From: Howard Su Date: Sat, 29 Feb 2020 15:30:15 +0000 (+0800) Subject: luci-base: Import latest version of jsmin X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=refs%2Fpull%2F3697%2Fhead;p=oweals%2Fluci.git luci-base: Import latest version of jsmin Signed-off-by: Howard Su --- diff --git a/modules/luci-base/src/jsmin.c b/modules/luci-base/src/jsmin.c index d23718df3..3dc613eb8 100644 --- a/modules/luci-base/src/jsmin.c +++ b/modules/luci-base/src/jsmin.c @@ -1,7 +1,7 @@ /* 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 this software and associated documentation files (the "Software"), to deal in @@ -27,21 +27,34 @@ SOFTWARE. #include #include -static int theA; -static int theB; -static int theLookahead = EOF; +static int the_a; +static int the_b; +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. */ -static int -isAlphanum(int c) -{ - return ((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || - (c >= 'A' && c <= 'Z') || c == '_' || c == '$' || c == '\\' || - c > 126); +static int is_alphanum(int codeunit) { + return ( + (codeunit >= 'a' && codeunit <= 'z') + || (codeunit >= '0' && codeunit <= '9') + || (codeunit >= 'A' && codeunit <= 'Z') + || codeunit == '_' + || codeunit == '$' + || codeunit == '\\' + || codeunit > 126 + ); } @@ -50,32 +63,28 @@ isAlphanum(int c) linefeed. */ -static int -get() -{ - int c = theLookahead; - theLookahead = EOF; - if (c == EOF) { - c = getc(stdin); +static int get() { + int codeunit = look_ahead; + look_ahead = EOF; + if (codeunit == EOF) { + codeunit = getc(stdin); } - if (c >= ' ' || c == '\n' || c == EOF) { - return c; + if (codeunit >= ' ' || codeunit == '\n' || codeunit == EOF) { + return codeunit; } - if (c == '\r') { + if (codeunit == '\r') { return '\n'; } return ' '; } -/* peek -- get the next character without getting it. +/* peek -- get the next character without advancing. */ -static int -peek() -{ - theLookahead = get(); - return theLookahead; +static int peek() { + look_ahead = get(); + return look_ahead; } @@ -83,39 +92,38 @@ peek() if a '/' is followed by a '/' or '*'. */ -static int -next() -{ - int c = get(); - if (c == '/') { +static int next() { + int codeunit = get(); + if (codeunit == '/') { switch (peek()) { case '/': for (;;) { - c = get(); - if (c <= '\n') { - return c; + codeunit = get(); + if (codeunit <= '\n') { + break; } } + break; case '*': get(); - for (;;) { + while (codeunit != ' ') { switch (get()) { case '*': if (peek() == '/') { get(); - return ' '; + codeunit = ' '; } break; case EOF: - fprintf(stderr, "Error: JSMIN Unterminated comment.\n"); - exit(1); + error("Unterminated comment."); } } - default: - return c; + break; } } - 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. 2 Copy B to A. Get the next B. (Delete A). 3 Get the next B. (Delete B). - action treats a string as a single character. Wow! - action recognizes a regular expression if it is preceded by ( or , or =. + action treats a string as a single character. + action recognizes a regular expression if it is preceded by the likes of + '(' or ',' or '='. */ -static void -action(int d) -{ - switch (d) { +static void action(int determined) { + switch (determined) { 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: - theA = theB; - if (theA == '\'' || theA == '"' || theA == '`') { + the_a = the_b; + if (the_a == '\'' || the_a == '"' || the_a == '`') { for (;;) { - putc(theA, stdout); - theA = get(); - if (theA == theB) { + putc(the_a, stdout); + the_a = get(); + if (the_a == the_b) { break; } - if (theA == '\\') { - putc(theA, stdout); - theA = get(); + if (the_a == '\\') { + putc(the_a, stdout); + the_a = get(); } - if (theA == EOF) { - fprintf(stderr, "Error: JSMIN unterminated string literal."); - exit(1); + if (the_a == EOF) { + error("Unterminated string literal."); } } } case 3: - theB = next(); - if (theB == '/' && (theA == '(' || theA == ',' || theA == '=' || - theA == ':' || theA == '[' || theA == '!' || - theA == '&' || theA == '|' || theA == '?' || - theA == '{' || theA == '}' || theA == ';' || - theA == '\n')) { - putc(theA, stdout); - putc(theB, stdout); + the_b = next(); + if (the_b == '/' && ( + the_a == '(' || the_a == ',' || the_a == '=' || the_a == ':' + || the_a == '[' || the_a == '!' || the_a == '&' || the_a == '|' + || the_a == '?' || the_a == '+' || the_a == '-' || the_a == '~' + || the_a == '*' || the_a == '/' || the_a == '{' || the_a == '}' + || the_a == ';' + )) { + putc(the_a, stdout); + if (the_a == '/' || the_a == '*') { + putc(' ', stdout); + } + putc(the_b, stdout); for (;;) { - theA = get(); - if (theA == '[') { + the_a = get(); + if (the_a == '[') { for (;;) { - putc(theA, stdout); - theA = get(); - if (theA == ']') { + putc(the_a, stdout); + the_a = get(); + if (the_a == ']') { break; } - if (theA == '\\') { - putc(theA, stdout); - theA = get(); + if (the_a == '\\') { + putc(the_a, stdout); + the_a = get(); } - if (theA == EOF) { - fprintf(stderr, - "Error: JSMIN unterminated set in Regular Expression literal.\n"); - exit(1); + if (the_a == EOF) { + error( + "Unterminated set in Regular Expression literal." + ); } } - } else if (theA == '/') { + } else if (the_a == '/') { + switch (peek()) { + case '/': + case '*': + error( + "Unterminated set in Regular Expression literal." + ); + } break; - } else if (theA =='\\') { - putc(theA, stdout); - theA = get(); + } else if (the_a =='\\') { + putc(the_a, stdout); + the_a = get(); } - if (theA == EOF) { - fprintf(stderr, - "Error: JSMIN unterminated Regular Expression literal.\n"); - exit(1); + if (the_a == EOF) { + error("Unterminated Regular Expression literal."); } - 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. */ -static void -jsmin() -{ - theA = '\n'; +static void jsmin() { + if (peek() == 0xEF) { + get(); + get(); + get(); + } + the_a = '\n'; action(3); - while (theA != EOF) { - switch (theA) { + while (the_a != EOF) { + switch (the_a) { case ' ': - if (isAlphanum(theB)) { - action(1); - } else { - action(2); - } + action( + is_alphanum(the_b) + ? 1 + : 2 + ); break; case '\n': - switch (theB) { + switch (the_b) { case '{': case '[': case '(': case '+': case '-': + case '!': + case '~': action(1); break; case ' ': action(3); break; default: - if (isAlphanum(theB)) { - action(1); - } else { - action(2); - } + action( + is_alphanum(the_b) + ? 1 + : 2 + ); } break; default: - switch (theB) { + switch (the_b) { case ' ': - if (isAlphanum(theA)) { - action(1); - break; - } - action(3); + action( + is_alphanum(the_a) + ? 1 + : 3 + ); break; case '\n': - switch (theA) { + switch (the_a) { case '}': case ']': case ')': @@ -261,11 +289,11 @@ jsmin() action(1); break; default: - if (isAlphanum(theA)) { - action(1); - } else { - action(3); - } + action( + is_alphanum(the_a) + ? 1 + : 3 + ); } break; default: @@ -280,9 +308,8 @@ jsmin() /* main -- Output any command line arguments as comments and then minify the input. */ -extern int -main(int argc, char* argv[]) -{ + +extern int main(int argc, char* argv[]) { int i; for (i = 1; i < argc; i += 1) { fprintf(stdout, "// %s\n", argv[i]);