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<td width="35%" class="headerValue"><a href="../../index.html">top level</a> - <a href="index.html">ccan/str</a> - str.h<span style="font-size: 80%;"> (source / <a href="str.h.func-sort-c.html">functions</a>)</span></td>
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<td class="headerItem">Test:</td>
<td class="headerValue">skiboot.info</td>
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<td class="headerItem">Lines:</td>
<td class="headerCovTableEntry">4</td>
<td class="headerCovTableEntry">4</td>
<td class="headerCovTableEntryHi">100.0 %</td>
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<td class="headerItem">Date:</td>
<td class="headerValue">2022-07-05 16:01:27</td>
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<td class="headerItem">Functions:</td>
<td class="headerCovTableEntry">1</td>
<td class="headerCovTableEntry">1</td>
<td class="headerCovTableEntryHi">100.0 %</td>
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<pre class="sourceHeading"> Branch data Line data Source code</pre>
<pre class="source">
<a name="1"><span class="lineNum"> 1 </span> : : /* CC0 (Public domain) - see LICENSE file for details */</a>
<a name="2"><span class="lineNum"> 2 </span> : : #ifndef CCAN_STR_H</a>
<a name="3"><span class="lineNum"> 3 </span> : : #define CCAN_STR_H</a>
<a name="4"><span class="lineNum"> 4 </span> : : #include "config.h"</a>
<a name="5"><span class="lineNum"> 5 </span> : : #include <string.h></a>
<a name="6"><span class="lineNum"> 6 </span> : : #include <stdbool.h></a>
<a name="7"><span class="lineNum"> 7 </span> : : #include <limits.h></a>
<a name="8"><span class="lineNum"> 8 </span> : : #include <ctype.h></a>
<a name="9"><span class="lineNum"> 9 </span> : : </a>
<a name="10"><span class="lineNum"> 10 </span> : : /**</a>
<a name="11"><span class="lineNum"> 11 </span> : : * streq - Are two strings equal?</a>
<a name="12"><span class="lineNum"> 12 </span> : : * @a: first string</a>
<a name="13"><span class="lineNum"> 13 </span> : : * @b: first string</a>
<a name="14"><span class="lineNum"> 14 </span> : : *</a>
<a name="15"><span class="lineNum"> 15 </span> : : * This macro is arguably more readable than "!strcmp(a, b)".</a>
<a name="16"><span class="lineNum"> 16 </span> : : *</a>
<a name="17"><span class="lineNum"> 17 </span> : : * Example:</a>
<a name="18"><span class="lineNum"> 18 </span> : : * if (streq(somestring, ""))</a>
<a name="19"><span class="lineNum"> 19 </span> : : * printf("String is empty!\n");</a>
<a name="20"><span class="lineNum"> 20 </span> : : */</a>
<a name="21"><span class="lineNum"> 21 </span> : : #define streq(a,b) (strcmp((a),(b)) == 0)</a>
<a name="22"><span class="lineNum"> 22 </span> : : </a>
<a name="23"><span class="lineNum"> 23 </span> : : /**</a>
<a name="24"><span class="lineNum"> 24 </span> : : * strstarts - Does this string start with this prefix?</a>
<a name="25"><span class="lineNum"> 25 </span> : : * @str: string to test</a>
<a name="26"><span class="lineNum"> 26 </span> : : * @prefix: prefix to look for at start of str</a>
<a name="27"><span class="lineNum"> 27 </span> : : *</a>
<a name="28"><span class="lineNum"> 28 </span> : : * Example:</a>
<a name="29"><span class="lineNum"> 29 </span> : : * if (strstarts(somestring, "foo"))</a>
<a name="30"><span class="lineNum"> 30 </span> : : * printf("String %s begins with 'foo'!\n", somestring);</a>
<a name="31"><span class="lineNum"> 31 </span> : : */</a>
<a name="32"><span class="lineNum"> 32 </span> : : #define strstarts(str,prefix) (strncmp((str),(prefix),strlen(prefix)) == 0)</a>
<a name="33"><span class="lineNum"> 33 </span> : : </a>
<a name="34"><span class="lineNum"> 34 </span> : : /**</a>
<a name="35"><span class="lineNum"> 35 </span> : : * strends - Does this string end with this postfix?</a>
<a name="36"><span class="lineNum"> 36 </span> : : * @str: string to test</a>
<a name="37"><span class="lineNum"> 37 </span> : : * @postfix: postfix to look for at end of str</a>
<a name="38"><span class="lineNum"> 38 </span> : : *</a>
<a name="39"><span class="lineNum"> 39 </span> : : * Example:</a>
<a name="40"><span class="lineNum"> 40 </span> : : * if (strends(somestring, "foo"))</a>
<a name="41"><span class="lineNum"> 41 </span> : : * printf("String %s end with 'foo'!\n", somestring);</a>
<a name="42"><span class="lineNum"> 42 </span> : : */</a>
<a name="43"><span class="lineNum"> 43 </span> :<span class="lineCov"> 14406 : static inline bool strends(const char *str, const char *postfix)</span></a>
<a name="44"><span class="lineNum"> 44 </span> : : {</a>
<a name="45"><span class="lineNum"> 45 </span> :<span class="lineCov"> 14406 : if (strlen(str) < strlen(postfix))</span></a>
<a name="46"><span class="lineNum"> 46 </span> :<span class="lineCov"> 5520 : return false;</span></a>
<a name="47"><span class="lineNum"> 47 </span> : : </a>
<a name="48"><span class="lineNum"> 48 </span> :<span class="lineCov"> 8886 : return streq(str + strlen(str) - strlen(postfix), postfix);</span></a>
<a name="49"><span class="lineNum"> 49 </span> : : }</a>
<a name="50"><span class="lineNum"> 50 </span> : : </a>
<a name="51"><span class="lineNum"> 51 </span> : : /**</a>
<a name="52"><span class="lineNum"> 52 </span> : : * stringify - Turn expression into a string literal</a>
<a name="53"><span class="lineNum"> 53 </span> : : * @expr: any C expression</a>
<a name="54"><span class="lineNum"> 54 </span> : : *</a>
<a name="55"><span class="lineNum"> 55 </span> : : * Example:</a>
<a name="56"><span class="lineNum"> 56 </span> : : * #define PRINT_COND_IF_FALSE(cond) \</a>
<a name="57"><span class="lineNum"> 57 </span> : : * ((cond) || printf("%s is false!", stringify(cond)))</a>
<a name="58"><span class="lineNum"> 58 </span> : : */</a>
<a name="59"><span class="lineNum"> 59 </span> : : #define stringify(expr) stringify_1(expr)</a>
<a name="60"><span class="lineNum"> 60 </span> : : /* Double-indirection required to stringify expansions */</a>
<a name="61"><span class="lineNum"> 61 </span> : : #define stringify_1(expr) #expr</a>
<a name="62"><span class="lineNum"> 62 </span> : : </a>
<a name="63"><span class="lineNum"> 63 </span> : : /**</a>
<a name="64"><span class="lineNum"> 64 </span> : : * strcount - Count number of (non-overlapping) occurrences of a substring.</a>
<a name="65"><span class="lineNum"> 65 </span> : : * @haystack: a C string</a>
<a name="66"><span class="lineNum"> 66 </span> : : * @needle: a substring</a>
<a name="67"><span class="lineNum"> 67 </span> : : *</a>
<a name="68"><span class="lineNum"> 68 </span> : : * Example:</a>
<a name="69"><span class="lineNum"> 69 </span> : : * assert(strcount("aaa aaa", "a") == 6);</a>
<a name="70"><span class="lineNum"> 70 </span> : : * assert(strcount("aaa aaa", "ab") == 0);</a>
<a name="71"><span class="lineNum"> 71 </span> : : * assert(strcount("aaa aaa", "aa") == 2);</a>
<a name="72"><span class="lineNum"> 72 </span> : : */</a>
<a name="73"><span class="lineNum"> 73 </span> : : size_t strcount(const char *haystack, const char *needle);</a>
<a name="74"><span class="lineNum"> 74 </span> : : </a>
<a name="75"><span class="lineNum"> 75 </span> : : /**</a>
<a name="76"><span class="lineNum"> 76 </span> : : * STR_MAX_CHARS - Maximum possible size of numeric string for this type.</a>
<a name="77"><span class="lineNum"> 77 </span> : : * @type_or_expr: a pointer or integer type or expression.</a>
<a name="78"><span class="lineNum"> 78 </span> : : *</a>
<a name="79"><span class="lineNum"> 79 </span> : : * This provides enough space for a nul-terminated string which represents the</a>
<a name="80"><span class="lineNum"> 80 </span> : : * largest possible value for the type or expression.</a>
<a name="81"><span class="lineNum"> 81 </span> : : *</a>
<a name="82"><span class="lineNum"> 82 </span> : : * Note: The implementation adds extra space so hex values or negative</a>
<a name="83"><span class="lineNum"> 83 </span> : : * values will fit (eg. sprintf(... "%p"). )</a>
<a name="84"><span class="lineNum"> 84 </span> : : *</a>
<a name="85"><span class="lineNum"> 85 </span> : : * Example:</a>
<a name="86"><span class="lineNum"> 86 </span> : : * char str[STR_MAX_CHARS(int)];</a>
<a name="87"><span class="lineNum"> 87 </span> : : *</a>
<a name="88"><span class="lineNum"> 88 </span> : : * sprintf(str, "%i", 7);</a>
<a name="89"><span class="lineNum"> 89 </span> : : */</a>
<a name="90"><span class="lineNum"> 90 </span> : : #define STR_MAX_CHARS(type_or_expr) \</a>
<a name="91"><span class="lineNum"> 91 </span> : : ((sizeof(type_or_expr) * CHAR_BIT + 8) / 9 * 3 + 2 \</a>
<a name="92"><span class="lineNum"> 92 </span> : : + STR_MAX_CHARS_TCHECK_(type_or_expr))</a>
<a name="93"><span class="lineNum"> 93 </span> : : </a>
<a name="94"><span class="lineNum"> 94 </span> : : #if HAVE_TYPEOF</a>
<a name="95"><span class="lineNum"> 95 </span> : : /* Only a simple type can have 0 assigned, so test that. */</a>
<a name="96"><span class="lineNum"> 96 </span> : : #define STR_MAX_CHARS_TCHECK_(type_or_expr) \</a>
<a name="97"><span class="lineNum"> 97 </span> : : (sizeof(({ typeof(type_or_expr) x = 0; x; }))*0)</a>
<a name="98"><span class="lineNum"> 98 </span> : : #else</a>
<a name="99"><span class="lineNum"> 99 </span> : : #define STR_MAX_CHARS_TCHECK_(type_or_expr) 0</a>
<a name="100"><span class="lineNum"> 100 </span> : : #endif</a>
<a name="101"><span class="lineNum"> 101 </span> : : </a>
<a name="102"><span class="lineNum"> 102 </span> : : #include <ccan/str/str_debug.h></a>
<a name="103"><span class="lineNum"> 103 </span> : : </a>
<a name="104"><span class="lineNum"> 104 </span> : : /* These checks force things out of line, hence they are under DEBUG. */</a>
<a name="105"><span class="lineNum"> 105 </span> : : #ifdef CCAN_STR_DEBUG</a>
<a name="106"><span class="lineNum"> 106 </span> : : #include <ccan/build_assert/build_assert.h></a>
<a name="107"><span class="lineNum"> 107 </span> : : </a>
<a name="108"><span class="lineNum"> 108 </span> : : /* You can use a char if char is unsigned. */</a>
<a name="109"><span class="lineNum"> 109 </span> : : #if HAVE_BUILTIN_TYPES_COMPATIBLE_P && HAVE_TYPEOF</a>
<a name="110"><span class="lineNum"> 110 </span> : : #define str_check_arg_(i) \</a>
<a name="111"><span class="lineNum"> 111 </span> : : ((i) + BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(typeof(i), \</a>
<a name="112"><span class="lineNum"> 112 </span> : : char) \</a>
<a name="113"><span class="lineNum"> 113 </span> : : || (char)255 > 0))</a>
<a name="114"><span class="lineNum"> 114 </span> : : #else</a>
<a name="115"><span class="lineNum"> 115 </span> : : #define str_check_arg_(i) (i)</a>
<a name="116"><span class="lineNum"> 116 </span> : : #endif</a>
<a name="117"><span class="lineNum"> 117 </span> : : </a>
<a name="118"><span class="lineNum"> 118 </span> : : #if HAVE_TYPEOF</a>
<a name="119"><span class="lineNum"> 119 </span> : : /* With GNU magic, we can make const-respecting standard string functions. */</a>
<a name="120"><span class="lineNum"> 120 </span> : : #undef strstr</a>
<a name="121"><span class="lineNum"> 121 </span> : : #undef strchr</a>
<a name="122"><span class="lineNum"> 122 </span> : : #undef strrchr</a>
<a name="123"><span class="lineNum"> 123 </span> : : </a>
<a name="124"><span class="lineNum"> 124 </span> : : /* + 0 is needed to decay array into pointer. */</a>
<a name="125"><span class="lineNum"> 125 </span> : : #define strstr(haystack, needle) \</a>
<a name="126"><span class="lineNum"> 126 </span> : : ((typeof((haystack) + 0))str_strstr((haystack), (needle)))</a>
<a name="127"><span class="lineNum"> 127 </span> : : #define strchr(haystack, c) \</a>
<a name="128"><span class="lineNum"> 128 </span> : : ((typeof((haystack) + 0))str_strchr((haystack), (c)))</a>
<a name="129"><span class="lineNum"> 129 </span> : : #define strrchr(haystack, c) \</a>
<a name="130"><span class="lineNum"> 130 </span> : : ((typeof((haystack) + 0))str_strrchr((haystack), (c)))</a>
<a name="131"><span class="lineNum"> 131 </span> : : #endif</a>
<a name="132"><span class="lineNum"> 132 </span> : : #endif /* CCAN_STR_DEBUG */</a>
<a name="133"><span class="lineNum"> 133 </span> : : </a>
<a name="134"><span class="lineNum"> 134 </span> : : #endif /* CCAN_STR_H */</a>
</pre>
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