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authorErik Andersen2000-02-08 19:58:47 +0000
committerErik Andersen2000-02-08 19:58:47 +0000
commite49d5ecbbe51718fa925b6890a735e5937cc2aa2 (patch)
treec90bda10731ad9333ce3b404f993354c9fc104b8 /math.c
parentc0bf817bbc5c7867fbe8fb76d5c39f8ee802692f (diff)
downloadbusybox-e49d5ecbbe51718fa925b6890a735e5937cc2aa2.zip
busybox-e49d5ecbbe51718fa925b6890a735e5937cc2aa2.tar.gz
Some formatting updates (ran the code through indent)
-Erik
Diffstat (limited to 'math.c')
-rw-r--r--math.c106
1 files changed, 47 insertions, 59 deletions
diff --git a/math.c b/math.c
index 1f6d093..75b4cde 100644
--- a/math.c
+++ b/math.c
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
#include "internal.h"
#include <stdio.h>
#include <stdlib.h>
@@ -8,126 +9,114 @@
static const char math_usage[] = "math expression ...";
-static double stack[100];
-static unsigned int pointer;
+static double stack[100];
+static unsigned int pointer;
-static void
-push(double a)
+static void push(double a)
{
- if ( pointer >= (sizeof(stack) / sizeof(*stack)) ) {
+ if (pointer >= (sizeof(stack) / sizeof(*stack))) {
fprintf(stderr, "math: stack overflow\n");
exit(-1);
- }
- else
+ } else
stack[pointer++] = a;
}
-static double
-pop()
+static double pop()
{
- if ( pointer == 0 ) {
+ if (pointer == 0) {
fprintf(stderr, "math: stack underflow\n");
exit(-1);
}
return stack[--pointer];
}
-static void
-add()
+static void add()
{
push(pop() + pop());
}
-static void
-sub()
+static void sub()
{
- double subtrahend = pop();
+ double subtrahend = pop();
push(pop() - subtrahend);
}
-static void
-mul()
+static void mul()
{
push(pop() * pop());
}
-static void
-divide()
+static void divide()
{
- double divisor = pop();
+ double divisor = pop();
+
push(pop() / divisor);
}
-static void
-and()
+static void and()
{
- push((unsigned int)pop() & (unsigned int)pop());
+ push((unsigned int) pop() & (unsigned int) pop());
}
-static void
-or()
+static void or()
{
- push((unsigned int)pop() | (unsigned int)pop());
+ push((unsigned int) pop() | (unsigned int) pop());
}
-static void
-eor()
+static void eor()
{
- push((unsigned int)pop() ^ (unsigned int)pop());
+ push((unsigned int) pop() ^ (unsigned int) pop());
}
-static void
-not()
+static void not()
{
- push(~(unsigned int)pop());
+ push(~(unsigned int) pop());
}
-static void
-print()
+static void print()
{
printf("%g\n", pop());
}
struct op {
- const char * name;
- void (*function)();
+ const char *name;
+ void (*function) ();
};
-static const struct op operators[] = {
- { "add", add },
- { "and", and },
- { "div", divide },
- { "eor", eor },
- { "mul", mul },
- { "not", not },
- { "or", or },
- { "sub", sub },
- { 0, 0 }
+static const struct op operators[] = {
+ {"add", add},
+ {"and", and},
+ {"div", divide},
+ {"eor", eor},
+ {"mul", mul},
+ {"not", not},
+ {"or", or},
+ {"sub", sub},
+ {0, 0}
};
-static void
-stack_machine(const char * argument)
+static void stack_machine(const char *argument)
{
- char * endPointer = 0;
- double d;
- const struct op * o = operators;
+ char *endPointer = 0;
+ double d;
+ const struct op *o = operators;
- if ( argument == 0 ) {
+ if (argument == 0) {
print();
return;
}
d = strtod(argument, &endPointer);
- if ( endPointer != argument ) {
+ if (endPointer != argument) {
push(d);
return;
}
- while ( o->name != 0 ) {
- if ( strcmp(o->name, argument) == 0 ) {
- (*(o->function))();
+ while (o->name != 0) {
+ if (strcmp(o->name, argument) == 0) {
+ (*(o->function)) ();
return;
}
o++;
@@ -136,10 +125,9 @@ stack_machine(const char * argument)
exit(-1);
}
-int
-math_main(int argc, char * * argv)
+int math_main(int argc, char **argv)
{
- while ( argc >= 2 ) {
+ while (argc >= 2) {
stack_machine(argv[1]);
argv++;
argc--;