mirror of
https://github.com/extism/extism.git
synced 2026-01-11 06:47:58 -05:00
c4b82e3eda
This includes three fixes: * link static library by absolute path (should fix static linking on Mac/ with `lld`) * link static library with `-framework Security` on Mac * link `libpthread` , this should be a no-op on systems with modern libc, but should fix static linking on systems with glibc pre 2.34 see https://developers.redhat.com/articles/2021/12/17/why-glibc-234-removed-libpthread and error http://www.cpantesters.org/cpan/report/669fdfc8-25a4-11ef-9502-51fb6d8775ea --------- Co-authored-by: zach <zachshipko@gmail.com> Co-authored-by: zach <zach@dylibso.com>
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
#include "../runtime/extism.h"
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <unistd.h>
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void log_handler(const char *line, ExtismSize length) {
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fwrite(line, length, 1, stderr);
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}
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void hello_world(ExtismCurrentPlugin *plugin, const ExtismVal *inputs,
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uint64_t n_inputs, ExtismVal *outputs, uint64_t n_outputs,
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void *data) {
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puts("Hello from C!");
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puts(data);
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ExtismSize ptr_offs = inputs[0].v.i64;
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uint8_t *buf = extism_current_plugin_memory(plugin) + ptr_offs;
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uint64_t length = extism_current_plugin_memory_length(plugin, ptr_offs);
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fwrite(buf, length, 1, stdout);
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fputc('\n', stdout);
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outputs[0].v.i64 = inputs[0].v.i64;
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}
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void free_data(void *x) { puts("Freeing userdata"); }
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uint8_t *read_file(const char *filename, size_t *len) {
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FILE *fp = fopen(filename, "rb");
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if (fp == NULL) {
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return NULL;
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}
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fseek(fp, 0, SEEK_END);
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size_t length = ftell(fp);
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fseek(fp, 0, SEEK_SET);
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uint8_t *data = malloc(length);
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if (data == NULL) {
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fclose(fp);
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return NULL;
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}
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assert(fread(data, 1, length, fp) == length);
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fclose(fp);
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*len = length;
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return data;
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}
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int main(int argc, char *argv[]) {
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if (argc < 2) {
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fputs("Not enough arguments\n", stderr);
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exit(1);
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}
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extism_log_custom("extism=trace,cranelift=trace");
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size_t len = 0;
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uint8_t *data = read_file("../wasm/code-functions.wasm", &len);
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ExtismValType inputs[] = {EXTISM_PTR};
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ExtismValType outputs[] = {EXTISM_PTR};
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ExtismFunction *f =
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extism_function_new("hello_world", inputs, 1, outputs, 1, hello_world,
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"Hello, again!", free_data);
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char *errmsg = NULL;
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ExtismPlugin *plugin = extism_plugin_new(
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data, len, (const ExtismFunction **)&f, 1, true, &errmsg);
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free(data);
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if (plugin == NULL) {
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puts(errmsg);
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extism_plugin_new_error_free(errmsg);
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exit(1);
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}
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assert(extism_plugin_call(plugin, "count_vowels", (uint8_t *)argv[1],
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strlen(argv[1])) == 0);
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ExtismSize out_len = extism_plugin_output_length(plugin);
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const uint8_t *output = extism_plugin_output_data(plugin);
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write(STDOUT_FILENO, output, out_len);
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write(STDOUT_FILENO, "\n", 1);
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extism_plugin_free(plugin);
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extism_function_free(f);
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extism_log_drain(log_handler);
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return 0;
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}
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