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/*************************************************************
* This file is an extension for the Surface Evolver *
* Programmer: Laszlo Csirmaz, csirmaz@renyi.hu *
************************************************************/
/************************************************************************
*
* File: readline.c
*
* Purpose: automatic extension by using the "readline" library
*
*
*/
#ifdef USE_READLINE
#include <readline/readline.h>
#include <readline/history.h>
static int whspace(char c)
{ switch(c){
case ' ': case '\t': case '\r': case '\n': return 1;
default: break;
}
return 0;
}
static char *stripwhite(char *str)
{char *s,*t;
for(s=str;whspace(*s);s++);
if(*s==0) return s;
t=s+strlen(s)-1;
while(t>s && whspace(*t))t--;
*++t='\0';
return s;
}
/* list of extended words in alphabetical order; no single letter
word is extended */
static char *head[]={
#include "rl_head.h"
NULL
};
static char *middle[]={
#include "rl_mid.h"
NULL
};
static char **expand_from;
static int do_file_expand=0;
static int save_history=1;
static char *lastline = NULL;
static int lastlinepos = 0;
static int readline_initialized=0;
static char * match_generator(const char *txt, int state)
{static int list_index,len; char *name;
if(state==0){ /* first call */
list_index=0;
len=strlen(txt);
}
while( (name=expand_from[list_index])!=NULL ){
list_index++;
if(strncmp(name,txt,len)==0)
return strdup(name);
}
return (char*)NULL;
}
static char **my_comp( const char *text, int start, int end)
{
// the string to be completed starts at "start"
if(do_file_expand == 0){ /* no filename extension */
expand_from = start ? middle : head;
return rl_completion_matches(text,match_generator);
}
rl_attempted_completion_over = 0;
return (char **)NULL; /* filename extension */
}
void save_readline_history(void)
{ char *HOME, hist[PATHSIZE];
HOME=getenv("HOME"); if(HOME){
hist[PATHSIZE-1]=0;
strncpy(hist,HOME,PATHSIZE-1);
strncat(hist,"/.evolver",PATHSIZE-1-strlen(HOME));
write_history(hist);
}
}
static int use_readline(char *prompt, char *inmsg, int max )
{int len; char *s;
if(readline_initialized==0){
char *HOME, hist[PATHSIZE];
readline_initialized=1;
rl_readline_name="evolver";
rl_attempted_completion_function=my_comp;
using_history(); /* initialize */
HOME=getenv("HOME"); if(HOME){
hist[PATHSIZE-1]=0;
strncpy(hist,HOME,PATHSIZE-1);
strncat(hist,"/.evolver",PATHSIZE-1-strlen(HOME));
read_history_range(hist,0,100);
}
}
if(prompt == CONTPROMPT ){ /* next part of lastline */
s=lastline+lastlinepos;
len=strlen(s); strncpy(inmsg,s,max);
if(len >= max-1) {
inmsg[max-1]=MOREIN; inmsg[max]=0; len=max-1;
}
lastlinepos += len;
return 1;
}
if(prompt == MOREPROMPT ){ /* continuation line */
/* do not add to the history yet */
char *contline,*new;
contline = readline( topflag ? "" : "more> " );
if(!contline){ contline = strdup(""); }
s=stripwhite(contline);
new=malloc(lastlinepos+strlen(s)+2);
if(!new){ /* pretend got nothing */
free(contline);
s=lastline+lastlinepos;
} else {
strncpy(new,lastline,lastlinepos);
strcpy(new+lastlinepos," ");
lastlinepos++;
strcpy(new+lastlinepos,s);
free(lastline); free(contline); lastline=new;
s=lastline+lastlinepos;
}
} else { /* read next line */
if(lastline){
s=stripwhite(lastline); if(save_history && *s && s[1] && s[2]){
HIST_ENTRY **hl; int n,i,found;
/* if it is not on the history list, put it on;
otherwise move the line to the last one */
hl=history_list(); /* get the history list */
found=0;
if(hl){ /* find the current line */
i=0;
for(n=0; *hl && (*hl)->line ; hl++,n++);
while(found==0 && n>0 && i<10){
i++; n--; hl--;
if(strcmp((*hl)->line,s)==0){
HIST_ENTRY *old;
found=1;
old=remove_history(n);
if(old && old->line) free(old->line);
}
}
}
add_history(s);
}
free(lastline);
}
do_file_expand=0; save_history = 1;
if( strstr(prompt,"file") ) do_file_expand=1;
if( strcmp(prompt,"Graphics command: ")==0) save_history = 0;
lastline = readline(prompt);
if(!lastline) { /* EOF */
return EOF;
}
s=stripwhite(lastline); lastlinepos=s-lastline;
}
len=strlen(s); strncpy(inmsg,s,max);
if(len >= max-1) {
inmsg[max-1]=MOREIN; inmsg[max]=0; len=max-1;
}
lastlinepos += len;
return 1;
}
#endif
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