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96a4fd1bb2
This introduces a "struct membuffer" abstraction that you can write things into, and makes the XML saving code write to the memory buffer rather than a file. The UDDF export already really wanted this: it used to write to a file, only to then read that file back into memory, delete the file, and then *rewrite* the file after doing the magic xslt transform. But the longer-term reason for this is that I want to try to write other formats, and I want to try to share most helpers. And those other formats will need this memory buffer model. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
#ifndef MEMBUFFER_H
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#define MEMBUFFER_H
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struct membuffer {
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unsigned int size, used;
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char *buffer;
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};
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#ifdef __GNUC__
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#define __printf(x,y) __attribute__ ((__format__ (__printf__, x, y)))
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#else
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#define __printf(x,y)
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#endif
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extern void free_buffer(struct membuffer *);
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extern void flush_buffer(struct membuffer *, FILE *);
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extern void put_bytes(struct membuffer *, const char *, int);
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extern void put_string(struct membuffer *, const char *);
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extern __printf(2,0) void put_vformat(struct membuffer *, const char *, va_list);
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extern __printf(2,3) void put_format(struct membuffer *, const char *fmt, ...);
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/* Output one of our "milli" values with type and pre/post data */
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extern void put_milli(struct membuffer *, const char *, int, const char *);
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/*
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* Helper functions for showing particular types. If the type
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* is empty, nothing is done, and the function returns false.
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* Otherwise, it returns true.
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*
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* The two "const char *" at the end are pre/post data.
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*
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* The reason for the pre/post data is so that you can easily
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* prepend and append a string without having to test whether the
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* type is empty. So
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*
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* put_temperature(b, temp, "Temp=", " C\n");
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*
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* writes nothing to the buffer if there is no temperature data,
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* but otherwise would a string that looks something like
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*
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* "Temp=28.1 C\n"
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*
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* to the memory buffer (typically the post/pre will be some XML
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* pattern and unit string or whatever).
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*/
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extern int put_temperature(struct membuffer *, temperature_t, const char *, const char *);
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extern int put_depth(struct membuffer *, depth_t, const char *, const char *);
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extern int put_duration(struct membuffer *, duration_t, const char *, const char *);
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extern int put_pressure(struct membuffer *, pressure_t, const char *, const char *);
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extern int put_salinity(struct membuffer *, int, const char *, const char *);
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#endif
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