文件名称:
JSMin（javaScript文件压缩）
开发工具:
文件大小: 11kb
下载次数: 0
上传时间: 2011-04-24
详细说明： 由Douglas Crockford创建的JSMin是一个筛选程序，用于JavaScript文件中删除注释和不必要的空格。这个程序通常能够使文件大小减半，从而节省下载时间。 压缩包里包含了用C写的源码，及可执行程序 由于看到三条评论说没有用，在里我必须说明一下，下面那三个白痴肯定没学过c语言，更没用过c编译好的.exe文件。 以下是c里的源码大家可以先看觉得可用再下 #include #include static int theA; static int theB; static int theLookahead = EOF; /* isAlphanum -- 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); } /* get -- return the next character from stdin. Watch out for lookahead. If the character is a control character, translate it to a space or linefeed. */ static int get() { int c = theLookahead; theLookahead = EOF; if (c == EOF) { c = getc(stdin); } if (c >= ' ' || c == '\n' || c == EOF) { return c; } if (c == '\r') { return '\n'; } return ' '; } /* peek -- get the next character without getting it. */ static int peek() { theLookahead = get(); return theLookahead; } /* next -- get the next character, excluding comments. peek() is used to see if a '/' is followed by a '/' or '*'. */ static int next() { int c = get(); if (c == '/') { switch (peek()) { case '/': for (;;) { c = get(); if (c <= '\n') { return c; } } case '*': get(); for (;;) { switch (get()) { case '*': if (peek() == '/') { get(); return ' '; } break; case EOF: fprintf(stderr, "Error: JSMIN Unterminated comment.\n"); exit(1); } } default: return c; } } return c; } /* action -- do something! What you do is determined by the argument: 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 =. */ static void action(int d) { switch (d) { case 1: putc(theA, stdout); case 2: theA = theB; if (theA == '\'' || theA == '"') { for (;;) { putc(theA, stdout); theA = get(); if (theA == theB) { break; } if (theA == '\\') { putc(theA, stdout); theA = get(); } if (theA == EOF) { fprintf(stderr, "Error: JSMIN unterminated string literal."); exit(1); } } } 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); for (;;) { theA = get(); if (theA == '[') { for (;;) { putc(theA, stdout); theA = get(); if (theA == ']') { break; } if (theA == '\\') { putc(theA, stdout); theA = get(); } if (theA == EOF) { fprintf(stderr, "Error: JSMIN unterminated set in Regular Expression literal.\n"); exit(1); } } } else if (theA == '/') { break; } else if (theA =='\\') { putc(theA, stdout); theA = get(); } if (theA == EOF) { fprintf(stderr, "Error: JSMIN unterminated Regular Expression literal.\n"); exit(1); } putc(theA, stdout); } theB = next(); } } } /* jsmin -- Copy the input to the output, deleting the characters which are insignificant to JavaScript. Comments will be removed. Tabs will be replaced with spaces. Carriage returns will be replaced with linefeeds. Most spaces and linefeeds will be removed. */ static void jsmin() { theA = '\n'; action(3); while (theA != EOF) { switch (theA) { case ' ': if (isAlphanum(theB)) { action(1); } else { action(2); } break; case '\n': switch (theB) { case '{': case '[': case '(': case '+': case '-': action(1); break; case ' ': action(3); break; default: if (isAlphanum(theB)) { action(1); } else { action(2); } } break; default: switch (theB) { case ' ': if (isAlphanum(theA)) { action(1); break; } action(3); break; case '\n': switch (theA) { case '}': case ']': case ')': case '+': case '-': case '"': case '\'': action(1); break; default: if (isAlphanum(theA)) { action(1); } else { action(3); } } break; default: action(1); break; } } } } /* main -- Output any command line arguments as comments and then minify the input. */ extern int main(int argc, char* argv[]) { int i; for (i = 1; i < argc; i += 1) { fprintf(stdout, "// %s\n", argv[i]); } jsmin(); return 0; } ...展开收缩
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