diff options
Diffstat (limited to 'py/misc.h')
| -rw-r--r-- | py/misc.h | 16 |
1 files changed, 16 insertions, 0 deletions
@@ -10,6 +10,11 @@ typedef unsigned char byte; typedef unsigned int uint; +/** generic ops *************************************************/ + +#define MIN(x, y) ((x) < (y) ? (x) : (y)) +#define MAX(x, y) ((x) > (y) ? (x) : (y)) + /** memomry allocation ******************************************/ // TODO make a lazy m_renew that can increase by a smaller amount than requested (but by at least 1 more element) @@ -85,6 +90,17 @@ void vstr_add_strn(vstr_t *vstr, const char *str, int len); void vstr_cut_tail(vstr_t *vstr, int len); void vstr_printf(vstr_t *vstr, const char *fmt, ...); +/** non-dynamic size-bounded variable buffer/string *************/ + +#define CHECKBUF(buf, max_size) char buf[max_size + 1]; uint buf##_len = max_size; char *buf##_p = buf; +#define CHECKBUF_APPEND(buf, src, src_len) \ + { int l = MIN(src_len, buf##_len); \ + memcpy(buf##_p, src, l); \ + buf##_len -= l; \ + buf##_p += l; } +#define CHECKBUF_APPEND_0(buf) { *buf##_p = 0; } +#define CHECKBUF_LEN(buf) (buf##_p - buf) + #ifdef va_start void vstr_vprintf(vstr_t *vstr, const char *fmt, va_list ap); #endif |