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60 lines
2.6 KiB
C
60 lines
2.6 KiB
C
#ifndef NASM_SAA_H
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#define NASM_SAA_H
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#include "compiler.h"
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/*
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* Routines to manage a dynamic sequential-access array, under the
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* same restriction on maximum mallocable block. This array may be
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* written to in two ways: a contiguous chunk can be reserved of a
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* given size with a pointer returned OR single-byte data may be
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* written. The array can also be read back in the same two ways:
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* as a series of big byte-data blocks or as a list of structures
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* of a given size.
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*/
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struct SAA {
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/*
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* members `end' and `elem_len' are only valid in first link in
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* list; `rptr' and `rpos' are used for reading
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*/
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size_t elem_len; /* Size of each element */
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size_t blk_len; /* Size of each allocation block */
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size_t nblks; /* Total number of allocated blocks */
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size_t nblkptrs; /* Total number of allocation block pointers */
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size_t length; /* Total allocated length of the array */
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size_t datalen; /* Total data length of the array */
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char **wblk; /* Write block pointer */
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size_t wpos; /* Write position inside block */
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size_t wptr; /* Absolute write position */
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char **rblk; /* Read block pointer */
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size_t rpos; /* Read position inside block */
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size_t rptr; /* Absolute read position */
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char **blk_ptrs; /* Pointer to pointer blocks */
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};
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struct SAA *saa_init(size_t elem_len); /* 1 == byte */
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void saa_free(struct SAA *);
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void *saa_wstruct(struct SAA *); /* return a structure of elem_len */
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void saa_wbytes(struct SAA *, const void *, size_t); /* write arbitrary bytes */
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void saa_rewind(struct SAA *); /* for reading from beginning */
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void *saa_rstruct(struct SAA *); /* return NULL on EOA */
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const void *saa_rbytes(struct SAA *, size_t *); /* return 0 on EOA */
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void saa_rnbytes(struct SAA *, void *, size_t); /* read a given no. of bytes */
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/* random access */
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void saa_fread(struct SAA *, size_t, void *, size_t);
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void saa_fwrite(struct SAA *, size_t, const void *, size_t);
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/* dump to file */
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void saa_fpwrite(struct SAA *, FILE *);
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/* Write specific-sized values */
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void saa_write8(struct SAA *s, uint8_t v);
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void saa_write16(struct SAA *s, uint16_t v);
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void saa_write32(struct SAA *s, uint32_t v);
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void saa_write64(struct SAA *s, uint64_t v);
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void saa_wleb128u(struct SAA *, int); /* write unsigned LEB128 value */
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void saa_wleb128s(struct SAA *, int); /* write signed LEB128 value */
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#endif /* NASM_SAA_H */
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