diff options
Diffstat (limited to 'vendor/ruby-msg/contrib/rtf2html.c')
| -rw-r--r-- | vendor/ruby-msg/contrib/rtf2html.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/vendor/ruby-msg/contrib/rtf2html.c b/vendor/ruby-msg/contrib/rtf2html.c deleted file mode 100644 index 937e22ff1..000000000 --- a/vendor/ruby-msg/contrib/rtf2html.c +++ /dev/null @@ -1,155 +0,0 @@ -#include <stdio.h> -#define bool int -#define false 0 -#define true 1 - -// RTF/HTML functions -// -------------------- -// -// Sometimes in MAPI, the PR_BODY_HTML property contains the HTML of a message. -// But more usually, the HTML is encoded inside the RTF body (which you get in the -// PR_RTF_COMPRESSED property). These routines concern the decoding of the HTML -// from this RTF body. -// -// An encoded htmlrtf file is a valid RTF document, but which contains additional -// html markup information in its comments, and sometimes contains the equivalent -// rtf markup outside the comments. Therefore, when it is displayed by a plain -// simple RTF reader, the html comments are ignored and only the rtf markup has -// effect. Typically, this rtf markup is not as rich as the html markup would have been. -// But for an html-aware reader (such as the code below), we can ignore all the -// rtf markup, and extract the html markup out of the comments, and get a valid -// html document. -// -// There are actually two kinds of html markup in comments. Most of them are -// prefixed by "\*\htmltagNNN", for some number NNN. But sometimes there's one -// prefixed by "\*\mhtmltagNNN" followed by "\*\htmltagNNN". In this case, -// the two are equivalent, but the m-tag is for a MIME Multipart/Mixed Message -// and contains tags that refer to content-ids (e.g. img src="cid:072344a7") -// while the normal tag just refers to a name (e.g. img src="fred.jpg") -// The code below keeps the m-tag and discards the normal tag. -// If there are any m-tags like this, then the message also contains an -// attachment with a PR_CONTENT_ID property e.g. "072344a7". Actually, -// sometimes the m-tag is e.g. img src="http://outlook/welcome.html" and the -// attachment has a PR_CONTENT_LOCATION "http://outlook/welcome.html" instead -// of a PR_CONTENT_ID. -// -// This code is experimental. It works on my own message archive, of about -// a thousand html-encoded messages, received in Outlook97 and Outlook2000 -// and OutlookXP. But I can't guarantee that it will work on all rtf-encoded -// messages. Indeed, it used to be the case that people would simply stick -// {\fromhtml at the start of an html document, and } at the end, and send -// this as RTF. If someone did this, then it will almost work in my function -// but not quite. (Because I ignore \r and \n, and respect only \par. Thus, -// any linefeeds in the erroneous encoded-html will be ignored.) - - - - - -// ISRTFHTML -- Given an uncompressed RTF body of the message, this -// function tells you whether it encodes some html. -// [in] (buf,*len) indicate the start and length of the uncompressed RTF body. -// [return-value] true or false, for whether it really does encode some html -bool isrtfhtml(const char *buf,unsigned int len) -{ // We look for the words "\fromhtml" somewhere in the file. - // If the rtf encodes text rather than html, then instead - // it will only find "\fromtext". - const char *c; - for (c=buf; c<buf+len; c++) - { if (strncmp(c,"\\from",5)==0) return strncmp(c,"\\fromhtml",9)==0; - } - return false; -} - - - - -// DECODERTFHTML -- Given an uncompressed RTF body of the message, -// and assuming that it contains encoded-html, this function -// turns it onto regular html. -// [in] (buf,*len) indicate the start and length of the uncompressed RTF body. -// [out] the buffer is overwritten with the HTML version, null-terminated, -// and *len indicates the length of this HTML. -// -// Notes: (1) because of how the encoding works, the HTML version is necessarily -// shorter than the encoded version. That's why it's safe for the function to -// place the decoded html in the same buffer that formerly held the encoded stuff. -// (2) Some messages include characters \'XX, where XX is a hexedecimal number. -// This function simply converts this into ASCII. The conversion will only make -// sense if the right code-page is being used. I don't know how rtf specifies which -// code page it wants. -// (3) By experiment, I discovered that \pntext{..} and \liN and \fi-N are RTF -// markup that should be removed. There might be other RTF markup that should -// also be removed. But I don't know what else. -// -void decodertfhtml(char *buf,unsigned int *len) -{ // c -- pointer to where we're reading from - // d -- pointer to where we're writing to. Invariant: d<c - // max -- how far we can read from (i.e. to the end of the original rtf) - // ignore_tag -- stores 'N': after \mhtmlN, we will ignore the subsequent \htmlN. - char *c=buf, *max=buf+*len, *d=buf; int ignore_tag=-1; - // First, we skip forwards to the first \htmltag. - while (c<max && strncmp(c,"{\\*\\htmltag",11)!=0) c++; - // - // Now work through the document. Our plan is as follows: - // * Ignore { and }. These are part of RTF markup. - // * Ignore \htmlrtf...\htmlrtf0. This is how RTF keeps its equivalent markup separate from the html. - // * Ignore \r and \n. The real carriage returns are stored in \par tags. - // * Ignore \pntext{..} and \liN and \fi-N. These are RTF junk. - // * Convert \par and \tab into \r\n and \t - // * Convert \'XX into the ascii character indicated by the hex number XX - // * Convert \{ and \} into { and }. This is how RTF escapes its curly braces. - // * When we get \*\mhtmltagN, keep the tag, but ignore the subsequent \*\htmltagN - // * When we get \*\htmltagN, keep the tag as long as it isn't subsequent to a \*\mhtmltagN - // * All other text should be kept as it is. - while (c<max) - { if (*c=='{') c++; - else if (*c=='}') c++; - else if (strncmp(c,"\\*\\htmltag",10)==0) - { c+=10; int tag=0; while (*c>='0' && *c<='9') {tag=tag*10+*c-'0'; c++;} - if (*c==' ') c++; - if (tag==ignore_tag) {while (c<max && *c!='}') c++; if (*c=='}') c++;} - ignore_tag=-1; - } - else if (strncmp(c,"\\*\\mhtmltag",11)==0) - { c+=11; int tag=0; while (*c>='0' && *c<='9') {tag=tag*10+*c-'0'; c++;} - if (*c==' ') c++; - ignore_tag=tag; - } - else if (strncmp(c,"\\par",4)==0) {strcpy(d,"\r\n"); d+=2; c+=4; if (*c==' ') c++;} - else if (strncmp(c,"\\tab",4)==0) {strcpy(d," "); d+=3; c+=4; if (*c==' ') c++;} - else if (strncmp(c,"\\li",3)==0) - { c+=3; while (*c>='0' && *c<='9') c++; if (*c==' ') c++; - } - else if (strncmp(c,"\\fi-",4)==0) - { c+=4; while (*c>='0' && *c<='9') c++; if (*c==' ') c++; - } - else if (strncmp(c,"\\'",2)==0) - { unsigned int hi=c[2], lo=c[3]; - if (hi>='0' && hi<='9') hi-='0'; else if (hi>='A' && hi<='Z') hi-='A'; else if (hi>='a' && hi<='z') hi-='a'; - if (lo>='0' && lo<='9') lo-='0'; else if (lo>='A' && lo<='Z') lo-='A'; else if (lo>='a' && lo<='z') lo-='a'; - *((unsigned char*)d) = (unsigned char)(hi*16+lo); - c+=4; d++; - } - else if (strncmp(c,"\\pntext",7)==0) {c+=7; while (c<max && *c!='}') c++;} - else if (strncmp(c,"\\htmlrtf",8)==0) - { c++; while (c<max && strncmp(c,"\\htmlrtf0",9)!=0) c++; - if (c<max) c+=9; if (*c==' ') c++; - } - else if (*c=='\r' || *c=='\n') c++; - else if (strncmp(c,"\\{",2)==0) {*d='{'; d++; c+=2;} - else if (strncmp(c,"\\}",2)==0) {*d='}'; d++; c+=2;} - else {*d=*c; c++; d++;} - } - *d=0; d++; - *len = d-buf; -} - - -void main() -{ - unsigned char buf[1024*1024]; - int len = fread(buf, 1, 1024*1024, stdin); - decodertfhtml(buf, &len); - fwrite(buf, 1, len, stdout); -} |