33 #define av_bprint_room(buf) ((buf)->size - FFMIN((buf)->len, (buf)->size))  argument
34 #define av_bprint_is_allocated(buf) ((buf)->str != (buf)->reserved_internal_buffer)  argument
36 static int av_bprint_alloc(AVBPrint *buf, unsigned room)  in av_bprint_alloc()  argument
41     if (buf->size == buf->size_max)  in av_bprint_alloc()
43     if (!av_bprint_is_complete(buf))  in av_bprint_alloc()
45     min_size = buf->len + 1 + FFMIN(UINT_MAX - buf->len - 1, room);  in av_bprint_alloc()
46     new_size = buf->size > buf->size_max / 2 ? buf->size_max : buf->size * 2;  in av_bprint_alloc()
48         new_size = FFMIN(buf->size_max, min_size);  in av_bprint_alloc()
49     old_str = av_bprint_is_allocated(buf) ? buf->str : NULL;  in av_bprint_alloc()
54         memcpy(new_str, buf->str, buf->len + 1);  in av_bprint_alloc()
55     buf->str  = new_str;  in av_bprint_alloc()
56     buf->size = new_size;  in av_bprint_alloc()
60 static void av_bprint_grow(AVBPrint *buf, unsigned extra_len)  in av_bprint_grow()  argument
63     extra_len = FFMIN(extra_len, UINT_MAX - 5 - buf->len);  in av_bprint_grow()
64     buf->len += extra_len;  in av_bprint_grow()
65     if (buf->size)  in av_bprint_grow()
66         buf->str[FFMIN(buf->len, buf->size - 1)] = 0;  in av_bprint_grow()
69 void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)  in av_bprint_init()  argument
71     unsigned size_auto = (char *)buf + sizeof(*buf) -  in av_bprint_init()
72                          buf->reserved_internal_buffer;  in av_bprint_init()
76     buf->str      = buf->reserved_internal_buffer;  in av_bprint_init()
77     buf->len      = 0;  in av_bprint_init()
78     buf->size     = FFMIN(size_auto, size_max);  in av_bprint_init()
79     buf->size_max = size_max;  in av_bprint_init()
80     *buf->str = 0;  in av_bprint_init()
81     if (size_init > buf->size)  in av_bprint_init()
82         av_bprint_alloc(buf, size_init - 1);  in av_bprint_init()
85 void av_bprint_init_for_buffer(AVBPrint *buf, char *buffer, unsigned size)  in av_bprint_init_for_buffer()  argument
87     buf->str      = buffer;  in av_bprint_init_for_buffer()
88     buf->len      = 0;  in av_bprint_init_for_buffer()
89     buf->size     = size;  in av_bprint_init_for_buffer()
90     buf->size_max = size;  in av_bprint_init_for_buffer()
91     *buf->str = 0;  in av_bprint_init_for_buffer()
94 void av_bprintf(AVBPrint *buf, const char *fmt, ...)  in av_bprintf()  argument
102         room = av_bprint_room(buf);  in av_bprintf()
103         dst = room ? buf->str + buf->len : NULL;  in av_bprintf()
111         if (av_bprint_alloc(buf, extra_len))  in av_bprintf()
114     av_bprint_grow(buf, extra_len);  in av_bprintf()
117 void av_vbprintf(AVBPrint *buf, const char *fmt, va_list vl_arg)  in av_vbprintf()  argument
125         room = av_bprint_room(buf);  in av_vbprintf()
126         dst = room ? buf->str + buf->len : NULL;  in av_vbprintf()
134         if (av_bprint_alloc(buf, extra_len))  in av_vbprintf()
137     av_bprint_grow(buf, extra_len);  in av_vbprintf()
140 void av_bprint_chars(AVBPrint *buf, char c, unsigned n)  in av_bprint_chars()  argument
145         room = av_bprint_room(buf);  in av_bprint_chars()
148         if (av_bprint_alloc(buf, n))  in av_bprint_chars()
153         memset(buf->str + buf->len, c, real_n);  in av_bprint_chars()
155     av_bprint_grow(buf, n);  in av_bprint_chars()
158 void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size)  in av_bprint_append_data()  argument
163         room = av_bprint_room(buf);  in av_bprint_append_data()
166         if (av_bprint_alloc(buf, size))  in av_bprint_append_data()
171         memcpy(buf->str + buf->len, data, real_n);  in av_bprint_append_data()
173     av_bprint_grow(buf, size);  in av_bprint_append_data()
176 void av_bprint_strftime(AVBPrint *buf, const char *fmt, const struct tm *tm)  in av_bprint_strftime()  argument
184         room = av_bprint_room(buf);  in av_bprint_strftime()
185         if (room && (l = strftime(buf->str + buf->len, room, fmt, tm)))  in av_bprint_strftime()
191         if (av_bprint_alloc(buf, room)) {  in av_bprint_strftime()
193             room = av_bprint_room(buf);  in av_bprint_strftime()
200                     av_bprintf(buf, "%s", buf2);  in av_bprint_strftime()
208                 memset(buf->str + buf->len, '!', room);  in av_bprint_strftime()
209                 memcpy(buf->str + buf->len, txt, FFMIN(sizeof(txt) - 1, room));  in av_bprint_strftime()
210                 av_bprint_grow(buf, room); /* force truncation */  in av_bprint_strftime()
215     av_bprint_grow(buf, l);  in av_bprint_strftime()
218 void av_bprint_get_buffer(AVBPrint *buf, unsigned size,  in av_bprint_get_buffer()  argument
221     if (size > av_bprint_room(buf))  in av_bprint_get_buffer()
222         av_bprint_alloc(buf, size);  in av_bprint_get_buffer()
223     *actual_size = av_bprint_room(buf);  in av_bprint_get_buffer()
224     *mem = *actual_size ? buf->str + buf->len : NULL;  in av_bprint_get_buffer()
227 void av_bprint_clear(AVBPrint *buf)  in av_bprint_clear()  argument
229     if (buf->len) {  in av_bprint_clear()
230         *buf->str = 0;  in av_bprint_clear()
231         buf->len  = 0;  in av_bprint_clear()
235 int av_bprint_finalize(AVBPrint *buf, char **ret_str)  in av_bprint_finalize()  argument
237     unsigned real_size = FFMIN(buf->len + 1, buf->size);  in av_bprint_finalize()
242         if (av_bprint_is_allocated(buf)) {  in av_bprint_finalize()
243             str = av_realloc(buf->str, real_size);  in av_bprint_finalize()
245                 str = buf->str;  in av_bprint_finalize()
246             buf->str = NULL;  in av_bprint_finalize()
250                 memcpy(str, buf->str, real_size);  in av_bprint_finalize()
256         if (av_bprint_is_allocated(buf))  in av_bprint_finalize()
257             av_freep(&buf->str);  in av_bprint_finalize()
259     buf->size = real_size;  in av_bprint_finalize()