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 | ||
| 6 | ||
| 7 | /* **************************************************************** */ | |
| 8 | /* */ | |
| 9 | * How to Emulate gets () */ | |
| 10 | /* */ | |
| 11 | /* **************************************************************** */ | |
| 12 | ||
| 13 | /* A static variable for holding the line. */ | |
| 14 | static char *line_read = (char *)NULL; | |
| 15 | ||
| 16 | /* Read a string, and return a pointer to it. Returns NULL on EOF. */ | |
| 17 | char * | |
| 18 | rl_gets () | |
| 19 | { | |
| 20 | /* If the buffer has already been allocated, return the memory | |
| 21 | to the free pool. */ | |
| 22 | if (line_read) | |
| 23 | { | |
| 24 | free (line_read); | |
| 25 | line_read = (char *)NULL; | |
| 26 | } | |
| 27 | ||
| 28 | /* Get a line from the user. */ | |
| 29 | line_read = readline (""); | |
| 30 | ||
| 31 | /* If the line has any text in it, save it on the history. */ | |
| 32 | if (line_read && *line_read) | |
| 33 | add_history (line_read); | |
| 34 | ||
| 35 | return (line_read); | |
| 36 | } | |
| 37 | ||
| 38 | /* **************************************************************** */ | |
| 39 | /* */ | |
| 40 | /* Writing a Function to be Called by Readline. */ | |
| 41 | /* */ | |
| 42 | /* **************************************************************** */ | |
| 43 | ||
| 44 | /* Invert the case of the COUNT following characters. */ | |
| 45 | invert_case_line (count, key) | |
| 46 | int count, key; | |
| 47 | { | |
| 48 | register int start, end; | |
| 49 | ||
| 50 | start = rl_point; | |
| 51 | ||
| 52 | if (count < 0) | |
| 53 | { | |
| 54 | direction = -1; | |
| 55 | count = -count; | |
| 56 | } | |
| 57 | else | |
| 58 | direction = 1; | |
| 59 | ||
| 60 | /* Find the end of the range to modify. */ | |
| 61 | end = start + (count * direction); | |
| 62 | ||
| 63 | /* Force it to be within range. */ | |
| 64 | if (end > rl_end) | |
| 65 | end = rl_end; | |
| 66 | else if (end < 0) | |
| 67 | end = -1; | |
| 68 | ||
| 69 | if (start > end) | |
| 70 | { | |
| 71 | int temp = start; | |
| 72 | start = end; | |
| 73 | end = temp; | |
| 74 | } | |
| 75 | ||
| 76 | if (start == end) | |
| 77 | return; | |
| 78 | ||
| 79 | /* Tell readline that we are modifying the line, so save the undo | |
| 80 | information. */ | |
| 81 | rl_modifying (start, end); | |
| 82 | ||
| 83 | for (; start != end; start += direction) | |
| 84 | { | |
| 85 | if (uppercase_p (rl_line_buffer[start])) | |
| 86 | rl_line_buffer[start] = to_lower (rl_line_buffer[start]); | |
| 87 | else if (lowercase_p (rl_line_buffer[start])) | |
| 88 | rl_line_buffer[start] = to_upper (rl_line_buffer[start]); | |
| 89 | } | |
| 90 | ||
| 91 | /* Move point to on top of the last character changed. */ | |
| 92 | rl_point = end - direction; | |
| 93 | } | |
| 94 |