forked from sheetjs/sheetjs
SheetJS
f03e32fc9a
- frameworks: react, react-native, preact, next.js, weex, nuxt.js - deployments: nodejs server, duktape, chakra, electron, nw.js
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
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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 "duktape.h"
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#define FAIL_LOAD { \
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duk_push_undefined(ctx); \
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perror("Error in load_file"); \
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return 1; \
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}
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static char *read_file(const char *filename, size_t *sz) {
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FILE *f = fopen(filename, "rb");
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if(!f) return NULL;
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long fsize; { fseek(f, 0, SEEK_END); fsize = ftell(f); fseek(f, 0, SEEK_SET); }
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char *buf = (char *)malloc(fsize * sizeof(char));
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*sz = fread((void *) buf, 1, fsize, f);
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fclose(f);
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return buf;
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}
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static duk_int_t eval_file(duk_context *ctx, const char *filename) {
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size_t len; char *buf = read_file(filename, &len);
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if(!buf) FAIL_LOAD
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duk_push_lstring(ctx, (const char *)buf, (duk_size_t)len);
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duk_int_t retval = duk_peval(ctx);
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duk_pop(ctx);
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return retval;
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}
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static duk_int_t load_file(duk_context *ctx, const char *filename, const char *var) {
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size_t len; char *buf = read_file(filename, &len);
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if(!buf) FAIL_LOAD
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duk_push_external_buffer(ctx);
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duk_config_buffer(ctx, -1, buf, len);
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duk_put_global_string(ctx, var);
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return 0;
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}
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static duk_int_t save_file(duk_context *ctx, const char *filename, const char *var) {
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duk_get_global_string(ctx, var);
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duk_size_t sz;
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char *buf = (char *)duk_get_buffer_data(ctx, -1, &sz);
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if(!buf) return 1;
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FILE *f = fopen(filename, "wb"); fwrite(buf, 1, sz, f); fclose(f);
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return 0;
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}
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#define FAIL(cmd) { \
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printf("error in %s: %s\n", cmd, duk_safe_to_string(ctx, -1)); \
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duk_destroy_heap(ctx); \
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return res; \
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}
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#define DOIT(cmd) duk_eval_string_noresult(ctx, cmd);
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int main(int argc, char *argv[]) {
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duk_int_t res = 0;
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/* initialize */
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duk_context *ctx = duk_create_heap_default();
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/* duktape does not expose a standard "global" by default */
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DOIT("var global = (function(){ return this; }).call(null);");
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/* load library */
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res = eval_file(ctx, "xlsx.duktape.js");
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if(res != 0) FAIL("library load")
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/* get version string */
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duk_eval_string(ctx, "XLSX.version");
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printf("SheetJS library version %s\n", duk_get_string(ctx, -1));
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duk_pop(ctx);
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/* read file */
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res = load_file(ctx, "sheetjs.xlsx", "buf");
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if(res != 0) FAIL("load sheetjs.xlsx")
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/* parse workbook */
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DOIT("wb = XLSX.read(buf, {type:'buffer'});");
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DOIT("ws = wb.Sheets[wb.SheetNames[0]]");
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/* print CSV */
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duk_eval_string(ctx, "XLSX.utils.sheet_to_csv(ws)");
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printf("%s\n", duk_get_string(ctx, -1));
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duk_pop(ctx);
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/* change cell A1 to 3 */
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DOIT("ws['A1'].v = 3; delete ws['A1'].w;");
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/* write file */
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DOIT("newbuf = XLSX.write(wb, {type:'buffer', bookType:'xlsx'})");
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res = save_file(ctx, "sheetjsw.xlsx", "newbuf");
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if(res != 0) FAIL("save sheetjsw.xlsx")
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/* cleanup */
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duk_destroy_heap(ctx);
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return res;
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}
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