Upload files to "src/c"

src/c/num2words.c

@@ -0,0 +1,217 @@
+#include "num2words.h"
+
+#include <string.h>
+#include <stdio.h>
+
+static const char* const ONES[] = {
+  "zero",
+  "one",
+  "two",
+  "three",
+  "four",
+  "five",
+  "six",
+  "seven",
+  "eight",
+  "nine"
+};
+
+static const char* const TEENS[] ={
+  "",
+  "eleven",
+  "twelve",
+  "thirteen",
+  "fourteen",
+  "fifteen",
+  "sixteen",
+  "seventeen",
+  "eighteen",
+  "nineteen"
+};
+
+static const char* const TEENS_SPLIT[][2] = {
+  {"", ""},
+  {"eleven",""},
+  {"twelve",""},
+  {"thirteen",""},
+  {"four","teen"},
+  {"fifteen",""},
+  {"sixteen",""},
+  {"seven","teen"},
+  {"eight","teen"},
+  {"nine","teen"}
+};
+
+static const char* const TENS[] = {
+  "",
+  "ten",
+  "twenty",
+  "thirty",
+  "forty",
+  "fifty",
+  "sixty",
+  "seventy",
+  "eighty",
+  "ninety"
+};
+
+static const char* STR_OH_TICK = "o'";
+static const char* STR_O_TICK = "o";
+static const char* STR_CLOCK = "clock";
+static const char* STR_NOON = "noon";
+static const char* STR_MIDNIGHT = "midnight";
+static const char* STR_QUARTER = "quarter";
+static const char* STR_TO = "to";
+static const char* STR_PAST = "past";
+static const char* STR_HALF = "half";
+static const char* STR_AFTER = "after";
+
+static size_t append_number(char* words, int num) {
+  int tens_val = num / 10 % 10;
+  int ones_val = num % 10;
+
+  size_t len = 0;
+
+  if (tens_val > 0) {
+    if (tens_val == 1 && num != 10) {
+      strcat(words, TEENS[ones_val]);
+      return strlen(TEENS[ones_val]);
+    }
+    strcat(words, TENS[tens_val]);
+    len += strlen(TENS[tens_val]);
+    if (ones_val > 0) {
+      strcat(words, " ");
+      len += 1;
+    }
+  }
+
+  if (ones_val > 0 || num == 0) {
+    strcat(words, ONES[ones_val]);
+    len += strlen(ONES[ones_val]);
+  }
+  return len;
+}
+
+void fuzzy_time_to_words(int hours, int minutes, char* words) {
+  int fuzzy_hours = hours;
+  int fuzzy_minutes = ((minutes + 2) / 5) * 5;
+
+  // Handle hour & minute roll-over.
+  if (fuzzy_minutes > 55) {
+    fuzzy_minutes = 0;
+    fuzzy_hours += 1;
+    if (fuzzy_hours > 23) {
+      fuzzy_hours = 0;
+    }
+  }
+
+  time_to_common_words(fuzzy_hours, fuzzy_minutes, words);
+}
+
+// returns number of lines written
+void time_to_common_words(int hours, int minutes, char *words) {
+  // TODO: make an app-safe assert
+  // PBL_ASSERT(hours >= 0 && hours < 24, "Invalid number of hours");
+  // PBL_ASSERT(minutes >= 0 && minutes < 60, "Invalid number of minutes");
+
+  size_t written = 0;
+  strcpy(words, "");
+
+  if (minutes != 0 && (minutes >= 10 || minutes == 5 || hours == 0 || hours == 12)) {
+    if (minutes == 15) {
+      written += sprintf(words, "%s %s ", STR_QUARTER, STR_AFTER);
+    } else if (minutes == 45) {
+      written += sprintf(words, "%s %s ", STR_QUARTER, STR_TO);
+      hours = (hours + 1) % 24;
+    } else if (minutes == 30) {
+      written += sprintf(words, "%s %s ", STR_HALF, STR_PAST);
+    } else if (minutes < 30) {
+      written += append_number(words, minutes);
+      written += sprintf(words + written, " %s ", STR_AFTER);
+    } else {
+      written += append_number(words, 60 - minutes);
+      written += sprintf(words + written, " %s ", STR_TO);
+      hours = (hours + 1) % 24;
+    }
+  }
+
+  if (hours == 0) {
+    written += sprintf(words + written, "%s", STR_MIDNIGHT);
+  } else if (hours == 12) {
+    strcat(words, STR_NOON);
+    written += sprintf(words + written, "%s", STR_NOON);
+  } else {
+    written += append_number(words, hours % 12);
+  }
+
+  if (minutes < 10 && minutes != 5 && !(hours == 0 || hours == 12)) {
+    if (minutes == 0) {
+      sprintf(words + written, " %s%s", STR_OH_TICK, STR_CLOCK);
+    } else {
+      sprintf(words + written, " %s%s", STR_OH_TICK, ONES[minutes]);
+    }
+  }
+}
+
+
+
+// o'clock (0) and plain number words (10..)
+void minute_to_formal_words(int minutes, int displayPrefix, char *first_word, char *second_word) {
+  // PBL_ASSERT(minutes >= 0 && minutes < 60, "Invalid number of minutes");
+
+  strcpy(first_word, "");
+  strcpy(second_word, "");
+
+
+  if (minutes == 0) {
+    strcat(first_word, STR_OH_TICK);
+    strcat(first_word, STR_CLOCK);
+    return;
+  }
+  if (minutes < 10) {
+    if (displayPrefix) {
+      strcat(first_word, STR_O_TICK); //add "o"
+      strcat(second_word, ONES[minutes%10]); //new
+    }
+    else {
+      strcat(first_word, ONES[minutes%10]);
+    }
+    return;
+  }
+  if (minutes > 10 && minutes < 20) {
+    strcat(first_word, TEENS_SPLIT[(minutes - 10) % 10][0]);
+    strcat(second_word, TEENS_SPLIT[(minutes - 10) % 10][1]);
+    return;
+  }
+
+  strcat(first_word, TENS[minutes / 10 % 10]);
+
+  int minute_ones = minutes % 10;
+  if (minute_ones) {
+    strcat(second_word, ONES[minute_ones]);
+  }
+}
+
+void hour_to_12h_word(int hours, char *word) {
+  // PBL_ASSERT(hours >= 0 && hours < 24, "Invalid number of hours");
+  hours = hours % 12;
+
+  if (hours == 0) {
+    hours = 12;
+  }
+
+  strcpy(word, "");
+
+  append_number(word, hours);
+}
+
+
+void hour_to_24h_word(int hours, char *words) {
+  // PBL_ASSERT(hours >= 0 && hours < 24, "Invalid number of hours");
+
+  hours = hours % 24;
+
+  strcpy(words, "");
+
+  append_number(words, hours);
+}