invalid unicode string issue in tests/main.c

[rayamhk]

For tests/main.c, I got the following message from console:

PDF Error: -22 - Invalid unicode string at position 28 in
And special stuff €ÜŽžŠšÁ that áüöä should ÄÜÖß— “”‘’ brea

It seem just for pdf_add_text_wrap() only and the text is missing. I try to replace the €ÜŽžŠšÁ with €ÜŽžšÁ, no error reported and text is shown normally.

[AndreRenaud]

Can you submit an example bit of code? I'm not entirely sure what the error is here.

[rayamhk]

Here is cut down version of tests/main.c

#include <locale.h>
#include <stdio.h>
#include <string.h>

#include "pdfgen.h"

int main(int argc, char *argv[])
{
    struct pdf_info info = {.creator = "My software",
                            .producer = "My software",
                            .title = "My document",
                            .author = "My name",
                            .subject = "My subject"};
    struct pdf_doc *pdf = pdf_create(PDF_A4_WIDTH, PDF_A4_HEIGHT, &info);
    struct pdf_object *first_page, *second_page;
    float height, width;
    int err;

    setlocale(LC_ALL, ""); // <-- everything seem ok after comment out this line

    pdf_append_page(pdf);
    first_page = pdf_get_page(pdf, 1);

    pdf_add_text_wrap(
        pdf, NULL,
        "...\nAnd special stuff €ÜŽžŠšÁ that áüöä should ÄÜÖß— “”‘’ break\n...",
        16, 60, 800, 0, PDF_RGB(0, 0, 0), 300, PDF_ALIGN_JUSTIFY, &height);

    pdf_save(pdf, "output.pdf");

    const char *err_str = pdf_get_err(pdf, &err);
    if (err_str) {
        fprintf(stderr, "PDF Error: %d - %s\n", err, err_str);
        pdf_destroy(pdf);
        return -1;
    }
    pdf_destroy(pdf);

    return 0;
}

Finally, the problem is solved by comment out the code setlocle(LC_ALL,""); (just dont known the reason why ^_^).
Thank you for your attention.

[AndreRenaud]

Oof. C Locales are a nightmare. If you don't have that, you run the risk that C will decide to print floating point values as "5,123", instead of "5.123" (if you're using German for example). But the PDF standard requires that they're printed as 5.123 in the document (we using printf to output the floating point values). The 'correct' answer is that we shouldn't use printf, we should format them ourselves. But that's a lot of work that I haven't done 😄