mirror of
https://github.com/jrbrtsn/ban2fail
synced 2024-06-16 11:58:01 +00:00
208 lines
6.4 KiB
C++
208 lines
6.4 KiB
C++
/***************************************************************************
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* Copyright (C) 2019 by John D. Robertson *
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* john@rrci.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifndef STR_H
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#define STR_H
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#include <stdarg.h>
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#include <sys/types.h>
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/* STR is a dynamically sized null terminated string buffer which is always
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* appended until STR_reset() is called. It is particularly useful for
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* things like creating complex SQL queries.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct _cb {
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size_t sz,
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len;
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char *buf;
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} STR;
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#define STR_str(self) \
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((const char*)(self)->buf)
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/**********************************************************************************
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* Return the pointer to the buffer.
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*/
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#define STR_len(self) \
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((const size_t)(self)->len)
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/**********************************************************************************
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* Return the current length of the string in the buffer
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*/
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#define STR_reset(self) \
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((self)->buf[((self)->len= 0)]= '\0')
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/**********************************************************************************
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* Reset the buffer so that the length is zero.
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*/
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int
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STR_sinit(STR *self, size_t sz_hint);
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/**********************************************************************************
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* Initialization to be called for static instances of STR each use, but
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* actual initialization only occurs once.
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*/
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#define STR_create(p)\
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((p)= (STR_constructor((p)=malloc(sizeof(STR))) ? (p) : ( p ? realloc(STR_destructor(p),0): 0)))
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STR*
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STR_constructor(STR *self, size_t sz_hint);
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/**********************************************************************************
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* Prepare a STR for use with initial size of sz_hint.
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*/
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#define STR_destroy(self)\
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if(STR_destructor(self)){free(self);(self)=NULL;}
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void*
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STR_destructor(STR *self);
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/**********************************************************************************
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* Free resources associated with STR.
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*/
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int
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STR_sprintf(STR *self, const char *fmt, ...);
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/**********************************************************************************
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* Same as sprintf, except you don't have to worry about buffer overflows.
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* Returns -1 for error.
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*/
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int
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STR_vsprintf(STR *self, const char *fmt, va_list ap);
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/**********************************************************************************
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* Same as vsprintf, except you don't have to worry about buffer overflows.
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* Returns -1 for error.
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*/
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int
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STR_append(STR *self, const char *str, size_t str_len);
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/**********************************************************************************
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* Append string str to the end of the current buffer.
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* Returns -1 for error.
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*/
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int
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STR_putc(STR *self, int c);
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/**********************************************************************************
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* Append a single character to the end of the current buffer.
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* Returns -1 for error.
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*/
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const char*
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STR_tolower(STR *self);
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/**********************************************************************************
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* Convert all characters in buffer to lower case.
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*/
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const char*
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STR_XMLencode(STR *self, const char *src);
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/**************************************************************
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* encode the src string for XML into self. Return self's buffer.
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* NOTE: self does not get reset!
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*/
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const char*
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STR_URLencode(STR *self, const char *src);
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/**************************************************************
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* encode the src string for URL into self. Return self's buffer.
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* NOTE: self does not get reset!
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*/
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const char*
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STR_utf8toHTML(STR *self, const char *src);
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/**************************************************************
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* place the HTML representation of the utf-8 src string into self.
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* Return self's buffer.
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* NOTE: self does not get reset!
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*/
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const char*
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STR_escapeJSONstr(STR *self, const char *src);
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/**************************************************************
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* Escape any characters such the src can be used in a JSON
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* string.
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* Return self's buffer.
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* NOTE: self does not get reset!
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*/
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#ifdef __cplusplus
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}
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// C++ wrapper
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class StrBuf {
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public:
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StrBuf(size_t sz_hint)
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{STR_constructor(&obj, sz_hint);}
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~StrBuf()
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{STR_destructor(&obj);}
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inline const char *str() const
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{return STR_str(&obj);}
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inline size_t len() const
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{return STR_len(&obj);}
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inline void reset()
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{STR_reset(&obj);}
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inline int sprintf(const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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int rtn= STR_vsprintf(&obj, fmt, ap);
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va_end (ap);
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return rtn;
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}
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inline int vsprintf(const char *fmt, va_list ap)
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{
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return STR_vsprintf(&obj, fmt, ap);
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}
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inline int append(const char *str, size_t str_len)
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{return STR_append(&obj, str, str_len);}
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inline int putc(int c)
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{return STR_putc(&obj, c);}
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inline const char* tolower()
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{return STR_tolower(&obj);}
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inline const char* XMLencode(const char *src)
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{return STR_XMLencode(&obj, src);}
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inline const char* URLencode(const char *src)
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{return STR_URLencode(&obj, src);}
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inline const char* utf8toHTML(const char *src)
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{return STR_utf8toHTML(&obj, src);}
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private:
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STR obj;
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};
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#endif
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#endif
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