PostGIS  2.2.7dev-r@@SVN_REVISION@@
char * escape_copy_string ( char *  str)

Escape input string suitable for COPY.

If no characters require escaping, simply return the input pointer. Otherwise return a new allocated string.

Definition at line 119 of file shp2pgsql-core.c.

Referenced by ShpLoaderGenerateSQLRowStatement().

120 {
121  /*
122  * Escape the following characters by adding a preceding backslash
123  * tab, backslash, cr, lf
124  *
125  * 1. find # of escaped characters
126  * 2. make new string
127  *
128  */
129 
130  char *result;
131  char *ptr, *optr;
132  int toescape = 0;
133  size_t size;
134 
135  ptr = str;
136 
137  /* Count how many characters we need to escape so we know the size of the string we need to return */
138  while (*ptr)
139  {
140  if (*ptr == '\t' || *ptr == '\\' || *ptr == '\n' || *ptr == '\r')
141  toescape++;
142 
143  ptr++;
144  }
145 
146  /* If we don't have to escape anything, simply return the input pointer */
147  if (toescape == 0)
148  return str;
149 
150  size = ptr - str + toescape + 1;
151  result = calloc(1, size);
152  optr = result;
153  ptr = str;
154 
155  while (*ptr)
156  {
157  if ( *ptr == '\t' || *ptr == '\\' || *ptr == '\n' || *ptr == '\r' )
158  *optr++ = '\\';
159 
160  *optr++ = *ptr++;
161  }
162 
163  *optr = '\0';
164 
165  return result;
166 }

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