sdl/prompt.h

   1 #ifndef PROMPT_H_
   2 #define PROMPT_H_
   3
   4 #include <stddef.h>
   5 #include <stdint.h>
   6
   7 #ifdef __cplusplus
   8 #define PROMPT_DECL_BEGIN__ extern "C" {
   9 #define PROMPT_DECL_END__ }
  10 #else
  11 #define PROMPT_DECL_BEGIN__
  12 #define PROMPT_DECL_END__
  13 #endif
  14
  15 #define PROMPT_HIST_SIZE 64
  16 #define PROMPT_LINE_SIZE 512
  17
  18 PROMPT_DECL_BEGIN__
  19
  20 struct prompt {
  21         unsigned int cursor; /* cursor position for current line */
  22         unsigned int current; /* current history[] entry */
  23         unsigned int entries; /* number of entries in history[] */
  24         struct prompt_history {
  25                 unsigned int length; /* line length */
  26                 uint8_t line[PROMPT_LINE_SIZE]; /* line data */
  27         } history[PROMPT_HIST_SIZE];
  28 };
  29
  30 struct prompt_parse {
  31         unsigned int index; /* current index in argv */
  32         unsigned int cursor; /* cursor position for current index or ~0u */
  33         unsigned int argc; /* number of elements in argv */
  34         uint8_t **argv; /* NULL-terminated array of pointers to each word */
  35         unsigned int *args; /* size of each argv[] element */
  36         struct prompt_parse_argo {
  37                 unsigned int pos;
  38                 unsigned int len;
  39         } *argo; /* position and length of each element in original string */
  40 };
  41
  42 extern void prompt_init(struct prompt *p);
  43 extern void prompt_push(struct prompt *p);
  44 extern void prompt_older(struct prompt *p);
  45 extern void prompt_newer(struct prompt *p);
  46 extern void prompt_left(struct prompt *p);
  47 extern void prompt_right(struct prompt *p);
  48 extern void prompt_begin(struct prompt *p);
  49 extern void prompt_end(struct prompt *p);
  50 extern void prompt_clear(struct prompt *p);
  51 extern void prompt_put(struct prompt *p, uint8_t c);
  52 extern void prompt_delete(struct prompt *p);
  53 extern void prompt_backspace(struct prompt *p);
  54 extern void prompt_replace(struct prompt *p, unsigned int pos,
  55                            unsigned int len, const uint8_t *with,
  56                            unsigned int with_len);
  57 extern struct prompt_parse *prompt_parse(struct prompt *p,
  58                                          struct prompt_parse *pp);
  59 extern void prompt_parse_clean(struct prompt_parse *pp);
  60
  61 PROMPT_DECL_END__
  62
  63 #endif /* PROMPT_H_ */