#include <stddef.h> //FIXME out gets silently truncated if outsize is too small size_t escape(char* in, char* out, size_t outsize) { size_t l = 0; while(*in && l + 3 < outsize) { switch(*in) { case '\n': *out++ = '\\'; l++; *out = 'n'; break; case '\r': *out++ = '\\'; l++; *out = 'r'; break; case '\t': *out++ = '\\'; l++; *out = 't'; break; case '\\': *out++ = '\\'; l++; *out = '\\'; break; case '"': *out++ = '\\'; l++; *out = '"'; break; case '\v': *out++ = '\\'; l++; *out = '\v'; break; case '\?': *out++ = '\\'; l++; *out = '\?'; break; case '\f': *out++ = '\\'; l++; *out = '\f'; break; default: *out = *in; } in++; out++; l++; } *out = 0; return l; } #include <assert.h> #include <stdlib.h> size_t unescape(char* in, char *out, size_t outsize) { size_t l = 0; while(*in && l + 2 < outsize) { switch (*in) { case '\\': ++in; assert(*in); switch(*in) { case 'n': *out='\n'; break; case 'r': *out='\r'; break; case 't': *out='\t'; break; case '\\': *out='\\'; break; case '"': *out='"'; break; case 'v': *out='\v'; break; case '\?': *out = '\?'; break; case 'f': *out = '\f'; break; case '\'': *out = '\''; break; case 'b': *out = '\b'; break; // FIXME add handling of hex and octal default: abort(); } break; default: *out=*in; } in++; out++; l++; } *out = 0; return l; }