* added qse_strxput() and qse_strxnput()
* added qse_strxsubst ()
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@ -1,5 +1,5 @@
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/*
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* $Id: str.h 323 2010-04-05 12:50:01Z hyunghwan.chung $
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* $Id: str.h 324 2010-04-29 13:14:13Z hyunghwan.chung $
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*
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Copyright 2006-2009 Chung, Hyung-Hwan.
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This file is part of QSE.
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@ -25,8 +25,7 @@
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#include <qse/macros.h>
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/** @file
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* <qse/cmn/str.h> defines various functions, types, macros to manipulate
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* a string.
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* Various functions, types, macros for string manipulation.
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*
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* The qse_cstr_t type and the qse_xstr_t defined in <qse/types.h> helps you
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* dealing with a string pointer and length.
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@ -39,7 +38,11 @@
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#define QSE_STR_SIZER(s) ((s)->sizer) /**< buffer resizer function */
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typedef struct qse_str_t qse_str_t;
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typedef qse_size_t (*qse_str_sizer_t) (qse_str_t* data, qse_size_t hint);
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typedef qse_size_t (*qse_str_sizer_t) (
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qse_str_t* data,
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qse_size_t hint
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);
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/**
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* The qse_str_t type defines a dynamically resizable string.
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@ -53,6 +56,18 @@ struct qse_str_t
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qse_size_t capa; /**< buffer capacity */
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};
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/**
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* The qse_strxsubst_subst_t type defines a callback function
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* for qse_strxsubst() to substitue a new value for an identifier @a ident.
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*/
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typedef qse_char_t* (*qse_strxsubst_subst_t) (
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qse_char_t* buf,
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qse_size_t bsz,
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const qse_cstr_t* ident,
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void* ctx
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);
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/* int qse_chartonum (qse_char_t c, int base) */
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#define QSE_CHARTONUM(c,base) \
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((c>=QSE_T('0') && c<=QSE_T('9'))? ((c-QSE_T('0')<base)? (c-QSE_T('0')): base): \
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@ -168,14 +183,35 @@ qse_size_t qse_strxncpy (
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qse_size_t len
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);
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/**
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* The qse_strxput() function copies the string @a str into the buffer @a buf
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* of the size @a bsz. Unlike qse_strxcpy(), it does not null-terminate the
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* buffer.
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*/
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qse_size_t qse_strxput (
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qse_char_t* buf,
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qse_size_t bsz,
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const qse_char_t* str
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);
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qse_size_t qse_strxnput (
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qse_char_t* buf,
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qse_size_t bsz,
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const qse_char_t* str,
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qse_size_t len
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);
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/**
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* The qse_strfcpy() function formats a string by position.
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* The position specifier is a number enclosed in ${ and }.
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* When ${ is preceeded by a backslash, it is treated literally.
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* A sameple format string containing the position specifiers are shown below:
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* See the example below:
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* @code
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* "${1} ${3} ${2} \\${1} string"
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* qse_char_t buf[256]
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* qse_char_t* colors[] = { QSE_T("blue"), QSE_T("green"), QSE_T("red") };
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* qse_strfcpy(buf, QSE_T("RGB: ${2}, ${1}, ${0}"), colors);
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* @endcode
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* @sa qse_strfncpy, qse_strxfcpy, qse_strxfncpy
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*/
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qse_size_t qse_strfcpy (
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qse_char_t* buf,
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@ -185,6 +221,9 @@ qse_size_t qse_strfcpy (
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/**
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* The qse_strfncpy() function formats a string by position.
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* It differs from qse_strfcpy() in that @str is an array of the
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* #qse_cstr_t type.
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* @sa qse_strfcpy, qse_strxfcpy, qse_strxfncpy
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*/
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qse_size_t qse_strfncpy (
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qse_char_t* buf,
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@ -194,6 +233,14 @@ qse_size_t qse_strfncpy (
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/**
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* The qse_strxfcpy() function formats a string by position.
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* It differs from qse_strfcpy() in that @a buf is length-bounded of @a bsz
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* characters.
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* @code
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* qse_char_t buf[256]
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* qse_char_t* colors[] = { QSE_T("blue"), QSE_T("green"), QSE_T("red") };
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* qse_strxfcpy(buf, QSE_COUNTOF(buf), QSE_T("RGB: ${2}, ${1}, ${0}"), colors);
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* @endcode
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* @sa qse_strfcpy, qse_strfncpy, qse_strxfncpy
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*/
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qse_size_t qse_strxfcpy (
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qse_char_t* buf,
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@ -204,6 +251,9 @@ qse_size_t qse_strxfcpy (
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/**
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* The qse_strxfncpy() function formats a string by position.
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* It differs from qse_strfcpy() in that @a buf is length-bounded of @a bsz
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* characters and @a str is an array of the #qse_cstr_t type.
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* @sa qse_strfcpy, qse_strfncpy, qse_strxfcpy
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*/
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qse_size_t qse_strxfncpy (
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qse_char_t* buf,
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@ -212,6 +262,32 @@ qse_size_t qse_strxfncpy (
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const qse_cstr_t str[]
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);
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/**
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* The qse_strxsubst() function expands @a fmt into a buffer @a buf of the size
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* @a bsz by substituting new values for ${} segments within it. The actual
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* substitution is made by invoking the callback function @a subst.
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* @code
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* qse_char_t* subst (qse_char_t* buf, qse_size_t bsz, const qse_cstr_t* ident, void* ctx)
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* {
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* if (qse_strxcmp (ident->ptr, ident->len, QSE_T("USER")) == 0)
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* return buf + qse_strxput (buf, bsz, QSE_T("sam"));
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* else if (qse_strxcmp (ident->ptr, ident->len, QSE_T("GROUP")) == 0)
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* return buf + qse_strxput (buf, bsz, QSE_T("coders"));
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* return buf;
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* }
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*
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* qse_char_t buf[25];
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* qse_strxsubst (buf, i, QSE_T("user=${USER},group=${GROUP}"), subst, QSE_NULL);
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* @endcode
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*/
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qse_size_t qse_strxsubst (
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qse_char_t* buf,
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qse_size_t bsz,
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const qse_char_t* fmt,
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qse_strxsubst_subst_t subst,
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void* ctx
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);
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qse_size_t qse_strxcat (
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qse_char_t* buf,
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qse_size_t bsz,
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@ -1,5 +1,5 @@
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/*
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* $Id: str_bas.c 323 2010-04-05 12:50:01Z hyunghwan.chung $
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* $Id: str_bas.c 324 2010-04-29 13:14:13Z hyunghwan.chung $
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*
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Copyright 2006-2009 Chung, Hyung-Hwan.
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This file is part of QSE.
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@ -122,6 +122,39 @@ qse_size_t qse_strxncpy (
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return n;
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}
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qse_size_t qse_strxput (
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qse_char_t* buf, qse_size_t bsz, const qse_char_t* str)
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{
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qse_char_t* p, * p2;
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p = buf; p2 = buf + bsz;
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while (p < p2)
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{
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if (*str == QSE_T('\0')) break;
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*p++ = *str++;
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}
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return p - buf;
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}
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qse_size_t qse_strxnput (
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qse_char_t* buf, qse_size_t bsz, const qse_char_t* str, qse_size_t len)
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{
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qse_char_t* p, * p2;
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const qse_char_t* end;
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p = buf; p2 = buf + bsz; end = str + len;
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while (p < p2)
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{
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if (str >= end) break;
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*p++ = *str++;
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}
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return p - buf;
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}
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qse_size_t qse_strfcpy (
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qse_char_t* buf, const qse_char_t* fmt, const qse_char_t* str[])
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{
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@ -326,6 +359,62 @@ fini:
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return b - buf;
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}
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qse_size_t qse_strxsubst (
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qse_char_t* buf, qse_size_t bsz, const qse_char_t* fmt,
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qse_strxsubst_subst_t subst, void* ctx)
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{
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qse_char_t* b = buf;
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qse_char_t* end = buf + bsz - 1;
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const qse_char_t* f = fmt;
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if (bsz <= 0) return 0;
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while (*f != QSE_T('\0'))
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{
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if (*f == QSE_T('$'))
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{
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if (f[1] == QSE_T('{'))
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{
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const qse_char_t* tmp;
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qse_cstr_t ident;
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f += 2; /* skip ${ */
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tmp = f; /* mark the beginning */
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/* scan an enclosed segment */
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while (*f != QSE_T('\0') && *f != QSE_T('}')) f++;
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if (*f != QSE_T('}'))
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{
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/* restore to the position of $ */
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f = tmp - 2;
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goto normal;
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}
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f++; /* skip } */
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ident.ptr = tmp;
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ident.len = f - tmp - 1;
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b = subst (b, end - b, &ident, ctx);
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if (b >= end) goto fini;
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continue;
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}
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else if (f[1] == QSE_T('$')) f++;
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}
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normal:
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if (b >= end) break;
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*b++ = *f++;
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}
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fini:
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*b = QSE_T('\0');
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return b - buf;
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}
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qse_size_t qse_strxcat (qse_char_t* buf, qse_size_t bsz, const qse_char_t* str)
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{
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qse_char_t* p, * p2;
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@ -508,7 +508,44 @@ static int test11 (void)
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return 0;
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}
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qse_char_t* subst (qse_char_t* buf, qse_size_t bsz, const qse_cstr_t* ident, void* ctx)
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{
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if (qse_strxcmp (ident->ptr, ident->len, QSE_T("USER")) == 0)
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{
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return buf + qse_strxput (buf, bsz, QSE_T("sam"));
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}
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else if (qse_strxcmp (ident->ptr, ident->len, QSE_T("GROUP")) == 0)
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{
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return buf + qse_strxput (buf, bsz, QSE_T("coders"));
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}
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/* don't do anything */
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return buf;
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}
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static int test12 (void)
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{
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qse_char_t buf[24];
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qse_size_t i, j;
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for (i = 0; i <= QSE_COUNTOF(buf); i++)
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{
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qse_strcpy (buf, QSE_T("AAAAAAAAAAAAAAAAAAAAAAA"));
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qse_strxsubst (buf, i, QSE_T("user=${USER},group=${GROUP}"), subst, QSE_NULL);
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qse_printf (QSE_T("bufsize=%02d, buf=[%-25s] "), i, buf);
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qse_printf (QSE_T("["));
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for (j = 0; j < QSE_COUNTOF(buf); j++)
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{
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if (buf[j] == QSE_T('\0')) qse_printf (QSE_T("*"));
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else qse_printf (QSE_T("%c"), buf[j]);
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}
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qse_printf (QSE_T("]\n"));
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}
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return 0;
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}
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static int test13 (void)
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{
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qse_char_t a1[] = QSE_T(" this is a test string ");
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qse_char_t a2[] = QSE_T(" this is a test string ");
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@ -527,7 +564,7 @@ static int test12 (void)
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return 0;
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}
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static int test13 (void)
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static int test14 (void)
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{
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qse_char_t a1[] = QSE_T("abcdefghijklmnopqrstuvwxyz");
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qse_str_t x;
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@ -571,6 +608,7 @@ int main ()
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R (test11);
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R (test12);
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R (test13);
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R (test14);
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return 0;
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}
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