first attempt at lcd menus

1 files changed, 126 insertions, 12 deletions

diff --git a/string_utils.c b/string_utils.c
index db077a7..95c643e 100644
--- a/string_utils.c
+++ b/string_utils.c
@@ -1,14 +1,3 @@
-/* START LIBRARY DESCRIPTION *********************************************
-FLOAT.LIB
-	Copyright (c) 2006, Avtech Electrosystems Ltd.
-
-DESCRIPTION:
-	Functions that deal with strings and floating point numbers.
-
-SUPPORT LIB'S:
-END DESCRIPTION **********************************************************/
-
-
 #include <string.h>
 #include <ctype.h>
 #include <math.h>
@@ -16,6 +5,9 @@ END DESCRIPTION **********************************************************/
 #include "globals.h"
 #include "string_utils.h"
 
+#include "lcd.h"  // FIXME
+
+
 void Float_To_Text(int decimal_digits,float number_in, gchar ** text_out)
 {
 	g_assert (*text_out == NULL);
@@ -33,7 +25,6 @@ void Float_To_Text(int decimal_digits,float number_in, gchar ** text_out)
 }
 
 
-/*----------------------------------------------------------------------------------------------------------*/
 gboolean String_is_it_numeric(char *parameter)
 {
 
@@ -46,3 +37,126 @@ gboolean String_is_it_numeric(char *parameter)
 	g_regex_unref (numeric_regex);
 	return match;
 }
+
+
+void String_Parameter_To_Text(float Float_To_Convert,int Int_To_Convert, int significant_digits,
+                             char *start_string,char *units,char *LCD_string,int show_plus_sign)
+{
+	// FIXME - crappy string func
+	char out_val[LCD_col_width+1];
+	char floating_val[32];
+	char String_of_spaces[LCD_col_width+1];
+	char unit_mult[10];	/* units multiplier, eg. M, k, u */
+
+	int i;						/* just a counter */
+	int shift_decimal_by;		/* if the exponent isn't a multiple of 3, the decimal point will be moved */
+	int decimal_location;		/* where the decimal is in the number string */
+	int chars_processed;		/* how many characters are in the parsed number string so far */
+
+	int exponent_val;			/* the exponent, in integer form */
+
+	/* Copy the floating point value to a string. Do not multiply to accomodate units; the roundoff */
+	/* is annoying. (e.g. 1.000 -> 0.999) */
+	/* Move the decimal with string manipulations instead. */
+
+	strcpy(LCD_string,start_string);
+
+	/* if significant_digits is zero, used the supplied integer rather than the floating number */
+
+	if (!significant_digits) {
+                sprintf(out_val, "%d", (int) Float_To_Convert);
+		strcat(LCD_string,out_val);
+	} else {
+		Float_To_Text(remote_digits_after_decimal,Float_To_Convert,floating_val);
+
+		/* -- COPY FIRST ONE OR TWO CHARACTERS -- */
+		if (floating_val[0]=='-') {		/* if it's negative ... */
+			decimal_location=2;				/* decimal at position two (e.g.: -2.23e-9) */
+			chars_processed=2;				/* two characters so far (e.g.: -2) */
+			out_val[0]='-';					/* copy minus sign */
+			out_val[1]=floating_val[1];	/* copy first digit */
+		} else if (show_plus_sign==YES) {	/* if it's positive and plus sign required ... */
+			decimal_location=1;				/* decimal at position one (e.g.: 2.23e-9) */
+			chars_processed=2;				/* two characters so far (e.g.: +2) */
+			out_val[0]='+';					/* add plus sign */
+			out_val[1]=floating_val[0];	/* copy first digit */
+		} else {									/* if it's positive and plus sign not required ... */
+			decimal_location=1;				/* decimal at position one (e.g.: 2.23e-9) */
+			chars_processed=1;				/* one character so far (e.g.: 2) */
+			out_val[0]=floating_val[0];	/* copy first digit */
+		}
+
+		/* -- FIND EXPONENT -- */
+		/* find how much the decimal has to be moved, by examining the exponent in the string and */
+		/* modding it by 3 */
+		exponent_val = atoi(floating_val+strlen(floating_val)-3);	/* read the last three characters */
+		/* e.g. +09, or -07 */
+
+		shift_decimal_by=(300+exponent_val) % 3;	/* added 300 to keep everything positive */
+
+		/* -- PICK UNITS -- */
+		if (exponent_val<12 && exponent_val>=9) {
+			strcpy(unit_mult,"G");
+		} else if (exponent_val<9 && exponent_val>=6) {
+			strcpy(unit_mult,"M");
+		} else if (exponent_val<6 && exponent_val>=3) {
+			strcpy(unit_mult,"k");
+		} else if (exponent_val<3 && exponent_val>=0) {
+			strcpy(unit_mult,"");
+		} else if (exponent_val<0 && exponent_val>=-3) {
+			strcpy(unit_mult,"m");
+		} else if (exponent_val<-3 && exponent_val>=-6) {
+			strcpy(unit_mult,"u");
+		} else if (exponent_val<-6 && exponent_val>=-9) {
+			strcpy(unit_mult,"n");
+		} else if (exponent_val<-9 && exponent_val>=-12) {
+			strcpy(unit_mult,"p");
+		}
+
+		if (exponent_val<-12) {
+			strcpy(unit_mult,"");   /* if parameter=0, don't use silly units */
+		}
+
+		/* -- MOVE DIGITS AROUND DECIMAL POINT -- */
+
+		/* move the digits that will come before the decimal */
+		for (i=decimal_location; i<decimal_location+shift_decimal_by; ++i) {
+			out_val[chars_processed]=floating_val[1+i];
+			++chars_processed;
+		}
+
+		/* put in the new decimal point */
+		out_val[chars_processed]='.';
+		++chars_processed;
+
+		/* copy the rest of the digits */
+		for (i=shift_decimal_by+1+decimal_location; i<significant_digits+3; ++i) {
+			out_val[chars_processed]=floating_val[i];
+			++chars_processed;
+			/* leave space for minus sign, decimal point, and extra digit on the end too */
+		}
+
+		/* -- TERMINATE STRING -- */
+		if ((show_plus_sign==YES) || (floating_val[0]=='-')) {
+			out_val[significant_digits+3]=0;
+		} else {
+			out_val[significant_digits+2]=0;
+		}
+
+
+		/* -- FINISH UP -- */
+
+		strcat(LCD_string,out_val);
+		LCD_string[strlen(LCD_string)-1]=0;	/* remove extra digit */
+
+		/* -- CHECK FOR TERMINATING DECIMAL POINT -- */
+		if (LCD_string[strlen(LCD_string)-1]=='.') {
+			LCD_string[strlen(LCD_string)-1]=0;
+		}
+
+		strcat(LCD_string,unit_mult);
+	}
+
+	strcat(LCD_string,units);
+}
+