docs.sheetjs.com/docz/static/quickjs/sheetjs.quick.c

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2023-03-12 06:25:57 +00:00
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "quickjs.h"
static char *read_file(const char *filename, size_t *sz) {
FILE *f = fopen(filename, "rb");
if(!f) return NULL;
long fsize; { fseek(f, 0, SEEK_END); fsize = ftell(f); fseek(f, 0, SEEK_SET); }
char *buf = (char *)malloc(fsize * sizeof(char));
*sz = fread((void *) buf, 1, fsize, f);
fclose(f);
return buf;
}
#define CLEANUP(v) { JS_FreeContext(ctx); JS_FreeRuntime(rt); return v; }
#define FREE(v) JS_FreeValue(ctx, v);
#define VALIDATE(v) { if(JS_IsException(v)) CLEANUP(1) }
#define VALINIT(xx,vv) \
JSValue xx = vv;\
VALIDATE(xx)
#define VALPROP(xx,vv,pp) VALINIT(xx, JS_GetPropertyStr(ctx, vv, pp))
int main(int argc, char *argv[]) {
JSRuntime *rt = JS_NewRuntime();
JSContext *ctx = JS_NewContext(rt);
/* load library */
{
size_t len; char * buf = read_file("xlsx.full.min.js", &len);
VALIDATE(JS_Eval(ctx, buf, len, "<input>", 0))
free(buf);
}
VALINIT(global, JS_GetGlobalObject(ctx))
VALPROP(XLSX, global, "XLSX");
FREE(global)
/* print version */
{
VALPROP(version, XLSX, "version")
size_t vlen; const char *vers = JS_ToCStringLen(ctx, &vlen, version);
printf("Version: %s\n", vers);
FREE(version)
}
/* parse workbook */
JSValue wb;
{
/* read file */
size_t dlen; uint8_t * dbuf = (uint8_t *)read_file(argv[1], &dlen);
/* load data into array buffer */
JSValue ab = JS_NewArrayBuffer(ctx, dbuf, dlen, NULL, NULL, 0);
{
VALPROP(byteLen, ab, "byteLength")
uint32_t byteLength; JS_ToUint32(ctx, &byteLength, byteLen);
FREE(byteLen)
printf("Size: %d\n", byteLength);
}
/* call XLSX.read(ab) */
{
VALPROP(XLSX_read, XLSX, "read");
JSValue args[] = { ab };
wb = JS_Call(ctx, XLSX_read, XLSX, 1, args);
FREE(XLSX_read)
}
/* cleanup */
FREE(ab)
free(dbuf);
}
/* print CSV of first worksheet */
{
/* get first worksheet */
JSValue ws;
{
/* get name of first sheet */
const char *wsname;
{
JSValue SheetNames = JS_GetPropertyStr(ctx, wb, "SheetNames");
JSValue Sheet1 = JS_GetPropertyStr(ctx, SheetNames, "0");
size_t wslen; wsname = JS_ToCStringLen(ctx, &wslen, Sheet1);
FREE(Sheet1)
FREE(SheetNames)
}
printf("Worksheet Name: %s\n", wsname);
/* get worksheet object */
{
VALPROP(Sheets, wb, "Sheets");
ws = JS_GetPropertyStr(ctx, Sheets, wsname);
FREE(Sheets)
}
}
/* print CSV */
{
VALPROP(utils, XLSX, "utils")
VALPROP(sheet_to_csv, utils, "sheet_to_csv")
JSValue args[] = { ws };
JSValue csv = JS_Call(ctx, sheet_to_csv, utils, 1, args);
FREE(sheet_to_csv)
FREE(utils)
size_t csvlen; const char *csvstr = JS_ToCStringLen(ctx, &csvlen, csv);
printf("%s\n", csvstr);
FREE(csv)
}
FREE(ws)
}
FREE(wb)
FREE(XLSX)
CLEANUP(0)
}