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51 lines
1.2 KiB
51 lines
1.2 KiB
7 years ago
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#ifndef PAYLOAD_BUILDER_H
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#define PAYLOAD_BUILDER_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include "type_coerce.h"
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/**
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* This module can help you build payload arrays
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*
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* The builder performs bounds checking and prints error
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* message on overflow for easy debugging.
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*/
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typedef struct {
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uint8_t *buf;
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size_t ptr;
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size_t capacity;
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bool bigendian;
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} PayloadBuilder;
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#define pb_start(buf, capacity, bigendian) ((PayloadBuilder){buf, 0, capacity, bigendian})
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#define pb_length(pb_p) ((pb_p)->ptr)
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/** Write uint8_t to the buffer */
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bool pb_u8(PayloadBuilder *pb, uint8_t byte);
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/** Write uint16_t to the buffer. */
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bool pb_u16(PayloadBuilder *pb, uint16_t word);
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/** Write uint32_t to the buffer. */
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bool pb_u32(PayloadBuilder *pb, uint32_t word);
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/** Write char (int8_t) to the buffer. */
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#define pb_char(pb, c) pb_i8(pb, c)
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/** Write int8_t to the buffer. */
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bool pb_i8(PayloadBuilder *pb, int8_t byte);
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/** Write int16_t to the buffer. */
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bool pb_i16(PayloadBuilder *pb, int16_t word);
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/** Write int32_t to the buffer. */
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bool pb_i32(PayloadBuilder *pb, int32_t word);
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/** Write 4-byte float to the buffer. */
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bool pb_float(PayloadBuilder *pb, float f);
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#endif // PAYLOAD_BUILDER_H
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