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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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23
backend/gif.c
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@ -584,7 +584,7 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
State.InLen = bitmapSize;
if (!(State.pOut = (unsigned char *) malloc(lzoutbufSize))) {
if (!output_to_stdout) {
fclose(gif_file);
(void) fclose(gif_file);
}
strcpy(symbol->errtxt, "614: Insufficient memory for LZW buffer");
return ZINT_ERROR_MEMORY;
@ -596,7 +596,7 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
if (byte_out <= 0) {
free(State.pOut);
if (!output_to_stdout) {
fclose(gif_file);
(void) fclose(gif_file);
}
strcpy(symbol->errtxt, "613: Insufficient memory for LZW buffer");
return ZINT_ERROR_MEMORY;
@ -606,10 +606,25 @@ INTERNAL int gif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
/* GIF terminator */
fputc('\x3b', gif_file);
if (ferror(gif_file)) {
sprintf(symbol->errtxt, "615: Incomplete write to output (%d: %.30s)", errno, strerror(errno));
if (!output_to_stdout) {
(void) fclose(gif_file);
}
return ZINT_ERROR_FILE_WRITE;
}
if (output_to_stdout) {
fflush(gif_file);
if (fflush(gif_file) != 0) {
sprintf(symbol->errtxt, "616: Incomplete flush to output (%d: %.30s)", errno, strerror(errno));
return ZINT_ERROR_FILE_WRITE;
}
} else {
fclose(gif_file);
if (fclose(gif_file) != 0) {
sprintf(symbol->errtxt, "617: Failure on closing output file (%d: %.30s)", errno, strerror(errno));
return ZINT_ERROR_FILE_WRITE;
}
}
return 0;