diff options
Diffstat (limited to 'src/libString/s_read_line.c')
-rw-r--r-- | src/libString/s_read_line.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/libString/s_read_line.c b/src/libString/s_read_line.c new file mode 100644 index 00000000..b1de5ac4 --- /dev/null +++ b/src/libString/s_read_line.c @@ -0,0 +1,31 @@ +#include <u.h> +#include <libc.h> +#include <bio.h> +#include "libString.h" + +/* Append an input line to a String. + * + * Returns a pointer to the character string (or 0). + * Trailing newline is left on. + */ +extern char * +s_read_line(Biobuf *fp, String *to) +{ + char *cp; + int llen; + + if(to->ref > 1) + sysfatal("can't s_read_line a shared string"); + s_terminate(to); + cp = Brdline(fp, '\n'); + if(cp == 0) + return 0; + llen = Blinelen(fp); + if(to->end - to->ptr < llen) + s_grow(to, llen); + memmove(to->ptr, cp, llen); + cp = to->ptr; + to->ptr += llen; + s_terminate(to); + return cp; +} |