luci-base: Import latest version of jsmin
Signed-off-by: Howard Su <howard0su@gmail.com>
(cherry picked from commit 9935a5c735)
This commit is contained in:
Howard Su
Jo-Philipp Wich
parent
7de3420215
commit
01f0567951
1 changed files with 150 additions and 123 deletions
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@ -1,7 +1,7 @@
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/* jsmin.c
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2011-09-30
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2019-10-30
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Copyright (c) 2002 Douglas Crockford (www.crockford.com)
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Copyright (C) 2002 Douglas Crockford (www.crockford.com)
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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@ -27,21 +27,34 @@ SOFTWARE.
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#include <stdlib.h>
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#include <stdio.h>
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static int theA;
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static int theB;
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static int theLookahead = EOF;
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static int the_a;
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static int the_b;
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static int look_ahead = EOF;
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static int the_x = EOF;
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static int the_y = EOF;
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/* isAlphanum -- return true if the character is a letter, digit, underscore,
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static void error(char* string) {
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fputs("JSMIN Error: ", stderr);
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fputs(string, stderr);
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fputc('\n', stderr);
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exit(1);
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}
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/* is_alphanum -- return true if the character is a letter, digit, underscore,
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dollar sign, or non-ASCII character.
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*/
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static int
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isAlphanum(int c)
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{
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return ((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') ||
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(c >= 'A' && c <= 'Z') || c == '_' || c == '$' || c == '\\' ||
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c > 126);
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static int is_alphanum(int codeunit) {
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return (
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(codeunit >= 'a' && codeunit <= 'z')
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|| (codeunit >= '0' && codeunit <= '9')
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|| (codeunit >= 'A' && codeunit <= 'Z')
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|| codeunit == '_'
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|| codeunit == '$'
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|| codeunit == '\\'
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|| codeunit > 126
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);
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}
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@ -50,32 +63,28 @@ isAlphanum(int c)
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linefeed.
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*/
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static int
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get()
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{
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int c = theLookahead;
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theLookahead = EOF;
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if (c == EOF) {
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c = getc(stdin);
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static int get() {
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int codeunit = look_ahead;
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look_ahead = EOF;
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if (codeunit == EOF) {
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codeunit = getc(stdin);
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}
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if (c >= ' ' || c == '\n' || c == EOF) {
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return c;
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if (codeunit >= ' ' || codeunit == '\n' || codeunit == EOF) {
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return codeunit;
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}
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if (c == '\r') {
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if (codeunit == '\r') {
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return '\n';
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}
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return ' ';
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}
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/* peek -- get the next character without getting it.
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/* peek -- get the next character without advancing.
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*/
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static int
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peek()
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{
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theLookahead = get();
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return theLookahead;
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static int peek() {
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look_ahead = get();
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return look_ahead;
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}
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@ -83,39 +92,38 @@ peek()
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if a '/' is followed by a '/' or '*'.
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*/
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static int
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next()
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{
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int c = get();
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if (c == '/') {
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static int next() {
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int codeunit = get();
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if (codeunit == '/') {
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switch (peek()) {
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case '/':
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for (;;) {
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c = get();
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if (c <= '\n') {
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return c;
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codeunit = get();
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if (codeunit <= '\n') {
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break;
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}
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}
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break;
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case '*':
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get();
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for (;;) {
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while (codeunit != ' ') {
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switch (get()) {
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case '*':
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if (peek() == '/') {
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get();
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return ' ';
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codeunit = ' ';
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}
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break;
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case EOF:
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fprintf(stderr, "Error: JSMIN Unterminated comment.\n");
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exit(1);
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error("Unterminated comment.");
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}
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}
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default:
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return c;
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break;
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}
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}
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return c;
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the_y = the_x;
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the_x = codeunit;
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return codeunit;
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}
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@ -123,77 +131,92 @@ next()
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1 Output A. Copy B to A. Get the next B.
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2 Copy B to A. Get the next B. (Delete A).
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3 Get the next B. (Delete B).
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action treats a string as a single character. Wow!
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action recognizes a regular expression if it is preceded by ( or , or =.
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action treats a string as a single character.
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action recognizes a regular expression if it is preceded by the likes of
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'(' or ',' or '='.
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*/
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static void
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action(int d)
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{
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switch (d) {
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static void action(int determined) {
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switch (determined) {
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case 1:
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putc(theA, stdout);
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putc(the_a, stdout);
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if (
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(the_y == '\n' || the_y == ' ')
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&& (the_a == '+' || the_a == '-' || the_a == '*' || the_a == '/')
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&& (the_b == '+' || the_b == '-' || the_b == '*' || the_b == '/')
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) {
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putc(the_y, stdout);
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}
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case 2:
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theA = theB;
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if (theA == '\'' || theA == '"' || theA == '`') {
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the_a = the_b;
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if (the_a == '\'' || the_a == '"' || the_a == '`') {
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for (;;) {
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putc(theA, stdout);
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theA = get();
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if (theA == theB) {
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putc(the_a, stdout);
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the_a = get();
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if (the_a == the_b) {
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break;
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}
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if (theA == '\\') {
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putc(theA, stdout);
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theA = get();
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if (the_a == '\\') {
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putc(the_a, stdout);
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the_a = get();
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}
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if (theA == EOF) {
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fprintf(stderr, "Error: JSMIN unterminated string literal.");
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exit(1);
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if (the_a == EOF) {
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error("Unterminated string literal.");
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}
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}
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}
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case 3:
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theB = next();
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if (theB == '/' && (theA == '(' || theA == ',' || theA == '=' ||
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theA == ':' || theA == '[' || theA == '!' ||
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theA == '&' || theA == '|' || theA == '?' ||
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theA == '{' || theA == '}' || theA == ';' ||
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theA == '\n')) {
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putc(theA, stdout);
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putc(theB, stdout);
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the_b = next();
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if (the_b == '/' && (
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the_a == '(' || the_a == ',' || the_a == '=' || the_a == ':'
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|| the_a == '[' || the_a == '!' || the_a == '&' || the_a == '|'
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|| the_a == '?' || the_a == '+' || the_a == '-' || the_a == '~'
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|| the_a == '*' || the_a == '/' || the_a == '{' || the_a == '}'
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|| the_a == ';'
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)) {
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putc(the_a, stdout);
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if (the_a == '/' || the_a == '*') {
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putc(' ', stdout);
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}
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putc(the_b, stdout);
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for (;;) {
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theA = get();
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if (theA == '[') {
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the_a = get();
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if (the_a == '[') {
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for (;;) {
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putc(theA, stdout);
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theA = get();
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if (theA == ']') {
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putc(the_a, stdout);
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the_a = get();
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if (the_a == ']') {
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break;
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}
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if (theA == '\\') {
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putc(theA, stdout);
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theA = get();
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if (the_a == '\\') {
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putc(the_a, stdout);
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the_a = get();
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}
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if (theA == EOF) {
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fprintf(stderr,
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"Error: JSMIN unterminated set in Regular Expression literal.\n");
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exit(1);
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if (the_a == EOF) {
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error(
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"Unterminated set in Regular Expression literal."
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);
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}
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}
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} else if (theA == '/') {
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} else if (the_a == '/') {
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switch (peek()) {
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case '/':
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case '*':
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error(
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"Unterminated set in Regular Expression literal."
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);
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}
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break;
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} else if (theA =='\\') {
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putc(theA, stdout);
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theA = get();
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} else if (the_a =='\\') {
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putc(the_a, stdout);
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the_a = get();
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}
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if (theA == EOF) {
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fprintf(stderr,
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"Error: JSMIN unterminated Regular Expression literal.\n");
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exit(1);
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if (the_a == EOF) {
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error("Unterminated Regular Expression literal.");
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}
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putc(theA, stdout);
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putc(the_a, stdout);
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}
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theB = next();
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the_b = next();
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}
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}
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}
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@ -205,51 +228,56 @@ action(int d)
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Most spaces and linefeeds will be removed.
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*/
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static void
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jsmin()
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{
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theA = '\n';
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static void jsmin() {
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if (peek() == 0xEF) {
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get();
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get();
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get();
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}
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the_a = '\n';
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action(3);
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while (theA != EOF) {
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switch (theA) {
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while (the_a != EOF) {
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switch (the_a) {
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case ' ':
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if (isAlphanum(theB)) {
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action(1);
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} else {
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action(2);
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}
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action(
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is_alphanum(the_b)
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? 1
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: 2
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);
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break;
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case '\n':
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switch (theB) {
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switch (the_b) {
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case '{':
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case '[':
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case '(':
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case '+':
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case '-':
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case '!':
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case '~':
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action(1);
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break;
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case ' ':
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action(3);
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break;
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default:
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if (isAlphanum(theB)) {
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action(1);
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} else {
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action(2);
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}
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action(
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is_alphanum(the_b)
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? 1
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: 2
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);
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}
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break;
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default:
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switch (theB) {
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switch (the_b) {
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case ' ':
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if (isAlphanum(theA)) {
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action(1);
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break;
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}
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action(3);
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action(
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is_alphanum(the_a)
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? 1
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: 3
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);
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break;
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case '\n':
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switch (theA) {
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switch (the_a) {
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case '}':
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case ']':
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case ')':
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@ -261,11 +289,11 @@ jsmin()
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action(1);
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break;
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default:
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if (isAlphanum(theA)) {
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action(1);
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} else {
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action(3);
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}
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action(
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is_alphanum(the_a)
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? 1
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: 3
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);
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}
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break;
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default:
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@ -280,9 +308,8 @@ jsmin()
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/* main -- Output any command line arguments as comments
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and then minify the input.
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*/
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extern int
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main(int argc, char* argv[])
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{
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extern int main(int argc, char* argv[]) {
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int i;
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for (i = 1; i < argc; i += 1) {
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fprintf(stdout, "// %s\n", argv[i]);
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