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-rw-r--r--parse-xml.c593
1 files changed, 593 insertions, 0 deletions
diff --git a/parse-xml.c b/parse-xml.c
new file mode 100644
index 000000000..58d446db0
--- /dev/null
+++ b/parse-xml.c
@@ -0,0 +1,593 @@
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <time.h>
+#include <libxml/parser.h>
+#include <libxml/tree.h>
+
+#include "dive.h"
+
+int verbose;
+
+struct dive_table dive_table;
+
+/*
+ * Add a dive into the dive_table array
+ */
+static void record_dive(struct dive *dive)
+{
+ int nr = dive_table.nr, allocated = dive_table.allocated;
+ struct dive **dives = dive_table.dives;
+
+ if (nr >= allocated) {
+ allocated = (nr + 32) * 3 / 2;
+ dives = realloc(dives, allocated * sizeof(struct dive *));
+ if (!dives)
+ exit(1);
+ dive_table.dives = dives;
+ dive_table.allocated = allocated;
+ }
+ dives[nr] = dive;
+ dive_table.nr = nr+1;
+}
+
+static void nonmatch(const char *type, const char *fullname, const char *name, char *buffer)
+{
+ if (verbose > 1)
+ printf("Unable to match %s '(%.*s)%s' (%s)\n", type,
+ (int) (name - fullname), fullname, name,
+ buffer);
+ free(buffer);
+}
+
+static const char *last_part(const char *name)
+{
+ const char *p = strrchr(name, '.');
+ return p ? p+1 : name;
+}
+
+typedef void (*matchfn_t)(char *buffer, void *);
+
+static int match(const char *pattern, const char *name, matchfn_t fn, char *buf, void *data)
+{
+ if (strcasecmp(pattern, name))
+ return 0;
+ fn(buf, data);
+ return 1;
+}
+
+/*
+ * Dive info as it is being built up..
+ */
+static int alloc_samples;
+static struct dive *dive;
+static struct sample *sample;
+static struct tm tm;
+
+static time_t utc_mktime(struct tm *tm)
+{
+ static const int mdays[] = {
+ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
+ };
+ int year = tm->tm_year;
+ int month = tm->tm_mon;
+ int day = tm->tm_mday;
+
+ /* First normalize relative to 1900 */
+ if (year < 70)
+ year += 100;
+ else if (year > 1900)
+ year -= 1900;
+
+ /* Normalized to Jan 1, 1970: unix time */
+ year -= 70;
+
+ if (year < 0 || year > 129) /* algo only works for 1970-2099 */
+ return -1;
+ if (month < 0 || month > 11) /* array bounds */
+ return -1;
+ if (month < 2 || (year + 2) % 4)
+ day--;
+ if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_sec < 0)
+ return -1;
+ return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL +
+ tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec;
+}
+
+static void divedate(char *buffer, void *_when)
+{
+ int d,m,y;
+ time_t *when = _when;
+
+ if (sscanf(buffer, "%d.%d.%d", &d, &m, &y) == 3) {
+ tm.tm_year = y;
+ tm.tm_mon = m-1;
+ tm.tm_mday = d;
+ if (tm.tm_sec | tm.tm_min | tm.tm_hour)
+ *when = utc_mktime(&tm);
+ }
+ free(buffer);
+}
+
+static void divetime(char *buffer, void *_when)
+{
+ int h,m,s = 0;
+ time_t *when = _when;
+
+ if (sscanf(buffer, "%d:%d:%d", &h, &m, &s) >= 2) {
+ tm.tm_hour = h;
+ tm.tm_min = m;
+ tm.tm_sec = s;
+ if (tm.tm_year)
+ *when = utc_mktime(&tm);
+ }
+ free(buffer);
+}
+
+/* Libdivecomputer: "2011-03-20 10:22:38" */
+static void divedatetime(char *buffer, void *_when)
+{
+ int y,m,d;
+ int hr,min,sec;
+ time_t *when = _when;
+
+ if (sscanf(buffer, "%d-%d-%d %d:%d:%d",
+ &y, &m, &d, &hr, &min, &sec) == 6) {
+ tm.tm_year = y;
+ tm.tm_mon = m-1;
+ tm.tm_mday = d;
+ tm.tm_hour = hr;
+ tm.tm_min = min;
+ tm.tm_sec = sec;
+ *when = utc_mktime(&tm);
+ }
+ free(buffer);
+}
+
+union int_or_float {
+ long i;
+ double fp;
+};
+
+enum number_type {
+ NEITHER,
+ INTEGER,
+ FLOAT
+};
+
+static enum number_type integer_or_float(char *buffer, union int_or_float *res)
+{
+ char *end;
+ long val;
+ double fp;
+
+ /* Integer or floating point? */
+ val = strtol(buffer, &end, 10);
+ if (val < 0 || end == buffer)
+ return NEITHER;
+
+ /* Looks like it might be floating point? */
+ if (*end == '.') {
+ errno = 0;
+ fp = strtod(buffer, &end);
+ if (!errno) {
+ res->fp = fp;
+ return FLOAT;
+ }
+ }
+
+ res->i = val;
+ return INTEGER;
+}
+
+static void pressure(char *buffer, void *_press)
+{
+ pressure_t *pressure = _press;
+ union int_or_float val;
+
+ switch (integer_or_float(buffer, &val)) {
+ case FLOAT:
+ /* Maybe it's in Bar? */
+ if (val.fp < 500.0) {
+ pressure->mbar = val.fp * 1000;
+ break;
+ }
+ printf("Unknown fractional pressure reading %s\n", buffer);
+ break;
+
+ case INTEGER:
+ /*
+ * Random integer? Maybe in PSI? Or millibar already?
+ *
+ * We assume that 5 bar is a ridiculous tank pressure,
+ * so if it's smaller than 5000, it's in PSI..
+ */
+ if (val.i < 5000) {
+ pressure->mbar = val.i * 68.95;
+ break;
+ }
+ pressure->mbar = val.i;
+ break;
+ default:
+ printf("Strange pressure reading %s\n", buffer);
+ }
+ free(buffer);
+}
+
+static void depth(char *buffer, void *_depth)
+{
+ depth_t *depth = _depth;
+ union int_or_float val;
+
+ switch (integer_or_float(buffer, &val)) {
+ /* All values are probably in meters */
+ case INTEGER:
+ val.fp = val.i;
+ /* fallthrough */
+ case FLOAT:
+ depth->mm = val.fp * 1000;
+ break;
+ default:
+ printf("Strange depth reading %s\n", buffer);
+ }
+ free(buffer);
+}
+
+static void temperature(char *buffer, void *_temperature)
+{
+ temperature_t *temperature = _temperature;
+ union int_or_float val;
+
+ switch (integer_or_float(buffer, &val)) {
+ /* C or F? Who knows? Let's default to Celsius */
+ case INTEGER:
+ val.fp = val.i;
+ /* Fallthrough */
+ case FLOAT:
+ /* Ignore zero. It means "none" */
+ if (!val.fp)
+ break;
+ /* Celsius */
+ if (val.fp < 50.0) {
+ temperature->mkelvin = (val.fp + 273.16) * 1000;
+ break;
+ }
+ /* Fahrenheit */
+ if (val.fp < 212.0) {
+ temperature->mkelvin = (val.fp + 459.67) * 5000/9;
+ break;
+ }
+ /* Kelvin or already millikelvin */
+ if (val.fp < 1000.0)
+ val.fp *= 1000;
+ temperature->mkelvin = val.fp;
+ break;
+ default:
+ printf("Strange temperature reading %s\n", buffer);
+ }
+ free(buffer);
+}
+
+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);
+ }
+ free(buffer);
+}
+
+static void duration(char *buffer, void *_time)
+{
+ sampletime(buffer, _time);
+}
+
+static void ignore(char *buffer, void *_time)
+{
+}
+
+/* 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)
+{
+ const char *last = last_part(name);
+
+ if (match("pressure", last, pressure, buf, &sample->tankpressure))
+ return;
+ if (match("cylpress", last, pressure, buf, &sample->tankpressure))
+ return;
+ if (match("depth", last, depth, buf, &sample->depth))
+ return;
+ if (match("temperature", last, temperature, buf, &sample->temperature))
+ return;
+ if (match("sampletime", last, sampletime, buf, &sample->time))
+ return;
+ if (match("time", last, sampletime, buf, &sample->time))
+ return;
+
+ nonmatch("sample", name, last, buf);
+}
+
+/* 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)
+{
+ const char *last = last_part(name);
+
+ if (match("date", last, divedate, buf, &dive->when))
+ return;
+ if (match("time", last, divetime, buf, &dive->when))
+ return;
+ if (match("datetime", last, divedatetime, buf, &dive->when))
+ return;
+ if (match("maxdepth", last, depth, buf, &dive->maxdepth))
+ return;
+ if (match("meandepth", last, depth, buf, &dive->meandepth))
+ return;
+ if (match("divetime", last, duration, buf, &dive->duration))
+ return;
+ if (match("divetimesec", last, duration, buf, &dive->duration))
+ return;
+ if (match("surfacetime", last, duration, buf, &dive->surfacetime))
+ return;
+ if (match("airtemp", last, temperature, buf, &dive->airtemp))
+ return;
+ if (match("watertemp", last, temperature, buf, &dive->watertemp))
+ return;
+ if (match("cylinderstartpressure", last, pressure, buf, &dive->beginning_pressure))
+ return;
+ if (match("cylinderendpressure", last, pressure, buf, &dive->end_pressure))
+ return;
+ if (match("divenumber", last, ignore, buf, NULL))
+ return;
+ if (match("diveseries", last, ignore, buf, NULL))
+ return;
+ if (match("number", last, ignore, buf, NULL))
+ return;
+ if (match("size", last, ignore, buf, NULL))
+ return;
+ if (match("fingerprint", last, ignore, buf, NULL))
+ return;
+ nonmatch("dive", name, last, buf);
+}
+
+static unsigned int dive_size(int samples)
+{
+ return sizeof(struct dive) + samples*sizeof(struct sample);
+}
+
+/*
+ * File boundaries are dive boundaries. But sometimes 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.
+ */
+static void dive_start(void)
+{
+ unsigned int size;
+
+ if (dive)
+ return;
+
+ alloc_samples = 5;
+ size = dive_size(alloc_samples);
+ dive = malloc(size);
+ if (!dive)
+ exit(1);
+ memset(dive, 0, size);
+ memset(&tm, 0, sizeof(tm));
+}
+
+static char *generate_name(struct dive *dive)
+{
+ int len;
+ struct tm *tm;
+ char buffer[256], *p;
+
+ tm = gmtime(&dive->when);
+
+ len = snprintf(buffer, sizeof(buffer),
+ "%04d-%02d-%02d "
+ "%02d:%02d:%02d "
+ "(%d ft, %d min)",
+ tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
+ tm->tm_hour, tm->tm_min, tm->tm_sec,
+ to_feet(dive->maxdepth), dive->duration.seconds / 60);
+ p = malloc(len+1);
+ if (!p)
+ exit(1);
+ memcpy(p, buffer, len+1);
+ return p;
+}
+
+static void dive_end(void)
+{
+ if (!dive)
+ return;
+ if (!dive->name)
+ dive->name = generate_name(dive);
+ record_dive(dive);
+ dive = NULL;
+}
+
+static void sample_start(void)
+{
+ int nr;
+
+ if (!dive)
+ return;
+ nr = dive->samples;
+ if (nr >= alloc_samples) {
+ unsigned int size;
+
+ alloc_samples = (alloc_samples * 3)/2 + 10;
+ size = dive_size(alloc_samples);
+ dive = realloc(dive, size);
+ if (!dive)
+ return;
+ }
+ sample = dive->sample + nr;
+ memset(sample, 0, sizeof(*sample));
+}
+
+static void sample_end(void)
+{
+ if (!dive)
+ return;
+
+ if (sample->time.seconds > dive->duration.seconds) {
+ if (sample->depth.mm)
+ dive->duration = sample->time;
+ }
+
+ if (sample->depth.mm > dive->maxdepth.mm)
+ dive->maxdepth.mm = sample->depth.mm;
+
+ sample = NULL;
+ dive->samples++;
+}
+
+static void entry(const char *name, int size, const char *raw)
+{
+ char *buf = malloc(size+1);
+
+ if (!buf)
+ return;
+ memcpy(buf, raw, size);
+ buf[size] = 0;
+ if (sample) {
+ try_to_fill_sample(sample, name, buf);
+ return;
+ }
+ if (dive) {
+ try_to_fill_dive(dive, name, buf);
+ return;
+ }
+}
+
+static const char *nodename(xmlNode *node, char *buf, int len)
+{
+ if (!node || !node->name)
+ return "root";
+
+ buf += len;
+ *--buf = 0;
+ len--;
+
+ for(;;) {
+ const char *name = node->name;
+ int i = strlen(name);
+ while (--i >= 0) {
+ unsigned char c = name[i];
+ *--buf = tolower(c);
+ if (!--len)
+ return buf;
+ }
+ node = node->parent;
+ if (!node || !node->name)
+ return buf;
+ *--buf = '.';
+ if (!--len)
+ return buf;
+ }
+}
+
+#define MAXNAME 64
+
+static void visit_one_node(xmlNode *node)
+{
+ int len;
+ const unsigned char *content;
+ char buffer[MAXNAME];
+ const char *name;
+
+ content = node->content;
+ if (!content)
+ return;
+
+ /* Trim whitespace at beginning */
+ while (isspace(*content))
+ content++;
+
+ /* Trim whitespace at end */
+ len = strlen(content);
+ while (len && isspace(content[len-1]))
+ len--;
+
+ if (!len)
+ return;
+
+ /* Don't print out the node name if it is "text" */
+ if (!strcmp(node->name, "text"))
+ node = node->parent;
+
+ name = nodename(node, buffer, sizeof(buffer));
+
+ entry(name, len, content);
+}
+
+static void traverse(xmlNode *node)
+{
+ xmlNode *n;
+
+ for (n = node; n; n = n->next) {
+ /* XML from libdivecomputer: 'dive' per new dive */
+ if (!strcmp(n->name, "dive")) {
+ dive_start();
+ traverse(n->children);
+ dive_end();
+ continue;
+ }
+
+ /*
+ * At least both libdivecomputer and Suunto
+ * agree on "sample".
+ *
+ * Well - almost. Ignore case.
+ */
+ if (!strcasecmp(n->name, "sample")) {
+ sample_start();
+ traverse(n->children);
+ sample_end();
+ continue;
+ }
+
+ /* Anything else - just visit it and recurse */
+ visit_one_node(n);
+ traverse(n->children);
+ }
+}
+
+void parse_xml_file(const char *filename)
+{
+ xmlDoc *doc;
+
+ doc = xmlReadFile(filename, NULL, 0);
+ if (!doc) {
+ fprintf(stderr, "Failed to parse '%s'.\n", filename);
+ return;
+ }
+
+ dive_start();
+ traverse(xmlDocGetRootElement(doc));
+ dive_end();
+ xmlFreeDoc(doc);
+ xmlCleanupParser();
+}
+
+void parse_xml_init(void)
+{
+ LIBXML_TEST_VERSION
+}
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