hermes-windows-x64
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@ -135,6 +135,30 @@ static char *read_file(const char *filename, size_t *sz) {
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size_t sz; char *xlsx_full_min_js = read_file("xlsx.full.min.js", &sz);
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```
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:::caution pass
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For Windows applications, the string must be null-terminated:
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```cpp
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/* Hermes-Windows requires the null terminator */
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static char *read_file_null(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) + 1; 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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buf[fsize - 1] = 0;
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fclose(f);
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return buf;
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}
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// ...
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/* read SheetJS library from filesystem */
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size_t sz; char *xlsx_full_min_js = read_file_null("xlsx.full.min.js", &sz);
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```
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:::
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_Hermes Wrapper_
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Hermes does not provide a friendly way to prepare JavaScript code stored in a
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@ -343,13 +367,20 @@ This demo was tested in the following deployments:
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| `linux-x64` | `49e1930` | 2023-09-22 |
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| `linux-arm` | `70af78b` | 2023-08-27 |
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The main Hermes source tree does not have Windows support. The `hermes-windows`
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fork, which powers React Native for Windows, does have built-in support[^5]
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| Architecture | Git Commit | Date |
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|:-------------|:-----------|:-----------|
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| `win10-x64` | `c7a4a82` | 2023-09-27 |
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:::
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0) Install [dependencies](https://hermesengine.dev/docs/building-and-running/#dependencies)
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<details><summary><b>Installation Notes</b> (click to show)</summary>
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The official guidance[^5] has been verified in macOS and HoloOS (Linux).
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The official guidance[^6] has been verified in macOS and HoloOS (Linux).
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On macOS:
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@ -424,6 +455,158 @@ curl -LO https://sheetjs.com/pres.numbers`}
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If successful, the program will print the library version number and the
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contents of the first sheet as CSV rows.
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### Windows Example
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0) Install dependencies.
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<details><summary><b>Installation Notes</b> (click to show)</summary>
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CMake and Visual Studio with "Desktop development with C++" workload must be
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installed. In addition, the following Spectre-mitigated libs must be added:
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- MSVC C++ Spectre-mitigated libs (Latest)
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- C++ ATL for latest build tools with Spectre Mitigations
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- C++ MFC for latest build tools with Spectre Mitigations
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The easiest way to install is to select "Individual components" and search for
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"spectre latest" (no quotation marks). Pick each option for the relevant CPU.
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</details>
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1) Set up `depot_tools`.
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[`depot_tools.zip`](https://storage.googleapis.com/chrome-infra/depot_tools.zip)
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must be downloaded and extracted to `c:\src\depot_tools\`.
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:::note pass
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This ZIP has a number of hidden files and folders (including `.git`) which
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should be extracted along with the normal files.
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:::
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Add the path `c:\src\depot_tools\` to the User `PATH` environment variable
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<details><summary><b>Environment Variable Setup</b> (click to show)</summary>
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Type `env` in the search bar and select "Edit the system environment variables".
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In the new window, click the "Environment Variables..." button.
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In the new window, look for the "User variables" section. Select "Path" in the
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list and click "Edit".
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In the new window, click "New" and type `c:\src\depot_tools` and press Enter.
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Select the row and repeatedly click "Move Up" until it is the first entry.
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Click "OK" in each window (3 windows) and restart your computer.
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</details>
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2) Delete `c:\src\depot_tools\ninja` if it exists, then download the
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[official Windows release](https://github.com/ninja-build/ninja/releases/download/v1.11.1/ninja-win.zip)
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and move the `ninja.exe` into `c:\src\depot_tools`. If a `ninja.exe` exists in
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the folder, replace the existing program.
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3) Make a project directory:
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```bash
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mkdir sheetjs-hermes
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cd sheetjs-hermes
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```
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4) Clone the `hermes-windows` repo:
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```bash
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git clone https://github.com/microsoft/hermes-windows
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cd hermes-windows
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git checkout c7a4a82
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cd ..
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```
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:::note pass
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If there are errors related to SSL or certificates or `CApath`, temporarily
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disable SSL in Git:
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```bash
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git config --global http.sslVerify false
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git clone https://github.com/microsoft/hermes-windows
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git config --global http.sslVerify true
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```
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:::
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5) Build the library:
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```bash
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cd hermes-windows
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.\.ado\scripts\cibuild.ps1 -AppPlatform win32 -Platform x64 -ToolsPlatform x64
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cd ..
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```
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:::note pass
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The script may fail with the message:
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> cannot be loaded because running scripts is disabled on this system
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In a "Run as Administrator" powershell window, run the following command:
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```
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Set-ExecutionPolicy -ExecutionPolicy RemoteSigned
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```
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:::
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6) Copy every generated `.lib` and `.dll` file into the main folder:
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```powershell
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dir -r -Path .\hermes-windows\workspace\build\win32-x64-debug\ -Filter "*.dll" | Copy-Item -Destination .\
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dir -r -Path .\hermes-windows\workspace\build\win32-x64-debug\ -Filter "*.lib" | Copy-Item -Destination .\
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```
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7) Download [`sheetjs-hermes.cpp`](pathname:///hermes/sheetjs-hermesw.cpp):
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```bash
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curl -LO https://docs.sheetjs.com/hermes/sheetjs-hermesw.cpp
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```
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8) Build the application:
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```powershell
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cl /MDd sheetjs-hermesw.cpp DbgHelp.lib *.lib /I hermes-windows\API /I hermes-windows\include /I hermes-windows\public\ /I hermes-windows\API\jsi
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```
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:::caution pass
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If `cl` is not found, run the command in the "Native Tools Command Prompt"
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:::
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9) Download the SheetJS Standalone script and the test file. Save both files in
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the project directory:
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<ul>
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<li><a href={`https://cdn.sheetjs.com/xlsx-${current}/package/dist/xlsx.full.min.js`}>xlsx.full.min.js</a></li>
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<li><a href="https://sheetjs.com/pres.numbers">pres.numbers</a></li>
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</ul>
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<CodeBlock language="bash">{`\
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curl -LO https://cdn.sheetjs.com/xlsx-${current}/package/dist/xlsx.full.min.js
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curl -LO https://sheetjs.com/pres.numbers`}
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</CodeBlock>
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10) Run the application:
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```bash
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.\sheetjs-hermesw.exe pres.numbers
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```
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If successful, the program will print the library version number and the
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contents of the first sheet as CSV rows.
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### CLI Test
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:::note
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@ -493,4 +676,5 @@ If successful, the script will print CSV data from the test file.
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[^2]: See ["Workbook Object"](/docs/csf/book)
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[^3]: See ["Workbook Object"](/docs/csf/book)
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[^4]: See [`sheet_to_csv` in "Utilities"](/docs/api/utilities/csv#csv-output)
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[^5]: See ["Dependencies" in "Building and Running"](https://hermesengine.dev/docs/building-and-running/#dependencies) in the Hermes Documentation
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[^5]: See [`microsoft/hermes-windows`](https://github.com/microsoft/hermes-windows) on GitHub
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[^6]: See ["Dependencies" in "Building and Running"](https://hermesengine.dev/docs/building-and-running/#dependencies) in the Hermes Documentation
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@ -55,7 +55,7 @@ only be used when there is no safe way to pass `ArrayBuffer` or `Uint8Array`.
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**Byte Conventions**
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Java has no native concept of unsigned bytes. Values in a `byte[]` are clamped
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Java has no native concept of unsigned bytes. Values in a `byte[]` are limited
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to the range `-128 .. 127`. They need to be fixed within the JS engine.
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Some engines support typed arrays. The `Uint8Array` constructor will fix values:
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117
docz/static/hermes/sheetjs-hermesw.cpp
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117
docz/static/hermes/sheetjs-hermesw.cpp
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@ -0,0 +1,117 @@
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/* sheetjs-hermesw.cpp Copyright (c) SheetJS LLC. */
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#include <iostream>
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#include "hermes/hermes.h"
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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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/* Hermes-Windows requires the null terminator */
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static char *read_file_null(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) + 1; 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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buf[fsize - 1] = 0;
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fclose(f);
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return buf;
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}
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/* Unfortunately the library provides no C-friendly Buffer classes */
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class CBuffer : public facebook::jsi::Buffer {
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public:
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CBuffer(const uint8_t *data, size_t size) : buf(data), sz(size) {}
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size_t size() const override { return sz; }
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const uint8_t *data() const override { return buf; }
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private:
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const uint8_t *buf;
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size_t sz;
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};
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/* ArrayBuffer constructor expects MutableBuffer*/
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class CMutableBuffer : public facebook::jsi::MutableBuffer {
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public:
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CMutableBuffer(uint8_t *data, size_t size) : buf(data), sz(size) {}
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size_t size() const override { return sz; }
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uint8_t *data() override { return buf; }
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private:
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uint8_t *buf;
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size_t sz;
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};
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int main(int argc, char **argv) {
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std::unique_ptr<facebook::jsi::Runtime> rt(facebook::hermes::makeHermesRuntime());
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/* setup */
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try {
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auto src = std::make_shared<facebook::jsi::StringBuffer>(
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"var global = (function(){ return this; }).call(null);"
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"var console = { log: function(x) { print(x); } };"
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);
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auto js = rt->prepareJavaScript(src, std::string("<eval>"));
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rt->evaluatePreparedJavaScript(js);
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} catch (const facebook::jsi::JSIException &e) {
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std::cerr << "JavaScript terminated via uncaught exception: " << e.what() << '\n';
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return 1;
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}
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/* load SheetJS library */
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try {
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size_t sz; char *xlsx_full_min_js = read_file_null("xlsx.full.min.js", &sz);
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auto src = std::make_shared<CBuffer>(CBuffer((uint8_t *)xlsx_full_min_js, sz));
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auto js = rt->prepareJavaScript(src, std::string("xlsx.full.min.js"));
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rt->evaluatePreparedJavaScript(js);
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} catch (const facebook::jsi::JSIException &e) {
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std::cerr << "JavaScript terminated via uncaught exception: " << e.what() << '\n';
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return 1;
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}
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/* print library version */
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try {
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auto src = std::make_shared<facebook::jsi::StringBuffer>(
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"console.log('SheetJS Library Version: ' + XLSX.version)"
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);
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auto js = rt->prepareJavaScript(src, std::string("<eval>"));
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rt->evaluatePreparedJavaScript(js);
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} catch (const facebook::jsi::JSIException &e) {
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std::cerr << "JavaScript terminated via uncaught exception: " << e.what() << '\n';
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return 1;
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}
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try {
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/* load payload as ArrayBuffer */
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size_t sz; char *data = read_file(argv[1], &sz);
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auto payload = std::make_shared<CMutableBuffer>(CMutableBuffer((uint8_t *)data, sz));
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auto ab = facebook::jsi::ArrayBuffer(*rt, payload);
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/* define stub function to read and convert first sheet to CSV */
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auto src = std::make_shared<facebook::jsi::StringBuffer>(
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"(function(buf) {"
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"var wb = XLSX.read(buf);"
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"return XLSX.utils.sheet_to_csv(wb.Sheets[wb.SheetNames[0]]);"
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"})"
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);
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auto js = rt->prepareJavaScript(src, std::string("<eval>"));
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auto func = rt->evaluatePreparedJavaScript(js);
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/* call stub function and capture result */
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auto csv = func.asObject(*rt).asFunction(*rt).call(*rt, ab);
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/* interpret as utf8 and print to stdout */
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std::string str = csv.getString(*rt).utf8(*rt);
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std::cout << str << std::endl;
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} catch (const facebook::jsi::JSIException &e) {
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std::cerr << "JavaScript terminated via uncaught exception: " << e.what() << std::endl;
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return 1;
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}
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return 0;
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}
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