--- /dev/null
+/* This file is part of the Project Athena Zephyr Notification System.
+ * It is one of the source files comprising zwgc, the Zephyr WindowGram
+ * client.
+ *
+ * Created by: Marc Horowitz <marc@athena.mit.edu>
+ *
+ * $Id: formatter.c,v 1.15 1999/01/22 23:20:20 ghudson Exp $
+ *
+ * Copyright (c) 1989 by the Massachusetts Institute of Technology.
+ * For copying and distribution information, see the file
+ * "mit-copyright.h".
+ */
+
+#include <sysdep.h>
+
+#if (!defined(lint) && !defined(SABER))
+static const char rcsid_formatter_c[] = "$Id: formatter.c,v 1.15 1999/01/22 23:20:20 ghudson Exp $";
+#endif
+
+#include <zephyr/mit-copyright.h>
+#include <zephyr/zephyr.h>
+
+#include "new_memory.h"
+#include "char_stack.h"
+#include "string_dictionary.h"
+#include "formatter.h"
+#include "text_operations.h"
+
+#if !defined(__STDC__) && !defined(const)
+#define const
+#endif
+
+static int pure_text_length(), env_length();
+
+#ifdef notdef
+static character_class atsign_set = { /* '@' = 0x40 */
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+ };
+#endif
+
+static const character_class paren_set = { /* '(' = 0x28, ')' = 0x29 */
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+ };
+
+static const character_class sbracket_set = { /* '[' = 0x5b, ']' = 0x5d */
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+ };
+
+static const character_class abracket_set = { /* '<' = 0x3c, '>' = 0x3e */
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+ };
+
+static const character_class cbracket_set = { /* '{' = 0x7b, '}' = 0x7d */
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+ };
+
+static const character_class allbracket_set = {
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+ };
+
+static const character_class allmaskable_set = {
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
+ 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+ };
+
+static char brackets[]="()<>[]{}@";
+static char *openbracket[]={"@<","@<","@[","@[","@{","@{","@(","@(","@("};
+static char *closebracket[]={">",">","]","]","}","}",")",")",")"};
+
+static int not_contains(str, set)
+ string str;
+ const character_class set;
+{
+ while (*str && ! set[*str]) str++;
+ return (! *str);
+}
+
+static int pure_text_length(text,terminator)
+ char *text;
+ char terminator;
+{
+ int len=0;
+
+ while (1) {
+ while (*text!='@' && *text!=terminator && *text) {
+ text++;
+ len++;
+ }
+
+ if (*text!='@')
+ return(len);
+
+ if (*(text+1)=='@') {
+ text++;
+ len++;
+ } else if (env_length(text+1) != -1)
+ return(len);
+
+ text++;
+ len++;
+ }
+}
+
+static char otherside(opener)
+char opener;
+{
+ switch (opener) {
+ case '(':
+ return(')');
+ case '{':
+ return('}');
+ case '[':
+ return(']');
+ case '<':
+ return('>');
+ }
+
+#ifdef DEBUG
+ abort();
+#endif
+}
+
+/* the char * that str points to is free'd by this function.
+ * if you want to keep it, save it yourself
+ */
+string verbatim(str, bracketsonly)
+ string str;
+ int bracketsonly;
+{
+ char *temp,*temp2;
+ int bracketnum,len;
+
+ if (strlen(str) == pure_text_length(str,0)) {
+ /* No environments, so consider the fast-and-easy methods */
+
+ if (not_contains(str,allbracket_set)) {
+ temp = string_Copy(str);
+ free(str);
+ return(temp);
+ }
+
+ if (not_contains(str,abracket_set)) {
+ temp=(char *) malloc((len=strlen(str))+4);
+ temp[0]='@';
+ temp[1]='<';
+ (void) memcpy(temp+2,str,len);
+ temp[len+2]='>';
+ temp[len+3]='\0';
+ free(str);
+ return(temp);
+ }
+ if (not_contains(str,sbracket_set)) {
+ temp=(char *) malloc((len=strlen(str))+4);
+ temp[0]='@';
+ temp[1]='[';
+ (void) memcpy(temp+2,str,len);
+ temp[len+2]=']';
+ temp[len+3]='\0';
+ free(str);
+ return(temp);
+ }
+ if (not_contains(str,cbracket_set)) {
+ temp=(char *) malloc((len=strlen(str))+4);
+ temp[0]='@';
+ temp[1]='{';
+ (void) memcpy(temp+2,str,len);
+ temp[len+2]='}';
+ temp[len+3]='\0';
+ free(str);
+ return(temp);
+ }
+ if (not_contains(str,paren_set)) {
+ temp=(char *) malloc((len=strlen(str))+4);
+ temp[0]='@';
+ temp[1]='(';
+ (void) memcpy(temp+2,str,len);
+ temp[len+2]=')';
+ temp[len+3]='\0';
+ free(str);
+ return(temp);
+ }
+ }
+
+ temp=lbreak(&str,bracketsonly?allbracket_set:allmaskable_set);
+ while(*str) {
+ bracketnum=(int) (strchr(brackets,str[0])-brackets);
+ temp=string_Concat2(temp,openbracket[bracketnum]);
+ temp=string_Concat2(temp,temp2=lany(&str," "));
+ free(temp2);
+ temp=string_Concat2(temp,closebracket[bracketnum]);
+ temp=string_Concat2(temp,temp2=lbreak(&str,bracketsonly?
+ allbracket_set:allmaskable_set));
+ free(temp2);
+ }
+ free(str); /* str is "" at this point, anyway */
+
+ return(temp);
+}
+
+/* text points to beginning of text string. return value is
+ length of string, up to but not including the passed terminator
+ or the default terminator \0. The text will not be modified,
+ and @@ will be counted twice */
+
+string protect(str)
+ string str;
+{
+ string temp,temp2,temp3;
+ int len,templen;
+ char_stack chs;
+ char tos;
+
+ temp = string_Copy("");
+ templen = 1;
+ chs = char_stack_create();
+
+ while(*str) {
+ tos = (char_stack_empty(chs)?0:char_stack_top(chs));
+
+ if (*str == tos) {
+ /* if the character is the next terminator */
+
+ temp = (char *) realloc(temp,++templen);
+ temp[templen-2] = *str++;
+ char_stack_pop(chs);
+ temp[templen-1] = '\0';
+ } else if (len = pure_text_length(str,tos)) {
+ if (tos) {
+ /* if the block is text in an environment, just copy it */
+
+ temp2 = string_CreateFromData(str,len);
+ str += len;
+ temp = string_Concat2(temp,temp2);
+ templen += len;
+ free(temp2);
+ } else {
+ /* if the block is top level text, verbatim brackets only
+ (not @'s) and add text to temp */
+
+ temp2 = string_CreateFromData(str,len);
+ str += len;
+ temp3 = verbatim(temp2,1);
+ temp = string_Concat2(temp,temp3);
+ templen += strlen(temp3);
+ free(temp3);
+ }
+ } else {
+ /* if the block is an environment, copy it, push delimiter */
+
+ len = env_length(str+1);
+ char_stack_push(chs,otherside(str[len+1]));
+ len += 2;
+ temp2 = string_CreateFromData(str,len);
+ str += len;
+ temp = string_Concat2(temp,temp2);
+ templen += len;
+ free(temp2);
+ }
+ }
+ /* all blocks have been copied. */
+
+ while (!char_stack_empty(chs)) {
+ temp = (char *) realloc(temp,++templen);
+ temp[templen-2] = char_stack_top(chs);
+ char_stack_pop(chs);
+ }
+ temp[templen-1] = '\0';
+
+ return(temp);
+}
+
+/* str points to a string. return value is another string
+ which is the original with all styles removed. */
+string stylestrip(str)
+ string str;
+{
+ int templen = 0, otherchar;
+ char *temp = (char *) malloc(string_Length(str) + 1);
+ char_stack chs;
+ string ostr = str;
+
+ chs = char_stack_create();
+
+ while (*str) {
+ if (*str == '@') {
+ int len = env_length(str + 1);
+ if (len != -1) {
+ otherchar = 0;
+ if ((len == 4 && !strncasecmp(str + 1, "font", 4))
+ || (len == 5 && !strncasecmp(str + 1, "color", 5)))
+ otherchar = 0x80;
+ otherchar |= otherside(str[len + 1]);
+ char_stack_push(chs, otherchar);
+ str += len + 2;
+ continue;
+ }
+ }
+ if (!char_stack_empty(chs) && *str == (char_stack_top(chs) & 0x7f)) {
+ char_stack_pop(chs);
+ str++;
+ continue;
+ }
+ if (!char_stack_empty(chs) && (char_stack_top(chs) & 0x80))
+ str++;
+ else
+ temp[templen++] = *str++;
+ }
+ temp[templen] = 0;
+
+ while (!char_stack_empty(chs))
+ char_stack_pop(chs);
+ free(ostr);
+
+ return(temp);
+}
+
+void free_desc(desc)
+ desctype *desc;
+{
+ desctype *next_desc;
+
+ while (desc->code != DT_EOF) {
+ next_desc = desc->next;
+ free(desc);
+ desc = next_desc;
+ }
+ free(desc);
+}
+
+/* text points to beginning of possible env name. return value is
+ length of env name, not including @ or opener, or -1 if not a
+ possible env name. */
+static int env_length(text)
+ char *text;
+{
+ int len=0;
+
+ while (*text && (isalnum(*text) || *text=='_')) {
+ text++;
+ len++;
+ }
+
+ if ((*text=='(') || (*text=='{') || (*text=='[') || (*text=='<'))
+ return(len);
+ else
+ return(-1);
+}
+
+/* text points to beginning of text string. return value is
+ length of string, up to but not including the passed terminator
+ or the default terminators \0 \n @. This can modify text, and 0
+ is a valid return value. */
+static int text_length(text,terminator)
+ char *text;
+ char terminator;
+{
+ int len=0;
+
+ while (1) {
+ while (*text!='@' && *text!='\n' && *text!=terminator && *text) {
+ text++;
+ len++;
+ }
+
+ if (*text!='@')
+ return(len);
+
+ if (*(text+1)=='@')
+ (void) memmove(text+1,text+2,strlen(text+1));
+ else if (env_length(text+1) != -1)
+ return(len);
+
+ text++;
+ len++;
+ }
+}
+
+/* parses str into a desc linked list. Returns number of strings and
+ newlines in *pstr and *pnl */
+
+desctype *disp_get_cmds(str,pstr,pnl)
+char *str;
+int *pstr,*pnl;
+{
+ desctype *desc,*here;
+ int len;
+ char_stack terminators = char_stack_create();
+ char terminator;
+ int nstr=0, nnl=0;
+ char *curstr;
+
+ desc=(desctype *) malloc(sizeof(desctype));
+ here=desc;
+ curstr=str;
+ terminator = '\0';
+
+ while (*curstr) {
+ if (*curstr=='\n') {
+ here->code=DT_NL;
+ curstr++;
+ nnl++;
+ } else if (*curstr==terminator) { /* if this is the end of an env */
+ here->code=DT_END;
+ terminator = char_stack_top(terminators);
+ char_stack_pop(terminators);
+ curstr++;
+ } else if (len=text_length(curstr,terminator)) { /* if there is a text
+ block here */
+ here->code=DT_STR;
+ here->str=curstr;
+ here->len=len;
+ curstr+=len;
+ nstr++;
+ } else if (*curstr=='@') { /* if this is the beginning of an env */
+ len=env_length(curstr+1);
+ here->code=DT_ENV;
+ here->str=curstr+1;
+ here->len=len;
+ char_stack_push(terminators, terminator);
+ terminator=otherside(*(curstr+1+len));
+ curstr+=(len+2); /* jump over @, env name, and opener */
+ }
+
+ here->next=(desctype *) malloc(sizeof(desctype));
+ here=here->next;
+ }
+
+ while (!char_stack_empty(terminators)) {
+ here->code=DT_END;
+ terminator = char_stack_top(terminators);
+ char_stack_pop(terminators);
+ here->next=(desctype *) malloc(sizeof(desctype));
+ here=here->next;
+ }
+ here->code=DT_EOF;
+ *pstr=nstr;
+ *pnl=nnl;
+
+#ifdef DEBUG_PRINTOUT
+ { string temp;
+ here = desc;
+ while (here->code != DT_EOF) {
+ if (here->code == DT_STR || here->code == DT_ENV) {
+ temp = string_CreateFromData(here->str, here->len);
+ printf("[%d <%s>]\n", here->code, temp);
+ free(temp);
+ } else
+ printf("[%d]\n", here->code);
+ here=here->next;
+ }
+ }
+#endif
+
+ return(desc);
+}
projects / 1ts-debian.git / blobdiff