Add support for 6502 assembly (#1245)

* Add support for 6502 assembly

* Address PR feedback

components.js

@@ -94,6 +94,10 @@ var components = {
 			"title": "AsciiDoc",
 			"owner": "Golmote"
 		},
+		"asm6502": {
+			"title": "6502 Assembly",
+			"owner": "kzurawel"
+		},
 		"aspnet": {
 			"title": "ASP.NET (C#)",
 			"require": "markup",

components/prism-asm6502.js

@@ -0,0 +1,28 @@
+Prism.languages.asm6502 = {
+	'comment': /;.*/,
+	'directive': {
+		pattern: /\.\w+(?= )/,
+		alias: 'keyword'
+	},
+	'string': /(["'`])(?:\\.|(?!\1)[^\\\r\n])*\1/,
+	'opcode': {
+    pattern: /\b(?:adc|and|asl|bcc|bcs|beq|bit|bmi|bne|bpl|brk|bvc|bvs|clc|cld|cli|clv|cmp|cpx|cpy|dec|dex|dey|eor|inc|inx|iny|jmp|jsr|lda|ldx|ldy|lsr|nop|ora|pha|php|pla|plp|rol|ror|rti|rts|sbc|sec|sed|sei|sta|stx|sty|tax|tay|tsx|txa|txs|tya|ADC|AND|ASL|BCC|BCS|BEQ|BIT|BMI|BNE|BPL|BRK|BVC|BVS|CLC|CLD|CLI|CLV|CMP|CPX|CPY|DEC|DEX|DEY|EOR|INC|INX|INY|JMP|JSR|LDA|LDX|LDY|LSR|NOP|ORA|PHA|PHP|PLA|PLP|ROL|ROR|RTI|RTS|SBC|SEC|SED|SEI|STA|STX|STY|TAX|TAY|TSX|TXA|TXS|TYA)\b/,
+		alias: 'property'
+	},
+	'hexnumber': {
+		pattern: /#?\$[\da-fA-F]{2,4}/,
+		alias: 'string'
+	},
+	'binarynumber': {
+		pattern: /#?%[01]+/,
+		alias: 'string'
+	},
+	'decimalnumber': {
+		pattern: /#?\d+/,
+		alias: 'string'
+	},
+	'register': {
+		pattern: /\b[xyaXYA]\b/,
+		alias: 'variable'
+	}
+};

examples/prism-asm6502.html

@@ -0,0 +1,42 @@
+<h1>6502 Assembly</h1>
+<p>To use this language, use the class "language-asm6502".</p>
+
+<h2>Comments</h2>
+<pre><code>; This is a comment</code></pre>
+
+<h2>Labels</h2>
+<pre><code>label1:   ; a label</code></pre>
+
+<h2>Opcodes</h2>
+<pre><code>
+SEI
+CLC
+
+; lowercase
+inx
+bne label1
+</code></pre>
+
+<h2>Assembler directives</h2>
+<pre><code>
+.segment CODE
+.word $07d3
+</code></pre>
+
+<h2>Registers</h2>
+<pre><code>
+ASL A  ; "A"
+LDA label1,x  ; "x"
+</code></pre>
+
+<h2>Strings</h2>
+<pre><code>
+.include "header.asm"
+</code></pre>
+
+<h2>Numbers</h2>
+<pre><code>
+LDA #127
+STA $80f0
+LDY #%01011000
+</code></pre>

plugins/show-language/prism-show-language.js

@@ -11,7 +11,7 @@ if (!Prism.plugins.toolbar) {
 }
 
 // The languages map is built automatically with gulp
-var Languages = /*languages_placeholder[*/{"html":"HTML","xml":"XML","svg":"SVG","mathml":"MathML","css":"CSS","clike":"C-like","javascript":"JavaScript","abap":"ABAP","actionscript":"ActionScript","apacheconf":"Apache Configuration","apl":"APL","applescript":"AppleScript","asciidoc":"AsciiDoc","aspnet":"ASP.NET (C#)","autohotkey":"AutoHotkey","autoit":"AutoIt","basic":"BASIC","csharp":"C#","cpp":"C++","coffeescript":"CoffeeScript","css-extras":"CSS Extras","django":"Django/Jinja2","fsharp":"F#","glsl":"GLSL","graphql":"GraphQL","http":"HTTP","inform7":"Inform 7","json":"JSON","latex":"LaTeX","livescript":"LiveScript","lolcode":"LOLCODE","matlab":"MATLAB","mel":"MEL","n4js":"N4JS","nasm":"NASM","nginx":"nginx","nsis":"NSIS","objectivec":"Objective-C","ocaml":"OCaml","opencl":"OpenCL","parigp":"PARI/GP","php":"PHP","php-extras":"PHP Extras","powershell":"PowerShell","properties":".properties","protobuf":"Protocol Buffers","jsx":"React JSX","renpy":"Ren'py","rest":"reST (reStructuredText)","sas":"SAS","sass":"Sass (Sass)","scss":"Sass (Scss)","sql":"SQL","typescript":"TypeScript","vbnet":"VB.Net","vhdl":"VHDL","vim":"vim","wiki":"Wiki markup","xojo":"Xojo (REALbasic)","yaml":"YAML"}/*]*/;
+var Languages = /*languages_placeholder[*/{"html":"HTML","xml":"XML","svg":"SVG","mathml":"MathML","css":"CSS","clike":"C-like","javascript":"JavaScript","abap":"ABAP","actionscript":"ActionScript","apacheconf":"Apache Configuration","apl":"APL","applescript":"AppleScript","asciidoc":"AsciiDoc","asm6502":"6502 Assembly","aspnet":"ASP.NET (C#)","autohotkey":"AutoHotkey","autoit":"AutoIt","basic":"BASIC","csharp":"C#","cpp":"C++","coffeescript":"CoffeeScript","css-extras":"CSS Extras","django":"Django/Jinja2","fsharp":"F#","glsl":"GLSL","graphql":"GraphQL","http":"HTTP","inform7":"Inform 7","json":"JSON","latex":"LaTeX","livescript":"LiveScript","lolcode":"LOLCODE","matlab":"MATLAB","mel":"MEL","n4js":"N4JS","nasm":"NASM","nginx":"nginx","nsis":"NSIS","objectivec":"Objective-C","ocaml":"OCaml","opencl":"OpenCL","parigp":"PARI/GP","php":"PHP","php-extras":"PHP Extras","powershell":"PowerShell","properties":".properties","protobuf":"Protocol Buffers","jsx":"React JSX","renpy":"Ren'py","rest":"reST (reStructuredText)","sas":"SAS","sass":"Sass (Sass)","scss":"Sass (Scss)","sql":"SQL","typescript":"TypeScript","vbnet":"VB.Net","vhdl":"VHDL","vim":"vim","wiki":"Wiki markup","xojo":"Xojo (REALbasic)","yaml":"YAML"}/*]*/;
 Prism.plugins.toolbar.registerButton('show-language', function(env) {
 	var pre = env.element.parentNode;
 	if (!pre || !/pre/i.test(pre.nodeName)) {

tests/languages/asm6502/comment_feature.test

@@ -0,0 +1,13 @@
+;
+; foo bar baz
+
+-------------------------
+
+[
+  ["comment", ";"],
+  ["comment", "; foo bar baz"]
+]
+
+-------------------------
+
+Check for comments

tests/languages/asm6502/directive_feature.test

@@ -0,0 +1,12 @@
+.segment CODE
+
+-------------------------
+
+[
+  ["directive", ".segment"],
+  " CODE"
+]
+
+-------------------------
+
+Check for directives

tests/languages/asm6502/number_feature.test

@@ -0,0 +1,18 @@
+LDA #127
+STA $8000
+LDX #%10001010
+
+-------------------------
+
+[
+  ["opcode", "LDA"],
+  ["decimalnumber", "#127"],
+  ["opcode", "STA"],
+  ["hexnumber", "$8000"],
+  ["opcode", "LDX"],
+  ["binarynumber", "#%10001010"]
+]
+
+-------------------------
+
+Check for numbers

tests/languages/asm6502/opcode_feature.test

@@ -0,0 +1,17 @@
+LDA
+BNE
+inx
+clc
+
+-------------------------------------
+
+[
+  ["opcode", "LDA"],
+  ["opcode", "BNE"],
+  ["opcode", "inx"],
+  ["opcode", "clc"]
+]
+
+-------------------------------------
+
+Check for opcodes

tests/languages/asm6502/register_feature.test

@@ -0,0 +1,17 @@
+LDA $8000,x
+ASL A
+
+-------------------------
+
+[
+  ["opcode", "LDA"],
+  ["hexnumber", "$8000"],
+  ",",
+  ["register", "x"],
+  ["opcode", "ASL"],
+  ["register", "A"]
+]
+
+-------------------------
+
+Check for registers

tests/languages/asm6502/string_feature.test

@@ -0,0 +1,12 @@
+.include "header.asm"
+
+-------------------------
+
+[
+  ["directive", ".include"],
+  ["string", "\"header.asm\""]
+]
+
+-------------------------
+
+Check for strings