regexp

ass3/zbirnik/parsing/input.asm

@@ -0,0 +1,42 @@
+arithr START 0 .komentar1
+    LDS #11  .komentar2
+    LDT #5
+    .komentar3
+    LDA ZERO
+    ADDR S, A
+    ADDR T, A
+    STA sum 
+    
+    .komentar4
+    LDA ZERO 
+    ADDR S, A 
+    SUBR T, A
+    STA diff
+
+    LDA ZERO 
+    ADDR S, A
+    MULR T, A
+    STA prod
+
+    LDA ZERO 
+    ADDR S, A
+    DIVR T, A
+    STA quot
+
+    LDA ZERO
+    ADDR S, A
+LOOP SUBR T, A .komentar5
+    COMPR A, T
+    JGT LOOP
+    JEQ LOOP
+    STA mod 
+HALT J HALT 
+    END arithr
+
+ZERO WORD 0 
+sum RESW 1
+diff RESW 1
+prod RESW 1
+quot RESW 1 .komentar6
+mod RESW 1
+.komentar7

ass3/zbirnik/parsing/pregledovalnik.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+    "fmt"
+    "os"    
+    "regexp"
+)
+
+/*
+type ukaz struct {
+    opcode int 
+    st_operandov int
+    format int
+}
+
+var ukazna_tabela = map[string]ukaz{
+    "LDA":
+}*/
+
+func main() {
+    inputbyte, err := os.ReadFile("input.asm")
+    if err != nil {
+        fmt.Println("Error reading input file: ", err)
+        return
+    }
+    input := string(inputbyte)
+    pattern := regexp.MustCompile(`.*\n`)    
+    matches := pattern.FindAllString(input, -1)
+    //var cleared_matches []string
+    for _, el := range matches {
+        match_pure_comment, err := regexp.MatchString(`(?m)^[\t ]*\..*$\n`, el)
+        if err != nil {
+            fmt.Println("Error while matching string.")
+        }
+        if match_pure_comment {
+            continue
+        }
+        match_empty, err := regexp.MatchString(`(?m)^[\t ]*$\n`, el)
+        if err != nil {
+            fmt.Println("Error while matching string.")
+        }
+        if match_empty {
+            continue
+        }
+        match_command, err := regexp.MatchString(``, el)
+        fmt.Print(el)     
+    }
+    //Zbirnik mora opraviti naslednje naloge:
+    //1) Pregledati in razčleniti zbirniški stavek (pregledovalnik)
+    //2) Mnemonike nadomestiti z operacijskimi kodami
+    //3) Simbolična imena nadomestiti z ustreznimi številskimi ekvivalenti 
+    //4) Razrešiti simbolične operande
+    //...
+    //<zbirniski stavek> ::== [<oznaka stavka>] <ločilo> <mnemonik> <ločilo> {<operand> <ločilo>} [<komentar>]
+}

ass3/zbirnik/parsing/test.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+ "fmt"
+ "regexp"
+)
+
+func main() {
+    pattern := regexp.MustCompile(`o\w*g`)
+    fmt.Println(pattern.FindString("oogenesis")) // returns ""
+    fmt.Println(pattern.FindString("ck"))        // returns "ook"
+    fmt.Println(pattern.FindString("oocyst"))    // returns ""
+    fmt.Println(pattern.FindString("book"))      // returns "ook"}
+    match, what := regexp.MatchString("p([a-z]+)ch", "peach")
+    fmt.Println(match)
+    fmt.Println(what)
+}