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- BMP/EMF/EPS/GIF/PCX/PNG/SVG/TIF/TXT: check for errors on writing

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to output file; ZBarcode_Encode_File: check `fseek()` for errors
  (ticket #275)
- man page: fix Code 11 check digit info
- manual/man page: document octal escape; Code 128 subset/mode ->
  Code Set
This commit is contained in:
gitlost 2022-12-19 16:28:15 +00:00
parent a54bdc0299
commit 268fdd7fc2
18 changed files with 318 additions and 140 deletions
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24
backend/png.c
View file

@ -245,7 +245,7 @@ INTERNAL int png_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
if (!png_ptr) {
strcpy(symbol->errtxt, "633: Insufficient memory for PNG write structure buffer");
if (!output_to_stdout) {
fclose(outfile);
(void) fclose(outfile);
}
return ZINT_ERROR_MEMORY;
}
@ -255,7 +255,7 @@ INTERNAL int png_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
png_destroy_write_struct(&png_ptr, NULL);
strcpy(symbol->errtxt, "634: Insufficient memory for PNG info structure buffer");
if (!output_to_stdout) {
fclose(outfile);
(void) fclose(outfile);
}
return ZINT_ERROR_MEMORY;
}
@ -264,7 +264,7 @@ INTERNAL int png_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
if (setjmp(wpng_error.jmpbuf)) {
png_destroy_write_struct(&png_ptr, &info_ptr);
if (!output_to_stdout) {
fclose(outfile);
(void) fclose(outfile);
}
return ZINT_ERROR_MEMORY;
}
@ -343,10 +343,24 @@ INTERNAL int png_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
/* make sure we have disengaged */
png_destroy_write_struct(&png_ptr, &info_ptr);
if (ferror(outfile)) {
sprintf(symbol->errtxt, "638: Incomplete write to output (%d: %.30s)", errno, strerror(errno));
if (!output_to_stdout) {
(void) fclose(outfile);
}
return ZINT_ERROR_FILE_WRITE;
}
if (output_to_stdout) {
fflush(outfile);
if (fflush(outfile) != 0) {
sprintf(symbol->errtxt, "639: Incomplete flush to output (%d: %.30s)", errno, strerror(errno));
return ZINT_ERROR_FILE_WRITE;
}
} else {
fclose(outfile);
if (fclose(outfile) != 0) {
sprintf(symbol->errtxt, "960: Failure on closing output file (%d: %.30s)", errno, strerror(errno));
return ZINT_ERROR_FILE_WRITE;
}
}
return 0;