src/web_buffer_svg.c

   1 #include "common.h"
   2
   3 #define BADGE_HORIZONTAL_PADDING 4
   4 #define VERDANA_KERNING 0.2
   5 #define VERDANA_PADDING 1.0
   6
   7 /*
   8  * verdana11_widths[] has been generated with this method:
   9  * https://github.com/badges/shields/blob/master/measure-text.js
  10 */
  11
  12 double verdana11_widths[256] = {
  13     [0] = 0.0,
  14     [1] = 0.0,
  15     [2] = 0.0,
  16     [3] = 0.0,
  17     [4] = 0.0,
  18     [5] = 0.0,
  19     [6] = 0.0,
  20     [7] = 0.0,
  21     [8] = 0.0,
  22     [9] = 0.0,
  23     [10] = 0.0,
  24     [11] = 0.0,
  25     [12] = 0.0,
  26     [13] = 0.0,
  27     [14] = 0.0,
  28     [15] = 0.0,
  29     [16] = 0.0,
  30     [17] = 0.0,
  31     [18] = 0.0,
  32     [19] = 0.0,
  33     [20] = 0.0,
  34     [21] = 0.0,
  35     [22] = 0.0,
  36     [23] = 0.0,
  37     [24] = 0.0,
  38     [25] = 0.0,
  39     [26] = 0.0,
  40     [27] = 0.0,
  41     [28] = 0.0,
  42     [29] = 0.0,
  43     [30] = 0.0,
  44     [31] = 0.0,
  45     [32] = 3.8671874999999996, //
  46     [33] = 4.3291015625, // !
  47     [34] = 5.048828125, // "
  48     [35] = 9.001953125, // #
  49     [36] = 6.9931640625, // $
  50     [37] = 11.837890625, // %
  51     [38] = 7.992187499999999, // &
  52     [39] = 2.9541015625, // '
  53     [40] = 4.9951171875, // (
  54     [41] = 4.9951171875, // )
  55     [42] = 6.9931640625, // *
  56     [43] = 9.001953125, // +
  57     [44] = 4.00146484375, // ,
  58     [45] = 4.9951171875, // -
  59     [46] = 4.00146484375, // .
  60     [47] = 4.9951171875, // /
  61     [48] = 6.9931640625, // 0
  62     [49] = 6.9931640625, // 1
  63     [50] = 6.9931640625, // 2
  64     [51] = 6.9931640625, // 3
  65     [52] = 6.9931640625, // 4
  66     [53] = 6.9931640625, // 5
  67     [54] = 6.9931640625, // 6
  68     [55] = 6.9931640625, // 7
  69     [56] = 6.9931640625, // 8
  70     [57] = 6.9931640625, // 9
  71     [58] = 4.9951171875, // :
  72     [59] = 4.9951171875, // ;
  73     [60] = 9.001953125, // <
  74     [61] = 9.001953125, // =
  75     [62] = 9.001953125, // >
  76     [63] = 5.99951171875, // ?
  77     [64] = 11.0, // @
  78     [65] = 7.51953125, // A
  79     [66] = 7.541015625, // B
  80     [67] = 7.680664062499999, // C
  81     [68] = 8.4755859375, // D
  82     [69] = 6.95556640625, // E
  83     [70] = 6.32177734375, // F
  84     [71] = 8.529296875, // G
  85     [72] = 8.26611328125, // H
  86     [73] = 4.6298828125, // I
  87     [74] = 5.00048828125, // J
  88     [75] = 7.62158203125, // K
  89     [76] = 6.123046875, // L
  90     [77] = 9.2705078125, // M
  91     [78] = 8.228515625, // N
  92     [79] = 8.658203125, // O
  93     [80] = 6.63330078125, // P
  94     [81] = 8.658203125, // Q
  95     [82] = 7.6484375, // R
  96     [83] = 7.51953125, // S
  97     [84] = 6.7783203125, // T
  98     [85] = 8.05126953125, // U
  99     [86] = 7.51953125, // V
 100     [87] = 10.87646484375, // W
 101     [88] = 7.53564453125, // X
 102     [89] = 6.767578125, // Y
 103     [90] = 7.53564453125, // Z
 104     [91] = 4.9951171875, // [
 105     [92] = 4.9951171875, // backslash
 106     [93] = 4.9951171875, // ]
 107     [94] = 9.001953125, // ^
 108     [95] = 6.9931640625, // _
 109     [96] = 6.9931640625, // `
 110     [97] = 6.6064453125, // a
 111     [98] = 6.853515625, // b
 112     [99] = 5.73095703125, // c
 113     [100] = 6.853515625, // d
 114     [101] = 6.552734375, // e
 115     [102] = 3.8671874999999996, // f
 116     [103] = 6.853515625, // g
 117     [104] = 6.9609375, // h
 118     [105] = 3.0185546875, // i
 119     [106] = 3.78662109375, // j
 120     [107] = 6.509765625, // k
 121     [108] = 3.0185546875, // l
 122     [109] = 10.69921875, // m
 123     [110] = 6.9609375, // n
 124     [111] = 6.67626953125, // o
 125     [112] = 6.853515625, // p
 126     [113] = 6.853515625, // q
 127     [114] = 4.6943359375, // r
 128     [115] = 5.73095703125, // s
 129     [116] = 4.33447265625, // t
 130     [117] = 6.9609375, // u
 131     [118] = 6.509765625, // v
 132     [119] = 9.001953125, // w
 133     [120] = 6.509765625, // x
 134     [121] = 6.509765625, // y
 135     [122] = 5.779296875, // z
 136     [123] = 6.982421875, // {
 137     [124] = 4.9951171875, // |
 138     [125] = 6.982421875, // }
 139     [126] = 9.001953125, // ~
 140     [127] = 0.0,
 141     [128] = 0.0,
 142     [129] = 0.0,
 143     [130] = 0.0,
 144     [131] = 0.0,
 145     [132] = 0.0,
 146     [133] = 0.0,
 147     [134] = 0.0,
 148     [135] = 0.0,
 149     [136] = 0.0,
 150     [137] = 0.0,
 151     [138] = 0.0,
 152     [139] = 0.0,
 153     [140] = 0.0,
 154     [141] = 0.0,
 155     [142] = 0.0,
 156     [143] = 0.0,
 157     [144] = 0.0,
 158     [145] = 0.0,
 159     [146] = 0.0,
 160     [147] = 0.0,
 161     [148] = 0.0,
 162     [149] = 0.0,
 163     [150] = 0.0,
 164     [151] = 0.0,
 165     [152] = 0.0,
 166     [153] = 0.0,
 167     [154] = 0.0,
 168     [155] = 0.0,
 169     [156] = 0.0,
 170     [157] = 0.0,
 171     [158] = 0.0,
 172     [159] = 0.0,
 173     [160] = 0.0,
 174     [161] = 0.0,
 175     [162] = 0.0,
 176     [163] = 0.0,
 177     [164] = 0.0,
 178     [165] = 0.0,
 179     [166] = 0.0,
 180     [167] = 0.0,
 181     [168] = 0.0,
 182     [169] = 0.0,
 183     [170] = 0.0,
 184     [171] = 0.0,
 185     [172] = 0.0,
 186     [173] = 0.0,
 187     [174] = 0.0,
 188     [175] = 0.0,
 189     [176] = 0.0,
 190     [177] = 0.0,
 191     [178] = 0.0,
 192     [179] = 0.0,
 193     [180] = 0.0,
 194     [181] = 0.0,
 195     [182] = 0.0,
 196     [183] = 0.0,
 197     [184] = 0.0,
 198     [185] = 0.0,
 199     [186] = 0.0,
 200     [187] = 0.0,
 201     [188] = 0.0,
 202     [189] = 0.0,
 203     [190] = 0.0,
 204     [191] = 0.0,
 205     [192] = 0.0,
 206     [193] = 0.0,
 207     [194] = 0.0,
 208     [195] = 0.0,
 209     [196] = 0.0,
 210     [197] = 0.0,
 211     [198] = 0.0,
 212     [199] = 0.0,
 213     [200] = 0.0,
 214     [201] = 0.0,
 215     [202] = 0.0,
 216     [203] = 0.0,
 217     [204] = 0.0,
 218     [205] = 0.0,
 219     [206] = 0.0,
 220     [207] = 0.0,
 221     [208] = 0.0,
 222     [209] = 0.0,
 223     [210] = 0.0,
 224     [211] = 0.0,
 225     [212] = 0.0,
 226     [213] = 0.0,
 227     [214] = 0.0,
 228     [215] = 0.0,
 229     [216] = 0.0,
 230     [217] = 0.0,
 231     [218] = 0.0,
 232     [219] = 0.0,
 233     [220] = 0.0,
 234     [221] = 0.0,
 235     [222] = 0.0,
 236     [223] = 0.0,
 237     [224] = 0.0,
 238     [225] = 0.0,
 239     [226] = 0.0,
 240     [227] = 0.0,
 241     [228] = 0.0,
 242     [229] = 0.0,
 243     [230] = 0.0,
 244     [231] = 0.0,
 245     [232] = 0.0,
 246     [233] = 0.0,
 247     [234] = 0.0,
 248     [235] = 0.0,
 249     [236] = 0.0,
 250     [237] = 0.0,
 251     [238] = 0.0,
 252     [239] = 0.0,
 253     [240] = 0.0,
 254     [241] = 0.0,
 255     [242] = 0.0,
 256     [243] = 0.0,
 257     [244] = 0.0,
 258     [245] = 0.0,
 259     [246] = 0.0,
 260     [247] = 0.0,
 261     [248] = 0.0,
 262     [249] = 0.0,
 263     [250] = 0.0,
 264     [251] = 0.0,
 265     [252] = 0.0,
 266     [253] = 0.0,
 267     [254] = 0.0,
 268     [255] = 0.0
 269 };
 270
 271 // find the width of the string using the verdana 11points font
 272 // re-write the string in place, skiping zero-length characters
 273 static inline int verdana11_width(char *s) {
 274     double w = 0.0;
 275     char *d = s;
 276
 277     while(*s) {
 278         double t = verdana11_widths[(unsigned char)*s];
 279         if(t == 0.0)
 280             s++;
 281         else {
 282             w += t + VERDANA_KERNING;
 283             if(d != s)
 284                 *d++ = *s++;
 285             else
 286                 d = ++s;
 287         }
 288     }
 289
 290     *d = '\0';
 291     w -= VERDANA_KERNING;
 292     w += VERDANA_PADDING;
 293     return (int)ceil(w);
 294 }
 295
 296 static inline size_t escape_xmlz(char *dst, const char *src, size_t len) {
 297     size_t i = len;
 298
 299     // required escapes from
 300     // https://github.com/badges/shields/blob/master/badge.js
 301     while(*src && i) {
 302         switch(*src) {
 303             case '\\':
 304                 *dst++ = '/';
 305                 src++;
 306                 i--;
 307                 break;
 308
 309             case '&':
 310                 if(i > 5) {
 311                     strcpy(dst, "&amp;");
 312                     i -= 5;
 313                     dst += 5;
 314                     src++;
 315                 }
 316                 else goto cleanup;
 317                 break;
 318
 319             case '<':
 320                 if(i > 4) {
 321                     strcpy(dst, "&lt;");
 322                     i -= 4;
 323                     dst += 4;
 324                     src++;
 325                 }
 326                 else goto cleanup;
 327                 break;
 328
 329             case '>':
 330                 if(i > 4) {
 331                     strcpy(dst, "&gt;");
 332                     i -= 4;
 333                     dst += 4;
 334                     src++;
 335                 }
 336                 else goto cleanup;
 337                 break;
 338
 339             case '"':
 340                 if(i > 6) {
 341                     strcpy(dst, "&quot;");
 342                     i -= 6;
 343                     dst += 6;
 344                     src++;
 345                 }
 346                 else goto cleanup;
 347                 break;
 348
 349             case '\'':
 350                 if(i > 6) {
 351                     strcpy(dst, "&apos;");
 352                     i -= 6;
 353                     dst += 6;
 354                     src++;
 355                 }
 356                 else goto cleanup;
 357                 break;
 358
 359             default:
 360                 i--;
 361                 *dst++ = *src++;
 362                 break;
 363         }
 364     }
 365
 366 cleanup:
 367     *dst = '\0';
 368     return len - i;
 369 }
 370
 371 static inline int fix_value_and_units(char *value_string, size_t value_string_len, calculated_number value, const char **units_ptr, int value_is_null) {
 372     static uint32_t
 373             hash_seconds = 0,
 374             hash_seconds_ago = 0,
 375             hash_minutes = 0,
 376             hash_minutes_ago = 0,
 377             hash_hours = 0,
 378             hash_hours_ago = 0,
 379             hash_onoff = 0,
 380             hash_updown = 0,
 381             hash_okerror = 0,
 382             hash_okfailed = 0,
 383             hash_empty = 0,
 384             hash_null = 0,
 385             hash_percentage = 0,
 386             hash_percent = 0,
 387             hash_pcent = 0;
 388
 389     if(unlikely(!hash_seconds)) {
 390         hash_seconds     = simple_hash("seconds");
 391         hash_seconds_ago = simple_hash("seconds ago");
 392         hash_minutes     = simple_hash("minutes");
 393         hash_minutes_ago = simple_hash("minutes ago");
 394         hash_hours       = simple_hash("hours");
 395         hash_hours_ago   = simple_hash("hours ago");
 396         hash_onoff       = simple_hash("on/off");
 397         hash_updown      = simple_hash("up/down");
 398         hash_okerror     = simple_hash("ok/error");
 399         hash_okfailed    = simple_hash("ok/failed");
 400         hash_empty       = simple_hash("empty");
 401         hash_null        = simple_hash("null");
 402         hash_percentage  = simple_hash("percentage");
 403         hash_percent     = simple_hash("percent");
 404         hash_pcent       = simple_hash("pcent");
 405     }
 406
 407     const char *units = (units_ptr)?*units_ptr:NULL;
 408     if(unlikely(!units)) units = "";
 409
 410     uint32_t hash_units = simple_hash(units);
 411
 412     if(unlikely((hash_units == hash_seconds && !strcmp(units, "seconds")) || (hash_units == hash_seconds_ago && !strcmp(units, "seconds ago")))) {
 413         if(value == 0.0) {
 414             snprintfz(value_string, value_string_len, "%s", "now");
 415             units = "";
 416             goto finish;
 417         }
 418         else if(isnan(value) || isinf(value)) {
 419             snprintfz(value_string, value_string_len, "%s", "never");
 420             units = "";
 421             goto finish;
 422         }
 423
 424         const char *suffix = (hash_units == hash_seconds_ago)?" ago":"";
 425
 426         size_t s = (size_t)value;
 427         size_t d = s / 86400;
 428         s = s % 86400;
 429
 430         size_t h = s / 3600;
 431         s = s % 3600;
 432
 433         size_t m = s / 60;
 434         s = s % 60;
 435
 436         if(d)
 437             snprintfz(value_string, value_string_len, "%zu %s %02zu:%02zu:%02zu%s", d, (d == 1)?"day":"days", h, m, s, suffix);
 438         else
 439             snprintfz(value_string, value_string_len, "%02zu:%02zu:%02zu%s", h, m, s, suffix);
 440
 441         units = "";
 442     }
 443
 444     else if(unlikely((hash_units == hash_minutes && !strcmp(units, "minutes")) || (hash_units == hash_minutes_ago && !strcmp(units, "minutes ago")))) {
 445         if(value == 0.0) {
 446             snprintfz(value_string, value_string_len, "%s", "now");
 447             units = "";
 448             goto finish;
 449         }
 450         else if(isnan(value) || isinf(value)) {
 451             snprintfz(value_string, value_string_len, "%s", "never");
 452             units = "";
 453             goto finish;
 454         }
 455
 456         const char *suffix = (hash_units == hash_minutes_ago)?" ago":"";
 457
 458         size_t m = (size_t)value;
 459         size_t d = m / (60 * 24);
 460         m = m % (60 * 24);
 461
 462         size_t h = m / 60;
 463         m = m % 60;
 464
 465         if(d)
 466             snprintfz(value_string, value_string_len, "%zud %02zuh %02zum%s", d, h, m, suffix);
 467         else
 468             snprintfz(value_string, value_string_len, "%zuh %zum%s", h, m, suffix);
 469
 470         units = "";
 471     }
 472
 473     else if(unlikely((hash_units == hash_hours && !strcmp(units, "hours")) || (hash_units == hash_hours_ago && !strcmp(units, "hours ago")))) {
 474         if(value == 0.0) {
 475             snprintfz(value_string, value_string_len, "%s", "now");
 476             units = "";
 477             goto finish;
 478         }
 479         else if(isnan(value) || isinf(value)) {
 480             snprintfz(value_string, value_string_len, "%s", "never");
 481             units = "";
 482             goto finish;
 483         }
 484
 485         const char *suffix = (hash_units == hash_hours_ago)?" ago":"";
 486
 487         size_t h = (size_t)value;
 488         size_t d = h / 24;
 489         h = h % 24;
 490
 491         if(d)
 492             snprintfz(value_string, value_string_len, "%zud %zuh%s", d, h, suffix);
 493         else
 494             snprintfz(value_string, value_string_len, "%zuh%s", h, suffix);
 495
 496         units = "";
 497     }
 498
 499     else if(unlikely(hash_units == hash_onoff && !strcmp(units, "on/off"))) {
 500         snprintfz(value_string, value_string_len, "%s", (value != 0.0)?"on":"off");
 501         units = "";
 502     }
 503
 504     else if(unlikely(hash_units == hash_updown && !strcmp(units, "up/down"))) {
 505         snprintfz(value_string, value_string_len, "%s", (value != 0.0)?"up":"down");
 506         units = "";
 507     }
 508
 509     else if(unlikely(hash_units == hash_okerror && !strcmp(units, "ok/error"))) {
 510         snprintfz(value_string, value_string_len, "%s", (value != 0.0)?"ok":"error");
 511         units = "";
 512     }
 513
 514     else if(unlikely(hash_units == hash_okfailed && !strcmp(units, "ok/failed"))) {
 515         snprintfz(value_string, value_string_len, "%s", (value != 0.0)?"ok":"failed");
 516         units = "";
 517     }
 518
 519     else if(unlikely(hash_units == hash_empty && !strcmp(units, "empty")))
 520         units = "";
 521
 522     else if(unlikely(hash_units == hash_null && !strcmp(units, "null")))
 523         units = "";
 524
 525     else if(unlikely(hash_units == hash_percentage && !strcmp(units, "percentage")))
 526         units = "%";
 527
 528     else if(unlikely(hash_units == hash_percent && !strcmp(units, "percent")))
 529         units = "%";
 530
 531     else if(unlikely(hash_units == hash_pcent && !strcmp(units, "pcent")))
 532         units = "%";
 533
 534     else if(unlikely(value_is_null)) {
 535         strcpy(value_string, "-");
 536         units = "";
 537     }
 538     else
 539         return 0;
 540
 541 finish:
 542     if(units_ptr) *units_ptr = units;
 543     return 1;
 544 }
 545
 546 static inline const char *color_map(const char *color) {
 547     // colors from:
 548     // https://github.com/badges/shields/blob/master/colorscheme.json
 549          if(!strcmp(color, "brightgreen")) return "#4c1";
 550     else if(!strcmp(color, "green"))       return "#97CA00";
 551     else if(!strcmp(color, "yellow"))      return "#dfb317";
 552     else if(!strcmp(color, "yellowgreen")) return "#a4a61d";
 553     else if(!strcmp(color, "orange"))      return "#fe7d37";
 554     else if(!strcmp(color, "red"))         return "#e05d44";
 555     else if(!strcmp(color, "blue"))        return "#007ec6";
 556     else if(!strcmp(color, "grey"))        return "#555";
 557     else if(!strcmp(color, "gray"))        return "#555";
 558     else if(!strcmp(color, "lightgrey"))   return "#9f9f9f";
 559     else if(!strcmp(color, "lightgray"))   return "#9f9f9f";
 560     return color;
 561 }
 562
 563 static inline void calc_colorz(const char *color, char *final, size_t len, calculated_number value, int value_is_null) {
 564     if(isnan(value) || isinf(value))
 565         value = 0.0;
 566
 567     char color_buffer[256 + 1] = "";
 568     char value_buffer[256 + 1] = "";
 569     char comparison = '>';
 570
 571     // example input:
 572     // color<max|color>min|color:null...
 573
 574     const char *c = color;
 575     while(*c) {
 576         char *dc = color_buffer, *dv = NULL;
 577         size_t ci = 0, vi = 0;
 578
 579         const char *t = c;
 580
 581         while(*t && *t != '|') {
 582             switch(*t) {
 583                 case ':':
 584                     comparison = '=';
 585                     dv = value_buffer;
 586                     break;
 587
 588                 case '}':
 589                 case ')':
 590                 case '>':
 591                     if(t[1] == '=') {
 592                         comparison = ')';
 593                         t++;
 594                     }
 595                     else
 596                         comparison = '>';
 597                     dv = value_buffer;
 598                     break;
 599
 600                 case '{':
 601                 case '(':
 602                 case '<':
 603                     if(t[1] == '=') {
 604                         comparison = '(';
 605                         t++;
 606                     }
 607                     else
 608                         comparison = '<';
 609                     dv = value_buffer;
 610                     break;
 611
 612                 default:
 613                     if(dv) {
 614                         if(vi < 256) {
 615                             vi++;
 616                             *dv++ = *t;
 617                         }
 618                     }
 619                     else {
 620                         if(ci < 256) {
 621                             ci++;
 622                             *dc++ = *t;
 623                         }
 624                     }
 625                     break;
 626             }
 627
 628             t++;
 629         }
 630
 631         // prepare for next iteration
 632         if(*t == '|') t++;
 633         c = t;
 634
 635         // do the math
 636         *dc = '\0';
 637         if(dv) {
 638             *dv = '\0';
 639
 640             if(value_is_null) {
 641                 if(!*value_buffer || !strcmp(value_buffer, "null"))
 642                     break;
 643             }
 644             else {
 645                 calculated_number v = str2l(value_buffer);
 646
 647                      if(comparison == '<' && value < v) break;
 648                 else if(comparison == '(' && value <= v) break;
 649                 else if(comparison == '>' && value > v) break;
 650                 else if(comparison == ')' && value >= v) break;
 651                 else if(comparison == '=' && value == v) break;
 652             }
 653         }
 654         else
 655             break;
 656     }
 657
 658     const char *b;
 659     if(color_buffer[0])
 660         b = color_buffer;
 661     else
 662         b = color;
 663
 664     strncpyz(final, b, len);
 665 }
 666
 667 // value + units
 668 #define VALUE_STRING_SIZE 100
 669
 670 // label
 671 #define LABEL_STRING_SIZE 200
 672
 673 // colors
 674 #define COLOR_STRING_SIZE 100
 675
 676 void buffer_svg(BUFFER *wb, const char *label, calculated_number value, const char *units, const char *label_color, const char *value_color, int value_is_null, int precision) {
 677     char      label_buffer[LABEL_STRING_SIZE + 1]
 678             , value_color_buffer[COLOR_STRING_SIZE + 1]
 679             , value_string[VALUE_STRING_SIZE + 1]
 680             , label_escaped[LABEL_STRING_SIZE + 1]
 681             , value_escaped[VALUE_STRING_SIZE + 1]
 682             , label_color_escaped[COLOR_STRING_SIZE + 1]
 683             , value_color_escaped[COLOR_STRING_SIZE + 1];
 684
 685     int label_width, value_width, total_width;
 686
 687     if(unlikely(!label_color || !*label_color))
 688         label_color = "#555";
 689
 690     if(unlikely(!value_color || !*value_color))
 691         value_color = (value_is_null)?"#999":"#4c1";
 692
 693     calc_colorz(value_color, value_color_buffer, COLOR_STRING_SIZE, value, value_is_null);
 694
 695     if(!fix_value_and_units(value_string, VALUE_STRING_SIZE, value, &units, value_is_null)) {
 696         // we have to print the value
 697
 698         if(isnan(value) || isinf(value))
 699             value = 0.0;
 700
 701         char *separator = "";
 702         if(unlikely(isalnum(*units)))
 703             separator = " ";
 704
 705         if(precision < 0) {
 706             int len, lstop = 0, trim_zeros = 1;
 707
 708             calculated_number abs = value;
 709             if(isless(value, 0)) {
 710                 lstop = 1;
 711                 abs = -value;
 712             }
 713
 714             if(isgreaterequal(abs, 1000)) {
 715                 len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.0Lf", (long double) value);
 716                 trim_zeros = 0;
 717             }
 718             else if(isgreaterequal(abs, 100)) len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.1Lf", (long double) value);
 719             else if(isgreaterequal(abs, 1))   len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.2Lf", (long double) value);
 720             else if(isgreaterequal(abs, 0.1)) len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.3Lf", (long double) value);
 721             else                              len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.4Lf", (long double) value);
 722
 723             if(unlikely(trim_zeros)) {
 724                 int l;
 725                 // remove trailing zeros from the decimal part
 726                 for(l = len - 1; l > lstop; l--) {
 727                     if(likely(value_string[l] == '0')) {
 728                         value_string[l] = '\0';
 729                         len--;
 730                     }
 731
 732                     else if(unlikely(value_string[l] == '.')) {
 733                         value_string[l] = '\0';
 734                         len--;
 735                         break;
 736                     }
 737
 738                     else
 739                         break;
 740                 }
 741             }
 742
 743             if(len >= 0)
 744                 snprintfz(&value_string[len], VALUE_STRING_SIZE - len, "%s%s", separator, units);
 745         }
 746         else {
 747             if(precision > 50) precision = 50;
 748             snprintfz(value_string, VALUE_STRING_SIZE, "%0.*Lf%s%s", precision, (long double) value, separator, units);
 749         }
 750     }
 751
 752     // we need to copy the label, since verdana11_width may write to it
 753     strncpyz(label_buffer, label, LABEL_STRING_SIZE);
 754
 755     label_width = verdana11_width(label_buffer) + (BADGE_HORIZONTAL_PADDING * 2);
 756     value_width = verdana11_width(value_string) + (BADGE_HORIZONTAL_PADDING * 2);
 757     total_width = label_width + value_width;
 758
 759     escape_xmlz(label_escaped, label_buffer, LABEL_STRING_SIZE);
 760     escape_xmlz(value_escaped, value_string, VALUE_STRING_SIZE);
 761     escape_xmlz(label_color_escaped, color_map(label_color), COLOR_STRING_SIZE);
 762     escape_xmlz(value_color_escaped, color_map(value_color_buffer), COLOR_STRING_SIZE);
 763
 764     wb->contenttype = CT_IMAGE_SVG_XML;
 765
 766     // svg template from:
 767     // https://raw.githubusercontent.com/badges/shields/master/templates/flat-template.svg
 768     buffer_sprintf(wb,
 769         "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"%d\" height=\"20\">"
 770             "<linearGradient id=\"smooth\" x2=\"0\" y2=\"100%%\">"
 771                 "<stop offset=\"0\" stop-color=\"#bbb\" stop-opacity=\".1\"/>"
 772                 "<stop offset=\"1\" stop-opacity=\".1\"/>"
 773             "</linearGradient>"
 774             "<mask id=\"round\">"
 775                 "<rect width=\"%d\" height=\"20\" rx=\"3\" fill=\"#fff\"/>"
 776             "</mask>"
 777             "<g mask=\"url(#round)\">"
 778                 "<rect width=\"%d\" height=\"20\" fill=\"%s\"/>"
 779                 "<rect x=\"%d\" width=\"%d\" height=\"20\" fill=\"%s\"/>"
 780                 "<rect width=\"%d\" height=\"20\" fill=\"url(#smooth)\"/>"
 781             "</g>"
 782             "<g fill=\"#fff\" text-anchor=\"middle\" font-family=\"DejaVu Sans,Verdana,Geneva,sans-serif\" font-size=\"11\">"
 783                 "<text x=\"%d\" y=\"15\" fill=\"#010101\" fill-opacity=\".3\">%s</text>"
 784                 "<text x=\"%d\" y=\"14\">%s</text>"
 785                 "<text x=\"%d\" y=\"15\" fill=\"#010101\" fill-opacity=\".3\">%s</text>"
 786                 "<text x=\"%d\" y=\"14\">%s</text>"
 787             "</g>"
 788         "</svg>",
 789         total_width, total_width,
 790         label_width, label_color_escaped,
 791         label_width, value_width, value_color_escaped,
 792         total_width,
 793         label_width / 2, label_escaped,
 794         label_width / 2, label_escaped,
 795         label_width + value_width / 2 -1, value_escaped,
 796         label_width + value_width / 2 -1, value_escaped);
 797 }