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luci-base: Import latest version of jsmin

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Signed-off-by: Howard Su <howard0su@gmail.com>
This commit is contained in:
Howard Su 2020-02-29 23:30:15 +08:00
parent 7c6c043df7
commit 9935a5c735
1 changed files with 150 additions and 123 deletions
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273
modules/luci-base/src/jsmin.c
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@ -1,7 +1,7 @@
/* jsmin.c /* jsmin.c
2011-09-30 2019-10-30
Copyright (c) 2002 Douglas Crockford (www.crockford.com) Copyright (C) 2002 Douglas Crockford (www.crockford.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in this software and associated documentation files (the "Software"), to deal in
@ -27,21 +27,34 @@ SOFTWARE.
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h> #include <stdio.h>
static int theA; static int the_a;
static int theB; static int the_b;
static int theLookahead = EOF; static int look_ahead = EOF;
static int the_x = EOF;
static int the_y = EOF;
/* isAlphanum -- return true if the character is a letter, digit, underscore, static void error(char* string) {
fputs("JSMIN Error: ", stderr);
fputs(string, stderr);
fputc('\n', stderr);
exit(1);
}
/* is_alphanum -- return true if the character is a letter, digit, underscore,
dollar sign, or non-ASCII character. dollar sign, or non-ASCII character.
*/ */
static int static int is_alphanum(int codeunit) {
isAlphanum(int c) return (
{ (codeunit >= 'a' && codeunit <= 'z')
return ((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || || (codeunit >= '0' && codeunit <= '9')
(c >= 'A' && c <= 'Z') || c == '_' || c == '$' || c == '\\' || || (codeunit >= 'A' && codeunit <= 'Z')
c > 126); || codeunit == '_'
|| codeunit == '$'
|| codeunit == '\\'
|| codeunit > 126
);
} }
@ -50,32 +63,28 @@ isAlphanum(int c)
linefeed. linefeed.
*/ */
static int static int get() {
get() int codeunit = look_ahead;
{ look_ahead = EOF;
int c = theLookahead; if (codeunit == EOF) {
theLookahead = EOF; codeunit = getc(stdin);
if (c == EOF) {
c = getc(stdin);
} }
if (c >= ' ' || c == '\n' || c == EOF) { if (codeunit >= ' ' || codeunit == '\n' || codeunit == EOF) {
return c; return codeunit;
} }
if (c == '\r') { if (codeunit == '\r') {
return '\n'; return '\n';
} }
return ' '; return ' ';
} }
/* peek -- get the next character without getting it. /* peek -- get the next character without advancing.
*/ */
static int static int peek() {
peek() look_ahead = get();
{ return look_ahead;
theLookahead = get();
return theLookahead;
} }
@ -83,39 +92,38 @@ peek()
if a '/' is followed by a '/' or '*'. if a '/' is followed by a '/' or '*'.
*/ */
static int static int next() {
next() int codeunit = get();
{ if (codeunit == '/') {
int c = get();
if (c == '/') {
switch (peek()) { switch (peek()) {
case '/': case '/':
for (;;) { for (;;) {
c = get(); codeunit = get();
if (c <= '\n') { if (codeunit <= '\n') {
return c; break;
} }
} }
break;
case '*': case '*':
get(); get();
for (;;) { while (codeunit != ' ') {
switch (get()) { switch (get()) {
case '*': case '*':
if (peek() == '/') { if (peek() == '/') {
get(); get();
return ' '; codeunit = ' ';
} }
break; break;
case EOF: case EOF:
fprintf(stderr, "Error: JSMIN Unterminated comment.\n"); error("Unterminated comment.");
exit(1);
} }
} }
default: break;
return c;
} }
} }
return c; the_y = the_x;
the_x = codeunit;
return codeunit;
} }
@ -123,77 +131,92 @@ next()
1 Output A. Copy B to A. Get the next B. 1 Output A. Copy B to A. Get the next B.
2 Copy B to A. Get the next B. (Delete A). 2 Copy B to A. Get the next B. (Delete A).
3 Get the next B. (Delete B). 3 Get the next B. (Delete B).
action treats a string as a single character. Wow! action treats a string as a single character.
action recognizes a regular expression if it is preceded by ( or , or =. action recognizes a regular expression if it is preceded by the likes of
'(' or ',' or '='.
*/ */
static void static void action(int determined) {
action(int d) switch (determined) {
{
switch (d) {
case 1: case 1:
putc(theA, stdout); putc(the_a, stdout);
if (
(the_y == '\n' || the_y == ' ')
&& (the_a == '+' || the_a == '-' || the_a == '*' || the_a == '/')
&& (the_b == '+' || the_b == '-' || the_b == '*' || the_b == '/')
) {
putc(the_y, stdout);
}
case 2: case 2:
theA = theB; the_a = the_b;
if (theA == '\'' || theA == '"' || theA == '`') { if (the_a == '\'' || the_a == '"' || the_a == '`') {
for (;;) { for (;;) {
putc(theA, stdout); putc(the_a, stdout);
theA = get(); the_a = get();
if (theA == theB) { if (the_a == the_b) {
break; break;
} }
if (theA == '\\') { if (the_a == '\\') {
putc(theA, stdout); putc(the_a, stdout);
theA = get(); the_a = get();
} }
if (theA == EOF) { if (the_a == EOF) {
fprintf(stderr, "Error: JSMIN unterminated string literal."); error("Unterminated string literal.");
exit(1);
} }
} }
} }
case 3: case 3:
theB = next(); the_b = next();
if (theB == '/' && (theA == '(' || theA == ',' || theA == '=' || if (the_b == '/' && (
theA == ':' || theA == '[' || theA == '!' || the_a == '(' || the_a == ',' || the_a == '=' || the_a == ':'
theA == '&' || theA == '|' || theA == '?' || || the_a == '[' || the_a == '!' || the_a == '&' || the_a == '|'
theA == '{' || theA == '}' || theA == ';' || || the_a == '?' || the_a == '+' || the_a == '-' || the_a == '~'
theA == '\n')) { || the_a == '*' || the_a == '/' || the_a == '{' || the_a == '}'
putc(theA, stdout); || the_a == ';'
putc(theB, stdout); )) {
putc(the_a, stdout);
if (the_a == '/' || the_a == '*') {
putc(' ', stdout);
}
putc(the_b, stdout);
for (;;) { for (;;) {
theA = get(); the_a = get();
if (theA == '[') { if (the_a == '[') {
for (;;) { for (;;) {
putc(theA, stdout); putc(the_a, stdout);
theA = get(); the_a = get();
if (theA == ']') { if (the_a == ']') {
break; break;
} }
if (theA == '\\') { if (the_a == '\\') {
putc(theA, stdout); putc(the_a, stdout);
theA = get(); the_a = get();
} }
if (theA == EOF) { if (the_a == EOF) {
fprintf(stderr, error(
"Error: JSMIN unterminated set in Regular Expression literal.\n"); "Unterminated set in Regular Expression literal."
exit(1); );
} }
} }
} else if (theA == '/') { } else if (the_a == '/') {
switch (peek()) {
case '/':
case '*':
error(
"Unterminated set in Regular Expression literal."
);
}
break; break;
} else if (theA =='\\') { } else if (the_a =='\\') {
putc(theA, stdout); putc(the_a, stdout);
theA = get(); the_a = get();
} }
if (theA == EOF) { if (the_a == EOF) {
fprintf(stderr, error("Unterminated Regular Expression literal.");
"Error: JSMIN unterminated Regular Expression literal.\n");
exit(1);
} }
putc(theA, stdout); putc(the_a, stdout);
} }
theB = next(); the_b = next();
} }
} }
} }
@ -205,51 +228,56 @@ action(int d)
Most spaces and linefeeds will be removed. Most spaces and linefeeds will be removed.
*/ */
static void static void jsmin() {
jsmin() if (peek() == 0xEF) {
{ get();
theA = '\n'; get();
get();
}
the_a = '\n';
action(3); action(3);
while (theA != EOF) { while (the_a != EOF) {
switch (theA) { switch (the_a) {
case ' ': case ' ':
if (isAlphanum(theB)) { action(
action(1); is_alphanum(the_b)
} else { ? 1
action(2); : 2
} );
break; break;
case '\n': case '\n':
switch (theB) { switch (the_b) {
case '{': case '{':
case '[': case '[':
case '(': case '(':
case '+': case '+':
case '-': case '-':
case '!':
case '~':
action(1); action(1);
break; break;
case ' ': case ' ':
action(3); action(3);
break; break;
default: default:
if (isAlphanum(theB)) { action(
action(1); is_alphanum(the_b)
} else { ? 1
action(2); : 2
} );
} }
break; break;
default: default:
switch (theB) { switch (the_b) {
case ' ': case ' ':
if (isAlphanum(theA)) { action(
action(1); is_alphanum(the_a)
break; ? 1
} : 3
action(3); );
break; break;
case '\n': case '\n':
switch (theA) { switch (the_a) {
case '}': case '}':
case ']': case ']':
case ')': case ')':
@ -261,11 +289,11 @@ jsmin()
action(1); action(1);
break; break;
default: default:
if (isAlphanum(theA)) { action(
action(1); is_alphanum(the_a)
} else { ? 1
action(3); : 3
} );
} }
break; break;
default: default:
@ -280,9 +308,8 @@ jsmin()
/* main -- Output any command line arguments as comments /* main -- Output any command line arguments as comments
and then minify the input. and then minify the input.
*/ */
extern int
main(int argc, char* argv[]) extern int main(int argc, char* argv[]) {
{
int i; int i;
for (i = 1; i < argc; i += 1) { for (i = 1; i < argc; i += 1) {
fprintf(stdout, "// %s\n", argv[i]); fprintf(stdout, "// %s\n", argv[i]);