BCmath extension code reformatting (php#11896)

Re-formats the BCmath extension to have consistent formatting.

Mostly, it adds the spaces in calculations to have them more readable.

Also:

   -  removes unused headers
   -  removes few variables which are used only once in the code

Co-authored-by: George Peter Banyard <girgias@php.net>

Author: jorgsowa

ext/bcmath/libbcmath/src/add.c

@@ -39,34 +39,30 @@
    N1 is added to N2 and the result placed into RESULT.  SCALE_MIN
    is the minimum scale for the result. */
 
-void bc_add (bc_num n1, bc_num n2, bc_num *result, size_t scale_min)
+void bc_add(bc_num n1, bc_num n2, bc_num *result, size_t scale_min)
 {
 	bc_num sum = NULL;
-	int cmp_res;
-	size_t res_scale;
 
 	if (n1->n_sign == n2->n_sign) {
-		sum = _bc_do_add (n1, n2, scale_min);
+		sum = _bc_do_add(n1, n2, scale_min);
 		sum->n_sign = n1->n_sign;
 	} else {
 		/* subtraction must be done. */
 		/* Compare magnitudes. */
-		cmp_res = _bc_do_compare(n1, n2, false, false);
-		switch (cmp_res) {
+		switch (_bc_do_compare(n1, n2, false, false)) {
 			case -1:
 				/* n1 is less than n2, subtract n1 from n2. */
-				sum = _bc_do_sub (n2, n1, scale_min);
+				sum = _bc_do_sub(n2, n1, scale_min);
 				sum->n_sign = n2->n_sign;
 				break;
-			case  0:
+			case 0:
 				/* They are equal! return zero with the correct scale! */
-				res_scale = MAX (scale_min, MAX(n1->n_scale, n2->n_scale));
-				sum = bc_new_num (1, res_scale);
-				memset (sum->n_value, 0, res_scale+1);
+				sum = bc_new_num (1, MAX(scale_min, MAX(n1->n_scale, n2->n_scale)));
+				memset(sum->n_value, 0, sum->n_scale + 1);
 				break;
-			case  1:
+			case 1:
 				/* n2 is less than n1, subtract n2 from n1. */
-				sum = _bc_do_sub (n1, n2, scale_min);
+				sum = _bc_do_sub(n1, n2, scale_min);
 				sum->n_sign = n1->n_sign;
 		}
 	}

ext/bcmath/libbcmath/src/bcmath.h

@@ -61,7 +61,7 @@ typedef struct bc_struct {
 #include "../../php_bcmath.h" /* Needed for BCG() macro */
 
 /* The base used in storing the numbers in n_value above.
-   Currently this MUST be 10. */
+   Currently, this MUST be 10. */
 
 #define BASE 10
 

ext/bcmath/libbcmath/src/compare.c

@@ -30,9 +30,9 @@
 *************************************************************************/
 
 #include <stdbool.h>
-#include <stddef.h>
 #include "bcmath.h"
 #include "private.h"
+#include <stddef.h>
 
 
 /* Compare two bc numbers.  Return value is 0 if equal, -1 if N1 is less
@@ -46,9 +46,11 @@ int _bc_do_compare(bc_num n1, bc_num n2, bool use_sign, bool ignore_last)
 	/* First, compare signs. */
 	if (use_sign && n1->n_sign != n2->n_sign) {
 		if (n1->n_sign == PLUS) {
-			return (1);	/* Positive N1 > Negative N2 */
+			/* Positive N1 > Negative N2 */
+			return (1);
 		} else {
-			return (-1);	/* Negative N1 < Positive N1 */
+			/* Negative N1 < Positive N1 */
+			return (-1);
 		}
 	}
 
@@ -107,7 +109,7 @@ int _bc_do_compare(bc_num n1, bc_num n2, bool use_sign, bool ignore_last)
 	/* They are equal up to the last part of the equal part of the fraction. */
 	if (n1->n_scale != n2->n_scale) {
 		if (n1->n_scale > n2->n_scale) {
-			for (count = n1->n_scale-n2->n_scale; count>0; count--) {
+			for (count = n1->n_scale - n2->n_scale; count > 0; count--) {
 				if (*n1ptr++ != 0) {
 					/* Magnitude of n1 > n2. */
 					if (!use_sign || n1->n_sign == PLUS) {
@@ -118,7 +120,7 @@ int _bc_do_compare(bc_num n1, bc_num n2, bool use_sign, bool ignore_last)
 				}
 			}
 		} else {
-			for (count = n2->n_scale-n1->n_scale; count>0; count--) {
+			for (count = n2->n_scale - n1->n_scale; count > 0; count--) {
 				if (*n2ptr++ != 0) {
 					/* Magnitude of n1 < n2. */
 					if (!use_sign || n1->n_sign == PLUS) {

ext/bcmath/libbcmath/src/debug.c

@@ -36,7 +36,7 @@
 
 /* pn prints the number NUM in base 10. */
 
-static void out_char (char c)
+static void out_char(char c)
 {
 	putchar(c);
 }
@@ -45,16 +45,16 @@ static void out_char (char c)
 void pn(bc_num num)
 {
 	bc_out_num(num, 10, out_char, 0);
-	out_char ('\n');
+	out_char('\n');
 }
 
 
 /* pv prints a character array as if it was a string of bcd digits. */
-void pv (char *name, unsigned char *num, size_t len)
+void pv(char *name, unsigned char *num, size_t len)
 {
 	printf("%s=", name);
-	for (size_t i = 0; i < len; i++){
-		printf ("%c",BCD_CHAR(num[i]));
+	for (size_t i = 0; i < len; i++) {
+		printf("%c", BCD_CHAR(num[i]));
 	}
 	printf("\n");
 }

ext/bcmath/libbcmath/src/div.c

@@ -33,6 +33,7 @@
 #include "private.h"
 #include <stdbool.h>
 #include <stddef.h>
+#include <string.h>
 #include "zend_alloc.h"
 
 
@@ -43,7 +44,7 @@
 
 static void _one_mult(unsigned char *num, size_t size, int digit, unsigned char *result)
 {
-	int carry, value;
+	size_t carry, value;
 	unsigned char *nptr, *rptr;
 
 	if (digit == 0) {
@@ -53,8 +54,8 @@ static void _one_mult(unsigned char *num, size_t size, int digit, unsigned char
 			memcpy(result, num, size);
 		} else {
 			/* Initialize */
-			nptr = (unsigned char *) (num+size-1);
-			rptr = (unsigned char *) (result+size-1);
+			nptr = (unsigned char *) (num + size - 1);
+			rptr = (unsigned char *) (result + size - 1);
 			carry = 0;
 
 			while (size-- > 0) {
@@ -74,121 +75,113 @@ static void _one_mult(unsigned char *num, size_t size, int digit, unsigned char
 /* The full division routine. This computes N1 / N2.  It returns
    true if the division is ok and the result is in QUOT.  The number of
    digits after the decimal point is SCALE. It returns false if division
-   by zero is tried.  The algorithm is found in Knuth Vol 2. p237. */
+   by zero is tried. The algorithm is found in Knuth Vol 2. p237. */
 bool bc_divide(bc_num n1, bc_num n2, bc_num *quot, int scale)
 {
 	bc_num qval;
 	unsigned char *num1, *num2;
 	unsigned char *ptr1, *ptr2, *n2ptr, *qptr;
-	int  scale1, val;
-	unsigned int  len1, len2, scale2, qdigits, extra, count;
-	unsigned int  qdig, qguess, borrow, carry;
+	int scale1, val;
+	unsigned int len1, len2, scale2, qdigits, extra, count;
+	unsigned int qdig, qguess, borrow, carry;
 	unsigned char *mval;
+	unsigned int norm;
 	bool zero;
-	unsigned int  norm;
 
 	/* Test for divide by zero. */
 	if (bc_is_zero(n2)) {
 		return false;
 	}
 
-	/* Test for divide by 1.  If it is we must truncate. */
-	if (n2->n_scale == 0) {
-		if (n2->n_len == 1 && *n2->n_value == 1) {
-			qval = bc_new_num (n1->n_len, scale);
-			qval->n_sign = (n1->n_sign == n2->n_sign ? PLUS : MINUS);
-			memset (&qval->n_value[n1->n_len],0,scale);
-			memcpy (qval->n_value, n1->n_value, n1->n_len + MIN(n1->n_scale,scale));
-			bc_free_num (quot);
-			*quot = qval;
-		}
+	/* Test for divide by 1. If it is we must truncate. */
+	if (n2->n_scale == 0 && n2->n_len == 1 && *n2->n_value == 1) {
+		qval = bc_new_num (n1->n_len, scale);
+		qval->n_sign = (n1->n_sign == n2->n_sign ? PLUS : MINUS);
+		memset(&qval->n_value[n1->n_len], 0, scale);
+		memcpy(qval->n_value, n1->n_value, n1->n_len + MIN(n1->n_scale, scale));
+		bc_free_num (quot);
+		*quot = qval;
 	}
 
 	/* Set up the divide.  Move the decimal point on n1 by n2's scale.
 	   Remember, zeros on the end of num2 are wasted effort for dividing. */
 	scale2 = n2->n_scale;
-	n2ptr = (unsigned char *) n2->n_value+n2->n_len+scale2-1;
-	while ((scale2 > 0) && (*n2ptr-- == 0)) {
+	n2ptr = (unsigned char *) n2->n_value + n2->n_len + scale2 - 1;
+	while ((scale2 > 0) && (*n2ptr == 0)) {
 		scale2--;
+		n2ptr--;
 	}
 
 	len1 = n1->n_len + scale2;
 	scale1 = n1->n_scale - scale2;
-	if (scale1 < scale) {
-		extra = scale - scale1;
-	} else {
-		extra = 0;
-	}
-	num1 = (unsigned char *) safe_emalloc (1, n1->n_len+n1->n_scale, extra+2);
-	memset (num1, 0, n1->n_len+n1->n_scale+extra+2);
-	memcpy (num1+1, n1->n_value, n1->n_len+n1->n_scale);
+	extra = MAX(scale - scale1, 0);
+
+	num1 = (unsigned char *) safe_emalloc(1, n1->n_len + n1->n_scale, extra + 2);
+	memset(num1, 0, n1->n_len + n1->n_scale + extra + 2);
+	memcpy(num1 + 1, n1->n_value, n1->n_len + n1->n_scale);
 
 	len2 = n2->n_len + scale2;
-	num2 = (unsigned char *) safe_emalloc (1, len2, 1);
-	memcpy (num2, n2->n_value, len2);
-	*(num2+len2) = 0;
+	num2 = (unsigned char *) safe_emalloc(1, len2, 1);
+	memcpy(num2, n2->n_value, len2);
+	*(num2 + len2) = 0;
 	n2ptr = num2;
 	while (*n2ptr == 0) {
 		n2ptr++;
 		len2--;
 	}
 
 	/* Calculate the number of quotient digits. */
-	if (len2 > len1+scale) {
-		qdigits = scale+1;
+	if (len2 > len1 + scale) {
+		qdigits = scale + 1;
 		zero = true;
 	} else {
 		zero = false;
 		if (len2 > len1) {
 			/* One for the zero integer part. */
-			qdigits = scale+1;
+			qdigits = scale + 1;
 		} else {
-			qdigits = len1-len2+scale+1;
+			qdigits = len1 - len2 + scale + 1;
 		}
 	}
 
 	/* Allocate and zero the storage for the quotient. */
-	qval = bc_new_num (qdigits-scale,scale);
-	memset (qval->n_value, 0, qdigits);
+	qval = bc_new_num (qdigits - scale, scale);
+	memset(qval->n_value, 0, qdigits);
 
 	/* Allocate storage for the temporary storage mval. */
 	mval = (unsigned char *) safe_emalloc(1, len2, 1);
 
 	/* Now for the full divide algorithm. */
 	if (!zero) {
 		/* Normalize */
-		norm = 10 / ((int)*n2ptr + 1);
+		norm = 10 / ((int) *n2ptr + 1);
 		if (norm != 1) {
-			_one_mult (num1, len1+scale1+extra+1, norm, num1);
-			_one_mult (n2ptr, len2, norm, n2ptr);
+			_one_mult(num1, len1 + scale1 + extra + 1, norm, num1);
+			_one_mult(n2ptr, len2, norm, n2ptr);
 		}
 
 		/* Initialize divide loop. */
 		qdig = 0;
 		if (len2 > len1) {
-			qptr = (unsigned char *) qval->n_value+len2-len1;
+			qptr = (unsigned char *) qval->n_value + len2 - len1;
 		} else {
 			qptr = (unsigned char *) qval->n_value;
 		}
 
 		/* Loop */
-		while (qdig <= len1+scale-len2) {
+		while (qdig <= len1 + scale - len2) {
 			/* Calculate the quotient digit guess. */
 			if (*n2ptr == num1[qdig]) {
 				qguess = 9;
 			} else {
-				qguess = (num1[qdig]*10 + num1[qdig+1]) / *n2ptr;
+				qguess = (num1[qdig] * 10 + num1[qdig + 1]) / *n2ptr;
 			}
 
 			/* Test qguess. */
-			if (
-				n2ptr[1]*qguess > (num1[qdig]*10 + num1[qdig+1] - *n2ptr*qguess)*10 + num1[qdig+2]
-			) {
+			if (n2ptr[1] * qguess > (num1[qdig] * 10 + num1[qdig + 1] - *n2ptr * qguess) * 10 + num1[qdig + 2]) {
 				qguess--;
 				/* And again. */
-				if (
-					n2ptr[1]*qguess > (num1[qdig]*10 + num1[qdig+1] - *n2ptr*qguess)*10 + num1[qdig+2]
-				) {
+				if (n2ptr[1] * qguess > (num1[qdig] * 10 + num1[qdig + 1] - *n2ptr * qguess) * 10 + num1[qdig + 2]) {
 					qguess--;
 				}
 			}
@@ -197,10 +190,10 @@ bool bc_divide(bc_num n1, bc_num n2, bc_num *quot, int scale)
 			borrow = 0;
 			if (qguess != 0) {
 				*mval = 0;
-				_one_mult (n2ptr, len2, qguess, mval+1);
-				ptr1 = (unsigned char *) num1+qdig+len2;
-				ptr2 = (unsigned char *) mval+len2;
-				for (count = 0; count < len2+1; count++) {
+				_one_mult(n2ptr, len2, qguess, mval + 1);
+				ptr1 = (unsigned char *) num1 + qdig + len2;
+				ptr2 = (unsigned char *) mval + len2;
+				for (count = 0; count < len2 + 1; count++) {
 					val = (int) *ptr1 - (int) *ptr2-- - borrow;
 					if (val < 0) {
 						val += 10;
@@ -215,8 +208,8 @@ bool bc_divide(bc_num n1, bc_num n2, bc_num *quot, int scale)
 			/* Test for negative result. */
 			if (borrow == 1) {
 				qguess--;
-				ptr1 = (unsigned char *) num1+qdig+len2;
-				ptr2 = (unsigned char *) n2ptr+len2-1;
+				ptr1 = (unsigned char *) num1 + qdig + len2;
+				ptr2 = (unsigned char *) n2ptr + len2 - 1;
 				carry = 0;
 				for (count = 0; count < len2; count++) {
 					val = (int) *ptr1 + (int) *ptr2-- + carry;
@@ -240,7 +233,7 @@ bool bc_divide(bc_num n1, bc_num n2, bc_num *quot, int scale)
 	}
 
 	/* Clean up and return the number. */
-	qval->n_sign = ( n1->n_sign == n2->n_sign ? PLUS : MINUS );
+	qval->n_sign = (n1->n_sign == n2->n_sign ? PLUS : MINUS);
 	if (bc_is_zero(qval)) {
 		qval->n_sign = PLUS;
 	}

ext/bcmath/libbcmath/src/divmod.c

@@ -53,16 +53,16 @@ bool bc_divmod(bc_num num1, bc_num num2, bc_num *quot, bc_num *rem, size_t scale
 	}
 
 	/* Calculate final scale. */
-	rscale = MAX (num1->n_scale, num2->n_scale+scale);
+	rscale = MAX (num1->n_scale, num2->n_scale + scale);
 	bc_init_num(&temp);
 
 	/* Calculate it. */
-	bc_divide (num1, num2, &temp, 0);
+	bc_divide(num1, num2, &temp, 0);
 	if (quot) {
 		quotient = bc_copy_num(temp);
 	}
-	bc_multiply (temp, num2, &temp, rscale);
-	bc_sub (num1, temp, rem, rscale);
+	bc_multiply(temp, num2, &temp, rscale);
+	bc_sub(num1, temp, rem, rscale);
 	bc_free_num (&temp);
 
 	if (quot) {