From 42b9c8089e161add7fc8b244f999a7e90fc9e7ea Mon Sep 17 00:00:00 2001
From: rswindell <>
Date: Mon, 10 Mar 2003 11:54:04 +0000
Subject: [PATCH] Created global method: html_escape() which converts a passed
buffer to HTML escaped text (using standard HTML character entities) -
optionally converting IBM ex-ASCII chars too.
---
src/sbbs3/js_global.c | 210 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 209 insertions(+), 1 deletion(-)
diff --git a/src/sbbs3/js_global.c b/src/sbbs3/js_global.c
index dd04a47111..7ac625fbb6 100644
--- a/src/sbbs3/js_global.c
+++ b/src/sbbs3/js_global.c
@@ -479,6 +479,211 @@ js_lfexpand(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
return(JS_TRUE);
}
+/* This table is used to convert between IBM ex-ASCII and HTML character entities */
+static const char* exasctbl[128] = {
+ "Ccedil" /* 128 C, cedilla */
+ ,"uuml" /* 129 u, umlaut */
+ ,"eacute" /* 130 e, acute accent */
+ ,"acirc" /* 131 a, circumflex accent */
+ ,"auml" /* 132 a, umlaut */
+ ,"agrave" /* 133 a, grave accent */
+ ,"aring" /* 134 a, ring */
+ ,"ccedil" /* 135 c, cedilla */
+ ,"ecirc" /* 136 e, circumflex accent */
+ ,"euml" /* 137 e, umlaut */
+ ,"egrave" /* 138 e, grave accent */
+ ,"iuml" /* 139 i, umlaut */
+ ,"icrc" /* 140 i, circumflex accent */
+ ,"igrave" /* 141 i, grave accent */
+ ,"Auml" /* 142 A, umlaut */
+ ,"Aring" /* 143 A, ring */
+ ,"Eacute" /* 144 E, acute accent */
+ ,"aelig" /* 145 ae ligature */
+ ,"AElig" /* 146 AE ligature */
+ ,"ocirc" /* 147 o, circumflex accent */
+ ,"ouml" /* 148 o, umlaut */
+ ,"ograve" /* 149 o, grave accent */
+ ,"ucirc" /* 150 u, circumflex accent */
+ ,"ugrave" /* 151 u, grave accent */
+ ,"yuml" /* 152 y, umlaut */
+ ,"Ouml" /* 153 O, umlaut */
+ ,"Uuml" /* 154 U, umlaut */
+ ,"cent" /* 155 Cent sign */
+ ,"pound" /* 156 Pound sign */
+ ,"yen" /* 157 Yen sign */
+ ,"#8359" /* 158 Pt (unicode) */
+ ,"#131" /* 159 Florin (non-standard) */
+ ,"aacute" /* 160 a, acute accent */
+ ,"iacute" /* 161 i, acute accent */
+ ,"oacute" /* 162 o, acute accent */
+ ,"uacute" /* 163 u, acute accent */
+ ,"ntilde" /* 164 n, tilde */
+ ,"Ntilde" /* 165 N, tilde */
+ ,"ordf" /* 166 Feminine ordinal */
+ ,"ordm" /* 167 Masculine ordinal */
+ ,"iquest" /* 168 Inverted question mark */
+ ,"#8976" /* 169 Inverse "Not sign" (unicode) */
+ ,"not" /* 170 Not sign */
+ ,"frac12" /* 171 Fraction one-half */
+ ,"frac14" /* 172 Fraction one-fourth */
+ ,"iexcl" /* 173 Inverted exclamation point */
+ ,"laquo" /* 174 Left angle quote */
+ ,"raquo" /* 175 Right angle quote */
+ ,"#9617" /* 176 drawing symbol (unicode) */
+ ,"#9618" /* 177 drawing symbol (unicode) */
+ ,"#9619" /* 178 drawing symbol (unicode) */
+ ,"#9474" /* 179 drawing symbol (unicode) */
+ ,"#9508" /* 180 drawing symbol (unicode) */
+ ,"#9569" /* 181 drawing symbol (unicode) */
+ ,"#9570" /* 182 drawing symbol (unicode) */
+ ,"#9558" /* 183 drawing symbol (unicode) */
+ ,"#9557" /* 184 drawing symbol (unicode) */
+ ,"#9571" /* 185 drawing symbol (unicode) */
+ ,"#9553" /* 186 drawing symbol (unicode) */
+ ,"#9559" /* 187 drawing symbol (unicode) */
+ ,"#9565" /* 188 drawing symbol (unicode) */
+ ,"#9564" /* 189 drawing symbol (unicode) */
+ ,"#9563" /* 190 drawing symbol (unicode) */
+ ,"#9488" /* 191 drawing symbol (unicode) */
+ ,"#9492" /* 192 drawing symbol (unicode) */
+ ,"#9524" /* 193 drawing symbol (unicode) */
+ ,"#9516" /* 194 drawing symbol (unicode) */
+ ,"#9500" /* 195 drawing symbol (unicode) */
+ ,"#9472" /* 196 drawing symbol (unicode) */
+ ,"#9532" /* 197 drawing symbol (unicode) */
+ ,"#9566" /* 198 drawing symbol (unicode) */
+ ,"#9567" /* 199 drawing symbol (unicode) */
+ ,"#9562" /* 200 drawing symbol (unicode) */
+ ,"#9556" /* 201 drawing symbol (unicode) */
+ ,"#9577" /* 202 drawing symbol (unicode) */
+ ,"#9574" /* 203 drawing symbol (unicode) */
+ ,"#9568" /* 204 drawing symbol (unicode) */
+ ,"#9552" /* 205 drawing symbol (unicode) */
+ ,"#9580" /* 206 drawing symbol (unicode) */
+ ,"#9575" /* 207 drawing symbol (unicode) */
+ ,"#9576" /* 208 drawing symbol (unicode) */
+ ,"#9572" /* 209 drawing symbol (unicode) */
+ ,"#9573" /* 210 drawing symbol (unicode) */
+ ,"#9561" /* 211 drawing symbol (unicode) */
+ ,"#9560" /* 212 drawing symbol (unicode) */
+ ,"#9554" /* 213 drawing symbol (unicode) */
+ ,"#9555" /* 214 drawing symbol (unicode) */
+ ,"#9579" /* 215 drawing symbol (unicode) */
+ ,"#9578" /* 216 drawing symbol (unicode) */
+ ,"#9496" /* 217 drawing symbol (unicode) */
+ ,"#9484" /* 218 drawing symbol (unicode) */
+ ,"#9608" /* 219 drawing symbol (unicode) */
+ ,"#9604" /* 220 drawing symbol (unicode) */
+ ,"#9612" /* 221 drawing symbol (unicode) */
+ ,"#9616" /* 222 drawing symbol (unicode) */
+ ,"#9600" /* 223 drawing symbol (unicode) */
+ ,"#945" /* 224 alpha symbol */
+ ,"szlig" /* 225 sz ligature (beta symbol) */
+ ,"#915" /* 226 omega symbol */
+ ,"#960" /* 227 pi symbol*/
+ ,"#931" /* 228 epsilon symbol */
+ ,"#963" /* 229 o with stick */
+ ,"micro" /* 230 Micro sign (Greek mu) */
+ ,"#964" /* 231 greek char? */
+ ,"#934" /* 232 greek char? */
+ ,"#920" /* 233 greek char? */
+ ,"#937" /* 234 greek char? */
+ ,"#948" /* 235 greek char? */
+ ,"#8734" /* 236 infinity symbol (unicode) */
+ ,"oslash" /* 237 o, slash (also #966?) */
+ ,"#949" /* 238 rounded E */
+ ,"#8745" /* 239 unside down U (unicode) */
+ ,"#8801" /* 240 drawing symbol (unicode) */
+ ,"plusmn" /* 241 Plus or minus */
+ ,"#8805" /* 242 drawing symbol (unicode) */
+ ,"#8804" /* 243 drawing symbol (unicode) */
+ ,"#8992" /* 244 drawing symbol (unicode) */
+ ,"#8993" /* 245 drawing symbol (unicode) */
+ ,"divide" /* 246 Division sign */
+ ,"#8776" /* 247 two squiggles (unicode) */
+ ,"deg" /* 248 Degree sign */
+ ,"#8729" /* 249 drawing symbol (unicode) */
+ ,"middot" /* 250 Middle dot */
+ ,"#8730" /* 251 check mark (unicode) */
+ ,"#8319" /* 252 superscript n (unicode) */
+ ,"sup2" /* 253 superscript 2 */
+ ,"#9632" /* 254 drawing symbol (unicode) */
+ ,"nbsp" /* 255 non-printing char */
+};
+
+static JSBool
+js_html_escape(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+ ulong i,j;
+ char* inbuf;
+ char* outbuf;
+ JSBool exascii=JS_FALSE;
+ JSString* js_str;
+
+ if(!JSVAL_IS_STRING(argv[0])) {
+ JS_ReportError(cx,nostringarg);
+ return(JS_FALSE);
+ }
+
+ if((inbuf=JS_GetStringBytes(JSVAL_TO_STRING(argv[0])))==NULL)
+ return(JS_FALSE);
+
+ if(argc>1 && JSVAL_IS_BOOLEAN(argv[1]))
+ exascii=JSVAL_TO_BOOLEAN(argv[1]);
+
+ if((outbuf=(char*)malloc(strlen(inbuf)*10))==NULL)
+ return(JS_FALSE);
+
+ for(i=j=0;inbuf[i];i++) {
+ switch(inbuf[i]) {
+ case TAB:
+ case LF:
+ case CR:
+ j+=sprintf(outbuf+j,"&#%03u;",inbuf[i]);
+ break;
+ case '"':
+ j+=sprintf(outbuf+j,""");
+ break;
+ case '&':
+ j+=sprintf(outbuf+j,"&qmp;");
+ break;
+ case '<':
+ j+=sprintf(outbuf+j,"<");
+ break;
+ case '>':
+ j+=sprintf(outbuf+j,">");
+ break;
+ case 15: /* Ctrl-O, General currency symbol */
+ j+=sprintf(outbuf+j,"¤");
+ break;
+ case 20: /* Ctrl-T, Paragraph sign */
+ j+=sprintf(outbuf+j,"¶");
+ break;
+ case 21: /* Ctrl-U, Section sign */
+ j+=sprintf(outbuf+j,"§");
+ break;
+ default:
+ if(inbuf[i]>' ' && inbuf[i]<DEL)
+ outbuf[j++]=inbuf[i];
+ else if(exascii && inbuf[i]&0x80) {
+ j+=sprintf(outbuf+j,"&%s;",exasctbl[(int)(inbuf[i]^0x80)]);
+ }
+ else if(inbuf[i]>=' ') /* strip unknown control chars */
+ j+=sprintf(outbuf+j,"&#%03u;",inbuf[i]);
+ break;
+ }
+ }
+ outbuf[j]=0;
+
+ js_str = JS_NewStringCopyZ(cx, outbuf);
+ free(outbuf);
+ if(js_str==NULL)
+ return(JS_FALSE);
+
+ *rval = STRING_TO_JSVAL(js_str);
+ return(JS_TRUE);
+}
+
static JSBool
js_truncsp(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
@@ -909,7 +1114,10 @@ static jsMethodSpec js_global_functions[] = {
},
{"format", js_format, 1, JSTYPE_STRING, JSDOCSTR("string format [,args]")
,JSDOCSTR("return a formatted string (ala sprintf)")
- },
+ },
+ {"html_escape", js_html_escape, 1, JSTYPE_STRING, JSDOCSTR("string text [,bool ex_ascii]")
+ ,JSDOCSTR("return an HTML escaped text buffer (using standard HTML character entities), optionally escaping IBM extended-ASCII characters")
+ },
{0}
};
--
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