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https://github.com/idris-lang/Idris2.git
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5c9f8e36a1
* Fix symbom mangling
* Revert "Fix symbom mangling"
This reverts commit 6481e80155.
* Fix typo
* [RefC] Add missed prims of setBuffer* .
* [ fix ] formatting
* [ re #2609 ] Use 'UInt' instead of 'Word'
More descriptive/to the point / Less assumed knowledge.
There are no *LE suffixes for UInt8, since endianness is to do with
multiple bytes and UInt8 is a single one.
Co-authored-by: Guillaume Allais <guillaume.allais@ens-lyon.org>
Co-authored-by: Thomas E. Hansen <teh6@st-andrews.ac.uk>
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
#include "buffer.h"
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#include "refc_util.h"
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#include <string.h>
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#include <sys/stat.h>
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void *newBuffer(int bytes) {
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size_t size = sizeof(Buffer) + bytes * sizeof(uint8_t);
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Buffer *buf = malloc(size);
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if (buf == NULL) {
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return NULL;
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}
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buf->size = bytes;
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memset(buf->data, 0, bytes);
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return (void *)buf;
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}
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static void assert_valid_range(Buffer *buf, int64_t offset, int64_t len) {
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IDRIS2_REFC_VERIFY(offset >= 0, "offset (%lld) < 0", (long long)offset);
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IDRIS2_REFC_VERIFY(len >= 0, "len (%lld) < 0", (long long)offset);
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IDRIS2_REFC_VERIFY(offset + len <= buf->size,
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"offset (%lld) + len (%lld) > buf.size (%lld)",
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(long long)offset, (long long)len, (long long)buf->size);
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}
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void copyBuffer(void *from, int from_offset, int len, void *to, int to_offset) {
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Buffer *bfrom = from;
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Buffer *bto = to;
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assert_valid_range(bfrom, from_offset, len);
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assert_valid_range(bto, to_offset, len);
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memcpy(bto->data + to_offset, bfrom->data + from_offset, len);
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}
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int getBufferSize(void *buffer) { return ((Buffer *)buffer)->size; }
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void setBufferUIntLE(void *b, int loc, uint64_t val, size_t len) {
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assert_valid_range((Buffer *)b, loc, len);
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while (len--) {
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((Buffer *)b)->data[loc++] = (uint8_t)val;
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val >>= 8;
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}
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}
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uint64_t getBufferUIntLE(void *b, int loc, size_t len) {
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assert_valid_range((Buffer *)b, loc, len);
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uint64_t r = 0;
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loc += len;
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while (len--) {
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r <<= 8;
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r += (uint8_t)(((Buffer *)b)->data[--loc]);
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}
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return r;
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}
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void setBufferDouble(void *buffer, int loc, double val) {
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union {
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double d;
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uint64_t i;
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} tmp;
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tmp.d = val;
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setBufferUIntLE(buffer, loc, tmp.i, 8);
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}
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void setBufferString(void *buffer, int loc, char *str) {
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Buffer *b = buffer;
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size_t len = strlen(str);
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assert_valid_range(b, loc, len);
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memcpy((b->data) + loc, str, len);
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}
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double getBufferDouble(void *buffer, int loc) {
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union {
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double d;
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uint64_t i;
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} tmp;
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tmp.i = getBufferUIntLE(buffer, loc, 8);
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return tmp.d;
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}
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char *getBufferString(void *buffer, int loc, int len) {
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Buffer *b = buffer;
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assert_valid_range(b, loc, len);
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char *s = (char *)(b->data + loc);
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char *rs = malloc(len + 1);
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strncpy(rs, s, len);
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rs[len] = '\0';
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return rs;
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}
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