scheck.c File Reference

#include "postgres_fe.h"
#include "private.h"

Include dependency graph for scheck.c:

Go to the source code of this file.

Functions
const char *	scheck (const char *string, const char *format)

---

Function Documentation

const char* scheck	(	const char *	string,
		const char *	format
	)

Definition at line 15 of file scheck.c.

References ifree(), imalloc(), is_digit, and NULL.

Referenced by gethms(), inleap(), and rulesub().

{
    char       *fbuf;
    const char *fp;
    char       *tp;
    int         c;
    const char *result;
    char        dummy;

    result = "";
    if (string == NULL || format == NULL)
        return result;
    fbuf = imalloc((int) (2 * strlen(format) + 4));
    if (fbuf == NULL)
        return result;
    fp = format;
    tp = fbuf;
    while ((*tp++ = c = *fp++) != '\0')
    {
        if (c != '%')
            continue;
        if (*fp == '%')
        {
            *tp++ = *fp++;
            continue;
        }
        *tp++ = '*';
        if (*fp == '*')
            ++fp;
        while (is_digit(*fp))
            *tp++ = *fp++;
        if (*fp == 'l' || *fp == 'h')
            *tp++ = *fp++;
        else if (*fp == '[')
            do
                *tp++ = *fp++;
            while (*fp != '\0' && *fp != ']');
        if ((*tp++ = *fp++) == '\0')
            break;
    }
    *(tp - 1) = '%';
    *tp++ = 'c';
    *tp = '\0';
    if (sscanf(string, fbuf, &dummy) != 1)
        result = (char *) format;
    ifree(fbuf);
    return result;
}