strbuf.h

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#ifndef STRBUF_H
#define STRBUF_H
 
#include <stdint.h>
#include <stddef.h>
 
typedef struct {
    uint8_t *data;
    size_t length;
    size_t max_len;
} strbuf_t;
 
void strbuf_clear(strbuf_t *sb);
size_t strbuf_append(strbuf_t *sb, const void *data, size_t length);
size_t strbuf_printf(strbuf_t *sb, const char *format, ...);
 
#define ALLOCATE_STRBUF(NAME, MAX_SIZE) \
    uint8_t NAME##_data[(MAX_SIZE)]; \
    strbuf_t NAME = { \
        .data    = NAME##_data, \
        .length  = 0, \
        .max_len = (MAX_SIZE), \
    }
 
#endif // STRBUF_H