granicus.if.org Git - strace/blob - tests/print_quoted_string.c

   1 #include "tests.h"
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6
   7 /*
   8  * Based on string_quote() from util.c.
   9  * Assumes instr is NUL-terminated.
  10  */
  11
  12 void
  13 print_quoted_string(const char *instr)
  14 {
  15         print_quoted_memory(instr, strlen(instr));
  16 }
  17
  18 void
  19 print_quoted_memory(const void *const instr, const size_t len)
  20 {
  21         const unsigned char *str = (const unsigned char *) instr;
  22         size_t i;
  23
  24         putchar('"');
  25         for (i = 0; i < len; ++i) {
  26                 const int c = str[i];
  27                 switch (c) {
  28                         case '\"':
  29                                 printf("\\\"");
  30                                 break;
  31                         case '\\':
  32                                 printf("\\\\");
  33                                 break;
  34                         case '\f':
  35                                 printf("\\f");
  36                                 break;
  37                         case '\n':
  38                                 printf("\\n");
  39                                 break;
  40                         case '\r':
  41                                 printf("\\r");
  42                                 break;
  43                         case '\t':
  44                                 printf("\\t");
  45                                 break;
  46                         case '\v':
  47                                 printf("\\v");
  48                                 break;
  49                         default:
  50                                 if (c >= ' ' && c <= 0x7e)
  51                                         putchar(c);
  52                                 else {
  53                                         putchar('\\');
  54
  55                                         char c1 = '0' + (c & 0x7);
  56                                         char c2 = '0' + ((c >> 3) & 0x7);
  57                                         char c3 = '0' + (c >> 6);
  58
  59                                         if (*str >= '0' && *str <= '9') {
  60                                                 /* Print \octal */
  61                                                 putchar(c3);
  62                                                 putchar(c2);
  63                                         } else {
  64                                                 /* Print \[[o]o]o */
  65                                                 if (c3 != '0')
  66                                                         putchar(c3);
  67                                                 if (c3 != '0' || c2 != '0')
  68                                                         putchar(c2);
  69                                         }
  70                                         putchar(c1);
  71                                 }
  72                                 break;
  73                 }
  74         }
  75
  76         putchar('"');
  77 }
  78
  79 void
  80 print_quoted_hex(const void *const instr, const size_t len)
  81 {
  82         const unsigned char *str = instr;
  83         size_t i;
  84
  85         printf("\"");
  86         for (i = 0; i < len; i++)
  87                 printf("\\x%02x", str[i]);
  88         printf("\"");
  89 }