Annotation of libwww/Library/src/HTString.html, revision 2.23
2.11 frystyk 1: <HTML>
2: <HEAD>
2.19 frystyk 3: <TITLE>String Handling</TITLE>
2.23 ! frystyk 4: <!-- Changed by: Henrik Frystyk Nielsen, 2-Oct-1995 -->
2.11 frystyk 5: </HEAD>
2.6 timbl 6: <BODY>
2.9 frystyk 7:
8: <H1>String Management</H1>
2.11 frystyk 9:
10: <PRE>
11: /*
2.15 frystyk 12: ** (c) COPYRIGHT MIT 1995.
2.11 frystyk 13: ** Please first read the full copyright statement in the file COPYRIGH.
14: */
15: </PRE>
2.9 frystyk 16:
17: These functions provide functionality for case-independent string
18: comparison and allocations with copies etc. <P>
19:
20: This module is implemented by <A HREF="HTString.c">HTString.c</A>, and
21: it is a part of the <A NAME="z10"
2.21 frystyk 22: HREF="http://www.w3.org/pub/WWW/Library/">
2.18 frystyk 23: W3C Reference Library</A>. <P>
2.9 frystyk 24:
2.8 frystyk 25: <PRE>
26: #ifndef HTSTRING_H
2.1 timbl 27: #define HTSTRING_H
28:
29: extern CONST char * HTLibraryVersion; /* String for help screen etc */
2.9 frystyk 30: </PRE>
31:
2.17 frystyk 32: <H2><A NAME="dyn">Dynamic String Manipulation</A></H2>
2.9 frystyk 33:
34: These two functions are dynamic versions of <CODE>strcpy</CODE> and
35: <CODE>strcat</CODE>. They use <CODE>malloc</CODE> for allocating space
36: for the string. If <CODE>StrAllocCopy</CODE> is called with a non-NULL
37: dest, then this is freed before the new value is assigned so that only
38: the <EM>last</EM> string created has to be freed by the user. If
39: <CODE>StrAllocCat</CODE> is called with a NULL pointer as destination
40: then it is equivalent to <CODE>StrAllocCopy</CODE>.
2.1 timbl 41:
2.9 frystyk 42: <PRE>
43: #define StrAllocCopy(dest, src) HTSACopy (&(dest), src)
44: #define StrAllocCat(dest, src) HTSACat (&(dest), src)
45: extern char * HTSACopy PARAMS ((char **dest, CONST char *src));
46: extern char * HTSACat PARAMS ((char **dest, CONST char *src));
2.6 timbl 47: </PRE>
2.1 timbl 48:
2.17 frystyk 49: <H2><A NAME="utils">Case-insensitive String Comparison</A></H2>
2.9 frystyk 50:
51: The usual routines (comp instead of cmp) had some problem.
2.7 luotonen 52:
53: <PRE>
2.23 ! frystyk 54: extern int strcasecomp (CONST char *a, CONST char *b);
! 55: extern int strncasecomp (CONST char *a, CONST char *b, int n);
2.7 luotonen 56: </PRE>
57:
2.9 frystyk 58: <H2>Case-insensitive strstr</H2>
2.7 luotonen 59:
2.9 frystyk 60: This works like <CODE>strstr()</CODE> but is not case-sensitive.
2.1 timbl 61:
2.9 frystyk 62: <PRE>
2.10 frystyk 63: extern char * strcasestr PARAMS((char * s1, char * s2));
2.17 frystyk 64: </PRE>
65:
66: <H2>Strip white space off a string</H2>
67:
68: Return value points to first non-white character, or to '/0' if
69: none. All trailing white space is OVERWRITTEN with zero.
70:
71: <PRE>
72: extern char * HTStrip PARAMS((char * s));
2.6 timbl 73: </PRE>
2.9 frystyk 74:
2.6 timbl 75: <H2>Next word or quoted string</H2>
2.14 frystyk 76:
77: This function returns a RFC822 word separated by space, comma, or
78: semi-colons.
79:
2.9 frystyk 80: <PRE>
81: extern char * HTNextField PARAMS ((char** pstr));
2.14 frystyk 82: </PRE>
83:
84: <H2>RFC1123 Date/Time Stamp String</H2>
85:
86: Returns a pointer to a static area!
87:
88: <PRE>
2.23 ! frystyk 89: extern CONST char *HTDateTimeStr (time_t *calendar, BOOL local);
2.14 frystyk 90: </PRE>
91:
2.23 ! frystyk 92: <H2>Date used for directory listings</H2>
! 93:
! 94: <PRE>
! 95: extern BOOL HTDateDirStr (time_t * time, char * str, int len);
! 96: </PRE>
2.14 frystyk 97:
98: <H2>Timezone Offset</H2>
99:
100: Calculates the offset from GMT in seconds. This is called from <A
2.22 frystyk 101: HREF="HTReq.html#Library">HTLibInit()</A>.
2.14 frystyk 102:
103: <PRE>
104: extern long HTGetTimeZoneOffset NOPARAMS;
105: </PRE>
106:
107: <H2>Parse a Date/Time String</H2>
108:
109: Converts a string representation in GMT to a local representation of
110: localtime <CODE>time_t</CODE>.
111:
112: <PRE>
113: extern time_t HTParseTime PARAMS((CONST char * str));
114: </PRE>
115:
116:
117: <H2>Unique Message-ID String</H2>
118:
119: <PRE>
120: extern CONST char *HTMessageIdStr NOPARAMS;
2.9 frystyk 121: #endif
2.20 frystyk 122: </PRE>
123:
124: <H2>Converts an Integer to a String using Prefix</H2>
125:
126: In computer-world 1K is 1024 bytes and 1M is 1024K -- however,
127: sprintf() still formats in base-10. Therefore I output only until
128: 999, and then start using the next unit. This doesn't work wrong,
129: it's just a feature. The conversion is done in "str" which must be
130: large enough to contain the result.
131:
132: <PRE>
2.23 ! frystyk 133: extern void HTNumToStr (unsigned long n, char *str, int len);
! 134: </PRE>
! 135:
! 136: <H2>Conversion between URLs and Local File Names</H2>
! 137:
! 138: These are two functions that separate the URL naming syntax from
! 139: platform dependent file naming schemes. If you are porting the code to
! 140: a new platform, you probably have to do some translation here.
! 141:
! 142: <H3>Convert file URLs into a local representation</H3>
! 143:
! 144: The URL has already been translated through the rules in get_physical
! 145: in HTAccess.c and all we need to do now is to map the path to a local
! 146: representation, for example if must translate '/' to the ones that
! 147: turn the wrong way ;-) Returns local file (that must be freed by
! 148: caller) if OK, else NULL.
! 149:
! 150: <PRE>
! 151: extern char * HTWWWToLocal (CONST char * url, CONST char * base);
! 152: </PRE>
! 153:
! 154: <H3>Convert a local file name into a URL</H3>
! 155:
! 156: Generates a WWW URL name from a local file name or NULL if error.
! 157: Returns URL (that must be freed by caller) if OK, else NULL.
! 158:
! 159: <PRE>
! 160: extern char * HTLocalToWWW (CONST char * local);
2.9 frystyk 161: </PRE>
2.14 frystyk 162:
163: End of declaration module
2.1 timbl 164:
2.6 timbl 165: </BODY>
2.9 frystyk 166: </HTML>
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