diff options
Diffstat (limited to 'usr.bin/bc/scan.l')
| -rw-r--r-- | usr.bin/bc/scan.l | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/usr.bin/bc/scan.l b/usr.bin/bc/scan.l index 81dd862..40f8ae6 100644 --- a/usr.bin/bc/scan.l +++ b/usr.bin/bc/scan.l @@ -22,6 +22,7 @@ __FBSDID("$FreeBSD$"); #include <err.h> #include <errno.h> +#include <histedit.h> #include <signal.h> #include <stdbool.h> #include <string.h> @@ -33,13 +34,22 @@ __FBSDID("$FreeBSD$"); int lineno; +bool interactive; +HistEvent he; +EditLine *el; +History *hist; + static char *strbuf = NULL; static size_t strbuf_sz = 1; static bool dot_seen; static void init_strbuf(void); static void add_str(const char *); +static int bc_yyinput(char *, int); +#undef YY_INPUT +#define YY_INPUT(buf,retval,max) \ + (retval = bc_yyinput(buf, max)) %} %option always-interactive @@ -286,3 +296,32 @@ yywrap(void) } return (1); } + +static int +bc_yyinput(char *buf, int maxlen) +{ + int num; + if (interactive) { + const char *bp; + + if ((bp = el_gets(el, &num)) == NULL || num == 0) + return (0); + if (num > maxlen) { + el_push(el, (char *)(uintptr_t)(bp) + maxlen); + num = maxlen; + } + memcpy(buf, bp, num); + history(hist, &he, H_ENTER, bp); + } else { + int c = '*'; + for (num = 0; num < maxlen && + (c = getc(yyin)) != EOF && c != '\n'; ++num) + buf[num] = (char) c; + if (c == '\n') + buf[num++] = (char) c; + if (c == EOF && ferror(yyin)) + YY_FATAL_ERROR( "input in flex scanner failed" ); + } + return (num); +} + |
