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- /*
- *
- * h t m l . c -- Html support for STk
- *
- * Copyright ⌐ 1993-1996 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
- *
- *
- * Permission to use, copy, and/or distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that both the above copyright notice and this permission notice appear in
- * all copies and derived works. Fees for distribution or use of this
- * software or derived works may only be charged with express written
- * permission of the copyright holder.
- * This software is provided ``as is'' without express or implied warranty.
- *
- *
- *
- * Author: Erick Gallesio [eg@kaolin.unice.fr]
- * Creation date: 1-Sep-1995 23:10
- * Last file update: 16-Jun-1996 20:47
- */
-
- #include <ctype.h>
- #include "stk.h"
- struct char_type {
- char *name;
- unsigned char c;
- };
-
- static struct char_type table [] = {
- {"lt", '<'}, {"gt", '>'}, {"amp", '&'},
- {"quot", '"'},
- {"nbsp", '\xa0'}, {"iexcl", '\xa1'}, {"cent", '\xa2'},
- {"pound", '\xa3'}, {"curren", '\xa4'}, {"yen", '\xa5'},
- {"brvbar", '\xa6'}, {"sect", '\xa7'}, {"uml", '\xa8'},
- {"copy", '\xa9'}, {"ordf", '\xaa'}, {"laquo", '\xab'},
- {"not", '\xac'}, {"shy", '\xad'}, {"reg", '\xae'},
- {"hibar", '\xaf'}, {"deg", '\xb0'}, {"plusmn", '\xb1'},
- {"sup2", '\xb2'}, {"sup3", '\xb3'}, {"acute", '\xb4'},
- {"micro", '\xb5'}, {"para", '\xb6'}, {"middot", '\xb7'},
- {"cedil", '\xb8'}, {"sup1", '\xb9'}, {"ordm", '\xba'},
- {"raquo", '\xbb'}, {"frac14", '\xbc'}, {"frac12", '\xbd'},
- {"frac34", '\xbe'}, {"iquest", '\xbf'}, {"Agrave", '\xc0'},
- {"Aacute", '\xc1'}, {"Acirc", '\xc2'}, {"Atilde", '\xc3'},
- {"Auml", '\xc4'}, {"Aring", '\xc5'}, {"AElig", '\xc6'},
- {"Ccedil", '\xc7'}, {"Egrave", '\xc8'}, {"Eacute", '\xc9'},
- {"Ecirc", '\xca'}, {"Euml", '\xcb'}, {"Igrave", '\xcc'},
- {"Iacute", '\xcd'}, {"Icirc", '\xce'}, {"Iuml", '\xcf'},
- {"ETH", '\xd0'}, {"Ntilde", '\xd1'}, {"Ograve", '\xd2'},
- {"Oacute", '\xd3'}, {"Ocirc", '\xd4'}, {"Otilde", '\xd5'},
- {"Ouml", '\xd6'}, {"times", '\xd7'}, {"Oslash", '\xd8'},
- {"Ugrave", '\xd9'}, {"Uacute", '\xda'}, {"Ucirc", '\xdb'},
- {"Uuml", '\xdc'}, {"Yacute", '\xdd'}, {"THORN", '\xde'},
- {"szlig", '\xdf'}, {"agrave", '\xe0'}, {"aacute", '\xe1'},
- {"acirc", '\xe2'}, {"atilde", '\xe3'}, {"auml", '\xe4'},
- {"aring", '\xe5'}, {"aelig", '\xe6'}, {"ccedil", '\xe7'},
- {"egrave", '\xe8'}, {"eacute", '\xe9'}, {"ecirc", '\xea'},
- {"euml", '\xeb'}, {"igrave", '\xec'}, {"iacute", '\xed'},
- {"icirc", '\xee'}, {"iuml", '\xef'}, {"eth", '\xf0'},
- {"ntilde", '\xf1'}, {"ograve", '\xf2'}, {"oacute", '\xf3'},
- {"ocirc", '\xf4'}, {"otilde", '\xf5'}, {"ouml", '\xf6'},
- {"divide", '\xf7'}, {"oslash", '\xf8'}, {"ugrave", '\xf9'},
- {"uacute", '\xfa'}, {"ucirc", '\xfb'}, {"uuml", '\xfc'},
- {"yacute", '\xfd'}, {"thorn", '\xfe'}, {"yuml", '\xff'},
- {"", 0}};
-
- static void skip_spaces(FILE *f)
- {
- int c;
-
- for (;;) {
- c = Getc(f);
- if (c == EOF) break;
- if (!isspace(c)) {
- Ungetc(c, f);
- break;
- }
- }
- }
-
- static PRIMITIVE STk_html_next_token(SCM iport)
- {
- /* Return next HTML token */
- char ch, *t, token[256];
- int c;
- Tcl_DString dStr1, dStr2;
- SCM z;
- FILE *f;
-
- if (!INP(iport)) Err("%Html:next-token: bad port", iport);
-
- f = PORT_FILE(iport);
-
- if (Eof(f) || ((c = Getc(f)) == EOF)) return STk_eof_object;
-
- Tcl_DStringInit(&dStr1); Tcl_DStringInit(&dStr2);
-
- if (c == '<') {
- skip_spaces(f);
- while ((c = Getc(f)) != EOF && (c != '>') && (c != ' ') && (c != '\t')) {
- ch = tolower(c);
- Tcl_DStringAppend(&dStr1, &ch, 1);
- }
- if (c == ' ' || c == '\t') {
- /* Read the argument */
- skip_spaces(f);
- while ((c = Getc(f)) != EOF && (c != '>')) {
- ch = c;
- Tcl_DStringAppend(&dStr2, &ch, 1);
- }
- }
-
- if (Tcl_DStringValue(&dStr1)[0] == '\0')
- z = STk_makestring("<>");
- else
- if (Tcl_DStringValue(&dStr1)[0]=='/' && Tcl_DStringValue(&dStr1)[1] == '\0')
- z = STk_makestring("</>");
- else
- z = Cons(STk_makestring(Tcl_DStringValue(&dStr1)),
- STk_makestring(Tcl_DStringValue(&dStr2)));
- }
- else {
- if (c == '&') {
- t = token;
- while ((c = Getc(f)) != EOF && c != ';' && isalpha(c)) *t++ = c;
- *t = 0;
-
- if (c != ';') Ungetc(c, f);
-
- /* Search the given token in the translation table */
- {
- int i;
-
- for (i = 0; table[i].c; i++)
- if (strcmp(token, table[i].name) == 0) {
- Tcl_DStringAppend(&dStr1, &table[i].c, 1);
- break;
- }
- if (!table[i].c) /* Not found */ Tcl_DStringAppend(&dStr1, token, -1);
- }
- }
- else {
- do {
- if (c == '<' || c == '&') {
- Ungetc(c, f);
- break;
- }
- ch = c;
- Tcl_DStringAppend(&dStr1, &ch, 1);
- }
- while ((c = Getc(f)) != EOF);
- }
- z = STk_makestring(Tcl_DStringValue(&dStr1));
- }
-
- Tcl_DStringFree(&dStr1); Tcl_DStringFree(&dStr2);
- return z;
- }
-
-
- static PRIMITIVE STk_html_clean_spaces(SCM str, SCM ignore_spaces)
- {
- Tcl_DString dString;
- char c, *s;
- int only_spaces = TRUE;
- SCM z;
-
- if (!STRINGP(str)) Err("%html:clean-spaces: bad string", str);
-
- Tcl_DStringInit(&dString);
- for (s = CHARS(str); c = *s; s++) {
- if (c == ' ' || c == '\n' || c == '\t' || c == '\r') {
- if (ignore_spaces == Ntruth) {
- Tcl_DStringAppend(&dString, " ", 1);
- ignore_spaces = Truth;
- }
- }
- else {
- Tcl_DStringAppend(&dString, &c, 1);
- only_spaces = FALSE;
- ignore_spaces = Ntruth;
- }
- }
- z = Cons(STk_makestring(Tcl_DStringValue(&dString)),
- only_spaces ? Truth: Ntruth);
- Tcl_DStringFree(&dString);
-
- return z;
- }
-
- PRIMITIVE STk_init_html(void)
- {
- STk_add_new_primitive("%html:clean-spaces", tc_subr_2, STk_html_clean_spaces);
- STk_add_new_primitive("%html:next-token", tc_subr_1, STk_html_next_token);
- return UNDEFINED;
- }
-