diff options
Diffstat (limited to 'src/treewalk/read_line.c')
-rw-r--r-- | src/treewalk/read_line.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/treewalk/read_line.c b/src/treewalk/read_line.c new file mode 100644 index 0000000..03146ad --- /dev/null +++ b/src/treewalk/read_line.c | |||
@@ -0,0 +1,32 @@ | |||
1 | #include "read_line.h" | ||
2 | |||
3 | static char readline_buf[RL_BUF_SIZE]; | ||
4 | |||
5 | StringView | ||
6 | read_line(void) { | ||
7 | // Clear buffer. | ||
8 | for (size_t i = 0; i < RL_BUF_SIZE; i++) { | ||
9 | readline_buf[i] = 0; | ||
10 | } | ||
11 | |||
12 | // Barebones readline implementation. | ||
13 | size_t n = 0; | ||
14 | char c; | ||
15 | while ((c = getchar()) != '\n') { | ||
16 | if (c == '\b') { | ||
17 | readline_buf[n] = '\0'; | ||
18 | n--; | ||
19 | } else if (c == EOF || c == '\0') { | ||
20 | return (StringView){ .start = NULL, .n = 0 }; | ||
21 | } else if ((c >= ' ' && c <= '~') && n < RL_BUF_SIZE) { | ||
22 | readline_buf[n] = c; | ||
23 | n++; | ||
24 | } | ||
25 | } | ||
26 | |||
27 | StringView sv = (StringView){ | ||
28 | .start = (char *)&readline_buf, | ||
29 | .n = n, | ||
30 | }; | ||
31 | return sv; | ||
32 | } | ||