26 lines
789 B
C
26 lines
789 B
C
#include <libreborn/string.h>
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// Sanitize String
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#define MINIMUM_SAFE_CHARACTER 32
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#define MAXIMUM_SAFE_CHARACTER 126
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void sanitize_string(char **str, int max_length, unsigned int allow_newlines) {
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// Store Message Length
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int length = strlen(*str);
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// Truncate Message
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if (max_length != -1 && length > max_length) {
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(*str)[max_length] = '\0';
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length = max_length;
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}
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// Loop Through Message
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for (int i = 0; i < length; i++) {
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if (allow_newlines && ((*str)[i] == '\n' || (*str)[i] == '\r')) {
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continue;
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}
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unsigned char c = (unsigned char) (*str)[i];
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if (c < MINIMUM_SAFE_CHARACTER || c > MAXIMUM_SAFE_CHARACTER) {
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// Replace Illegal Character
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(*str)[i] = '?';
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}
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}
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}
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