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284 lines
12 KiB
C
284 lines
12 KiB
C
/*
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** scanf-test.c
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**
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** Tests that the scanf family of functions scans and converts its input data
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** correctly.
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**
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** Note: When this program uses conio, it doesn't guard against printing off
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** the bottom of the screen. So, you might have a problem on platforms with
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** "short" screens.
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**
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** 2005-01-26, Greg King
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*/
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/* Define USE_STDIO, when you want to use the stdio functions.
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** Do not define it, when you want to use the conio functions.
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*/
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/*
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#define USE_STDIO
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*/
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#include <stdio.h>
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#include <string.h>
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#ifdef USE_STDIO
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# define SCANF scanf
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# define PRINTF printf
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#else
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# include <conio.h>
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/* Unlike other conio input functions, cscanf() echoes what you type. */
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# define SCANF cscanf
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# define PRINTF cprintf
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#endif
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#define ARRAYSIZE(a) (sizeof (a) / sizeof (a)[0])
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static const struct {
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const char *input, *format;
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int rvalue;
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enum TYPE {
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INT,
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CHAR
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} type1;
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union {
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int nvalue;
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const char *svalue;
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} v1;
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enum TYPE type2;
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union {
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int nvalue;
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const char *svalue;
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} v2;
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} test_data[] = {
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/* Input sequences for character specifiers must be less than 80 characters
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** long. These format strings are allowwed a maximum of two assignment
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** specifications.
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*/
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/* Test that literals match, and that they aren't seen as conversions.
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** Test that integer specifiers can handle end-of-file.
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*/
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{"qwerty Dvorak", "qwerty Dvorak", 0 , INT, {0}, INT, {0}},
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{"qwerty" , "qwerty %d%i" , EOF, INT, {0}, INT, {0}},
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{"qwerty " , "qwerty %d%i" , EOF, INT, {0}, INT, {0}},
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/* Test that integer specifiers scan properly. */
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{"qwerty a" , "qwerty %d%i", 0, INT, {0} , INT, {0}},
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{"qwerty -" , "qwerty %d%i", 0, INT, {0} , INT, {0}},
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{"qwerty -9" , "qwerty %d%i", 1, INT, {-9} , INT, {0}},
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{"qwerty -95" , "qwerty %d%i", 1, INT, {-95} , INT, {0}},
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{"qwerty -95a" , "qwerty %d%i", 1, INT, {-95} , INT, {0}},
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{"qwerty -95a 1", "qwerty %d%i", 1, INT, {-95} , INT, {0}},
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{"qwerty -a" , "qwerty %d%i", 0, INT, {0} , INT, {0}},
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{"qwerty -95 1" , "qwerty %d%i", 2, INT, {-95} , INT, {1}},
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{"qwerty 95 2", "qwerty %i" , 1, INT, {95} , INT, {0}},
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{"qwerty -95 +2", "qwerty %x%o", 2, INT, {-0x95}, INT, {02}},
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{"qwerty 0X9E 02", "qwerty %i%i", 2, INT, {0x9e} , INT, {2}},
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{"qwerty 095 2", "qwerty %i%i", 2, INT, {0} , INT, {95}},
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{"qwerty 0e5 2", "qwerty %i%i", 1, INT, {0} , INT, {0}},
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/* [String pointers are cast as (int),
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** in order to avoid cc65 warnings.]
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*/
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/* Test that character specifiers can handle end-of-file. */
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{"qwerty" , "qwerty %s%s" , EOF, CHAR, {(int)""}, CHAR, {(int)""}},
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{"qwerty ", "qwerty %s%s" , EOF, CHAR, {(int)""}, CHAR, {(int)""}},
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{"qwerty" , "qwerty %c%c" , EOF, CHAR, {(int)""}, CHAR, {(int)""}},
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{"qwerty ", "qwerty %c%c" , EOF, CHAR, {(int)""}, CHAR, {(int)""}},
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{"qwerty" , "qwerty %[ a-z]%c", EOF, CHAR, {(int)""}, CHAR, {(int)""}},
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{"qwerty ", "qwerty %[ a-z]%c", EOF, CHAR, {(int)""}, CHAR, {(int)""}},
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{"qwerty ", "qwerty%s%s" , EOF, CHAR, {(int)""}, CHAR, {(int)""}},
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/* Test that character specifiers scan properly. */
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{"123456qwertyasdfghzxcvbn!@#$%^QWERTYASDFGHZXCV"
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"BN7890-=uiop[]\\jkl;'m,./&*()_+UIOP{}|JKL:\"M<>?",
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"%79s%79s", 2,
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CHAR, {(int)"123456qwertyasdfghzxcvbn!@#$%^QWERTYASDFGHZXCV"
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"BN7890-=uiop[]\\jkl;'m,./&*()_+UIO"}, CHAR, {(int)"P{}|JKL:\"M<>?"}},
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{"qwerty ", "qwerty%c%c" , 2, CHAR, {(int)" "} , CHAR, {(int)" "}},
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{"qwerty ", "qwerty%2c%c" , 2, CHAR, {(int)" "} , CHAR, {(int)" "}},
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{"qwerty ", "qwerty%2c%2c" , 1, CHAR, {(int)" "} , CHAR, {(int)" "}},
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{"qwerty ", "qwerty%[ a-z]%c", 1, CHAR, {(int)" "}, CHAR, {(int)""}},
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{"qwerty q", "qwerty%[ a-z]%c", 1, CHAR, {(int)" q"}, CHAR, {(int)""}},
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{"qwerty Q", "qwerty%[ a-z]%c", 2, CHAR, {(int)" "}, CHAR, {(int)"Q"}},
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{"qwerty-QWERTY-", "%[q-ze-]%[-A-Z]" , 2, CHAR, {(int)"qwerty-"},
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CHAR, {(int)"QWERTY-"}},
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/* Test the space-separation of strings. */
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{"qwerty qwerty" , "qwerty%s%s", 1, CHAR, {(int)"qwerty"},
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CHAR, {(int)""}},
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{"qwerty qwerty Dvorak", "qwerty%s%s", 2, CHAR, {(int)"qwerty"},
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CHAR, {(int)"Dvorak"}},
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/* Test the mixxing of types. */
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{"qwerty abc3", "qwerty%s%X" , 1, CHAR, {(int)"abc3"} , INT , {0}},
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{"qwerty abc3", "qwerty%[ a-z]%X" , 2, CHAR, {(int)" abc"} , INT , {3}},
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{"qwerty abc3", "qwerty%[ a-z3]%X", 1, CHAR, {(int)" abc3"}, INT , {0}},
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{"qwerty abc3", "qwerty%[ A-Z]%X" , 2, CHAR, {(int)" "} , INT ,
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{0xabc3}},
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{"qwerty 3abc", "qwerty%i%[ a-z]" , 2, INT , {3} , CHAR,
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{(int)"abc"}},
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{"qwerty 3abc", "qwerty%i%[ A-Z]" , 1, INT , {3} , CHAR,
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{(int)""}},
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/* Test the character-count specifier. */
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{" 95 5", "%n%i" , 1, INT , {0} , INT, {95}},
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{" a5 5", "%n%i" , 0, INT , {0} , INT, {0}},
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{" a5 5", "%x%n" , 1, INT , {0xa5} , INT, {4}},
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{" a5 5", " %4c%n", 1, CHAR, {(int)"a5 5"}, INT, {6}},
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{" 05a9" , "%i%n" , 1, INT , {5} , INT, {3}},
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/* Test assignment-suppression. */
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{" 95 6", "%n%*i" , 0, INT , {0} , INT, {0}},
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{" a5 6", "%*x%n" , 0, INT , {4} , INT, {0}},
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{" a5 6", "%*x%n%o", 1, INT , {4} , INT, {6}},
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{" a5 6", " %*4c%d", 0, CHAR, {(int)""}, INT, {0}},
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{"The first number is 7. The second number is 8.\n",
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"%*[ .A-Za-z]%d%*[ .A-Za-z]%d", 2, INT, {7}, INT, {8}},
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};
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/* Test the char, short, and long specification-modifiers. */
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static const struct {
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const char *input, *format;
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long value;
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} type_data[] = {
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{"+123456789", "%hhd", (signed char)123456789L},
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{" 123456789", "%hd" , (unsigned short)123456789L},
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{" 123456789", "%ld" , 123456789L},
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{"-123456789", "%lld", -123456789L},
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};
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static void Pause(void) {
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#ifdef USE_STDIO
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printf("\n");
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#else
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cprintf("\r\nTap a key to see the next test. ");
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cgetc();
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clrscr();
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#endif
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}
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int main(void) {
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long n0;
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unsigned t;
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int c, n1 = 12345, n2, n3;
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char s1[80], s2[80];
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void *p1 = main, *p2 = main, *p3 = main, *p4 = main;
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#ifndef USE_STDIO
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clrscr();
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cursor(1);
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#endif
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/* Test that scanf() can recognize percent-signs in the input.
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** Test that integer converters skip white-space.
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** Test that "%i" can scan a single zero digit (followed by EOF).
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*/
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sscanf("% \r\n\f\v\t 0", "%%%i", &n1);
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if (n1 != 0)
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PRINTF("sscanf()'s \"%%%%%%i\" couldn't scan either a \"%%\" "
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"or a single zero digit.\r\n\n");
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/* Test scanf()'s return-value: EOF if input ends before the first
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** conversion-attempt begins; an assignment-count, otherwise.
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** Test that scanf() properly converts and assigns the correct number
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** of arguments.
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*/
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PRINTF("Testing scanf()'s return-value,\r\nconversions, and assignments...\r\n");
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for (t = 0; t < ARRAYSIZE(test_data); ++t) {
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/* Prefill the arguments with zeroes. */
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n1 = n2 = 0;
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memset(s1, '\0', sizeof s1);
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memset(s2, '\0', sizeof s2);
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c=sscanf(test_data[t].input, test_data[t].format,
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/* Avoid warning messages about different
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** pointer-types, by casting them to void-pointers.
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*/
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test_data[t].type1 == INT ? (void *)&n1 : (void *)s1,
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test_data[t].type2 == INT ? (void *)&n2 : (void *)s2);
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if (c != test_data[t].rvalue)
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PRINTF("Test #%u returned %d instead of %d.\r\n",
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t + 1, c, test_data[t].rvalue);
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if (test_data[t].type1 == INT) {
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if (test_data[t].v1.nvalue != n1)
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PRINTF("Test #%u assigned %i, instead of %i,\r\n"
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"\tto the first argument.\r\n\n",
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t + 1, n1, test_data[t].v1.nvalue);
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}
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else { /* test_data[t].type1 == CHAR */
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if (strcmp(test_data[t].v1.svalue, s1))
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PRINTF("Test #%u assigned\r\n\"%s\",\r\n"
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"\tinstead of\r\n\"%s\",\r\n"
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"\tto the first argument.\r\n\n",
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t + 1, s1, test_data[t].v1.svalue);
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}
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if (test_data[t].type2 == INT) {
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if (test_data[t].v2.nvalue != n2)
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PRINTF("Test #%u assigned %i, instead of %i,\r\n"
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"\tto the second argument.\r\n\n",
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t + 1, n2, test_data[t].v2.nvalue);
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}
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else { /* test_data[t].type2 == CHAR */
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if (strcmp(test_data[t].v2.svalue, s2))
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PRINTF("Test #%u assigned\r\n\"%s\",\r\n"
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"\tinstead of\r\n\"%s\",\r\n"
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"\tto the second argument.\r\n\n",
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t + 1, s2, test_data[t].v2.svalue);
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}
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}
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Pause();
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/* Test the char, short, and long specification-modifiers. */
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PRINTF("Testing scanf()'s type-modifiers...\r\n");
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for (t = 0; t < ARRAYSIZE(type_data); ++t) {
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n0 = 0L;
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sscanf(type_data[t].input, type_data[t].format, &n0);
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if (type_data[t].value != n0)
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PRINTF("Test #%u assigned %li instead of %li.\r\n",
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t + 1, n0, type_data[t].value);
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}
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Pause();
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/* Test that the pointer specification
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** can convert what printf() generates.
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*/
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PRINTF("Testing \"%%p\"...\r\n");
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sprintf(s1, "%p %p %p %p", NULL, NULL,
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Pause, /* static (program) storage */
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&c); /* automatic (stack) storage */
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sscanf(s1, "%p%p%p %p", &p1, &p2, &p3, &p4);
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if (p1 != NULL || p2 != NULL ||
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p3 != (void *)Pause || p4 != (void *)&c)
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PRINTF("p1 is %p, p2 is %p; they should be %p.\r\n"
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"scanf() assigned %p to p3, instead of %p.\r\n"
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"scanf() assigned %p to p4, instead of %p.\r\n",
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p1, p2, NULL,
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p3, Pause,
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p4, &c);
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/* Test that scanf() can scan typed input.
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** Retest that "%i" can decode radix prefixxes.
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*/
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do {
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Pause();
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PRINTF("Type 3 signed numbers,\r\n"
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"separated by white-space:\r\n"
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"octal decimal hexadecimal\r\n"
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"? ");
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c = SCANF("%i %i %i", &n1, &n2, &n3);
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PRINTF("\r\n\nscanf() returned %i.\r\n"
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"The numbers are:\r\n"
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" %+o octal,\r\n"
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" %+d decimal,\r\n"
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" %+#X hexadecimal.\r\n",
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c, n1, n2, n3);
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} while (c > 0);
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return 0;
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}
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