We want to reuse the editing code elsewhere. As a first step, move the common variables into a struct. This will allow us to eventually put the contents of the inner loop in a function, so it can be called from elsewhere.
Signed-off-by: Simon Glass sjg@chromium.org ---
common/cli_readline.c | 116 ++++++++++++++++++++++-------------------- include/cli.h | 14 +++++ 2 files changed, 75 insertions(+), 55 deletions(-)
diff --git a/common/cli_readline.c b/common/cli_readline.c index f863404110c..03624ca18af 100644 --- a/common/cli_readline.c +++ b/common/cli_readline.c @@ -188,27 +188,27 @@ void cread_print_hist_list(void) }
#define BEGINNING_OF_LINE() { \ - while (num) { \ + while (cls->num) { \ getcmd_putch(CTL_BACKSPACE); \ - num--; \ + cls->num--; \ } \ }
#define ERASE_TO_EOL() { \ - if (num < eol_num) { \ - printf("%*s", (int)(eol_num - num), ""); \ + if (cls->num < cls->eol_num) { \ + printf("%*s", (int)(cls->eol_num - cls->num), ""); \ do { \ getcmd_putch(CTL_BACKSPACE); \ - } while (--eol_num > num); \ + } while (--cls->eol_num > cls->num); \ } \ }
-#define REFRESH_TO_EOL() { \ - if (num < eol_num) { \ - wlen = eol_num - num; \ - putnstr(buf + num, wlen); \ - num = eol_num; \ - } \ +#define REFRESH_TO_EOL() { \ + if (cls->num < cls->eol_num) { \ + uint wlen = cls->eol_num - cls->num; \ + putnstr(buf + cls->num, wlen); \ + cls->num = cls->eol_num; \ + } \ }
static void cread_add_char(char ichar, int insert, uint *num, @@ -257,18 +257,18 @@ static int cread_line(const char *const prompt, char *buf, unsigned int *len, int timeout) { struct cli_ch_state s_cch, *cch = &s_cch; - uint num = 0; - uint eol_num = 0; - uint wlen; + struct cli_line_state s_cls, *cls = &s_cls; char ichar; - int insert = 1; int init_len = strlen(buf); int first = 1;
cli_ch_init(cch); + memset(cls, '\0', sizeof(struct cli_line_state)); + cls->insert = true;
if (init_len) - cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); + cread_add_str(buf, init_len, 1, &cls->num, &cls->eol_num, buf, + *len);
while (1) { /* Check for saved characters */ @@ -309,30 +309,33 @@ static int cread_line(const char *const prompt, char *buf, unsigned int *len, *buf = '\0'; /* discard input */ return -1; case CTL_CH('f'): - if (num < eol_num) { - getcmd_putch(buf[num]); - num++; + if (cls->num < cls->eol_num) { + getcmd_putch(buf[cls->num]); + cls->num++; } break; case CTL_CH('b'): - if (num) { + if (cls->num) { getcmd_putch(CTL_BACKSPACE); - num--; + cls->num--; } break; case CTL_CH('d'): - if (num < eol_num) { - wlen = eol_num - num - 1; + if (cls->num < cls->eol_num) { + uint wlen; + + wlen = cls->eol_num - cls->num - 1; if (wlen) { - memmove(&buf[num], &buf[num+1], wlen); - putnstr(buf + num, wlen); + memmove(&buf[cls->num], + &buf[cls->num + 1], wlen); + putnstr(buf + cls->num, wlen); }
getcmd_putch(' '); do { getcmd_putch(CTL_BACKSPACE); } while (wlen--); - eol_num--; + cls->eol_num--; } break; case CTL_CH('k'): @@ -342,28 +345,28 @@ static int cread_line(const char *const prompt, char *buf, unsigned int *len, REFRESH_TO_EOL(); break; case CTL_CH('o'): - insert = !insert; + cls->insert = !cls->insert; break; case CTL_CH('w'): - if (num) { - uint base; + if (cls->num) { + uint base, wlen;
- for (base = num - 1; + for (base = cls->num - 1; base >= 0 && buf[base] == ' ';) base--; for (; base > 0 && buf[base - 1] != ' ';) base--;
- /* now delete chars from base to num */ - wlen = num - base; - eol_num -= wlen; - memmove(&buf[base], &buf[num], - eol_num - base + 1); - num = base; + /* now delete chars from base to cls->num */ + wlen = cls->num - base; + cls->eol_num -= wlen; + memmove(&buf[base], &buf[cls->num], + cls->eol_num - base + 1); + cls->num = base; getcmd_putchars(wlen, CTL_BACKSPACE); puts(buf + base); getcmd_putchars(wlen, ' '); - getcmd_putchars(wlen + eol_num - num, + getcmd_putchars(wlen + cls->eol_num - cls->num, CTL_BACKSPACE); } break; @@ -375,17 +378,20 @@ static int cread_line(const char *const prompt, char *buf, unsigned int *len, case DEL: case DEL7: case 8: - if (num) { - wlen = eol_num - num; - num--; - memmove(&buf[num], &buf[num+1], wlen); + if (cls->num) { + uint wlen; + + wlen = cls->eol_num - cls->num; + cls->num--; + memmove(&buf[cls->num], &buf[cls->num + 1], + wlen); getcmd_putch(CTL_BACKSPACE); - putnstr(buf + num, wlen); + putnstr(buf + cls->num, wlen); getcmd_putch(' '); do { getcmd_putch(CTL_BACKSPACE); } while (wlen--); - eol_num--; + cls->eol_num--; } break; case CTL_CH('p'): @@ -412,7 +418,7 @@ static int cread_line(const char *const prompt, char *buf, unsigned int *len,
/* copy new line into place and display */ strcpy(buf, hline); - eol_num = strlen(buf); + cls->eol_num = strlen(buf); REFRESH_TO_EOL(); continue; } @@ -421,30 +427,30 @@ static int cread_line(const char *const prompt, char *buf, unsigned int *len, int num2, col;
/* do not autocomplete when in the middle */ - if (num < eol_num) { + if (cls->num < cls->eol_num) { getcmd_cbeep(); break; }
- buf[num] = '\0'; - col = strlen(prompt) + eol_num; - num2 = num; + buf[cls->num] = '\0'; + col = strlen(prompt) + cls->eol_num; + num2 = cls->num; if (cmd_auto_complete(prompt, buf, &num2, &col)) { - col = num2 - num; - num += col; - eol_num += col; + col = num2 - cls->num; + cls->num += col; + cls->eol_num += col; } break; } fallthrough; default: - cread_add_char(ichar, insert, &num, &eol_num, buf, - *len); + cread_add_char(ichar, cls->insert, &cls->num, + &cls->eol_num, buf, *len); break; } } - *len = eol_num; - buf[eol_num] = '\0'; /* lose the newline */ + *len = cls->eol_num; + buf[cls->eol_num] = '\0'; /* lose the newline */
if (buf[0] && buf[0] != CREAD_HIST_CHAR) cread_add_to_hist(buf); diff --git a/include/cli.h b/include/cli.h index ac09c80c784..1bc1ab8035c 100644 --- a/include/cli.h +++ b/include/cli.h @@ -8,6 +8,7 @@ #define __CLI_H
#include <stdbool.h> +#include <linux/types.h>
/** * struct cli_ch_state - state information for reading cmdline characters @@ -24,6 +25,19 @@ struct cli_ch_state { bool emitting; };
+/** + * struct cli_line_state - state of the line editor + * + * @num: Current cursor position, where 0 is the start + * @eol_num: Number of characters in the buffer + * @insert: true if in 'insert' mode + */ +struct cli_line_state { + uint num; + uint eol_num; + bool insert; +}; + /** * Go into the command loop *