94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/* manexamp.c -- The examples which appear in the documentation are here. */
|
|
|
|
#include <stdio.h>
|
|
#include <readline/readline.h>
|
|
|
|
|
|
/* **************************************************************** */
|
|
/* */
|
|
* How to Emulate gets () */
|
|
/* */
|
|
/* **************************************************************** */
|
|
|
|
/* A static variable for holding the line. */
|
|
static char *line_read = (char *)NULL;
|
|
|
|
/* Read a string, and return a pointer to it. Returns NULL on EOF. */
|
|
char *
|
|
rl_gets ()
|
|
{
|
|
/* If the buffer has already been allocated, return the memory
|
|
to the free pool. */
|
|
if (line_read)
|
|
{
|
|
free (line_read);
|
|
line_read = (char *)NULL;
|
|
}
|
|
|
|
/* Get a line from the user. */
|
|
line_read = readline ("");
|
|
|
|
/* If the line has any text in it, save it on the history. */
|
|
if (line_read && *line_read)
|
|
add_history (line_read);
|
|
|
|
return (line_read);
|
|
}
|
|
|
|
/* **************************************************************** */
|
|
/* */
|
|
/* Writing a Function to be Called by Readline. */
|
|
/* */
|
|
/* **************************************************************** */
|
|
|
|
/* Invert the case of the COUNT following characters. */
|
|
invert_case_line (count, key)
|
|
int count, key;
|
|
{
|
|
register int start, end;
|
|
|
|
start = rl_point;
|
|
|
|
if (count < 0)
|
|
{
|
|
direction = -1;
|
|
count = -count;
|
|
}
|
|
else
|
|
direction = 1;
|
|
|
|
/* Find the end of the range to modify. */
|
|
end = start + (count * direction);
|
|
|
|
/* Force it to be within range. */
|
|
if (end > rl_end)
|
|
end = rl_end;
|
|
else if (end < 0)
|
|
end = -1;
|
|
|
|
if (start > end)
|
|
{
|
|
int temp = start;
|
|
start = end;
|
|
end = temp;
|
|
}
|
|
|
|
if (start == end)
|
|
return;
|
|
|
|
/* Tell readline that we are modifying the line, so save the undo
|
|
information. */
|
|
rl_modifying (start, end);
|
|
|
|
for (; start != end; start += direction)
|
|
{
|
|
if (uppercase_p (rl_line_buffer[start]))
|
|
rl_line_buffer[start] = to_lower (rl_line_buffer[start]);
|
|
else if (lowercase_p (rl_line_buffer[start]))
|
|
rl_line_buffer[start] = to_upper (rl_line_buffer[start]);
|
|
}
|
|
|
|
/* Move point to on top of the last character changed. */
|
|
rl_point = end - direction;
|
|
}
|
|
|