projects / thirdparty / bash.git / blame
| Commit | Line | Data |
|---|---|---|
| 726f6388 JA |
1 | /* manexamp.c -- The examples which appear in the documentation are here. */ |
| 2 | ||
| 3 | #include <stdio.h> | |
| 4 | #include <readline/readline.h> | |
| 5 | ||
| 726f6388 JA |
6 | /* **************************************************************** */ |
| 7 | /* */ | |
| 28ef6c31 | 8 | /* How to Emulate gets () */ |
| 726f6388 JA |
9 | /* */ |
| 10 | /* **************************************************************** */ | |
| 11 | ||
| 12 | /* A static variable for holding the line. */ | |
| 13 | static char *line_read = (char *)NULL; | |
| 14 | ||
| 15 | /* Read a string, and return a pointer to it. Returns NULL on EOF. */ | |
| 16 | char * | |
| 17 | rl_gets () | |
| 18 | { | |
| 19 | /* If the buffer has already been allocated, return the memory | |
| 20 | to the free pool. */ | |
| 21 | if (line_read) | |
| 22 | { | |
| 23 | free (line_read); | |
| 24 | line_read = (char *)NULL; | |
| 25 | } | |
| 26 | ||
| 27 | /* Get a line from the user. */ | |
| 28 | line_read = readline (""); | |
| 29 | ||
| 30 | /* If the line has any text in it, save it on the history. */ | |
| 31 | if (line_read && *line_read) | |
| 32 | add_history (line_read); | |
| 33 | ||
| 34 | return (line_read); | |
| 35 | } | |
| 36 | ||
| 37 | /* **************************************************************** */ | |
| 38 | /* */ | |
| 39 | /* Writing a Function to be Called by Readline. */ | |
| 40 | /* */ | |
| 41 | /* **************************************************************** */ | |
| 42 | ||
| 43 | /* Invert the case of the COUNT following characters. */ | |
| 44 | invert_case_line (count, key) | |
| 45 | int count, key; | |
| 46 | { | |
| 47 | register int start, end; | |
| 48 | ||
| 49 | start = rl_point; | |
| 50 | ||
| 51 | if (count < 0) | |
| 52 | { | |
| 53 | direction = -1; | |
| 54 | count = -count; | |
| 55 | } | |
| 56 | else | |
| 57 | direction = 1; | |
| 58 | ||
| 59 | /* Find the end of the range to modify. */ | |
| 60 | end = start + (count * direction); | |
| 61 | ||
| 62 | /* Force it to be within range. */ | |
| 63 | if (end > rl_end) | |
| 64 | end = rl_end; | |
| 65 | else if (end < 0) | |
| 66 | end = -1; | |
| 67 | ||
| 68 | if (start > end) | |
| 69 | { | |
| 70 | int temp = start; | |
| 71 | start = end; | |
| 72 | end = temp; | |
| 73 | } | |
| 74 | ||
| 75 | if (start == end) | |
| 76 | return; | |
| 77 | ||
| 78 | /* Tell readline that we are modifying the line, so save the undo | |
| 79 | information. */ | |
| 80 | rl_modifying (start, end); | |
| 81 | ||
| 82 | for (; start != end; start += direction) | |
| 83 | { | |
| 28ef6c31 JA |
84 | if (_rl_uppercase_p (rl_line_buffer[start])) |
| 85 | rl_line_buffer[start] = _rl_to_lower (rl_line_buffer[start]); | |
| 86 | else if (_rl_lowercase_p (rl_line_buffer[start])) | |
| 87 | rl_line_buffer[start] = _rl_to_upper (rl_line_buffer[start]); | |
| 726f6388 JA |
88 | } |
| 89 | ||
| 90 | /* Move point to on top of the last character changed. */ | |
| 91 | rl_point = end - direction; | |
| 92 | } |