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50 lines
1.8 KiB
Plaintext
50 lines
1.8 KiB
Plaintext
Description of externally used routines:
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(Not including routines in RITS.C)
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file I/O:
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Files are represented by integers or pointers, returned by
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the various open routines. These routines must return
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the constant OPENLOSS when a file cannot be opened.
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cputc (c, f) output the character c; '\n' implies
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end of line
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c = cgetc (f) input a character; '\n' implies end
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of line; and negative or zero must be
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returned on end-of-file
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b = ceof (f) return TRUE iff end-of-file (last
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character read by cgetc was negative
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or zero)
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gets (buffer) read a line of characters from standard
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input into the buffer, terminated by
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NUL
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ungetc (c, f) push back character onto input stream;
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capacity of 1 character is required
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cclose (f) close file
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cisfd (f) return nonzero if f looks like it is
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a file descriptor
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setprompt (s) make string s the default prompt for
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terminal input (optional, of course)
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Standard files:
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cin standard input (used for terminal input)
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cout standard output (used for messages)
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cerr standard error (used for some fatal errors)
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String routines:
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n = slen (s) return length of string
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b = stcmp (s1, s2) compare for equality of strings
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stcpy (s, d) copy string from s to d
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Storage allocation:
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*i = salloc (n) return n integers [check for storage full]
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*c = calloc (n) return n characters [check for storage full]
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sfree (*i) return integers allocated by salloc
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cfree (*c) return characters allocated by calloc
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n = alocstat (*p, *q) return number of free words of storage
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set *p to size of free space (in words)
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and *q to the number of free blocks
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return -1 if no stats available
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Miscellaneous:
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stkdmp (f) dump stack frames on file for debugging (optional)
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i = cputm () return cpu time in 1/60 sec
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