corey/lr
1
1
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

remove rpn module

Browse Source
This commit is contained in:
corey 2023-11-10 05:41:39 -06:00
parent 49e6954094
commit c82cfc3b0b
2 changed files with 0 additions and 110 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

92
rpn.c
View File

@ -1,92 +0,0 @@
#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#include<ctype.h>
#include<string.h>
#include"rpn.h"
#define VSIZE 256
//int main(int argc,char**argv)
//{
//struct state st={0};
//char*str="7-1+2";
//
//if(argc>1)str=argv[1];
//
//printf("str: '%s'\n",str);
//
//rpn_parse(&st,str);
//printf("parse:\n");
//rpn_print(&(st.nums),"%d");
//rpn_print(&(st.ops),"%c");
//
//while(st.ops.n)rpn_math(&st);
//printf("math:\n");
//rpn_print(&(st.nums),"%d");
//rpn_print(&(st.ops),"%c");
//}
void rpn_push(struct vec*v,int c){(v)->b[(v)->n]=(c);++(v)->n;}
int rpn_pop(struct vec*v){if((v)->n){--(v)->n;return v->b[v->n];}return -1;}
void rpn_parse(struct state*st,char*string)
{
//bool found=false;
if(!st||!string)return;
for(int i=0;string[i];++i)
{
if(isdigit(string[i]))
rpn_push((&st->nums),string[i]-'0');
else if(strchr("+-*/",string[i]))
{
while(st->ops.n>0)
rpn_math(st);
rpn_push((&st->ops),string[i]);
}
}
}
void rpn_math(struct state*st)
{
if(!st)return;
//printf("math: ");
for(int i=0;i<st->ops.n;++i)
{
//printf("(%c ",st->ops.b[i]);
int x=rpn_pop(&st->nums);
int y=rpn_pop(&st->nums);
int z;
switch(st->ops.b[i])
{
case '+':z=y+x;break;
case '-':z=y-x;break;
case '*':z=y*x;break;
case '/':z=y/x;break;
default:break;
}
//printf("%d,%d): %d ",y,x,z);
rpn_push(&st->nums,z);
rpn_pop(&st->ops);
//printf("N:");rpn_print(&st->nums,"%d");
}
//printf("\n");
}
void rpn_print(struct vec*v,char*fmt)
{
#define p printf
p("(%d/%d) [",v->n,VSIZE);
for(int i=0;i<v->n;++i)
{
p(fmt,v->b[i]);
if(i<v->n-1)
p(", ");
}
p("]\n");
#undef p
}

18
rpn.h
View File

@ -1,18 +0,0 @@
#pragma once
#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#include<ctype.h>
#include<string.h>
#define VSIZE 256
struct vec{int b[VSIZE];int n;};
struct state{struct vec nums;struct vec ops;};
int rpn_pop(struct vec*v);
void rpn_math(struct state*st);
void rpn_parse(struct state*st,char*string);
void rpn_print(struct vec*v,char*fmt);
void rpn_push(struct vec*v,int c);