save-xml.c

   1 #include <stdio.h>
   2 #include <ctype.h>
   3 #include <string.h>
   4 #include <stdlib.h>
   5 #include <errno.h>
   6 #include <time.h>
   7
   8 #include "dive.h"
   9
  10 #define FRACTION(n,x) ((unsigned)(n)/(x)),((unsigned)(n)%(x))
  11
  12 static void show_temperature(FILE *f, temperature_t temp, const char *pre, const char *post)
  13 {
  14         if (temp.mkelvin) {
  15                 int mcelsius = temp.mkelvin - 273150;
  16                 const char *sign ="";
  17                 if (mcelsius < 0) {
  18                         sign = "-";
  19                         mcelsius = - mcelsius;
  20                 }
  21                 fprintf(f, "%s%s%u.%03u C%s", pre, sign, FRACTION(mcelsius, 1000), post);
  22         }
  23 }
  24
  25 static void show_depth(FILE *f, depth_t depth, const char *pre, const char *post)
  26 {
  27         if (depth.mm)
  28                 fprintf(f, "%s%u.%03u m%s", pre, FRACTION(depth.mm, 1000), post);
  29 }
  30
  31 static void show_duration(FILE *f, duration_t duration, const char *pre, const char *post)
  32 {
  33         if (duration.seconds)
  34                 fprintf(f, "%s%u:%02u min%s", pre, FRACTION(duration.seconds, 60), post);
  35 }
  36
  37 static void show_pressure(FILE *f, pressure_t pressure, const char *pre, const char *post)
  38 {
  39         if (pressure.mbar)
  40                 fprintf(f, "%s%u.%03u bar%s", pre, FRACTION(pressure.mbar, 1000), post);
  41 }
  42
  43 /*
  44  * We're outputting utf8 in xml.
  45  * We need to quote the characters <, >, &.
  46  *
  47  * Nothing else (and if we ever do this using attributes, we'd need to
  48  * quote the quotes we use too).
  49  */
  50 static void quote(FILE *f, const char *text)
  51 {
  52         const char *p = text;
  53
  54         for (;;) {
  55                 const char *escape;
  56
  57                 switch (*p++) {
  58                 default:
  59                         continue;
  60                 case 0:
  61                         escape = NULL;
  62                         break;
  63                 case '<':
  64                         escape = "&lt;";
  65                         break;
  66                 case '>':
  67                         escape = "&gt;";
  68                         break;
  69                 case '&':
  70                         escape = "&amp;";
  71                         break;
  72                 }
  73                 fwrite(text, (p - text - 1), 1, f);
  74                 if (!escape)
  75                         break;
  76                 fputs(escape, f);
  77                 text = p;
  78         }
  79 }
  80
  81 static void show_utf8(FILE *f, const char *text, const char *pre, const char *post)
  82 {
  83         int len;
  84
  85         if (!text)
  86                 return;
  87         while (isspace(*text))
  88                 text++;
  89         len = strlen(text);
  90         if (!len)
  91                 return;
  92         while (len && isspace(text[len-1]))
  93                 len--;
  94         /* FIXME! Quoting! */
  95         fputs(pre, f);
  96         quote(f, text);
  97         fputs(post, f);
  98 }
  99
 100 static void save_overview(FILE *f, struct dive *dive)
 101 {
 102         show_depth(f, dive->maxdepth, "  <maxdepth>", "</maxdepth>\n");
 103         show_depth(f, dive->meandepth, "  <meandepth>", "</meandepth>\n");
 104         show_temperature(f, dive->airtemp, "  <airtemp>", "</airtemp>\n");
 105         show_temperature(f, dive->watertemp, "  <watertemp>", "</airtemp>\n");
 106         show_duration(f, dive->duration, "  <duration>", "</duration>\n");
 107         show_duration(f, dive->surfacetime, "  <surfacetime>", "</surfacetime>\n");
 108         show_pressure(f, dive->beginning_pressure, "  <cylinderstartpressure>", "</cylinderstartpressure>\n");
 109         show_pressure(f, dive->end_pressure, "  <cylinderendpressure>", "</cylinderendpressure>\n");
 110         show_utf8(f, dive->location, "  <location>","</location>\n");
 111         show_utf8(f, dive->notes, "  <notes>","</notes>\n");
 112 }
 113
 114 static void save_gasmix(FILE *f, struct dive *dive)
 115 {
 116         int i;
 117
 118         for (i = 0; i < MAX_MIXES; i++) {
 119                 gasmix_t *mix = dive->gasmix+i;
 120                 int o2 = mix->o2.permille, he = mix->he.permille;
 121                 int n2 = 1000 - o2 - he;
 122
 123                 if (!mix->o2.permille)
 124                         return;
 125                 fprintf(f, "  <gasmix o2='%u.%u%%'", FRACTION(o2, 10));
 126                 if (mix->he.permille)
 127                         fprintf(f, " he='%u.%u%%'", FRACTION(he, 10));
 128                 fprintf(f, " n2='%u.%u%%' />\n", FRACTION(n2, 10));
 129         }
 130 }
 131
 132 static void save_sample(FILE *f, struct sample *sample)
 133 {
 134         fprintf(f, "  <sample time='%u:%02u min' depth='%u.%03u m'",
 135                 FRACTION(sample->time.seconds,60),
 136                 FRACTION(sample->depth.mm, 1000));
 137         show_temperature(f, sample->temperature, " temp='", "'");
 138         show_pressure(f, sample->tankpressure, " pressure='", "'");
 139         if (sample->tankindex)
 140                 fprintf(f, " tankindex='%d'", sample->tankindex);
 141         fprintf(f, " />\n");
 142 }
 143
 144 static void save_dive(FILE *f, struct dive *dive)
 145 {
 146         int i;
 147         struct tm *tm = gmtime(&dive->when);
 148
 149         fprintf(f, "<dive date='%04u-%02u-%02u' time='%02u:%02u:%02u'>\n",
 150                 tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
 151                 tm->tm_hour, tm->tm_min, tm->tm_sec);
 152         save_overview(f, dive);
 153         save_gasmix(f, dive);
 154         for (i = 0; i < dive->samples; i++)
 155                 save_sample(f, dive->sample+i);
 156         fprintf(f, "</dive>\n");
 157 }
 158
 159 #define VERSION 1
 160
 161 void save_dives(const char *filename)
 162 {
 163         int i;
 164         FILE *f = fopen(filename, "w");
 165
 166         if (!f)
 167                 return;
 168
 169         /* Flush any edits of current dives back to the dives! */
 170         flush_dive_info_changes();
 171
 172         fprintf(f, "<dives>\n<program name='diveclog' version='%d'></program>\n", VERSION);
 173         for (i = 0; i < dive_table.nr; i++)
 174                 save_dive(f, get_dive(i));
 175         fprintf(f, "</dives>\n");
 176 }