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53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
#include <llarp/buffer.h>
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#include <stdarg.h>
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#include <stdio.h>
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extern "C" {
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size_t llarp_buffer_size_left(llarp_buffer_t* buff) {
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size_t diff = buff->cur - buff->base;
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if (diff > buff->sz)
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return 0;
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else
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return buff->sz - diff;
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}
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bool llarp_buffer_writef(llarp_buffer_t* buff, const char* fmt, ...) {
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int written;
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size_t sz = llarp_buffer_size_left(buff);
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va_list args;
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va_start(args, fmt);
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written = snprintf(buff->cur, sz, fmt, args);
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va_end(args);
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if (written == -1) return false;
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buff->sz += written;
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return true;
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}
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bool llarp_buffer_write(llarp_buffer_t* buff, const void* data, size_t sz) {
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size_t left = llarp_buffer_size_left(buff);
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if (left >= sz) {
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memcpy(buff->cur, data, sz);
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buff->cur += sz;
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return true;
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}
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return false;
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}
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bool llarp_buffer_readfile(llarp_buffer_t* buff, FILE* f, llarp_alloc* mem) {
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ssize_t len;
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fseek(f, 0, SEEK_END);
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len = ftell(f);
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rewind(f);
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if (len > 0) {
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buff->base = static_cast<char*>(mem->alloc(len, 8));
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buff->cur = buff->base;
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buff->sz = len;
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size_t sz = fread(buff->base, len, 1, f);
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rewind(f);
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return sz == len;
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}
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return false;
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}
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}
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