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/*
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* "$Id: mxml-string.c 387 2009-04-18 17:05:52Z mike $"
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*
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* String functions for Mini-XML, a small XML-like file parsing library.
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*
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* Copyright 2003-2009 by Michael Sweet.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2, or (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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* GNU General Public License for more details.
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*
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* Contents:
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*
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* _mxml_snprintf() - Format a string.
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* _mxml_strdup() - Duplicate a string.
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* _mxml_strdupf() - Format and duplicate a string.
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* _mxml_vsnprintf() - Format a string into a fixed size buffer.
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* _mxml_vstrdupf() - Format and duplicate a string.
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*/
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/*
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* Include necessary headers...
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*/
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#include "config.h" |
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#ifndef HAVE_SNPRINTF
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/*
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* '_mxml_snprintf()' - Format a string.
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*/
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int /* O - Number of bytes formatted */ |
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_mxml_snprintf(char *buffer, /* I - Output buffer */ |
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size_t bufsize, /* I - Size of output buffer */
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const char *format, /* I - Printf-style format string */ |
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...) /* I - Additional arguments as needed */
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{
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va_list ap; /* Argument list */
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int bytes; /* Number of bytes formatted */ |
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va_start(ap, format); |
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bytes = vsnprintf(buffer, bufsize, format, ap); |
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va_end(ap); |
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return (bytes);
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} |
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#endif /* !HAVE_SNPRINTF */ |
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/*
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* '_mxml_strdup()' - Duplicate a string.
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*/
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#ifndef HAVE_STRDUP
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char * /* O - New string pointer */ |
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_mxml_strdup(const char *s) /* I - String to duplicate */ |
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{
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char *t; /* New string pointer */ |
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if (s == NULL) |
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return (NULL); |
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if ((t = malloc(strlen(s) + 1)) == NULL) |
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return (NULL); |
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return (strcpy(t, s));
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} |
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#endif /* !HAVE_STRDUP */ |
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/*
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* '_mxml_strdupf()' - Format and duplicate a string.
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*/
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char * /* O - New string pointer */ |
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_mxml_strdupf(const char *format, /* I - Printf-style format string */ |
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...) /* I - Additional arguments as needed */
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{
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va_list ap; /* Pointer to additional arguments */
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char *s; /* Pointer to formatted string */ |
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/*
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* Get a pointer to the additional arguments, format the string,
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* and return it...
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*/
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va_start(ap, format); |
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s = _mxml_vstrdupf(format, ap); |
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va_end(ap); |
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return (s);
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} |
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#ifndef HAVE_VSNPRINTF
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/*
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* '_mxml_vsnprintf()' - Format a string into a fixed size buffer.
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*/
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int /* O - Number of bytes formatted */ |
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_mxml_vsnprintf(char *buffer, /* O - Output buffer */ |
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size_t bufsize, /* O - Size of output buffer */
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const char *format, /* I - Printf-style format string */ |
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va_list ap) /* I - Pointer to additional arguments */
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{
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char *bufptr, /* Pointer to position in buffer */ |
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*bufend, /* Pointer to end of buffer */
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sign, /* Sign of format width */
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size, /* Size character (h, l, L) */
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type; /* Format type character */
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int width, /* Width of field */ |
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prec; /* Number of characters of precision */
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char tformat[100], /* Temporary format string for sprintf() */ |
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*tptr, /* Pointer into temporary format */
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temp[1024]; /* Buffer for formatted numbers */ |
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char *s; /* Pointer to string */ |
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int slen; /* Length of string */ |
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int bytes; /* Total number of bytes needed */ |
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/*
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* Loop through the format string, formatting as needed...
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*/
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bufptr = buffer; |
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bufend = buffer + bufsize - 1;
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bytes = 0;
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while (*format)
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{
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if (*format == '%') |
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{
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tptr = tformat; |
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*tptr++ = *format++; |
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if (*format == '%') |
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{
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if (bufptr && bufptr < bufend) *bufptr++ = *format;
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bytes ++; |
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format ++; |
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continue;
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} |
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else if (strchr(" -+#\'", *format)) |
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{
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*tptr++ = *format; |
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sign = *format++; |
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} |
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else
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sign = 0;
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if (*format == '*') |
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{
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/*
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* Get width from argument...
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*/
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format ++; |
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width = va_arg(ap, int);
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snprintf(tptr, sizeof(tformat) - (tptr - tformat), "%d", width); |
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tptr += strlen(tptr); |
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} |
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else
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{
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width = 0;
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while (isdigit(*format & 255)) |
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{
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if (tptr < (tformat + sizeof(tformat) - 1)) |
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*tptr++ = *format; |
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width = width * 10 + *format++ - '0'; |
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} |
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} |
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if (*format == '.') |
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{
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if (tptr < (tformat + sizeof(tformat) - 1)) |
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*tptr++ = *format; |
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format ++; |
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if (*format == '*') |
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{
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/*
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* Get precision from argument...
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*/
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format ++; |
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prec = va_arg(ap, int);
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snprintf(tptr, sizeof(tformat) - (tptr - tformat), "%d", prec); |
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tptr += strlen(tptr); |
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} |
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else
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{
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prec = 0;
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while (isdigit(*format & 255)) |
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{
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if (tptr < (tformat + sizeof(tformat) - 1)) |
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*tptr++ = *format; |
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prec = prec * 10 + *format++ - '0'; |
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} |
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} |
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} |
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else
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prec = -1;
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if (*format == 'l' && format[1] == 'l') |
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{
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size = 'L';
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if (tptr < (tformat + sizeof(tformat) - 2)) |
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{
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*tptr++ = 'l';
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*tptr++ = 'l';
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} |
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format += 2;
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} |
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else if (*format == 'h' || *format == 'l' || *format == 'L') |
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{
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if (tptr < (tformat + sizeof(tformat) - 1)) |
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*tptr++ = *format; |
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size = *format++; |
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} |
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if (!*format)
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break;
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if (tptr < (tformat + sizeof(tformat) - 1)) |
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*tptr++ = *format; |
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type = *format++; |
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*tptr = '\0';
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switch (type)
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{
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case 'E' : /* Floating point formats */ |
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case 'G' : |
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case 'e' : |
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case 'f' : |
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case 'g' : |
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if ((width + 2) > sizeof(temp)) |
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break;
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sprintf(temp, tformat, va_arg(ap, double));
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bytes += strlen(temp); |
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if (bufptr)
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{
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if ((bufptr + strlen(temp)) > bufend)
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{
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strncpy(bufptr, temp, (size_t)(bufend - bufptr)); |
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bufptr = bufend; |
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} |
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else
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{
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strcpy(bufptr, temp); |
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bufptr += strlen(temp); |
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} |
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} |
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break;
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case 'B' : /* Integer formats */ |
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case 'X' : |
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case 'b' : |
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case 'd' : |
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case 'i' : |
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case 'o' : |
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case 'u' : |
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case 'x' : |
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if ((width + 2) > sizeof(temp)) |
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break;
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#ifdef HAVE_LONG_LONG
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if (size == 'L') |
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sprintf(temp, tformat, va_arg(ap, long long)); |
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else
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#endif /* HAVE_LONG_LONG */ |
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sprintf(temp, tformat, va_arg(ap, int));
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bytes += strlen(temp); |
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if (bufptr)
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{
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if ((bufptr + strlen(temp)) > bufend)
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{
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strncpy(bufptr, temp, (size_t)(bufend - bufptr)); |
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bufptr = bufend; |
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} |
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else
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{
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strcpy(bufptr, temp); |
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bufptr += strlen(temp); |
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} |
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} |
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break;
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case 'p' : /* Pointer value */ |
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if ((width + 2) > sizeof(temp)) |
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break;
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sprintf(temp, tformat, va_arg(ap, void *));
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bytes += strlen(temp); |
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if (bufptr)
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{
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if ((bufptr + strlen(temp)) > bufend)
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{
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strncpy(bufptr, temp, (size_t)(bufend - bufptr)); |
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bufptr = bufend; |
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} |
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else
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{
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strcpy(bufptr, temp); |
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bufptr += strlen(temp); |
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} |
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} |
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break;
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case 'c' : /* Character or character array */ |
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bytes += width; |
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if (bufptr)
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{
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if (width <= 1) |
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*bufptr++ = va_arg(ap, int);
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else
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{
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if ((bufptr + width) > bufend)
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width = bufend - bufptr; |
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memcpy(bufptr, va_arg(ap, char *), (size_t)width);
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bufptr += width; |
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} |
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} |
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break;
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case 's' : /* String */ |
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if ((s = va_arg(ap, char *)) == NULL) |
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s = "(null)";
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slen = strlen(s); |
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if (slen > width && prec != width)
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width = slen; |
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bytes += width; |
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if (bufptr)
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{
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if ((bufptr + width) > bufend)
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width = bufend - bufptr; |
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if (slen > width)
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slen = width; |
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if (sign == '-') |
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{
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strncpy(bufptr, s, (size_t)slen); |
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memset(bufptr + slen, ' ', (size_t)(width - slen));
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} |
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else
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{
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memset(bufptr, ' ', (size_t)(width - slen));
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strncpy(bufptr + width - slen, s, (size_t)slen); |
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} |
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bufptr += width; |
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} |
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break;
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case 'n' : /* Output number of chars so far */ |
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*(va_arg(ap, int *)) = bytes;
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break;
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} |
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} |
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else
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{
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bytes ++; |
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if (bufptr && bufptr < bufend)
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*bufptr++ = *format; |
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format ++; |
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} |
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} |
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/*
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* Nul-terminate the string and return the number of characters needed.
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*/
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*bufptr = '\0';
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return (bytes);
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} |
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#endif /* !HAVE_VSNPRINTF */ |
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/*
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* '_mxml_vstrdupf()' - Format and duplicate a string.
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*/
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char * /* O - New string pointer */ |
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_mxml_vstrdupf(const char *format, /* I - Printf-style format string */ |
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va_list ap) /* I - Pointer to additional arguments */
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{
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int bytes; /* Number of bytes required */ |
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char *buffer, /* String buffer */ |
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temp[256]; /* Small buffer for first vsnprintf */ |
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/*
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* First format with a tiny buffer; this will tell us how many bytes are
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* needed...
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*/
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bytes = vsnprintf(temp, sizeof(temp), format, ap);
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if (bytes < sizeof(temp)) |
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{
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/*
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* Hey, the formatted string fits in the tiny buffer, so just dup that...
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*/
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return (strdup(temp));
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} |
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/*
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* Allocate memory for the whole thing and reformat to the new, larger
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* buffer...
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*/
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if ((buffer = calloc(1, bytes + 1)) != NULL) |
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vsnprintf(buffer, bytes + 1, format, ap);
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/*
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* Return the new string...
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*/
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return (buffer);
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} |
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/*
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* End of "$Id: mxml-string.c 387 2009-04-18 17:05:52Z mike $".
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*/
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