diff options
-rwxr-xr-x | src/bootstrap/main.c | 13 | ||||
-rw-r--r-- | src/bootstrap/read_line.c | 32 |
2 files changed, 42 insertions, 3 deletions
diff --git a/src/bootstrap/main.c b/src/bootstrap/main.c index b5fd821..662831e 100755 --- a/src/bootstrap/main.c +++ b/src/bootstrap/main.c | |||
@@ -4,6 +4,7 @@ | |||
4 | #include <stdlib.h> | 4 | #include <stdlib.h> |
5 | 5 | ||
6 | #include "string_view.c" | 6 | #include "string_view.c" |
7 | #include "read_line.c" | ||
7 | 8 | ||
8 | void | 9 | void |
9 | process_source(const StringView *source) { | 10 | process_source(const StringView *source) { |
@@ -14,11 +15,17 @@ process_source(const StringView *source) { | |||
14 | 15 | ||
15 | void | 16 | void |
16 | run_repl(void) { | 17 | run_repl(void) { |
17 | printf("BDL REPL (Press Ctrl-C to exit)\n"); | 18 | printf("BDL REPL (Press Ctrl-D or Ctrl-C to exit)\n"); |
18 | while (true) { | 19 | while (true) { |
19 | printf(REPL_PROMPT); | 20 | printf(REPL_PROMPT); |
20 | getchar(); | 21 | StringView sv = read_line(); |
21 | process_source(NULL); | 22 | if (sv.start == NULL) { |
23 | return; | ||
24 | } | ||
25 | process_source(&sv); | ||
26 | if (sv.n != 0) { | ||
27 | printf("\n"); | ||
28 | } | ||
22 | } | 29 | } |
23 | } | 30 | } |
24 | 31 | ||
diff --git a/src/bootstrap/read_line.c b/src/bootstrap/read_line.c new file mode 100644 index 0000000..7612d05 --- /dev/null +++ b/src/bootstrap/read_line.c | |||
@@ -0,0 +1,32 @@ | |||
1 | #define RL_BUF_SIZE 1024 | ||
2 | static char readline_buf[RL_BUF_SIZE]; | ||
3 | |||
4 | StringView | ||
5 | read_line(void) { | ||
6 | // Clear buffer. | ||
7 | for (size_t i = 0; i < RL_BUF_SIZE; i++) { | ||
8 | readline_buf[i] = 0; | ||
9 | } | ||
10 | |||
11 | // Barebones readline implementation. | ||
12 | size_t n = 0; | ||
13 | char c; | ||
14 | while ((c = getchar()) != '\n') { | ||
15 | if (c == '\b') { | ||
16 | readline_buf[n] = '\0'; | ||
17 | n--; | ||
18 | } else if (c == EOF || c == '\0') { | ||
19 | return (StringView){ .start = NULL, .n = 0 }; | ||
20 | } else if ((c >= ' ' && c <= '~') && n < RL_BUF_SIZE) { | ||
21 | readline_buf[n] = c; | ||
22 | n++; | ||
23 | } | ||
24 | } | ||
25 | |||
26 | StringView sv = (StringView){ | ||
27 | .start = (char *)&readline_buf, | ||
28 | .n = n, | ||
29 | }; | ||
30 | return sv; | ||
31 | } | ||
32 | |||