X-Git-Url: http://git.nikiroo.be/?a=blobdiff_plain;f=src%2Fbe%2Fnikiroo%2Futils%2FStringUtils.java;h=954d34113d09650c4b33d5ccd1dbb70f51ed32a1;hb=39d16a807a9327ec2106dbf26ab054dcd5f10ada;hp=ef3d84b921aea488f5ce17e5b8b52334cf24a375;hpb=b6200792e591f13c2d8ecedc4d2015db8ff76cbe;p=nikiroo-utils.git

diff --git a/src/be/nikiroo/utils/StringUtils.java b/src/be/nikiroo/utils/StringUtils.java
index ef3d84b..954d341 100644
--- a/src/be/nikiroo/utils/StringUtils.java
+++ b/src/be/nikiroo/utils/StringUtils.java
@@ -795,6 +795,156 @@ public class StringUtils {
 		return new String(unbase64(data, offset, count, zip), "UTF-8");
 	}
 
+	/**
+	 * Return a display {@link String} for the given value, which can be
+	 * suffixed with "k" or "M" depending upon the number, if it is big enough.
+	 * <p>
+	 * <p>
+	 * Examples:
+	 * <ul>
+	 * <li><tt>8 765</tt> becomes "8k"</li>
+	 * <li><tt>998 765</tt> becomes "998k"</li>
+	 * <li><tt>12 987 364</tt> becomes "12M"</li>
+	 * <li><tt>5 534 333 221</tt> becomes "5G"</li>
+	 * </ul>
+	 * 
+	 * @param value
+	 *            the value to convert
+	 * 
+	 * @return the display value
+	 */
+	public static String formatNumber(long value) {
+		return formatNumber(value, 0);
+	}
+
+	/**
+	 * Return a display {@link String} for the given value, which can be
+	 * suffixed with "k" or "M" depending upon the number, if it is big enough.
+	 * <p>
+	 * Examples (assuming decimalPositions = 1):
+	 * <ul>
+	 * <li><tt>8 765</tt> becomes "8.7k"</li>
+	 * <li><tt>998 765</tt> becomes "998.7k"</li>
+	 * <li><tt>12 987 364</tt> becomes "12.9M"</li>
+	 * <li><tt>5 534 333 221</tt> becomes "5.5G"</li>
+	 * </ul>
+	 * 
+	 * @param value
+	 *            the value to convert
+	 * @param decimalPositions
+	 *            the number of decimal positions to keep
+	 * 
+	 * @return the display value
+	 */
+	public static String formatNumber(long value, int decimalPositions) {
+		long userValue = value;
+		String suffix = "";
+		long mult = 1;
+
+		if (value >= 1000000000l) {
+			mult = 1000000000l;
+			userValue = value / 1000000000l;
+			suffix = " G";
+		} else if (value >= 1000000l) {
+			mult = 1000000l;
+			userValue = value / 1000000l;
+			suffix = " M";
+		} else if (value >= 1000l) {
+			mult = 1000l;
+			userValue = value / 1000l;
+			suffix = " k";
+		}
+
+		String deci = "";
+		if (decimalPositions > 0) {
+			deci = Long.toString(value % mult);
+			int size = Long.toString(mult).length() - 1;
+			while (deci.length() < size) {
+				deci = "0" + deci;
+			}
+
+			deci = deci.substring(0, Math.min(decimalPositions, deci.length()));
+			while (deci.length() < decimalPositions) {
+				deci += "0";
+			}
+
+			deci = "." + deci;
+		}
+
+		return Long.toString(userValue) + deci + suffix;
+	}
+
+	/**
+	 * The reverse operation to {@link StringUtils#formatNumber(long)}: it will
+	 * read a "display" number that can contain a "M" or "k" suffix and return
+	 * the full value.
+	 * <p>
+	 * Of course, the conversion to and from display form is lossy (example:
+	 * <tt>6870</tt> to "6.5k" to <tt>6500</tt>).
+	 * 
+	 * @param value
+	 *            the value in display form with possible "M" and "k" suffixes,
+	 *            can be NULL
+	 * 
+	 * @return the value as a number, or 0 if not possible to convert
+	 */
+	public static long toNumber(String value) {
+		return toNumber(value, 0l);
+	}
+
+	/**
+	 * The reverse operation to {@link StringUtils#formatNumber(long)}: it will
+	 * read a "display" number that can contain a "M" or "k" suffix and return
+	 * the full value.
+	 * <p>
+	 * Of course, the conversion to and from display form is lossy (example:
+	 * <tt>6870</tt> to "6.5k" to <tt>6500</tt>).
+	 * 
+	 * @param value
+	 *            the value in display form with possible "M" and "k" suffixes,
+	 *            can be NULL
+	 * @param def
+	 *            the default value if it is not possible to convert the given
+	 *            value to a number
+	 * 
+	 * @return the value as a number, or 0 if not possible to convert
+	 */
+	public static long toNumber(String value, long def) {
+		long count = def;
+		if (value != null) {
+			value = value.trim().toLowerCase();
+			try {
+				long mult = 1;
+				if (value.endsWith("g")) {
+					value = value.substring(0, value.length() - 1).trim();
+					mult = 1000000000;
+				} else if (value.endsWith("m")) {
+					value = value.substring(0, value.length() - 1).trim();
+					mult = 1000000;
+				} else if (value.endsWith("k")) {
+					value = value.substring(0, value.length() - 1).trim();
+					mult = 1000;
+				}
+
+				long deci = 0;
+				if (value.contains(".")) {
+					String[] tab = value.split("\\.");
+					if (tab.length != 2) {
+						throw new NumberFormatException(value);
+					}
+					double decimal = Double.parseDouble("0."
+							+ tab[tab.length - 1]);
+					deci = ((long) (mult * decimal));
+					value = tab[0];
+				}
+				count = mult * Long.parseLong(value) + deci;
+			} catch (Exception e) {
+			}
+		}
+
+		return count;
+	}
+
 	/**
 	 * The "remove accents" pattern.
 	 *