";
	char get_events[64];

	dive_start();
	cur_dive->number = atoi(data[0]);

	cur_dive->when = (time_t)(atol(data[1]));
	if (data[2])
		utf8_string(data[2], &cur_dive->notes);

	/*
	 * DM4 stores Duration and DiveTime. It looks like DiveTime is
	 * 10 to 60 seconds shorter than Duration. However, I have no
	 * idea what is the difference and which one should be used.
	 * Duration = data[3]
	 * DiveTime = data[15]
	 */
	if (data[3])
		cur_dive->duration.seconds = atoi(data[3]);
	if (data[15])
		cur_dive->dc.duration.seconds = atoi(data[15]);

	/*
	 * TODO: the deviceid hash should be calculated here.
	 */
	settings_start();
	dc_settings_start();
	if (data[4])
		utf8_string(data[4], &cur_settings.dc.serial_nr);
	if (data[5])
		utf8_string(data[5], &cur_settings.dc.model);

	cur_settings.dc.deviceid = 0xffffffff;
	dc_settings_end();
	settings_end();

	if (data[6])
		cur_dive->dc.maxdepth.mm = atof(data[6]) * 1000;
	if (data[8])
		cur_dive->dc.airtemp.mkelvin = (atoi(data[8]) + 273.15) * 1000;
	if (data[9])
		cur_dive->dc.watertemp.mkelvin  = (atoi(data[9]) + 273.15) * 1000;

	/*
	 * TODO: handle multiple cylinders
	 */
	cylinder_start();
	if (data[22] && atoi(data[22]) > 0)
		cur_dive->cylinder[cur_cylinder_index].start.mbar = atoi(data[22]);
	else if (data[10] && atoi(data[10]) > 0)
		cur_dive->cylinder[cur_cylinder_index].start.mbar = atoi(data[10]);
	if (data[23] && atoi(data[23]) > 0)
		cur_dive->cylinder[cur_cylinder_index].end.mbar = (atoi(data[23]));
	if (data[11] && atoi(data[11]) > 0)
		cur_dive->cylinder[cur_cylinder_index].end.mbar = (atoi(data[11]));
	if (data[12])
		cur_dive->cylinder[cur_cylinder_index].type.size.mliter = (atof(data[12])) * 1000;
	if (data[13])
		cur_dive->cylinder[cur_cylinder_index].type.workingpressure.mbar = (atoi(data[13]));
	if (data[20])
		cur_dive->cylinder[cur_cylinder_index].gasmix.o2.permille = atoi(data[20]) * 10;
	if (data[21])
		cur_dive->cylinder[cur_cylinder_index].gasmix.he.permille = atoi(data[21]) * 10;
	cylinder_end();

	if (data[14])
		cur_dive->dc.surface_pressure.mbar = (atoi(data[14]) * 1000);

	interval = data[16] ? atoi(data[16]) : 0;
	profileBlob = (float *)data[17];
	tempBlob = (unsigned char *)data[18];
	pressureBlob = (int *)data[19];
	for (i=0; interval && i * interval < cur_dive->duration.seconds; i++) {
		sample_start();
		cur_sample->time.seconds = i * interval;
		if (profileBlob)
			cur_sample->depth.mm = profileBlob[i] * 1000;
		else
			cur_sample->depth.mm = cur_dive->dc.maxdepth.mm;

		if (tempBlob)
			cur_sample->temperature.mkelvin = (tempBlob[i] + 273.15) * 1000;
		if (data[19] && data[19][0])
			cur_sample->cylinderpressure.mbar = pressureBlob[i] ;
		sample_end();
	}

	snprintf(get_events, sizeof(get_events) - 1, get_events_template, cur_dive->number);
	retval = sqlite3_exec(handle, get_events, &dm4_events, 0, &err);
	if (retval != SQLITE_OK) {
		fprintf(stderr, "%s", translate("gettextFromC","Database query get_events failed.\n"));
		return 1;
	}

	dive_end();

	/*
	for (i=0; i<columns;++i) {
		fprintf(stderr, "%s\t", column[i]);
	}
	fprintf(stderr, "\n");
	for (i=0; i<columns;++i) {
		fprintf(stderr, "%s\t", data[i]);
	}
	fprintf(stderr, "\n");
	//exit(0);
	*/
	return SQLITE_OK;
}

int parse_dm4_buffer(const char *url, const char *buffer, int size,
			struct dive_table *table, char **error)
{
	int retval;
	char *err = NULL;
	sqlite3 *handle;
	target_table = table;

	/* StartTime is converted from Suunto's nano seconds to standard
	 * time. We also need epoch, not seconds since year 1. */
	char get_dives[] = "select D.DiveId,StartTime/10000000-62135596800,Note,Duration,SourceSerialNumber,Source,MaxDepth,SampleInterval,StartTemperature,BottomTemperature,D.StartPressure,D.EndPressure,Size,CylinderWorkPressure,SurfacePressure,DiveTime,SampleInterval,ProfileBlob,TemperatureBlob,PressureBlob,Oxygen,Helium,MIX.StartPressure,MIX.EndPressure FROM Dive AS D JOIN DiveMixture AS MIX ON D.DiveId=MIX.DiveId";

	retval = sqlite3_open(url,&handle);

	if(retval) {
		fprintf(stderr, translate("gettextFromC","Database connection failed '%s'.\n"), url);
		return 1;
	}

	retval = sqlite3_exec(handle, get_dives, &dm4_dive, handle, &err);

	if (retval != SQLITE_OK) {
		fprintf(stderr, translate("gettextFromC","Database query failed '%s'.\n"), url);
		return 1;
	}

	sqlite3_close(handle);
	return 0;
}

void parse_xml_init(void)
{
	LIBXML_TEST_VERSION
}

void parse_xml_exit(void)
{
	xmlCleanupParser();
}

static xsltStylesheetPtr try_get_stylesheet(const char *path, int len, const char *name)
{
	xsltStylesheetPtr ret;
	int namelen = strlen(name);
	char *filename = malloc(len+1+namelen+1);

	if (!filename)
		return NULL;

	memcpy(filename, path, len);
#ifdef WIN32
	filename[len] = '\\';
#else
	filename[len] = '/';
#endif
	memcpy(filename + len + 1, name, namelen+1);

	ret = NULL;
	if (!access(filename, R_OK))
		ret = xsltParseStylesheetFile(filename);
	free(filename);

	return ret;
}

xsltStylesheetPtr get_stylesheet(const char *name)
{
	const char *path, *next;

	path = getenv("SUBSURFACE_XSLT_PATH");
	if (!path)
		path = xslt_path;

	do {
		int len;
		xsltStylesheetPtr ret;

		next = strchr(path, ':');
		len = strlen(path);
		if (next) {
			len = next - path;
			next++;
		}
		ret = try_get_stylesheet(path, len, name);
		if (ret)
			return ret;
	} while ((path = next) != NULL);

	return NULL;
}

static struct xslt_files {
	const char *root;
	const char *file;
} xslt_files[] = {
	{ "SUUNTO", "SuuntoSDM.xslt" },
	{ "Dive", "SuuntoDM4.xslt" },
	{ "JDiveLog", "jdivelog2subsurface.xslt" },
	{ "dives", "MacDive.xslt" },
	{ "DIVELOGSDATA", "divelogs.xslt" },
	{ "uddf", "uddf.xslt" },
	{ "UDDF", "uddf.xslt" },
	{ "profile", "udcf.xslt" },
	{ "Divinglog", "DivingLog.xslt" },
	{ "csv", "csv2xml.xslt" },
	{ NULL, }
};

static xmlDoc *test_xslt_transforms(xmlDoc *doc, const char **params, char **error)
{
	struct xslt_files *info = xslt_files;
	xmlDoc *transformed;
	xsltStylesheetPtr xslt = NULL;
	xmlNode *root_element = xmlDocGetRootElement(doc);
	char *attribute;

	while ((info->root) && (strcasecmp(root_element->name, info->root) != 0)) {
		info++;
	}

	if (info->root) {
		attribute = xmlGetProp(xmlFirstElementChild(root_element), "name");
		if (attribute) {
			if (strcasecmp(attribute, "subsurface") == 0) {
				free((void *)attribute);
				return doc;
			}
			free((void *)attribute);
		}

		xmlSubstituteEntitiesDefault(1);
		xslt = get_stylesheet(info->file);
		if (xslt == NULL) {
			parser_error(error, translate("gettextFromC","Can't open stylesheet (%s)/%s"), xslt_path, info->file);
			return doc;
		}
		transformed = xsltApplyStylesheet(xslt, doc, params);
		xmlFreeDoc(doc);
		xsltFreeStylesheet(xslt);

		return transformed;
	}
	return doc;
}