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Refine batch processing.

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Try to remove possibility of stack smashing or infey loops.
Add detection of CRLF formatted input files.
This commit is contained in:
Robin Stuart 2010-12-26 17:09:18 +00:00
parent d6a733d517
commit e2f35eaf39
1 changed files with 23 additions and 3 deletions
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26
frontend/main.c
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@ -200,10 +200,15 @@ int batch_process(struct zint_symbol *symbol, char *filename)
char adjusted[2]; char adjusted[2];
memset(buffer, 0, sizeof(unsigned char) * 7100); memset(buffer, 0, sizeof(unsigned char) * 7100);
if(symbol->outfile[0] = '\0') { if(symbol->outfile[0] == '\0') {
strcpy(format_string, "$$$$$.png"); strcpy(format_string, "$$$$$.png");
} else { } else {
strcpy(format_string, symbol->outfile); if(strlen(format_string) < 127) {
strcpy(format_string, symbol->outfile);
} else {
strcpy(symbol->errtxt, "Format string too long");
return ERROR_INVALID_DATA;
}
} }
memset(adjusted, 0, sizeof(char) * 2); memset(adjusted, 0, sizeof(char) * 2);
@ -220,6 +225,11 @@ int batch_process(struct zint_symbol *symbol, char *filename)
do { do {
character = fgetc(file); character = fgetc(file);
if(character == '\n') { if(character == '\n') {
if(buffer[posn - 1] == '\r') {
/* CR+LF - assume Windows formatting and remove CR */
posn--;
buffer[posn] = '\0';
}
inpos = 0; inpos = 0;
local_line_count = line_count; local_line_count = line_count;
memset(number, 0, sizeof(char) * 12); memset(number, 0, sizeof(char) * 12);
@ -290,7 +300,17 @@ int batch_process(struct zint_symbol *symbol, char *filename)
buffer[posn] = character; buffer[posn] = character;
posn++; posn++;
} }
} while (!feof(file)); if(posn > 7090) {
fprintf(stderr, "On line %d: Input data too long\n", line_count);
do {
character = fgetc(file);
} while((!feof(file)) && (character != '\n'));
}
} while ((!feof(file)) && (line_count < 2000000000));
if(character != '\n') {
fprintf(stderr, "Warning: No newline at end of file\n");
}
fclose(file); fclose(file);
return error_number; return error_number;