sxt: raw data buffer ops;
This commit is contained in:
Alexander Vdolainen
parent
61766213bb
commit
b2dff1c04f
@ -44,6 +44,7 @@
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#define SXT_EAUTH (SXT_EBASESHIFT + 13)
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#define SXT_EKEY (SXT_EBASESHIFT + 14)
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#define SXT_EHASH (SXT_EBASESHIFT + 15)
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#define SXT_ERDBRD (SXT_EBASESHIFT + 16)
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#define SXT_EINVAL (SXT_EBASESHIFT + 22)
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#define SXT_ENOMEM (SXT_EBASESHIFT + 42)
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@ -29,6 +29,8 @@
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#include <stdarg.h>
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#define SXTRDB_TERMINAT 0xdeadbeef
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#define SXTRDB_BURN (1 << 1)
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typedef struct __sxtrawdatabuffer_type {
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@ -78,9 +80,19 @@ uint32_t sxtrdb_write_raw_head(sxtrdb_t *, void *, uint32_t);
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/* parse */
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int sxtrdb_escan_va(sxtrdb_t *b, const char *fmt, int argc, va_list ap);
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int sxtrdb_escan_wot(sxtrdb_t *b, const char *fmt, int argc, ...);
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#define sxtrdb_escan(b, fmt, ...) \
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sxtrdb_escan_wot((b), (fmt), __VA_NARG__(__VA_ARGS__), __VA_ARGS__, SXTRDB_TERMINAT)
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/* print */
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uint32_t sxtrdb_print_va(sxtrdb_t *b, const char *fmt, int argc, va_list ap);
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uint32_t sxtrdb_print_wot(sxtrdb_t *b, const char *fmt, int argc, ...);
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#define sxtrdb_print(b, fmt, ...) \
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sxtrdb_print_wot((b), (fmt), __VA_NARG__(__VA_ARGS__), __VA_ARGS__, SXTRDB_TERMINAT)
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/* misc */
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/* returns length of used space in the buffer */
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uint32_t sxtrdb_length(sxtrdb_t *);
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17
sxt/core.c
17
sxt/core.c
@ -97,3 +97,20 @@ void sha512_final(unsigned char *md, SHA512CTX c) {
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SHA512_Final(md, c);
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if(c) free(c);
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}
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uint64_t ntohll(uint64_t n)
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{
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#ifdef WORDS_BIGENDIAN
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return n;
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#else /* WORDS_BIGENDIAN */
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return (((uint64_t)(n) << 56) | \
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(((uint64_t)(n) << 40) & 0xff000000000000ULL) | \
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(((uint64_t)(n) << 24) & 0xff0000000000ULL) | \
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(((uint64_t)(n) << 8) & 0xff00000000ULL) | \
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(((uint64_t)(n) >> 8) & 0xff000000ULL) | \
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(((uint64_t)(n) >> 24) & 0xff0000ULL) | \
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(((uint64_t)(n) >> 40) & 0xff00ULL) | \
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((uint64_t)(n) >> 56));
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#endif /* WORDS_BIGENDIAN */
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}
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511
sxt/rdb.c
511
sxt/rdb.c
@ -28,38 +28,67 @@
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <arpa/inet.h>
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#include <sxt/errno.h>
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#include <sxt/rdb.h>
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#if 0
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#define SXTRDB_BURN (1 << 1)
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typedef struct __sxtrawdatabuffer_type {
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char *raw;
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uint32_t rlength; /* raw buffer allocated length */
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uint32_t ulength; /* length of used allocated space */
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uint32_t curr; /* cursor for read/write operations */
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int flags;
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} sxtrdb_t;
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#endif
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extern uint64_t ntohll(uint64_t n);
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/* allocation, freeing */
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#define DEFAULT_PREALLOC_SIZE 256
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#define SXTBUF_MAXLENGTH 6*(1024*1024)
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/* allocate raw buffer with defaults preallocation */
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sxtrdb_t *sxtrdb_new(void)
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{
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return NULL;
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sxtrdb_t *b = malloc(sizeof(sxtrdb_t));
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if(!b) return NULL;
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if(!(b->raw = malloc(DEFAULT_PREALLOC_SIZE))) {
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free(b);
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b = NULL;
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} else {
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b->rlength = DEFAULT_PREALLOC_SIZE;
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b->ulength = b->curr = 0;
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b->flags = 0;
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}
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return b;
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}
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/* will do the same as sxtrdb_new but will allocate given length */
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sxtrdb_t *sxtrdb_new_palloc(uint32_t alen)
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{
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return NULL;
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sxtrdb_t *b = NULL;
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if(alen > SXTBUF_MAXLENGTH) return NULL;
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if(!(b = malloc(sizeof(sxtrdb_t)))) return NULL;
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else memset(b, 0, sizeof(sxtrdb_t));
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if(!(b->raw = malloc(alen))) {
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free(b);
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b = NULL;
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} else b->rlength = alen;
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return b;
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}
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/* free all allocated space and buffer itself */
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void sxtrdb_free(sxtrdb_t *b)
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{
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if(!b) return;
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if(b->flags & SXTRDB_BURN) {
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if(b->raw) memset(b->raw, 0, b->rlength);
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memset(b, 0, sizeof(sxtrdb_t));
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}
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if(b->raw) free(b->raw);
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free(b);
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return;
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}
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@ -68,22 +97,68 @@ void sxtrdb_free(sxtrdb_t *b)
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* ridden data, otherwise error occurs */
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uint32_t sxtrdb_read_u8(sxtrdb_t *b, uint8_t *o)
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{
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return 0;
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uint8_t u;
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if(!b || !o) return 0;
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if(!b->raw) return 0;
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if(b->curr >= b->ulength) return 0;
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u = *((uint8_t*)(b->raw + b->curr));
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b->curr += sizeof(uint8_t);
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*o = u;
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return sizeof(uint8_t);
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}
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uint32_t sxtrdb_read_u16(sxtrdb_t *b, uint16_t *o)
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{
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return 0;
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uint16_t u;
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if(!b || !o) return 0;
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if(!b->raw) return 0;
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if(b->curr >= b->ulength) return 0;
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if(b->curr + sizeof(uint16_t) > b->ulength) return 0;
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u = *((uint16_t *)(b->raw + b->curr));
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b->curr += sizeof(uint16_t);
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*o = ntohs(u);
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return sizeof(uint16_t);
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}
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uint32_t sxtrdb_read_u32(sxtrdb_t *b, uint32_t *o)
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{
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return 0;
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uint32_t u;
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if(!b || !o) return 0;
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if(!b->raw) return 0;
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if(b->curr >= b->ulength) return 0;
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if(b->curr + sizeof(uint32_t) > b->ulength) return 0;
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u = *((uint32_t *)(b->raw + b->curr));
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b->curr += sizeof(uint32_t);
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*o = ntohl(u);
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return sizeof(uint32_t);
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}
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uint32_t sxtrdb_read_u64(sxtrdb_t *b, uint64_t *o)
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{
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return 0;
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uint64_t u;
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if(!b || !o) return 0;
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if(!b->raw) return 0;
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if(b->curr >= b->ulength) return 0;
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if(b->curr + sizeof(uint64_t) > b->ulength) return 0;
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u = *((uint64_t *)(b->raw + b->curr));
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b->curr += sizeof(uint64_t);
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*o = ntohl(u);
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return sizeof(uint64_t);
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}
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/* get raw data, pointer must be allocated with at least required length,
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@ -91,6 +166,41 @@ uint32_t sxtrdb_read_u64(sxtrdb_t *b, uint64_t *o)
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*/
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uint32_t sxtrdb_read_raw(sxtrdb_t *b, void *o, uint32_t rlen)
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{
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if(!b || !o) return 0;
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if(!rlen || !b->raw) return 0;
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if(b->curr >= b->ulength) return 0;
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if(b->curr + rlen > b->ulength) return 0;
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memcpy(o, (const void*)b->raw + b->curr, rlen);
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b->curr += rlen;
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return rlen;
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}
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static int __rdb_grow(sxtrdb_t *b, uint32_t len)
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{
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uint32_t rlen;
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char *ne = NULL;
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if(!len) return -1;
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if(b->rlength + len > SXTBUF_MAXLENGTH) return -1;
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rlen = len +
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(len%DEFAULT_PREALLOC_SIZE != 0 ? (DEFAULT_PREALLOC_SIZE - len%DEFAULT_PREALLOC_SIZE) : 0);
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if(b->rlength + rlen > SXTBUF_MAXLENGTH) rlen = len;
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rlen += b->rlength;
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if(!(ne = malloc(rlen))) return -1;
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if(b->flags & SXTRDB_BURN) memset(ne, 0, rlen);
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memcpy(ne, b->raw, b->ulength);
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if(b->flags & SXTRDB_BURN) memset(b->raw, 0, b->rlength);
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free(b->raw);
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b->raw = ne;
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b->rlength = rlen;
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return 0;
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}
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@ -98,88 +208,405 @@ uint32_t sxtrdb_read_raw(sxtrdb_t *b, void *o, uint32_t rlen)
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* written data, otherwise error occurs */
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uint32_t sxtrdb_write_u8(sxtrdb_t *b, uint8_t u)
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{
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return 0;
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if(!b || !b->raw) return 0;
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if(b->ulength == b->rlength) {
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if(__rdb_grow(b, sizeof(uint8_t))) return 0;
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}
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*(uint8_t *)(b->raw + b->ulength) = u;
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b->ulength += sizeof(uint8_t);
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return sizeof(uint8_t);
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}
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uint32_t sxtrdb_write_u16(sxtrdb_t *b, uint16_t uu)
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{
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return 0;
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if(!b || !b->raw) return 0;
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if(b->ulength + sizeof(uint16_t) >= b->rlength) {
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if(__rdb_grow(b, sizeof(uint16_t))) return 0;
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}
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*(uint16_t *)(b->raw + b->ulength) = htons(uu);
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b->ulength += sizeof(uint16_t);
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return sizeof(uint16_t);
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}
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uint32_t sxtrdb_write_u32(sxtrdb_t *b, uint32_t uu)
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{
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return 0;
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if(!b || !b->raw) return 0;
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if(b->ulength + sizeof(uint32_t) >= b->rlength) {
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if(__rdb_grow(b, sizeof(uint32_t))) return 0;
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}
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*(uint32_t *)(b->raw + b->ulength) = htonl(uu);
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b->ulength += sizeof(uint32_t);
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return sizeof(uint32_t);
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}
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uint32_t sxtrdb_write_u64(sxtrdb_t *b, uint64_t uu)
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{
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return 0;
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if(!b || !b->raw) return 0;
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if(b->ulength + sizeof(uint64_t) >= b->rlength) {
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if(__rdb_grow(b, sizeof(uint64_t))) return 0;
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}
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*(uint32_t *)(b->raw + b->ulength) = ntohll(uu);
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b->ulength += sizeof(uint64_t);
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return sizeof(uint64_t);
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}
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/* write raw data with the given length */
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uint32_t sxtrdb_write_raw(sxtrdb_t *b, void *wi, uint32_t len)
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{
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return 0;
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if(!b || !b->raw) return 0;
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if(!wi || !len) return 0;
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if(b->ulength + len >= b->rlength) {
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if(__rdb_grow(b, len)) return 0;
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}
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memcpy((void *)b->raw + b->ulength, (const void *)wi, len);
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b->ulength += len;
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return sizeof(uint64_t);
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}
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/* write raw data *before* existing data */
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uint32_t sxtrdb_write_raw_head(sxtrdb_t *b, void *wi, uint32_t len)
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{
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return 0;
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char *ne;
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uint32_t rlen;
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if(!b || !b->raw) return 0;
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if(!wi || !len) return 0;
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if(b->ulength + len > b->rlength) {
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/* allocate a new one and copy it right */
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if(b->rlength + len > SXTBUF_MAXLENGTH) return -1;
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rlen = len +
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(len%DEFAULT_PREALLOC_SIZE != 0 ? (DEFAULT_PREALLOC_SIZE - len%DEFAULT_PREALLOC_SIZE) : 0);
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if(b->rlength + rlen > SXTBUF_MAXLENGTH) rlen = len;
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rlen += b->rlength;
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if(!(ne = malloc(rlen))) return -1;
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if(b->flags & SXTRDB_BURN) memset(ne, 0, rlen);
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memcpy((void *)ne + len, b->raw, b->ulength);
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if(b->flags & SXTRDB_BURN) memset(b->raw, 0, b->rlength);
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free(b->raw);
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b->raw = ne;
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b->rlength = rlen;
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} else {
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memmove((void *)b->raw + b->ulength, b->raw, b->ulength);
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}
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memcpy(b->raw, wi, len);
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b->ulength += len;
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return len;
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}
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/* parse */
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int sxtrdb_escan_va(sxtrdb_t *b, const char *fmt, int argc, va_list ap)
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{
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return 0;
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va_list ap_copy;
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union {
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uint8_t *_u8;
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uint16_t *_u16;
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uint32_t *_u32;
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uint64_t *_u64;
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void **_dp;
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char **_cstr;
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} d;
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const char *t, *last;
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uint32_t len, clen;
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int r, count;
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va_copy(ap_copy, ap);
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for(t = fmt, count = 0; *t != '\0'; t++, count++) {
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if(count > argc && argc != -1) {
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va_end(ap_copy);
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return SXT_EINVAL;
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}
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switch(*t) {
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case 'b':
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d._u8 = va_arg(ap, uint8_t *);
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len = sxtrdb_read_u8(b, d._u8);
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r = (len == sizeof(uint8_t)) ? SXT_SUCCESS : SXT_ERDBRD;
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break;
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case 'w':
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d._u16 = va_arg(ap, uint16_t *);
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len = sxtrdb_read_u16(b, d._u16);
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r = (len == sizeof(uint16_t)) ? SXT_SUCCESS : SXT_ERDBRD;
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break;
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case 'd':
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d._u32 = va_arg(ap, uint32_t *);
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len = sxtrdb_read_u32(b, d._u32);
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r = (len == sizeof(uint32_t)) ? SXT_SUCCESS : SXT_ERDBRD;
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break;
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case 'q':
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d._u64 = va_arg(ap, uint64_t *);
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len = sxtrdb_read_u64(b, d._u64);
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r = (len == sizeof(uint64_t)) ? SXT_SUCCESS : SXT_ERDBRD;
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break;
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case 's':
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d._cstr = va_arg(ap, char **);
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*d._cstr = NULL;
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len = sxtrdb_read_u32(b, &clen);
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if(len != sizeof(uint32_t)) {
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__errrbread:
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r = SXT_ERDBRD;
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break;
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}
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if(clen > SXTBUF_MAXLENGTH) goto __errrbread;
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if((*d._cstr = malloc(clen + sizeof(char))) == NULL) {
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r = SXT_ENOMEM;
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break;
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}
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len = sxtrdb_read_raw(b, *d._cstr, clen);
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if(len != clen) {
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free(*d._cstr);
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goto __errrbread;
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}
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(*d._cstr)[len] = '\0';
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d._cstr = NULL;
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r = SXT_SUCCESS;
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break;
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case 'p':
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clen = va_arg(ap, size_t);
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d._dp = va_arg(ap, void **);
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*d._dp = NULL;
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count++;
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if((*d._dp = malloc(clen)) == NULL) {
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r = SXT_ENOMEM;
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break;
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}
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len = sxtrdb_read_raw(b, *d._dp, clen);
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if(len != clen) {
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free(*d._dp);
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goto __errrbread;
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}
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d._dp = NULL;
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r = SXT_SUCCESS;
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break;
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}
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if(r != SXT_SUCCESS) break;
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}
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if(argc != -1 && argc != count) r = SXT_EINVAL;
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|
||||
if(r == SXT_SUCCESS) {
|
||||
clen = va_arg(ap, uint32_t);
|
||||
if(clen != SXTRDB_TERMINAT) {
|
||||
if(argc == -1) r = SXT_EINVAL;
|
||||
else abort();
|
||||
}
|
||||
}
|
||||
|
||||
/* clean up all the stuff on error */
|
||||
if(r != SXT_SUCCESS) {
|
||||
last = t;
|
||||
for(t = fmt; t < last; ++t) {
|
||||
switch(*t) {
|
||||
case 'b':
|
||||
case 'w':
|
||||
case 'd':
|
||||
case 'q':
|
||||
(void)va_arg(ap_copy, void *);
|
||||
break;
|
||||
case 's':
|
||||
d._cstr = va_arg(ap_copy, char **);
|
||||
if(*d._cstr) {
|
||||
memset(*d._cstr, 0, strlen(*d._cstr));
|
||||
free(*d._cstr);
|
||||
}
|
||||
break;
|
||||
case 'p':
|
||||
(void)va_arg(ap_copy, size_t);
|
||||
d._dp = va_arg(ap_copy, void **);
|
||||
if(*d._dp) free(*d._dp);
|
||||
break;
|
||||
default:
|
||||
(void)va_arg(ap_copy, void *);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
va_end(ap_copy);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
/* print */
|
||||
int sxtrdb_escan_wot(sxtrdb_t *b, const char *fmt, int argc, ...)
|
||||
{
|
||||
va_list ap;
|
||||
int r;
|
||||
|
||||
va_start(ap, argc);
|
||||
r = sxtrdb_escan_va(b, fmt, argc, ap);
|
||||
va_end(ap);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
/* print FIXME: TODO: add errno setting upon failure */
|
||||
uint32_t sxtrdb_print_va(sxtrdb_t *b, const char *fmt, int argc, va_list ap)
|
||||
{
|
||||
return 0;
|
||||
const char *t;
|
||||
char *cstr;
|
||||
union {
|
||||
uint8_t _u8;
|
||||
uint16_t _u16;
|
||||
uint32_t _u32;
|
||||
uint64_t _u64;
|
||||
void *_dp;
|
||||
} d;
|
||||
uint32_t len = 0, clen;
|
||||
int r, count;
|
||||
|
||||
for(t = fmt, count = 0; *t != '\0'; t++, count++) {
|
||||
if(count > argc && argc != -1) return 0;
|
||||
switch(*t) {
|
||||
case 'b':
|
||||
d._u8 = (uint8_t)va_arg(ap, unsigned int);
|
||||
r = sxtrdb_write_u8(b, d._u8);
|
||||
if(r != sizeof(uint8_t)) return 0;
|
||||
else len += r;
|
||||
break;
|
||||
case 'w':
|
||||
d._u16 = (uint16_t)va_arg(ap, unsigned int);
|
||||
r = sxtrdb_write_u16(b, d._u16);
|
||||
if(r != sizeof(uint16_t)) return 0;
|
||||
else len += r;
|
||||
break;
|
||||
case 'd':
|
||||
d._u32 = (uint32_t)va_arg(ap, uint32_t);
|
||||
r = sxtrdb_write_u32(b, d._u32);
|
||||
if(r != sizeof(uint32_t)) return 0;
|
||||
else len += r;
|
||||
break;
|
||||
case 'q':
|
||||
d._u64 = (uint64_t)va_arg(ap, uint64_t);
|
||||
r = sxtrdb_write_u64(b, d._u64);
|
||||
if(r != sizeof(uint64_t)) return 0;
|
||||
else len += r;
|
||||
break;
|
||||
case 's':
|
||||
cstr = (char *)va_arg(ap, char *);
|
||||
clen = strlen(cstr);
|
||||
r = sxtrdb_write_u32(b, clen);
|
||||
if(r != sizeof(uint32_t)) return 0;
|
||||
else len += r;
|
||||
r = sxtrdb_write_raw(b, cstr, clen);
|
||||
if(r != clen) return 0;
|
||||
else len += clen;
|
||||
break;
|
||||
case 'p':
|
||||
clen = va_arg(ap, size_t);
|
||||
d._dp = va_arg(ap, void *);
|
||||
count++;
|
||||
r = sxtrdb_write_raw(b, d._dp, clen);
|
||||
if(r != clen) return 0;
|
||||
else len += clen;
|
||||
break;
|
||||
default:
|
||||
return 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if(argc != count && argc != -1) return 0;
|
||||
|
||||
clen = va_arg(ap, uint32_t);
|
||||
if(clen != SXTRDB_TERMINAT) {
|
||||
if(argc == -1) return 0;
|
||||
else abort(); /* corruption */
|
||||
}
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
uint32_t sxtrdb_print_wot(sxtrdb_t *b, const char *fmt, int argc, ...)
|
||||
{
|
||||
va_list ap;
|
||||
uint32_t wrl;
|
||||
|
||||
va_start(ap, argc);
|
||||
wrl = sxtrdb_print_va(b, fmt, argc, ap);
|
||||
va_end(ap);
|
||||
|
||||
return wrl;
|
||||
}
|
||||
|
||||
/* misc */
|
||||
/* returns length of used space in the buffer */
|
||||
uint32_t sxtrdb_length(sxtrdb_t *b)
|
||||
{
|
||||
return 0;
|
||||
if(!b || !b->raw) return 0;
|
||||
|
||||
return b->ulength;
|
||||
}
|
||||
|
||||
/* returns length of allocated space in the buffer */
|
||||
uint32_t sxtrdb_alength(sxtrdb_t *b)
|
||||
{
|
||||
return 0;
|
||||
if(!b || !b->raw) return 0;
|
||||
|
||||
return b->rlength;
|
||||
}
|
||||
|
||||
/* returns length of the left data to read */
|
||||
uint32_t sxtrdb_leftlength(sxtrdb_t *b)
|
||||
{
|
||||
return 0;
|
||||
if(!b || !b->raw) return 0;
|
||||
if(b->curr > b->ulength) return 0;
|
||||
|
||||
return b->ulength - b->curr;
|
||||
}
|
||||
|
||||
/* reaturn a pointer to the raw data */
|
||||
void *sxtrdb_rdata(sxtrdb_t *b)
|
||||
{
|
||||
return NULL;
|
||||
if(!b || !b->raw) return NULL;
|
||||
|
||||
return (void *)b->raw;
|
||||
}
|
||||
|
||||
/* return pointer to the data currently being read/write */
|
||||
void *sxtrdb_rdatacur(sxtrdb_t *b)
|
||||
{
|
||||
return NULL;
|
||||
if(!b || !b->raw) return NULL;
|
||||
|
||||
if(b->curr >= b->ulength) return NULL;
|
||||
|
||||
return (void *)(b->raw + b->curr);
|
||||
}
|
||||
|
||||
/* set flags to the raw buffer */
|
||||
void sxtrdb_setflags(sxtrdb_t *b, int af)
|
||||
{
|
||||
if(!b) return;
|
||||
|
||||
b->flags |= af;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
/* exchange flags for raw buff */
|
||||
void sxtrdb_exflags(sxtrdb_t *b, int nf)
|
||||
{
|
||||
if(!b) return;
|
||||
|
||||
b->flags = nf;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
@ -189,6 +616,26 @@ void sxtrdb_exflags(sxtrdb_t *b, int nf)
|
||||
*/
|
||||
int sxtrdb_memopt(sxtrdb_t *b)
|
||||
{
|
||||
return SXT_ERROR;
|
||||
uint32_t len;
|
||||
char *ne;
|
||||
|
||||
if(!b || !b->raw) return SXT_EINVAL;
|
||||
|
||||
if((b->rlength - b->ulength) > DEFAULT_PREALLOC_SIZE) {
|
||||
len = b->ulength +
|
||||
(b->ulength%DEFAULT_PREALLOC_SIZE != 0 ?
|
||||
(DEFAULT_PREALLOC_SIZE - b->ulength%DEFAULT_PREALLOC_SIZE) : 0);
|
||||
if(!(ne = malloc(len))) return SXT_ENOMEM;
|
||||
|
||||
if(b->flags & SXTRDB_BURN) memset(ne, 0, len);
|
||||
memcpy(ne, b->raw, b->ulength);
|
||||
if(b->flags & SXTRDB_BURN) memset(b->raw, 0, b->ulength);
|
||||
free(b->raw);
|
||||
b->raw = ne;
|
||||
b->rlength = len;
|
||||
}
|
||||
|
||||
return SXT_SUCCESS;
|
||||
}
|
||||
|
||||
#undef DEFAULT_PREALLOC_SIZE
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user