ref: fc70233e629c5a83b20e72086e6c5e4d038982bd
dir: /sbuf.c/
#include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "xroff.h" #define SBUF_SZ 1024 void sbuf_init(struct sbuf *sbuf) { sbuf->s = malloc(SBUF_SZ); sbuf->sz = SBUF_SZ; sbuf->n = 0; } static void sbuf_extend(struct sbuf *sbuf, int amount) { char *s = sbuf->s; sbuf->s = malloc(amount); sbuf->sz = amount; memcpy(sbuf->s, s, sbuf->n); } void sbuf_add(struct sbuf *sbuf, int c) { if (sbuf->n + 2 >= sbuf->sz) sbuf_extend(sbuf, sbuf->sz * 2); sbuf->s[sbuf->n++] = c; } void sbuf_append(struct sbuf *sbuf, char *s) { int len = strlen(s); if (sbuf->n + len + 1 >= sbuf->sz) sbuf_extend(sbuf, sbuf->n + len + 1); memcpy(sbuf->s + sbuf->n, s, len); sbuf->n += len; } void sbuf_printf(struct sbuf *sbuf, char *s, ...) { char buf[ILNLEN]; va_list ap; va_start(ap, s); vsprintf(buf, s, ap); va_end(ap); sbuf_append(sbuf, buf); } void sbuf_putnl(struct sbuf *sbuf) { if (sbuf->n && sbuf->s[sbuf->n - 1] != '\n') sbuf_add(sbuf, '\n'); } int sbuf_empty(struct sbuf *sbuf) { return !sbuf->n; } char *sbuf_buf(struct sbuf *sbuf) { sbuf->s[sbuf->n] = '\0'; return sbuf->s; } void sbuf_done(struct sbuf *sbuf) { free(sbuf->s); }