diff options
Diffstat (limited to 'xmlwf/ct.c')
| -rw-r--r-- | xmlwf/ct.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/xmlwf/ct.c b/xmlwf/ct.c new file mode 100644 index 0000000..dd42f5e --- /dev/null +++ b/xmlwf/ct.c @@ -0,0 +1,179 @@ +/* + __ __ _ + ___\ \/ /_ __ __ _| |_ + / _ \\ /| '_ \ / _` | __| + | __// \| |_) | (_| | |_ + \___/_/\_\ .__/ \__,_|\__| + |_| XML parser + + Copyright (c) 1997-2000 Thai Open Source Software Center Ltd + Copyright (c) 2000-2017 Expat development team + Licensed under the MIT license: + + 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 the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to permit + persons to whom the Software is furnished to do so, subject to the + following conditions: + + The above copyright notice and this permission notice shall be included + in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN + NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, + DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +#define CHARSET_MAX 41 + +static const char * +getTok(const char **pp) +{ + enum { inAtom, inString, init, inComment }; + int state = init; + const char *tokStart = 0; + for (;;) { + switch (**pp) { + case '\0': + return 0; + case ' ': + case '\r': + case '\t': + case '\n': + if (state == inAtom) + return tokStart; + break; + case '(': + if (state == inAtom) + return tokStart; + if (state != inString) + state++; + break; + case ')': + if (state > init) + --state; + else if (state != inString) + return 0; + break; + case ';': + case '/': + case '=': + if (state == inAtom) + return tokStart; + if (state == init) + return (*pp)++; + break; + case '\\': + ++*pp; + if (**pp == '\0') + return 0; + break; + case '"': + switch (state) { + case inString: + ++*pp; + return tokStart; + case inAtom: + return tokStart; + case init: + tokStart = *pp; + state = inString; + break; + } + break; + default: + if (state == init) { + tokStart = *pp; + state = inAtom; + } + break; + } + ++*pp; + } + /* not reached */ +} + +/* key must be lowercase ASCII */ + +static int +matchkey(const char *start, const char *end, const char *key) +{ + if (!start) + return 0; + for (; start != end; start++, key++) + if (*start != *key && *start != 'A' + (*key - 'a')) + return 0; + return *key == '\0'; +} + +void +getXMLCharset(const char *buf, char *charset) +{ + const char *next, *p; + + charset[0] = '\0'; + next = buf; + p = getTok(&next); + if (matchkey(p, next, "text")) + strcpy(charset, "us-ascii"); + else if (!matchkey(p, next, "application")) + return; + p = getTok(&next); + if (!p || *p != '/') + return; + p = getTok(&next); + if (matchkey(p, next, "xml")) + isXml = 1; + p = getTok(&next); + while (p) { + if (*p == ';') { + p = getTok(&next); + if (matchkey(p, next, "charset")) { + p = getTok(&next); + if (p && *p == '=') { + p = getTok(&next); + if (p) { + char *s = charset; + if (*p == '"') { + while (++p != next - 1) { + if (*p == '\\') + ++p; + if (s == charset + CHARSET_MAX - 1) { + charset[0] = '\0'; + break; + } + *s++ = *p; + } + *s++ = '\0'; + } + else { + if (next - p > CHARSET_MAX - 1) + break; + while (p != next) + *s++ = *p++; + *s = 0; + break; + } + } + } + } + } + else + p = getTok(&next); + } +} + +int +main(int argc, char **argv) +{ + char buf[CHARSET_MAX]; + getXMLCharset(argv[1], buf); + printf("charset = \"%s\"\n", buf); + return 0; +} |