lib/xmlEscape.c

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/* Handle escaping for XML files.  Deal with things like
 * & and &quot. */

#include "common.h"
#include "hash.h"
#include "xmlEscape.h"

struct hash *xmlEscapeSymHash()
/* Return hash of predefined xml character symbols to lookup. */
{
struct hash *symHash = newHash(6);
hashAdd(symHash, "lt", "<");
hashAdd(symHash, "gt", ">");
hashAdd(symHash, "amp", "&");
hashAdd(symHash, "apos", "'");
hashAdd(symHash, "quot", "\"");
return symHash;
}

void xmlEscapeBytesToFile(unsigned char *buffer, int len, FILE *f)
/* Write buffer of given length to file, escaping as need be. */
{
unsigned char c;
int i;
for (i=0; i<len; ++i)
    {
    c = buffer[i];
    if (isalnum(c))
        fputc(c, f);
    else
        {
        switch (c)
            {
            case '&':
                fputs("&amp;", f);
                break;
            case '\'':
                fputs("&apos;", f);
                break;
            case '"':
                fputs("&quot;", f);
                break;
            case '<':
                fputs("&lt;", f);
                break;
            case '>':
                fputs("&gt;", f);
                break;
            case ' ':
            case '-':
            case '\t':
            case '\n':
            case ',':
            case '.':
            case ';':
            case ':':
            case '(':
            case ')':
            case '[':
            case ']':
            case '#':
            case '/':
                fputc(c, f);
                break;
            default:
                fprintf(f, "&#%d;", c);
                break;
            }
        }
    }
}

void xmlEscapeStringToFile(char *s, FILE *f)
/* Write escaped zero-terminated string to file. */
{
int len = strlen(s);
xmlEscapeBytesToFile((unsigned char *)s, len, f);
}

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