epicsReadline.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "envDefs.h"
#include "epicsReadline.h"

Include dependency graph for epicsReadline.c:

Go to the source code of this file.

Classes
struct	readlineContext

Macros
#define	EPICS_COMMANDLINE_LIBRARY_EPICS   0
#define	EPICS_COMMANDLINE_LIBRARY_LIBTECLA   1
#define	EPICS_COMMANDLINE_LIBRARY_LEDLIB   1
#define	EPICS_COMMANDLINE_LIBRARY_OTHER   1
#define	EPICS_COMMANDLINE_LIBRARY_READLINE   2
#define	EPICS_COMMANDLINE_LIBRARY_READLINE_CURSES   2
#define	EPICS_COMMANDLINE_LIBRARY_READLINE_NCURSES   2
#define	EPICS_COMMANDLINE_LIBRARY   EPICS_COMMANDLINE_LIBRARY_EPICS

Functions
void *epicsStdCall	epicsReadlineBegin (FILE *in)
	Create a command-line context. More...
char *epicsStdCall	epicsReadline (const char *prompt, void *context)
	Read a line of input. More...
void epicsStdCall	epicsReadlineEnd (void *context)
	Destroy a command-line context. More...

Macro Definition Documentation

#define EPICS_COMMANDLINE_LIBRARY   EPICS_COMMANDLINE_LIBRARY_EPICS

Definition at line 31 of file epicsReadline.c.

#define EPICS_COMMANDLINE_LIBRARY_EPICS   0

Definition at line 18 of file epicsReadline.c.

#define EPICS_COMMANDLINE_LIBRARY_LEDLIB   1

Definition at line 22 of file epicsReadline.c.

#define EPICS_COMMANDLINE_LIBRARY_LIBTECLA   1

Definition at line 21 of file epicsReadline.c.

#define EPICS_COMMANDLINE_LIBRARY_OTHER   1

Definition at line 23 of file epicsReadline.c.

#define EPICS_COMMANDLINE_LIBRARY_READLINE   2

Definition at line 26 of file epicsReadline.c.

#define EPICS_COMMANDLINE_LIBRARY_READLINE_CURSES   2

Definition at line 27 of file epicsReadline.c.

#define EPICS_COMMANDLINE_LIBRARY_READLINE_NCURSES   2

Definition at line 28 of file epicsReadline.c.

Function Documentation

char* epicsStdCall epicsReadline	(	const char *	prompt,
		void *	context
	)

Read a line of input.

Parameters

prompt	Prompt string
context	To read from

Returns

Line read

Definition at line 81 of file epicsReadline.c.

{
    struct readlineContext *rc = context;
    FILE *in;
    char *line;
    int c;      /* char is unsigned on some archs, EOF is -ve */
    int linelen = 0;
    int linesize = 50;

    if (rc->osd)
        return osdReadline(prompt, rc);

    free(rc->line);
    rc->line = NULL;
    if ((in = rc->in) == NULL) {
        in = stdin;
        if (prompt) {
            fputs(prompt, stdout);
            fflush(stdout);
        }
    }
    line = (char *)malloc(linesize);
    if (line == NULL) {
        printf("Out of memory!\n");
        return NULL;
    }
    while ((c = getc(in)) !=  '\n') {
        if (c == EOF) {
            if (ferror(in)) {
                if ((errno == EINTR) || (errno == EPIPE)) {
                    clearerr(in);
                    continue;
                }
            }
            free (line);
            return NULL;
        }
        if ((linelen + 1) >= linesize) {
            char *cp;

            linesize += 50;
            cp = (char *)realloc(line, linesize);
            if (cp == NULL) {
                printf("Out of memory!\n");
                free(line);
                return NULL;
            }
            line = cp;
        }
        line[linelen++] = c;
    }
    line[linelen] = '\0';
    rc->line = line;
    return line;
}

void* epicsStdCall epicsReadlineBegin

(

FILE *

in

)

Create a command-line context.

Parameters

in	Filehandle to read from

Returns

Command-line context

Definition at line 64 of file epicsReadline.c.

{
    struct readlineContext *rc = calloc(1, sizeof(*rc));

    if (rc) {
        rc->in = in;
        rc->line = NULL;
        if (!envGetConfigParamPtr(&IOCSH_HISTEDIT_DISABLE))
            osdReadlineBegin(rc);
    }
    return rc;
}

void epicsStdCall epicsReadlineEnd

(

void *

context

)

Destroy a command-line context.

Parameters

context

Command-line context to destroy

Definition at line 141 of file epicsReadline.c.

{
    if (context) {
        struct readlineContext *rc = context;

        if (rc->osd)
            osdReadlineEnd(rc);
        else
            free(rc->line);
        free(rc);
    }
}